cnot3 ab (Novus Biologicals)
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Cnot3 Ab, supplied by Novus Biologicals, used in various techniques. Bioz Stars score: 90/100, based on 10 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/cnot3 ab/product/Novus Biologicals
Average 90 stars, based on 10 article reviews
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1) Product Images from "Transcriptional regulator CNOT3 defines an aggressive colorectal cancer subtype"
Article Title: Transcriptional regulator CNOT3 defines an aggressive colorectal cancer subtype
Journal: Cancer research
doi: 10.1158/0008-5472.CAN-16-1346
Figure Legend Snippet: (A) Schema of the contrast in chromatin at inactive genomic regions (left) and marked nucleosome pairs flanking active, transcription factor (TF)-bound sites (right). (B) Integrative Genome Viewer (IGV) tracks showing H3K4me2+ nucleosomes shared across samples (e.g., at the ACVR1B locus) and others found specifically in certain Ad-Ca pairs (e.g., upstream of ANKRD33). (C) Heatmap representation of unsupervised clustering and Spearman correlations among genome-wide H3K4me2-marked nucleosomes in 10 pairs of human colon cancers (Ca) and the corresponding adenomas (Ad). Correlations are highest between individual Ad-Ca pairs. (D) Heatmap of nucleosomal H3K4me2 signals at the 1000 most differentially marked regions in Ca2 and Ca9, compared to their respective Ad. The sequence motifs most enriched in these Ca, shown below, are attributed to the TFs CNOT3 and TRIM28. (E) IGV traces of representative differential nucleosome pairs in Ad-Ca2 and Ad-Ca9. (F) Distribution of the 1000 top-scoring differential nucleosome pairs in Ca2 and Ca9, compared to their respective precursor Ad.
Techniques Used: Genome Wide, Sequencing
Figure Legend Snippet: (A–C) Immunohistochemistry (IHC) for TRIM28 (A), CNOT3 (B) and KI67 (right) in serial sections of a representative CRC specimen. While TRIM28 is expressed in all tumor cells, CNOT3 is expressed in a minority of scattered nuclei, compared to a much larger fraction of KI67+ cells, with modest overlap of CNOT3 and KI67. The areas boxed in b and c are magnified below. (D) Mean counts (± SD) of CNOT3+ and KI67+ nuclei from 500 cells in each of 3 independent CNOT3+ CRCs. (E) IHC for CNOT3 (left) and KI67 (right) in serial sections of normal human colon mucosa, showing CNOT3 in some (black arrows) but not most (red arrows, e.g.) KI67+ crypt epithelial cells. (F) Immunoblot analysis of CNOT3 in murine intestinal Lgr5+ cells sorted by flow cytometry and in isolated intestinal crypts and villi. HCT116 human CRC cells serve as a positive control. (G) Immunoblot analysis of cytoplasmic (Cy) and nuclear (Nu) fractions of HCT116 and Caco-2 cells, showing presence of CNOT1 and CNOT3 in both fractions. LaminB1 and GAPDH serve as positive controls for the Nu and Cy fractions, respectively. (H) CNOT3 immunocytochemistry in HCT116 and Caco-2 cells, showing both Nu and Cy staining. All scale bars, 50 µm.
Techniques Used: Immunohistochemistry, Western Blot, Flow Cytometry, Isolation, Positive Control, Immunocytochemistry, Staining
Figure Legend Snippet: (A) CNOT3 immunocytochemistry in HCT116 cells treated with control, non-specific (NS) shRNA (left) or with CNOT3-specific shRNA #3 (right), confirming CNOT3 loss and Ab specificity and showing typical changes in morphology of CNOT3-depleted cells. (B) Immunoblot analysis of nuclear (Nu) and cytoplasmic (Cy) fractions of HCT116 cells treated with non-specific (NS) or CNOT3-specific shRNA #3. LaminB1 and GAPDH serve to mark the Nu and Cy fractions, respectively. (C) Reduced CNOT3 levels, achieved with two independent shRNAs (#3 and #5, immunoblot in the inset), impaired proliferation of CRC cell lines HCT116 (left) and Caco-2 (right), compared to treatment with a non-specific (NS) control shRNA. Each value represents the mean ± SD optical density from triplicate samples; other cell lines are shown in Suppl. Fig. 3C. (D) Reduced growth of CNOT3-depleted HCT116 cells in murine xenografts. Each plotted value represents the mean ± SD from 5 replicates. (E–G) Significantly reduced phospho-Histone H3 staining (E, determined manually in blind counts) and BrdU uptake (F, determined by flow cytometry) in CNOT3-depleted HCT116 and Caco-2 cells, without concomitant change in apoptotic AnnexinV+ cells (G, flow cytometry). Graphs represent the mean ± SD from 3 replicates. (F) An shRNA-resistant CNOT3 cDNA construct, but not a GFP cDNA control, restored cell replication in HCT116 cells depleted of endogenous CNOT3 using shRNA #3. The immunoblot shows relative CNOT3 and GAPDH levels in total cell lysates.
Techniques Used: Immunocytochemistry, Control, shRNA, Western Blot, Staining, Flow Cytometry, Construct
Figure Legend Snippet: (A) Representative IGV traces of CNOT3 binding sites identified by ChIP-seq at promoters and intergenic regions in Ca9, Ca2 and HCT116 and corresponding motif analysis and z-scores. (B) Distribution of CNOT3 binding sites in Ca9, Ca2, and HCT116. (C) Overlap of CNOT3 binding sites in the 3 sources of data at TSSs (top) and intergenic regions (bottom). (D) Heatmap of H3K4me2-marked nucleosomes in three CRCs at CNOT3 binding sites identified in Ca9. K-means clustering (k=3) reveals groups of sites with or without marked flanking nucleosomes; IGV traces representing the first cluster and the two other largely similar clusters are shown to the right. (E) Average distribution of H3K4me2 signals in an archival CNOT3hi CRC (inset: CNOT3 IHC; scale bar, 50 µm) flanking the 1,000 most accessible regions in Ca9. (F) GREAT analysis of CNOT3 binding sites ≤30 kb from TSSs, showing the top over-represented categories from the MSigDB ontology of genetic and chemical perturbations. Binomial corrected (FDR) p-values are shown at log10 scale; all GREAT-derived ontologies are listed in Suppl. Table 2.
Techniques Used: Binding Assay, ChIP-sequencing, Derivative Assay
Figure Legend Snippet: (A) Scatter plot of RNA-seq analysis showing genes differentially expressed (q <0.001) in triplicate samples of HCT116 cells treated with a non-specific shRNA (NS, x-axis) or CNOT3 shRNA #3 (y-axis). Genes with (blue dots) and without (green or orange dots) nearby CNOT3 binding are colored and the top Gene Ontology terms (derived from Ingenuity analysis) enriched among genes affected by CNOT3 deficiency are shown. (B) Proportions of CNOT3 binding near genes that are differentially expressed (top) or unaffected (bottom) in CNOT3-depleted cells. (C) qRT-PCR verification of increased transcript levels of selected genes derepressed in CNOT3-deficient HCT116 cells. (D) Representative gene expression changes occurring in CNOT3-depleted HCT116 cells are rescued by shRNA-resistant cDNA, indicating shRNA specificity. (E) Heatmaps showing presence or absence of RNA polymerase II (Pol2), H3K4me3, DHS, DNA methylation and mRNA expression in parental HCT116 cells at CNOT3-bound promoters. Selected genes affected by CNOT3 depletion are listed. (F) Representative IGV traces for each class of CNOT3-bound promoters, showing various chromatin features and RNA-seq data from control and CNOT3-deficient cells.
Techniques Used: RNA Sequencing, shRNA, Binding Assay, Derivative Assay, Quantitative RT-PCR, Gene Expression, DNA Methylation Assay, Expressing, Control
Figure Legend Snippet: (A) Gene Set Enrichment Analysis of CNOT3-regulated genes with respect to distinct components of the ESC program. The table expresses color-coded normalized enrichment scores (NES) and representative GSEA plots for modules increased (top), unaffected (center) or decreased (bottom) in expression in CNOT3-depleted HCT116 cells are shown. All listed NES values reflect significant (P <0.0001) enrichments. (B) Heatmaps of CNOT3-bound genes in the hypermethylated (top) and ESC (bottom) modules in HCT116 and Ca9, in relation to RAD21 (as a control) and MAX binding in HCT116 cells.
Techniques Used: Expressing, Control, Binding Assay
Figure Legend Snippet: (A) IHC for CNOT3 in representative CRC specimens with typical (<1% to 5% of stained cells) or high (>5% to 20% of stained cells) CNOT3+ cell fractions. Scale bar, 50 µm. (B) Association of high CNOT3+ cell fractions with increasing CRC stage. (C) Kaplan-Meier survival analysis of patients with CRC stages II and III (combined, left, N=307) or stage II only (right, N=237), showing reduced long-term disease-free survival in cases with excess CNOT3. (D) Multivariate analysis in stages II and III (combined) or in stage II CRC of the influence of various factors, including high CNOT3+ cell fraction, on patient survival. (E) Kaplan-Meier survival analysis of patients whose CRCs did (red) or did not (blue) overexpress TRIM28. (F) Kaplan-Meier survival analysis of 296 patients with microsatellite-stable (MSI-negative) tumors with low or high CNOT3 mRNA levels in CRC stages II and III from The Cancer Genome Atlas collection.
Techniques Used: Staining