Selective inhibition of CDK7 reveals high-confidence targets and new models for TFIIH function in transcription
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ABSTRACT:
PROVIDER: PRJNA636988 | ENA |
REPOSITORIES: ENA
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Project description:CDK7 associates with the 10-subunit TFIIH complex and regulates transcription by phosphorylating the C-terminal domain (CTD) of RNA polymerase II (RNAPII). Few additional CDK7 substrates are known. Here, using the covalent inhibitor SY-351 and quantitative phosphoproteomics, we identified CDK7 kinase substrates in human cells. Among hundreds of high-confidence targets, the vast majority are unique to CDK7 (i.e. distinct from other transcription-associated kinases), with a subset that suggest novel cellular functions. Transcription-associated factors were predominant CDK7 substrates, including SF3B1, U2AF2, and other splicing components. Accordingly, widespread and diverse splicing defects, such as alternative exon inclusion and intron retention, were characterized in CDK7-inhibited cells. Combined with biochemical assays, we establish that CDK7 directly activates other transcription-associated kinases CDK9, CDK12, and CDK13, invoking a “master regulator” role in transcription. We further demonstrate that TFIIH restricts CDK7 kinase function to the RNAPII CTD, whereas other substrates (e.g. SPT5, SF3B1) are phosphorylated by the 3-subunit CDK-activating kinase (CAK; CCNH, MAT1, CDK7). These results suggest new models for CDK7 function in transcription and implicate CAK dissociation from TFIIH as essential for kinase activation. This straightforward regulatory strategy ensures CDK7 activation is spatially and temporally linked to transcription, and may apply toward other transcription-associated kinases.
2020-10-31 | GSE151699 | GEO
Project description:CDK7 associates with the 10-subunit TFIIH complex and regulates transcription by phosphorylating the C-terminal domain (CTD) of RNA polymerase II (RNAPII). Few additional CDK7 substrates are known. Here, using the covalent inhibitor SY-351 and quantitative phosphoproteomics, we identified CDK7 kinase substrates in human cells. Among hundreds of high-confidence targets, the vast majority are unique to CDK7 (i.e., distinct from other transcription-associated kinases), with a subset that suggest novel cellular functions. Transcription-associated factors were predominant CDK7 substrates, including SF3B1, U2AF2, and other splicing components. Accordingly, widespread and diverse splicing defects, such as alternative exon inclusion and intron retention, were characterized in CDK7-inhibited cells. Combined with biochemical assays, we establish that CDK7 directly activates other transcription-associated kinases CDK9, CDK12, and CDK13, invoking a "master regulator" role in transcription. We further demonstrate that TFIIH restricts CDK7 kinase function to the RNAPII CTD, whereas other substrates (e.g., SPT5 and SF3B1) are phosphorylated by the three-subunit CDK-activating kinase (CAK; CCNH, MAT1, and CDK7). These results suggest new models for CDK7 function in transcription and implicate CAK dissociation from TFIIH as essential for kinase activation. This straightforward regulatory strategy ensures CDK7 activation is spatially and temporally linked to transcription, and may apply toward other transcription-associated kinases.
| S-EPMC7608751 | biostudies-literature
Project description:CDK7 phosphorylates the RNA polymerase II (pol II) CTD and activates the P-TEFb- associated kinase, CDK9, but its regulatory roles remain obscure. Using human CDK7 analog-sensitive (CDK7as) cells, we observed reduced capping enzyme recruitment, increased pol II promoter-proximal pausing, and defective termination at gene 3'-ends upon CDK7 inhibition. We also found that CDK7 regulates chromatin modifications downstream of transcription start sites. H3K4me3 spreading was restricted at gene 5'-ends and H3K36me3 was displaced toward gene 3'-ends in CDK7as cells. Together, these results implicate a CDK7-dependent "CTD code" that regulates epigenetic marks in addition to RNA processing and pol II pausing.
2017-08-01 | GSE100040 | GEO
Project description:Cyclin dependent kinases (CDKs) are high value therapeutical targets owing to their important roles in regulating transcription and the cell cycle — two pathways commonly altered in cancer and especially in multiple myeloma (MM). Among CDKs, CDK7 uniquely bridges cell cycle and transcriptional control by activating other cell cycle CDKs and forming the general transcription factor TFIIH. Utilizing a recently developed highly selective covalent inhibitor of CDK7, we demonstrate that CDK7 inhibition elicits a strong therapeutic response in MM blocking proliferation in vitro and driving tumor regression and prolonged survival in vivo. CDK7 inhibition counteracts molecular hallmarks of deregulated cell cycle control at the G1/S checkpoint. Additionally, we show CDK7 inhibition selectively downregulates oncogenic E2F and cell cycle gene expression programs. Combination treatment with JQ1 which target oncogenic enhancer driven gene expression programs proved highly synergistic. These results support CDK7 as an attractive and therapeutically actionable molecular vulnerability in MM. Cell count normalized RNA-seq in Resistant MM cell lines (XG1 and AMO1; 18 total samples; 3 technical replicates) upon treatment with the selective covalent CDK7 inhibitor YKL-5-124 Mariateresa,Fulciniti Nikhil,Munshi
2022-04-01 | GSE172442 | GEO
Project description:Cyclin dependent kinases (CDKs) are high value therapeutical targets owing to their important roles in regulating transcription and the cell cycle — two pathways commonly altered in cancer and especially in multiple myeloma (MM). Among CDKs, CDK7 uniquely bridges cell cycle and transcriptional control by activating other cell cycle CDKs and forming the general transcription factor TFIIH. Utilizing a recently developed highly selective covalent inhibitor of CDK7, we demonstrate that CDK7 inhibition elicits a strong therapeutic response in MM blocking proliferation in vitro and driving tumor regression and prolonged survival in vivo. CDK7 inhibition counteracts molecular hallmarks of deregulated cell cycle control at the G1/S checkpoint. Additionally, we show CDK7 inhibition selectively downregulates oncogenic E2F and cell cycle gene expression programs. Combination treatment with JQ1 which target oncogenic enhancer driven gene expression programs proved highly synergistic. These results support CDK7 as an attractive and therapeutically actionable molecular vulnerability in MM. Cell count normalized RNA-seq in Sensitive MM cell lines (H929 and MM1S; 24 total samples; 3 technical replicates) upon treatment with the selective covalent CDK7 inhibitor YKL-5-124 Mariateresa,Fulciniti Nikhil,Munshi
2022-04-01 | GSE172444 | GEO
Project description:Cyclin dependent kinases (CDKs) are high value therapeutical targets owing to their important roles in regulating transcription and the cell cycle — two pathways commonly altered in cancer and especially in multiple myeloma (MM). Among CDKs, CDK7 uniquely bridges cell cycle and transcriptional control by activating other cell cycle CDKs and forming the general transcription factor TFIIH. Utilizing a recently developed highly selective covalent inhibitor of CDK7, we demonstrate that CDK7 inhibition elicits a strong therapeutic response in MM blocking proliferation in vitro and driving tumor regression and prolonged survival in vivo. CDK7 inhibition counteracts molecular hallmarks of deregulated cell cycle control at the G1/S checkpoint. Additionally, we show CDK7 inhibition selectively downregulates oncogenic E2F and cell cycle gene expression programs. Combination treatment with JQ1 which target oncogenic enhancer driven gene expression programs proved highly synergistic. These results support CDK7 as an attractive and therapeutically actionable molecular vulnerability in MM. Cell count normalized RNA-seq in Resistant MM cell lines (XG1 and AMO1; 18 total samples; 3 technical replicates) upon treatment with the selective covalent CDK7 inhibitor YKL-5-124 Mariateresa,Fulciniti Nikhil,Munshi
2022-04-01 | GSE172443 | GEO
Project description:Cyclin-dependent kinase 7 (CDK7), part of the general transcription factor TFIIH, promotes gene transcription by phosphorylating the C-terminal domain of RNA polymerase II (RNA Pol II). Here, we combine rapid CDK7 kinase inhibition with multi-omics analysis to unravel the direct functions of CDK7 in human cells. CDK7 inhibition causes RNA Pol II retention at promoters, leading to decreased RNA Pol II initiation and immediate global downregulation of transcript synthesis. Elongation, termination, and recruitment of co-transcriptional factors are not directly affected. Although RNA Pol II, initiation factors, and Mediator accumulate at promoters, RNA Pol II complexes can also proceed into gene bodies without promoter-proximal pausing while retaining initiation factors and Mediator. Further downstream, RNA Pol II phosphorylation increases and initiation factors and Mediator are released, allowing recruitment of elongation factors and an increase in RNA Pol II elongation velocity. Collectively, CDK7 kinase activity promotes the release of initiation factors and Mediator from RNA Pol II, facilitating RNA Pol II escape from the promoter.
2024-05-31 | PXD037842 | Pride
Project description:Selective inhibition of CDK7 reveals the influence of CDK7 on psoriatic CD4+ T cells
| PRJNA720557 | ENA
Project description:Affinity Purification and Mass Spectrometry (AP-MS) using the phosphorylated RNAPII C-terminal domain (CTD) identified the capping enzyme and the H3K4 methyltransferase complex SETD1A/B. Subsequent inhibition of CDK7 revealed displaced H3K4me3 marks at the 3'-end of genes.
2017-05-10 | MSV000081069 | MassIVE
Project description:CDK7 is a cycline-dependent kinase part of the basal transcription factor TFIIH involved in the formation of the pre-inithiation complex of RNApol II dependent-genes. Despite it's well known genomic localization at the level of gene's promoter, it has been recently observed from Kwiatkowski et al., (2014) that CDK7 can be found also in large clusters of gene regulatory elements called Super-enhancers (SEs) of both normal and cancer cells. Here we report that CDK7 is resembling such distribution in a human melanoma context, in particular at the level of genes important in melanoma physiology such as the master transcription factors MITF and SOX10 which indeed, following the inhibition of CDK7 with the molecule THZ1, are rapidly downregulated at very low nanomolar concentration.
2020-09-18 | GSE158118 | GEO