CUT&Tag for RNAPII-Ser2p or RNAPII-Ser5p in DIS3-depleted cells
Ontology highlight
ABSTRACT:
INSTRUMENT(S): NextSeq 2000
ORGANISM(S): Homo sapiens
SUBMITTER: Neus Visa
PROVIDER: E-MTAB-16280 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:CUT&Tag was performed to identify the effect of DIS3 depletion on DNA:RNA hybrids genome-wide. DIS3-AID HCT116 cells were treated with either Auxin (for rapid depletion of DIS3) or DMSO (control). CUT&Tag was performed targeting DNA:RNA hybrids using the CUT&Tag-IT® R-loop Assay Kit (Active Motive) with the S9.6 antibody.
2026-08-03 | E-MTAB-17179 | biostudies-arrayexpress
Project description:LORAX-seq (Yang et al, DOI:https://doi.org/10.1016/j.molcel.2024.01.019) was used to identify the backtracked RNA in DIS3-depleted HCT116 DIS3-AID cells. Briefly, LORAX-seq was performed according to Yang et al. (2024) with following modifications. The Pol II complexes were immunoprecipitated with α‐Rpb1 CTD (ab5408, Abcam), followed by capture using a mixture of Dynabeads Protein-A and G. The magnetic beads were treated with recombinant Human TCEA1 protein (ab204205, Abcam) as per Yang et al. (2024), followed by isolation of eluted RNA using TRIZOL (Invitrogen). RNA was prepared for sequencing using the NEBNext Low-bias Small RNA library prep kit (NEB). The eluted RNA was mixed with QIAseq miRNA Library QC Spike-in (331535, Qiagen) as per manufacturer’s instructions. Sequencing libraries were visualized using an Agilent 2100 Tapestation and sequencing was done using the NextSeq 1000/2000 P2 cartridge (Illumina). We identified longer backtracked RNAs in DIS3-depleted cells than in control cells.
2026-08-03 | E-MTAB-16220 | biostudies-arrayexpress
Project description:Transcripts produced by RNA polymerase II (RNAPII) are fundamental for cellular responses to environmental changes. It is therefore no surprise that there exist multiple avenues for the regulation of this process. To explore the regulation mediated by RNAPII-interacting proteins, we used an siRNA-based screen to systematically evaluate their influence on RNA synthesis. We identified several proteins that strongly affected RNAPII activity. We evaluated one of the top hits, SCAF1, using an auxin-inducible degradation system and sequencing approaches. In agreement with our screen results, acute depletion of SCAF1 decreased RNA synthesis, and showed an increase of Serine-2 phosphorylated-RNAPII (pS2-RNAPII). We found that the accumulation of pS2-RNAPII within the gene body occurred at GC-rich regions and was indicative of stalled RNAPII complexes. The accumulation of stalled RNAPII complexes was accompanied by reduced recruitment of initiating RNAPII, explaining the observed global decrease in transcriptional output. Furthermore, upon SCAF1 depletion, RNAPII complexes showed increased association with components of the proteasomal-degradation machinery. We concluded that in cells lacking SCAF1, RNAPII undergoes a rather interrupted passage, resulting in intervention by the proteasomal-degradation machinery to clear stalled RNAPII. While cells survive the compromised transcription caused by absence of SCAF1, further inhibition of proteasomal-degradation machinery, is synthetically lethal.
2024-12-20 | PXD054675 | Pride
Project description:It is well established that exposure to UV light alters the distribution of RNA polymerase II (RNAPII), but the impact of UV irradiation on the genomic distribution of DIS3 has not been investigated. We generated ChIP-seq profiles of DIS3 in U2OS cells that express a HA-tagged DIS3 protein (DIS3FLAGHA). We analyzed the total occupancy of RNAPII using an antibody against the N-terminal domain of RPB1 (NTD). Average RNAPII occupancy at transcription start sites (TSSs) was significantly decrease 3 hours after UV irradiation, consistent with previous reports, and was notably recovered 8 hours after irradiation. Upon UV irradiation, DIS3 exhibited a redistribution that closely aligned with the changes observed in RNAPII. This similarity, was particularly pronounced in highly expressed genes. Our results suggests that DIS3 is associated with the transcription machinery and can act locally at the transcription site during elongation.
2026-08-02 | GSE295184 | GEO
Project description:CUT&Tag for RNAPII-Ser2p or RNAPII-Ser5p in DIS3-depleted cells
| PRJEB104274 | ENA
Project description:TNFα-stimulated gene 6 (TSG-6) is an anti-inflammatory protein. In human epidermis, TSG-6 is secreted in extracellular matrix where it interacts with hyaluronan (HA). However, their functions are not well understood. In this study, immortalized N/TERT keratinocytes were edited by CRISPR/Cas9, used to reconstruct in vitro epidermis (RHE) and stimulated or not with interleukins 4 and 13 for 48h to mimic atopic dermatitis (AD). Two TSG-6-/- clones (respectively TSG-6-/- (a) and TSG-6-/- (b)) harboring major deletions in both alleles were selected and compared to TSG-6+/+ cells. Epidermis reconstructed from TSG-6-/- (a) and TSG-6-/- (b) exhibit normal differentiation process and morphology but show an increased HA leakage in the underlying culture medium of both TSG-6-/- RHE compared to TSG-6+/+ tissues, especially in conditions that mimic AD. While IL-4/13 treatment of RHE induces regulation of genes associated with AD, the absence of TSG-6 don’t seem to show any major transcriptomic regulation.
2021-12-30 | E-MTAB-10095 | biostudies-arrayexpress
Project description:Trimethylation of histone H3 lysine 4 (H3K4me3) is associated with transcriptional start sites and proposed to regulate transcription initiation. However, redundant functions of the H3K4 SET1/COMPASS methyltransferase complexes complicate elucidation of the specific role of H3K4me3 in transcriptional regulation. Here, we show that acute ablation of shared subunits of the SET1/COMPASS complexes leads to complete loss of all H3K4 methylation. H3K4me3 turnover occurs more rapidly than H3K4me1 and H3K4me2 and is dependent on KDM5 demethylases. Surprisingly, acute loss of H3K4me3 does not have detectable effects on transcriptional initiation but leads to a widespread decrease in transcriptional output, an increase in RNA polymerase II (RNAPII) pausing and slower elongation. Our study demonstrates a distinct role for H3K4me3 in transcriptional pause-release and elongation rather than transcriptional initiation.
2023-03-14 | PXD028858 | Pride
Project description:The C-terminal domain (CTD) of the RNA polymerase II (RNAPII) subunit POLR2A is a platform for modifications specifying the recruitment of factors that regulate transcription, mRNA processing, and chromatin remodeling. Here, we show that a CTD arginine residue (R1810 in human) that is conserved across vertebrates is symmetrically dimethylated (me2s). This R1810me2s modification requires Protein Arginine Methyltransferase 5 (PRMT5) and recruits the Tudor domain of the Survival of Motor Neuron (SMN) protein, which is mutated in spinal muscular atrophy (SMA). SMN interacts with Senataxin, which is sometimes mutated in Ataxia Oculomotor Apraxia 2 (AOA2) and Amyotrophic Lateral Sclerosis (ALS4). Because R1810me2s and SMN, like Senataxin, are required for resolving RNA-DNA hybrids, created by RNA polymerase II, that form â??R-loopsâ?? in transcription termination regions, we propose that R1810me2s, SMN, and Senataxin are components of a pathway for R-loop resolution in which defects can influence transcription termination and may contribute to neurodegenerative disorders. ChIP of RNAPII in Raji cells expressing shRNG against SMN or GFP; ChIP against RNAPII in Raji cells where endogenous RNAPII has been replaced with wt or R1810A mutant amanitin-resistant protein; and ChIP of SMN in HEK293 cells.
2015-12-31 | E-GEOD-73379 | biostudies-arrayexpress
Project description:Cells employ transcription-coupled repair (TCR) to eliminate transcription-blocking DNA lesions. DNA damage-induced binding of the TCR-specific repair factor CSB to RNA polymerase II (RNAPII) triggers RNAPII ubiquitylation at a single lysine (K1268) by the CRL4CSA ubiquitin ligase. How CRL4CSA is specifically directed toward the K1268 site is unknown. Here, we identify ELOF1 as the missing link that facilitates RNAPII ubiquitylation, a key signal for the assembly of downstream repair factors. This function requires its constitutive interaction with RNAPII close to the K1268 site, revealing ELOF1 as a specificity factor that interacts with and positions CRL4CSA for optimal RNAPII ubiquitylation. Drug-genetic interaction screening also reveals a CSB-independent compensatory pathway in which ELOF1 protects cells against DNA replication stress by preventing DNA damage-induced R-loops. Our study offers key insights into the molecular mechanisms of TCR and provides a genetic framework of the interplay between the transcriptional stress response and DNA replication.
2021-04-21 | PXD024051 | Pride
Project description:The coordinated transcription of genes involves RNA polymerase II enzymes (RNAPII), which pull DNA through their active sites. DNA lesions in transcribed strands block RNAPII elongation and induce a strong transcriptional arrest. The transcription-coupled repair (TCR) pathway ensures the efficient removal of transcription-blocking DNA lesions, but this is not sufficient to overcome this arrest and resume transcription. Through proteomics screens, we find that the TCR-specific CSB protein loads the evolutionary conserved PAF1 complex (PAF1C) onto RNAPII in promoter-proximal regions specifically in response to DNA damage. PAF1C is dispensable for TCR-mediated repair,but is essential to resume RNA synthesis after UV irradiation, suggesting an unexpected uncoupling between DNA repair and transcription restart. Moreover, we find that PAF1C promotes RNAPII pause release in promoter-proximal regions and subsequently acts as a processivity factor that stimulates transcription elongation waves throughout genes. Our findings expose the molecular basis for a non-canonical PAF1C-dependent pathway that restores transcription throughout the human genome after genotoxic stress.
2021-02-28 | PXD016198 | Pride