Journal: eLife
Article Title: SERBP1 interacts with PARP1 and is present in PARylation-dependent protein complexes regulating splicing, cell division, and ribosome biogenesis
doi: 10.7554/elife.98152
Figure Lengend Snippet: Figure 4. SERBP1 interacts with PARP1 and influences PARylation. (A) Results of IP-western in U251 cells with control and anti-SERBP1 antibodies confirm SERBP1 interaction with PARP1, NCL, and SYNCRIP. SERBP1 and PARP1 strong association is corroborated by their high expression correlation in different studies (B) and similar expression profiles during cortex development according to Cortecon (van de Leemput et al., 2014). (C). (D) PARylation sites observed in SERBP1 protein according to Gibson et al., 2016; Martello et al., 2016. (E) PARP1 ADP-ribosylates SERBP1 in vitro. Purified recombinant PARP1 (0.1 µM) and SERBP1 (0.6 µM) were combined in a reaction with or without sheared salmon sperm DNA (sssDNA) (100 ng/ µL) and NAD+ (100 µM) as indicated. The reaction products were analyzed by SDS-PAGE with silver staining (left) and Western blotting for PAR (right). Uncropped gels are shown. (F) Venn diagram shows that majority of SERBP1-associated factors get PARylated and/or bind PAR (Gibson et al., 2016; Martello et al., 2016; Dasovich et al., 2021). (G) Increase of PARylation levels in 293T and U251 GBM cells after H2O2 treatment. (H) SBP-SERBP1 and Flag-PARP1 were co-transfected into 293T cells. Cells were treated with H2O2 to induce PARylation and a pull-down experiment with streptavidin beads was performed. Western analysis showed increased SERBP1 association with PARP1 in cells treated with H2O2. SBP-SERBP1-His detected by His antibody; Flag-PARP1 detected by Flag antibody. (I) SBP-SERBP1 was transfected into 293T cells. Cells were treated with DMSO or 10 μM PJ34 (PARP inhibitor) for two hours and a pull-down experiment with streptavidin beads was performed. Western analysis showed a decrease in SERBP1 association with PARP1 and GPBP1. (J) SERBP1 transgenic expression (mGreen-SERBP1) in 293T cells increased the levels of PARylated proteins as indicated by PAR-detecting agent. Datasets used to prepare the figure, and detailed analyses are in Supplementary file 1, Supplementary file 5 and Supplementary file 6.
Article Snippet: DOI: https://doi.org/10.7554/eLife.98152 20 of 37 Reagent type (species) or resource Designation Source or reference Identifiers Additional information Recombinant DNA reagent mGreen- SERBP1 (plasmid) This paper SERBP1 ORF cloned in frame in pcDNA3.1- mGreenLantern backbone Recombinant DNA reagent Flag- PARP1 Addgene RRID:Addgene_111575 Peptide, recombinant protein 6xHis- tagged SERBP1 Baudin et al., 2021 Commercial assay or kit Lipofectamine RNAiMAX Invitrogen Cat#:13778150 Commercial assay or kit Streptavidin beads GE Healthcare Life Sciences Cat#:17- 5113- 01 Commercial assay or kit Cell Titer Glo 2.0 Promega Cat#:G9243 Commercial assay or kit Duolink PLA in Situ Red starter kit mouse/rabbit Sigma- Aldrich Cat#:DUO92101 Chemical compound, drug Cambridge Cancer Compound Library Selleck Chem Cat#:L2300 100 nM in 0.1% DMSO treatment concentration Chemical compound, drug Puromycin Sigma- Aldrich Cat#:P7255 Chemical compound, drug Paclitaxel Cayman Chem Cat#:10461 Chemical compound, drug PARP inhibitor PJ34 Enzo Cat#:ALX- 270–289 Software, algorithm Mascot v2.7.0 Matrix Science RRID:SCR_014322 Software, algorithm Scaffold v4.9.0 Proteome Software RRID:SCR_014321 Software, algorithm ImageJ FIJI NIH RRID:SCR_002285 Software, algorithm BioInfoRx https://bioinforx.com/ apps/venn.php Software, algorithm Nematode genome comparison browser http://nemates.org/MA/ progs/overlap_stats.html Software, algorithm ShinyGO v0.67 & v0.77 Ge et al., 2020 Software, algorithm Metascape v3.5 Zhou et al., 2019 Software, algorithm Panther v17.0 Thomas et al., 2022 Software, algorithm Revigo Supek et al., 2011 Software, algorithm STRING v11.5 Szklarczyk et al., 2023 Software, algorithm Cytoscape Doncheva et al., 2023 Software, algorithm R2 http://r2.amc.nl Software, algorithm dcGO Enrichment mining service Fang and Gough, 2013 Software, algorithm STAR v2.7.7.a Dobin et al., 2013 Software, algorithm rMATS v4.1.2 Shen et al., 2014 Software, algorithm rmats2sashimiplot tool https://github.com/ Xinglab/rmats2sashimiplot; Xinglab, 2024 Continued Continued on next page Breunig, Lei, Montalbano et al. eLife 2024;13:RP98152.
Techniques: Western Blot, Control, Expressing, In Vitro, Purification, Recombinant, SDS Page, Silver Staining, Transfection, Transgenic Assay