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MedChemExpress p300 cbp inhibitor a 485
(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and <t>p300</t> binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.
P300 Cbp Inhibitor A 485, supplied by MedChemExpress, used in various techniques. Bioz Stars score: 96/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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MedChemExpress p300 activator
Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and p300 differential expression; ( F ) The tSNE distribution map of EP300 in various cell types in the scRNA-seq data " width="250" height="auto" />
P300 Activator, supplied by MedChemExpress, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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MedChemExpress p300 inhibitor
Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and p300 differential expression; ( F ) The tSNE distribution map of EP300 in various cell types in the scRNA-seq data " width="250" height="auto" />
P300 Inhibitor, supplied by MedChemExpress, used in various techniques. Bioz Stars score: 96/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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MedChemExpress protac p300 cbp degrader dcbp 1
(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and <t>p300</t> binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.
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MedChemExpress anti p300 antibody
(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and <t>p300</t> binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.
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MedChemExpress p300 activator ctb
(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and <t>p300</t> binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.
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MedChemExpress a 485 p300 inhibitor
HMGN1 and HMGN2 reduce <t>p300-mediated</t> acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.
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BPS Bioscience p300
HMGN1 and HMGN2 reduce <t>p300-mediated</t> acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.
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(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and p300 binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and p300 binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Expressing, RNA Sequencing, Gene Expression, Western Blot, Control, Binding Assay, MANN-WHITNEY

(A) Schematic for generating the knockin allele encoding AID-tagged KMT2D. (B-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB and CUT&RUN analysis. (B) WB of nuclear extracts for KMT2D, ARID1A (BAF), p300, and UTX. Antibodies used were indicated on the right. RbBP5 was the loading control. (C) Pie chart illustrating KMT2D binding status on 38,732 MyoD + enhancers. (D) Heat maps for CUT&RUN of KMT2D, T7 (MyoD), ARID1A (BAF), and p300 on KMT2D prebound or de novo KMT2D binding sites with >2-fold depletion of KMT2D as defined in (C). (E-F) Heat maps ( left panel) for CUT&RUN data on 12,068 MyoD + enhancers with de novo KMT2D binding, further categorized based on BAF binding (E) or p300 binding (F) before and after 4-OHT treatment. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of MyoD (T7) in the 4OHT-treated control. Box plots ( right panel ) showing fold changes of BAF binding intensity (E) or p300 binding intensity (F) between KMT2D-depleted (ΔKMT2D) and control samples. Statistical significance was determined using a one-sided Wilcoxon signed-rank test.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Schematic for generating the knockin allele encoding AID-tagged KMT2D. (B-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB and CUT&RUN analysis. (B) WB of nuclear extracts for KMT2D, ARID1A (BAF), p300, and UTX. Antibodies used were indicated on the right. RbBP5 was the loading control. (C) Pie chart illustrating KMT2D binding status on 38,732 MyoD + enhancers. (D) Heat maps for CUT&RUN of KMT2D, T7 (MyoD), ARID1A (BAF), and p300 on KMT2D prebound or de novo KMT2D binding sites with >2-fold depletion of KMT2D as defined in (C). (E-F) Heat maps ( left panel) for CUT&RUN data on 12,068 MyoD + enhancers with de novo KMT2D binding, further categorized based on BAF binding (E) or p300 binding (F) before and after 4-OHT treatment. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of MyoD (T7) in the 4OHT-treated control. Box plots ( right panel ) showing fold changes of BAF binding intensity (E) or p300 binding intensity (F) between KMT2D-depleted (ΔKMT2D) and control samples. Statistical significance was determined using a one-sided Wilcoxon signed-rank test.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Knock-In, Translocation Assay, Control, Binding Assay

Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with BRG1 inhibitor BRM014 (BRG1i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for KMT2D, p300, and BAF subunits BRG1 and ARID1A. (B) Pie chart illustrating BAF binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of ARID1A (BAF), T7 (MyoD), KMT2D, and p300 on BAF pre-bound and de novo BAF binding sites. (D-E) Chromatin accessibility determined by ATAC-seq signals on MyoD + enhancers. Chromatin accessibility status on BAF prebound sites (D) or de novo BAF binding sites (E) is shown in pie charts ( upper panels ). Average profiles of normalized ATAC-seq reads on constitutively open and MyoD-dependent opening sites are shown in lower panels .

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with BRG1 inhibitor BRM014 (BRG1i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for KMT2D, p300, and BAF subunits BRG1 and ARID1A. (B) Pie chart illustrating BAF binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of ARID1A (BAF), T7 (MyoD), KMT2D, and p300 on BAF pre-bound and de novo BAF binding sites. (D-E) Chromatin accessibility determined by ATAC-seq signals on MyoD + enhancers. Chromatin accessibility status on BAF prebound sites (D) or de novo BAF binding sites (E) is shown in pie charts ( upper panels ). Average profiles of normalized ATAC-seq reads on constitutively open and MyoD-dependent opening sites are shown in lower panels .

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, Binding Assay

(A-D) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP inhibitor A-485 (p300i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were collected for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for p300, KMT2D, ARID1A (BAF) and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Pie chart illustrating p300 binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of p300, T7 (MyoD), ARID1A (BAF), and KMT2D on p300 prebound and de novo p300 binding sites. Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control. (D) Average profiles of normalized ATAC-seq reads on 9,031 de novo p300 binding sites with or without p300i treatment. (E-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP degrader dCBP-1 (p300-deg) for 3h or p300i for 1h. Then, 4-OHT was added for 1h to induce MyoD nuclear translocation. (E) WB of nuclear extracts for p300 or histone extracts for H3K27ac. (F) Violin plot illustrating changes in binding of T7 (MyoD), p300, ARID1A (BAF), and KMT2D upon p300i or p300-deg treatment. The analysis was performed on MyoD + enhancers with >2-fold reduced p300 binding upon p300-deg. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A-D) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP inhibitor A-485 (p300i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were collected for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for p300, KMT2D, ARID1A (BAF) and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Pie chart illustrating p300 binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of p300, T7 (MyoD), ARID1A (BAF), and KMT2D on p300 prebound and de novo p300 binding sites. Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control. (D) Average profiles of normalized ATAC-seq reads on 9,031 de novo p300 binding sites with or without p300i treatment. (E-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP degrader dCBP-1 (p300-deg) for 3h or p300i for 1h. Then, 4-OHT was added for 1h to induce MyoD nuclear translocation. (E) WB of nuclear extracts for p300 or histone extracts for H3K27ac. (F) Violin plot illustrating changes in binding of T7 (MyoD), p300, ARID1A (BAF), and KMT2D upon p300i or p300-deg treatment. The analysis was performed on MyoD + enhancers with >2-fold reduced p300 binding upon p300-deg. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, Binding Assay, Control

(A) C2C12 myoblasts were subjected to 2h or 24h of myogenesis and 2h of p300 inhibition, with A-485 (p300i) applied for 2h prior to experiments. (B) WB of histone extracts for H3K27ac. H3 serves as the loading control. (C-D) Homer motif analysis (C) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (D) on 718 de novo MyoD + p300 + sites after 2h of differentiation. (E-F) Homer motif analysis (E) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (F) on 3,075 de novo MyoD + p300 + sites after 24h of differentiation.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) C2C12 myoblasts were subjected to 2h or 24h of myogenesis and 2h of p300 inhibition, with A-485 (p300i) applied for 2h prior to experiments. (B) WB of histone extracts for H3K27ac. H3 serves as the loading control. (C-D) Homer motif analysis (C) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (D) on 718 de novo MyoD + p300 + sites after 2h of differentiation. (E-F) Homer motif analysis (E) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (F) on 3,075 de novo MyoD + p300 + sites after 24h of differentiation.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Inhibition, Control, ChIP-sequencing

(A) Pie chart illustrating KMT2D protein depletion on 4,578 MyoD + enhancers with de novo binding of KMT2D, BAF, and p300 defined . (B) Bar graphs illustrating effects of ΔKMT2D, BRG1i, and p300i on MyoD + enhancers with de novo binding of KMT2D, BAF, and p300. (C) A model depicting the interdependent relationship between myogenic TF MyoD and chromatin modifiers KMT2D, BAF, p300 on enhancers. (D) Box plots showing the normalized MyoD read counts on 3620 MyoD-bound enhancers, grouped by the presence of MyoD binding decrease upon chromatin modifier interventions (MyoD binding dependency). (E) HOMER de novo motif analysis on BAF-KMT2D-p300 dependent and independent sites defined in (A). (F-G) Heat maps (F) and corresponding box plots (G) illustrating changes in binding of T7 (MyoD), KMT2D, ARID1A (BAF), and p300 on 509 BAF-KMT2D-p300 independent MyoD + enhancers defined in Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT control. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; **p < 0.01; ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Pie chart illustrating KMT2D protein depletion on 4,578 MyoD + enhancers with de novo binding of KMT2D, BAF, and p300 defined . (B) Bar graphs illustrating effects of ΔKMT2D, BRG1i, and p300i on MyoD + enhancers with de novo binding of KMT2D, BAF, and p300. (C) A model depicting the interdependent relationship between myogenic TF MyoD and chromatin modifiers KMT2D, BAF, p300 on enhancers. (D) Box plots showing the normalized MyoD read counts on 3620 MyoD-bound enhancers, grouped by the presence of MyoD binding decrease upon chromatin modifier interventions (MyoD binding dependency). (E) HOMER de novo motif analysis on BAF-KMT2D-p300 dependent and independent sites defined in (A). (F-G) Heat maps (F) and corresponding box plots (G) illustrating changes in binding of T7 (MyoD), KMT2D, ARID1A (BAF), and p300 on 509 BAF-KMT2D-p300 independent MyoD + enhancers defined in Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT control. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; **p < 0.01; ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Binding Assay, Control

(A-C) Heat maps for CUT&RUN data on MyoD + enhancers with de novo KMT2D binding and with intact MyoD signals upon ΔKMT2D (A) , on MyoD + enhancers with de novo BAF binding and with intact MyoD signals upon BRG1i (B) , and on MyoD + enhancers with de novo p300 binding and with intact MyoD signals upon p300i. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A-C) Heat maps for CUT&RUN data on MyoD + enhancers with de novo KMT2D binding and with intact MyoD signals upon ΔKMT2D (A) , on MyoD + enhancers with de novo BAF binding and with intact MyoD signals upon BRG1i (B) , and on MyoD + enhancers with de novo p300 binding and with intact MyoD signals upon p300i. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Binding Assay, Control

Kmt2d AID/AID preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, BRG1i or p300i for 1h, and then 100nM DEX was added for 1h to induce GR nuclear translocation. Cells were collected for WB and ChIP-seq. (A) WB of nuclear extracts for KMT2D, ARID1A, and GR and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 4,097 GR + enhancers with >2-fold KMT2D depletion, prior to DEX treatment. (C-D) Box plots showing the normalized GR read counts (C) and HOMER de novo motif analysis (D) on GR + enhancers with BAF-KMT2D-p300 prebound or de novo sites defined in (B). (E) Heat maps for ChIP-seq of GR, KMT2D, ARID1A (BAF), and p300 on GR + enhancers with de novo binding of BAF, KMT2D, and p300. Heat maps spanned ± 3kb around GR binding sites, and sites were ranked by the intensity of GR in the DEX-treated control. (F) Box plots illustrating changes in binding of GR, KMT2D, ARID1A (BAF), and p300 on 109 BAF-KMT2D-p300-independent GR + enhancers. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: Kmt2d AID/AID preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, BRG1i or p300i for 1h, and then 100nM DEX was added for 1h to induce GR nuclear translocation. Cells were collected for WB and ChIP-seq. (A) WB of nuclear extracts for KMT2D, ARID1A, and GR and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 4,097 GR + enhancers with >2-fold KMT2D depletion, prior to DEX treatment. (C-D) Box plots showing the normalized GR read counts (C) and HOMER de novo motif analysis (D) on GR + enhancers with BAF-KMT2D-p300 prebound or de novo sites defined in (B). (E) Heat maps for ChIP-seq of GR, KMT2D, ARID1A (BAF), and p300 on GR + enhancers with de novo binding of BAF, KMT2D, and p300. Heat maps spanned ± 3kb around GR binding sites, and sites were ranked by the intensity of GR in the DEX-treated control. (F) Box plots illustrating changes in binding of GR, KMT2D, ARID1A (BAF), and p300 on 109 BAF-KMT2D-p300-independent GR + enhancers. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, ChIP-sequencing, Binding Assay, Control

(A) The reported sequential relationships of TF and chromatin modifier enrichment on enhancers established with stable knockout and continuous TF expression models. (B) The interdependent relationships between TF and chromatin modifiers KMT2D, BAF, p300 and among chromatin modifiers on enhancers established with acute interventions of chromatin modifiers and inducible nuclear translocation of TFs.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) The reported sequential relationships of TF and chromatin modifier enrichment on enhancers established with stable knockout and continuous TF expression models. (B) The interdependent relationships between TF and chromatin modifiers KMT2D, BAF, p300 and among chromatin modifiers on enhancers established with acute interventions of chromatin modifiers and inducible nuclear translocation of TFs.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Knock-Out, Expressing, Translocation Assay

Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and "Histone lactylation"-related genes; ( E ) Box plot of p300 differential expression; ( F ) The tSNE distribution map of EP300 in various cell types in the scRNA-seq data

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Modification, Expressing, Quantitative Proteomics

p300 Regulates Histone Lactylation in CD8 + T Cells. Note: ( A ) Schematic representation of the experimental design, showing the workflow for detecting CD8 + T cells treated with lactate, p300 inhibitors, or activators. ( B–C ) WB analysis of PKla levels in CD8 + T cells over time (B) and under varying lactate concentrations ( C ). ( D–E ) WB analysis of the time-dependent ( D ) and dose-dependent ( E ) changes in H3K18la and H3K9la expression in CD8 + T cells following lactate treatment. *** p < 0.001, ** p < 0.01, and * p < 0.05 compared to the 0-h or untreated lactate group. ( F ) WB analysis of H3K18la and H3K9la expression in CD8 + T cells following p300 knockdown, activation, or inhibition. ( G ) ELISA detection of IFN-γ levels in the supernatant of CD8 + T cells across different treatment groups. (H) FCM analysis of GZMB expression in CD8 + T cells. ( I ) FCM analysis of CD8 + T cell proliferation. ( J ) LDH release assay showing the cytotoxic effects of CD8 + T cells on MKN-45 and SNU1 cells. In panels ( F–J ), * p < 0.05, ** p < 0.01, and *** p < 0.001 compared to the control group; # p < 0.05, ## p < 0.01, and ### p < 0.001 compared to the Lactate group; & p < 0.01 compared to the Lactate + sh-NC group. All cell-based experiments were performed in triplicate

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: p300 Regulates Histone Lactylation in CD8 + T Cells. Note: ( A ) Schematic representation of the experimental design, showing the workflow for detecting CD8 + T cells treated with lactate, p300 inhibitors, or activators. ( B–C ) WB analysis of PKla levels in CD8 + T cells over time (B) and under varying lactate concentrations ( C ). ( D–E ) WB analysis of the time-dependent ( D ) and dose-dependent ( E ) changes in H3K18la and H3K9la expression in CD8 + T cells following lactate treatment. *** p < 0.001, ** p < 0.01, and * p < 0.05 compared to the 0-h or untreated lactate group. ( F ) WB analysis of H3K18la and H3K9la expression in CD8 + T cells following p300 knockdown, activation, or inhibition. ( G ) ELISA detection of IFN-γ levels in the supernatant of CD8 + T cells across different treatment groups. (H) FCM analysis of GZMB expression in CD8 + T cells. ( I ) FCM analysis of CD8 + T cell proliferation. ( J ) LDH release assay showing the cytotoxic effects of CD8 + T cells on MKN-45 and SNU1 cells. In panels ( F–J ), * p < 0.05, ** p < 0.01, and *** p < 0.001 compared to the control group; # p < 0.05, ## p < 0.01, and ### p < 0.001 compared to the Lactate group; & p < 0.01 compared to the Lactate + sh-NC group. All cell-based experiments were performed in triplicate

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Expressing, Knockdown, Activation Assay, Inhibition, Enzyme-linked Immunosorbent Assay, Lactate Dehydrogenase Assay, Control

CD8a-NVEs@C646 Facilitates Histone Delactylation Modification in CD8 + T Cells. Note: ( A ) Schematic workflow of RNA-seq and ChIP-seq experiments for CD8 + T cells treated with CD8a-NVEs@C646; ( B–C ) ChIP-seq analysis showing signals at TSS regions in PBS-treated (n = 3) and CD8a-NVEs@C646-treated groups (n = 3); ( D ) RNA-seq volcano plot illustrating significantly upregulated and downregulated genes in the CD8a-NVEs@C646-treated group compared to PBS (n = 3); ( E ) Venn diagram of overlapping genes from ChIP-seq and RNA-seq analyses related to CD8 + T cells; ( F ) ChIP analysis of p300 and H3K18la enrichment at the PDCD1 promoter region; ( G ) The protein interaction between p300 and H3K18la was detected by co-IP assay; ( H ) RT-qPCR analysis of PDCD1 mRNA expression in CD8 + T cells following CD8a-NVEs@C646 treatment; ( I ) WB analysis of PDCD1 and H3K18la protein expression levels in CD8 + T cells treated with CD8a-NVEs@C646. * p < 0.05, *** p < 0.001 compared to the PBS or sh-NC group; experiments were conducted in triplicate

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: CD8a-NVEs@C646 Facilitates Histone Delactylation Modification in CD8 + T Cells. Note: ( A ) Schematic workflow of RNA-seq and ChIP-seq experiments for CD8 + T cells treated with CD8a-NVEs@C646; ( B–C ) ChIP-seq analysis showing signals at TSS regions in PBS-treated (n = 3) and CD8a-NVEs@C646-treated groups (n = 3); ( D ) RNA-seq volcano plot illustrating significantly upregulated and downregulated genes in the CD8a-NVEs@C646-treated group compared to PBS (n = 3); ( E ) Venn diagram of overlapping genes from ChIP-seq and RNA-seq analyses related to CD8 + T cells; ( F ) ChIP analysis of p300 and H3K18la enrichment at the PDCD1 promoter region; ( G ) The protein interaction between p300 and H3K18la was detected by co-IP assay; ( H ) RT-qPCR analysis of PDCD1 mRNA expression in CD8 + T cells following CD8a-NVEs@C646 treatment; ( I ) WB analysis of PDCD1 and H3K18la protein expression levels in CD8 + T cells treated with CD8a-NVEs@C646. * p < 0.05, *** p < 0.001 compared to the PBS or sh-NC group; experiments were conducted in triplicate

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Modification, RNA Sequencing, ChIP-sequencing, Co-Immunoprecipitation Assay, Quantitative RT-PCR, Expressing

Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: Bioinformatics Analysis Identifies Key Factors in Histone Lactylation Modification. Note: ( A ) Schematic workflow of bioinformatics analysis for identifying key factors; ( B ) Volcano plot of DEGs in tumor tissues and adjacent normal tissues from dataset GSE2685 (Normal = 8, Tumor = 22); ( C ) Heatmap showing the correlation of co-expression module genes with tumor and normal tissues, with each cell displaying the correlation coefficient and p -value; ( D ) Venn diagram illustrating the intersection of Blue module genes, DEGs, CD8 + T cell-related genes, and "Histone lactylation"-related genes; ( E ) Box plot of p300 differential expression; ( F ) The tSNE distribution map of EP300 in various cell types in the scRNA-seq data

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Modification, Expressing, Quantitative Proteomics

p300 Regulates Histone Lactylation in CD8 + T Cells. Note: ( A ) Schematic representation of the experimental design, showing the workflow for detecting CD8 + T cells treated with lactate, p300 inhibitors, or activators. ( B–C ) WB analysis of PKla levels in CD8 + T cells over time (B) and under varying lactate concentrations ( C ). ( D–E ) WB analysis of the time-dependent ( D ) and dose-dependent ( E ) changes in H3K18la and H3K9la expression in CD8 + T cells following lactate treatment. *** p < 0.001, ** p < 0.01, and * p < 0.05 compared to the 0-h or untreated lactate group. ( F ) WB analysis of H3K18la and H3K9la expression in CD8 + T cells following p300 knockdown, activation, or inhibition. ( G ) ELISA detection of IFN-γ levels in the supernatant of CD8 + T cells across different treatment groups. (H) FCM analysis of GZMB expression in CD8 + T cells. ( I ) FCM analysis of CD8 + T cell proliferation. ( J ) LDH release assay showing the cytotoxic effects of CD8 + T cells on MKN-45 and SNU1 cells. In panels ( F–J ), * p < 0.05, ** p < 0.01, and *** p < 0.001 compared to the control group; # p < 0.05, ## p < 0.01, and ### p < 0.001 compared to the Lactate group; & p < 0.01 compared to the Lactate + sh-NC group. All cell-based experiments were performed in triplicate

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: p300 Regulates Histone Lactylation in CD8 + T Cells. Note: ( A ) Schematic representation of the experimental design, showing the workflow for detecting CD8 + T cells treated with lactate, p300 inhibitors, or activators. ( B–C ) WB analysis of PKla levels in CD8 + T cells over time (B) and under varying lactate concentrations ( C ). ( D–E ) WB analysis of the time-dependent ( D ) and dose-dependent ( E ) changes in H3K18la and H3K9la expression in CD8 + T cells following lactate treatment. *** p < 0.001, ** p < 0.01, and * p < 0.05 compared to the 0-h or untreated lactate group. ( F ) WB analysis of H3K18la and H3K9la expression in CD8 + T cells following p300 knockdown, activation, or inhibition. ( G ) ELISA detection of IFN-γ levels in the supernatant of CD8 + T cells across different treatment groups. (H) FCM analysis of GZMB expression in CD8 + T cells. ( I ) FCM analysis of CD8 + T cell proliferation. ( J ) LDH release assay showing the cytotoxic effects of CD8 + T cells on MKN-45 and SNU1 cells. In panels ( F–J ), * p < 0.05, ** p < 0.01, and *** p < 0.001 compared to the control group; # p < 0.05, ## p < 0.01, and ### p < 0.001 compared to the Lactate group; & p < 0.01 compared to the Lactate + sh-NC group. All cell-based experiments were performed in triplicate

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Expressing, Knockdown, Activation Assay, Inhibition, Enzyme-linked Immunosorbent Assay, Lactate Dehydrogenase Assay, Control

CD8a-NVEs@C646 Facilitates Histone Delactylation Modification in CD8 + T Cells. Note: ( A ) Schematic workflow of RNA-seq and ChIP-seq experiments for CD8 + T cells treated with CD8a-NVEs@C646; ( B–C ) ChIP-seq analysis showing signals at TSS regions in PBS-treated (n = 3) and CD8a-NVEs@C646-treated groups (n = 3); ( D ) RNA-seq volcano plot illustrating significantly upregulated and downregulated genes in the CD8a-NVEs@C646-treated group compared to PBS (n = 3); ( E ) Venn diagram of overlapping genes from ChIP-seq and RNA-seq analyses related to CD8 + T cells; ( F ) ChIP analysis of p300 and H3K18la enrichment at the PDCD1 promoter region; ( G ) The protein interaction between p300 and H3K18la was detected by co-IP assay; ( H ) RT-qPCR analysis of PDCD1 mRNA expression in CD8 + T cells following CD8a-NVEs@C646 treatment; ( I ) WB analysis of PDCD1 and H3K18la protein expression levels in CD8 + T cells treated with CD8a-NVEs@C646. * p < 0.05, *** p < 0.001 compared to the PBS or sh-NC group; experiments were conducted in triplicate

Journal: Journal of Nanobiotechnology

Article Title: CD8a antibody-functionalized biomimetic red blood cell membrane ectosomes delivering C646 reverse CD8⁺ T Cell exhaustion via H3K18la histone delactylation in gastric cardia adenocarcinoma

doi: 10.1186/s12951-025-03957-z

Figure Lengend Snippet: CD8a-NVEs@C646 Facilitates Histone Delactylation Modification in CD8 + T Cells. Note: ( A ) Schematic workflow of RNA-seq and ChIP-seq experiments for CD8 + T cells treated with CD8a-NVEs@C646; ( B–C ) ChIP-seq analysis showing signals at TSS regions in PBS-treated (n = 3) and CD8a-NVEs@C646-treated groups (n = 3); ( D ) RNA-seq volcano plot illustrating significantly upregulated and downregulated genes in the CD8a-NVEs@C646-treated group compared to PBS (n = 3); ( E ) Venn diagram of overlapping genes from ChIP-seq and RNA-seq analyses related to CD8 + T cells; ( F ) ChIP analysis of p300 and H3K18la enrichment at the PDCD1 promoter region; ( G ) The protein interaction between p300 and H3K18la was detected by co-IP assay; ( H ) RT-qPCR analysis of PDCD1 mRNA expression in CD8 + T cells following CD8a-NVEs@C646 treatment; ( I ) WB analysis of PDCD1 and H3K18la protein expression levels in CD8 + T cells treated with CD8a-NVEs@C646. * p < 0.05, *** p < 0.001 compared to the PBS or sh-NC group; experiments were conducted in triplicate

Article Snippet: The p300 activator (cholera toxin B subunit, CTB; HY-134964) and p300 inhibitor (C646; HY-13823) were both purchased from MCE (USA); (3) PBS + vector group, CD8a-NVEs@C646 + vector group, and CD8a-NVEs@C646 + PDCD1 group, all treated with 20 mM sodium lactate for 24 h, with CD8a-NVEs@C646 treatment for 48 h. Cells from all groups were harvested for downstream analysis.

Techniques: Modification, RNA Sequencing, ChIP-sequencing, Co-Immunoprecipitation Assay, Quantitative RT-PCR, Expressing

(A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and p300 binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Schematic of the 4-OHT-inducible MyoD-ER system. (B) MyoD expression in preadipocytes and C2C12 myoblasts was determined using RNA-Seq (n = 1). RPKM values indicate gene expression levels. (C) Western blot (WB) analysis of nuclear extracts from preadipocytes expressing MyoD-ER-T7 and treated with 4-OHT. Antibodies used were indicated on the right. BRG1 was used as a loading control. (D-I) MyoD-ER-T7 expressing preadipocytes were treated with 4-OHT for 1 hour (h), followed by CUT&RUN analysis. (D) Bar chart showing ARID1A (an exclusive subunit of BAF), KMT2D, and p300 binding status on induced MyoD sites. (E) Box plots displaying the normalized MyoD read counts in subgroups defined in (D). (F) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 38,732 MyoD + enhancers defined in (D) prior to 4-OHT treatment. (G-H) Box plots showing the normalized MyoD read counts (G) and HOMER de novo motif analysis (H) on BAF-KMT2D-p300 prebound or de novo sites defined in (F). Statistical significance was determined using a two-sided, unpaired Mann Whitney test. (I) Genome browser view of MyoD binding sites around Maged1 and Cap2 loci.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Expressing, RNA Sequencing, Gene Expression, Western Blot, Control, Binding Assay, MANN-WHITNEY

(A) Schematic for generating the knockin allele encoding AID-tagged KMT2D. (B-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB and CUT&RUN analysis. (B) WB of nuclear extracts for KMT2D, ARID1A (BAF), p300, and UTX. Antibodies used were indicated on the right. RbBP5 was the loading control. (C) Pie chart illustrating KMT2D binding status on 38,732 MyoD + enhancers. (D) Heat maps for CUT&RUN of KMT2D, T7 (MyoD), ARID1A (BAF), and p300 on KMT2D prebound or de novo KMT2D binding sites with >2-fold depletion of KMT2D as defined in (C). (E-F) Heat maps ( left panel) for CUT&RUN data on 12,068 MyoD + enhancers with de novo KMT2D binding, further categorized based on BAF binding (E) or p300 binding (F) before and after 4-OHT treatment. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of MyoD (T7) in the 4OHT-treated control. Box plots ( right panel ) showing fold changes of BAF binding intensity (E) or p300 binding intensity (F) between KMT2D-depleted (ΔKMT2D) and control samples. Statistical significance was determined using a one-sided Wilcoxon signed-rank test.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Schematic for generating the knockin allele encoding AID-tagged KMT2D. (B-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB and CUT&RUN analysis. (B) WB of nuclear extracts for KMT2D, ARID1A (BAF), p300, and UTX. Antibodies used were indicated on the right. RbBP5 was the loading control. (C) Pie chart illustrating KMT2D binding status on 38,732 MyoD + enhancers. (D) Heat maps for CUT&RUN of KMT2D, T7 (MyoD), ARID1A (BAF), and p300 on KMT2D prebound or de novo KMT2D binding sites with >2-fold depletion of KMT2D as defined in (C). (E-F) Heat maps ( left panel) for CUT&RUN data on 12,068 MyoD + enhancers with de novo KMT2D binding, further categorized based on BAF binding (E) or p300 binding (F) before and after 4-OHT treatment. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of MyoD (T7) in the 4OHT-treated control. Box plots ( right panel ) showing fold changes of BAF binding intensity (E) or p300 binding intensity (F) between KMT2D-depleted (ΔKMT2D) and control samples. Statistical significance was determined using a one-sided Wilcoxon signed-rank test.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Knock-In, Translocation Assay, Control, Binding Assay

Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with BRG1 inhibitor BRM014 (BRG1i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for KMT2D, p300, and BAF subunits BRG1 and ARID1A. (B) Pie chart illustrating BAF binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of ARID1A (BAF), T7 (MyoD), KMT2D, and p300 on BAF pre-bound and de novo BAF binding sites. (D-E) Chromatin accessibility determined by ATAC-seq signals on MyoD + enhancers. Chromatin accessibility status on BAF prebound sites (D) or de novo BAF binding sites (E) is shown in pie charts ( upper panels ). Average profiles of normalized ATAC-seq reads on constitutively open and MyoD-dependent opening sites are shown in lower panels .

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with BRG1 inhibitor BRM014 (BRG1i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were harvested for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for KMT2D, p300, and BAF subunits BRG1 and ARID1A. (B) Pie chart illustrating BAF binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of ARID1A (BAF), T7 (MyoD), KMT2D, and p300 on BAF pre-bound and de novo BAF binding sites. (D-E) Chromatin accessibility determined by ATAC-seq signals on MyoD + enhancers. Chromatin accessibility status on BAF prebound sites (D) or de novo BAF binding sites (E) is shown in pie charts ( upper panels ). Average profiles of normalized ATAC-seq reads on constitutively open and MyoD-dependent opening sites are shown in lower panels .

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, Binding Assay

(A-D) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP inhibitor A-485 (p300i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were collected for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for p300, KMT2D, ARID1A (BAF) and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Pie chart illustrating p300 binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of p300, T7 (MyoD), ARID1A (BAF), and KMT2D on p300 prebound and de novo p300 binding sites. Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control. (D) Average profiles of normalized ATAC-seq reads on 9,031 de novo p300 binding sites with or without p300i treatment. (E-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP degrader dCBP-1 (p300-deg) for 3h or p300i for 1h. Then, 4-OHT was added for 1h to induce MyoD nuclear translocation. (E) WB of nuclear extracts for p300 or histone extracts for H3K27ac. (F) Violin plot illustrating changes in binding of T7 (MyoD), p300, ARID1A (BAF), and KMT2D upon p300i or p300-deg treatment. The analysis was performed on MyoD + enhancers with >2-fold reduced p300 binding upon p300-deg. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A-D) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP inhibitor A-485 (p300i) for 1h, and then 4-OHT was added for 1h to induce MyoD nuclear translocation. Cells were collected for WB, CUT&RUN, and ATAC-seq. (A) WB of nuclear extracts for p300, KMT2D, ARID1A (BAF) and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Pie chart illustrating p300 binding status on 38,732 MyoD + enhancers. (C) Heat maps for CUT&RUN of p300, T7 (MyoD), ARID1A (BAF), and KMT2D on p300 prebound and de novo p300 binding sites. Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control. (D) Average profiles of normalized ATAC-seq reads on 9,031 de novo p300 binding sites with or without p300i treatment. (E-F) Kmt2d AID/AID ; MyoD-ER-T7 preadipocytes were pretreated with p300/CBP degrader dCBP-1 (p300-deg) for 3h or p300i for 1h. Then, 4-OHT was added for 1h to induce MyoD nuclear translocation. (E) WB of nuclear extracts for p300 or histone extracts for H3K27ac. (F) Violin plot illustrating changes in binding of T7 (MyoD), p300, ARID1A (BAF), and KMT2D upon p300i or p300-deg treatment. The analysis was performed on MyoD + enhancers with >2-fold reduced p300 binding upon p300-deg. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, Binding Assay, Control

(A) C2C12 myoblasts were subjected to 2h or 24h of myogenesis and 2h of p300 inhibition, with A-485 (p300i) applied for 2h prior to experiments. (B) WB of histone extracts for H3K27ac. H3 serves as the loading control. (C-D) Homer motif analysis (C) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (D) on 718 de novo MyoD + p300 + sites after 2h of differentiation. (E-F) Homer motif analysis (E) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (F) on 3,075 de novo MyoD + p300 + sites after 24h of differentiation.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) C2C12 myoblasts were subjected to 2h or 24h of myogenesis and 2h of p300 inhibition, with A-485 (p300i) applied for 2h prior to experiments. (B) WB of histone extracts for H3K27ac. H3 serves as the loading control. (C-D) Homer motif analysis (C) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (D) on 718 de novo MyoD + p300 + sites after 2h of differentiation. (E-F) Homer motif analysis (E) and heat maps for ChIP-seq of MyoD and CUT&RUN of p300 (F) on 3,075 de novo MyoD + p300 + sites after 24h of differentiation.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Inhibition, Control, ChIP-sequencing

(A) Pie chart illustrating KMT2D protein depletion on 4,578 MyoD + enhancers with de novo binding of KMT2D, BAF, and p300 defined . (B) Bar graphs illustrating effects of ΔKMT2D, BRG1i, and p300i on MyoD + enhancers with de novo binding of KMT2D, BAF, and p300. (C) A model depicting the interdependent relationship between myogenic TF MyoD and chromatin modifiers KMT2D, BAF, p300 on enhancers. (D) Box plots showing the normalized MyoD read counts on 3620 MyoD-bound enhancers, grouped by the presence of MyoD binding decrease upon chromatin modifier interventions (MyoD binding dependency). (E) HOMER de novo motif analysis on BAF-KMT2D-p300 dependent and independent sites defined in (A). (F-G) Heat maps (F) and corresponding box plots (G) illustrating changes in binding of T7 (MyoD), KMT2D, ARID1A (BAF), and p300 on 509 BAF-KMT2D-p300 independent MyoD + enhancers defined in Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT control. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; **p < 0.01; ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) Pie chart illustrating KMT2D protein depletion on 4,578 MyoD + enhancers with de novo binding of KMT2D, BAF, and p300 defined . (B) Bar graphs illustrating effects of ΔKMT2D, BRG1i, and p300i on MyoD + enhancers with de novo binding of KMT2D, BAF, and p300. (C) A model depicting the interdependent relationship between myogenic TF MyoD and chromatin modifiers KMT2D, BAF, p300 on enhancers. (D) Box plots showing the normalized MyoD read counts on 3620 MyoD-bound enhancers, grouped by the presence of MyoD binding decrease upon chromatin modifier interventions (MyoD binding dependency). (E) HOMER de novo motif analysis on BAF-KMT2D-p300 dependent and independent sites defined in (A). (F-G) Heat maps (F) and corresponding box plots (G) illustrating changes in binding of T7 (MyoD), KMT2D, ARID1A (BAF), and p300 on 509 BAF-KMT2D-p300 independent MyoD + enhancers defined in Heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT control. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; **p < 0.01; ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Binding Assay, Control

(A-C) Heat maps for CUT&RUN data on MyoD + enhancers with de novo KMT2D binding and with intact MyoD signals upon ΔKMT2D (A) , on MyoD + enhancers with de novo BAF binding and with intact MyoD signals upon BRG1i (B) , and on MyoD + enhancers with de novo p300 binding and with intact MyoD signals upon p300i. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A-C) Heat maps for CUT&RUN data on MyoD + enhancers with de novo KMT2D binding and with intact MyoD signals upon ΔKMT2D (A) , on MyoD + enhancers with de novo BAF binding and with intact MyoD signals upon BRG1i (B) , and on MyoD + enhancers with de novo p300 binding and with intact MyoD signals upon p300i. All heat maps spanned ± 3kb around MyoD binding sites, and sites were ranked by the intensity of T7 (MyoD) in the 4OHT-treated control.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Binding Assay, Control

Kmt2d AID/AID preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, BRG1i or p300i for 1h, and then 100nM DEX was added for 1h to induce GR nuclear translocation. Cells were collected for WB and ChIP-seq. (A) WB of nuclear extracts for KMT2D, ARID1A, and GR and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 4,097 GR + enhancers with >2-fold KMT2D depletion, prior to DEX treatment. (C-D) Box plots showing the normalized GR read counts (C) and HOMER de novo motif analysis (D) on GR + enhancers with BAF-KMT2D-p300 prebound or de novo sites defined in (B). (E) Heat maps for ChIP-seq of GR, KMT2D, ARID1A (BAF), and p300 on GR + enhancers with de novo binding of BAF, KMT2D, and p300. Heat maps spanned ± 3kb around GR binding sites, and sites were ranked by the intensity of GR in the DEX-treated control. (F) Box plots illustrating changes in binding of GR, KMT2D, ARID1A (BAF), and p300 on 109 BAF-KMT2D-p300-independent GR + enhancers. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: Kmt2d AID/AID preadipocytes were pretreated with 5Ph-IAA (ΔKMT2D) for 2h, BRG1i or p300i for 1h, and then 100nM DEX was added for 1h to induce GR nuclear translocation. Cells were collected for WB and ChIP-seq. (A) WB of nuclear extracts for KMT2D, ARID1A, and GR and histone extracts for H3K27ac. RbBP5 and H3 serve as loading controls. (B) Bar chart showing ARID1A (BAF), KMT2D, and p300 binding on 4,097 GR + enhancers with >2-fold KMT2D depletion, prior to DEX treatment. (C-D) Box plots showing the normalized GR read counts (C) and HOMER de novo motif analysis (D) on GR + enhancers with BAF-KMT2D-p300 prebound or de novo sites defined in (B). (E) Heat maps for ChIP-seq of GR, KMT2D, ARID1A (BAF), and p300 on GR + enhancers with de novo binding of BAF, KMT2D, and p300. Heat maps spanned ± 3kb around GR binding sites, and sites were ranked by the intensity of GR in the DEX-treated control. (F) Box plots illustrating changes in binding of GR, KMT2D, ARID1A (BAF), and p300 on 109 BAF-KMT2D-p300-independent GR + enhancers. Statistical significance was determined using a one-sided Wilcoxon signed-rank test. n.s. not significant; *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Translocation Assay, ChIP-sequencing, Binding Assay, Control

(A) The reported sequential relationships of TF and chromatin modifier enrichment on enhancers established with stable knockout and continuous TF expression models. (B) The interdependent relationships between TF and chromatin modifiers KMT2D, BAF, p300 and among chromatin modifiers on enhancers established with acute interventions of chromatin modifiers and inducible nuclear translocation of TFs.

Journal: bioRxiv

Article Title: Chromatin modifiers KMT2D, BAF, and p300 are required for de novo binding of transcription factors on enhancers

doi: 10.64898/2026.01.29.702555

Figure Lengend Snippet: (A) The reported sequential relationships of TF and chromatin modifier enrichment on enhancers established with stable knockout and continuous TF expression models. (B) The interdependent relationships between TF and chromatin modifiers KMT2D, BAF, p300 and among chromatin modifiers on enhancers established with acute interventions of chromatin modifiers and inducible nuclear translocation of TFs.

Article Snippet: PROTAC p300/CBP degrader dCBP-1 (#HY-134582) from MCE was used at 250nM. p300/CBP inhibitor A-485 (#6887) was from Tocris Bioscience and used at 3μM. (Z)-4-Hydroxytamoxifen (4-OHT) (#H7904) and Dexamethasone (DEX) (#D4902) were from Millipore-Sigma and used at 400nM and 100nM, respectively.

Techniques: Knock-Out, Expressing, Translocation Assay

HMGN1 and HMGN2 reduce p300-mediated acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.

Journal: The Journal of Biological Chemistry

Article Title: HMGN1 and HMGN2 are recruited to acetylated and histone variant H2A.Z-containing nucleosomes to regulate chromatin state and transcription

doi: 10.1016/j.jbc.2025.110997

Figure Lengend Snippet: HMGN1 and HMGN2 reduce p300-mediated acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.

Article Snippet: Cells treated with the A-485 p300 inhibitor (MedChemExpress; catalog no.: HY-107455) were treated with standard mESC media with a final concentration of 10 μM A-485 for 1 h at 37 °C.

Techniques: Western Blot, Recombinant, Sequencing, Incubation, Binding Assay, Modification

HMGN1 and HMGN2 reduce p300-mediated acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.

Journal: The Journal of Biological Chemistry

Article Title: HMGN1 and HMGN2 are recruited to acetylated and histone variant H2A.Z-containing nucleosomes to regulate chromatin state and transcription

doi: 10.1016/j.jbc.2025.110997

Figure Lengend Snippet: HMGN1 and HMGN2 reduce p300-mediated acetylation of the H3 tail . A , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 or GST-HMGN1ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. B , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 or GST-HMGN2ΔC protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K18, K23, and K27 was imaged via PTM-specific antibodies. C , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. D , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2A.Z-containing mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. E , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN1 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. F , Western blot analysis of HAT reaction mixtures containing equal amounts of recombinant mononucleosomes (canonical nuc.) or recombinant H2AE61A mononucleosomes with 147 base pairs of 601 sequence DNA, preincubated with variable amounts of recombinant GST-HMGN2 protein and then incubated with equal amounts of recombinant p300 and acetyl-CoA. H3 lysine acetylation of K27 was imaged via PTM-specific antibodies. GST, glutathione- S -transferase; HAT, histone acetyltransferase; HMGN, High Mobility Nucleosome-binding protein; PTM, post-translational modification.

Article Snippet: HAT assays were performed at 37 ̊C for 30 min with 500 nM purified p300 (BPS Biosciences; catalog no.: 50071), 300 nM nucleosome substrate (Epicypher 16-0009, 16-1014, or 16-1014), 100 μM acetyl-CoA (Sigma; catalog no.: A2056), and 100 nM, 300 nM, or 900 nM purified GST-HMGN protein (HMGN1, HMGN2, HMGN1ΔC, or HMGN2ΔC) in a reaction volume of 10 μl (in HAT buffer: 50 nM Tris–HCl [pH 8.0], 10% glycerol, 1 mM DTT, 0.1 mM EDTA, 1 mM PMSF, and 10 mM sodium butyrate).

Techniques: Western Blot, Recombinant, Sequencing, Incubation, Binding Assay, Modification