Olson, Calla M. Liang, Yanke Leggett, Alan Park, Woojun D. Li, Lianbo Mills, Caitlin E. Elsarrag, Selma Z. Ficarro, Scott B. Zhang, Tinghu Duester, Robert Geyer, Matthias Sim, Taebo Marto, Jarrod A. Sorger, Peter K. Westover, Ken D. Lin, Charles Y. Kwiatkowski, Nicholas Gray, Nathanael S. 2024-01-19T20:01:01Z 2024-01-19T20:01:01Z 2022-01-25 2019-06 2451-9448 https://pubs.kist.re.kr/handle/201004/119905 Cyclin-dependent kinase 7 (CDK7) regulates both cell cycle and transcription, but its precise role remains elusive. We previously described THZ1, a CDK7 inhibitor, which dramatically inhibits superenhancer-associated gene expression. However, potent CDK12/13 off-target activity obscured CDK7s contribution to this phenotype. Here, we describe the discovery of a highly selective covalent CDK7 inhibitor. YKL-5-124 causes arrest at the G(1)/S transition and inhibition of E2F-driven gene expression; these effects are rescued by a CDK7 mutant unable to covalently engage YKL-5-124, demonstrating on-target specificity. Unlike THZ1, treatment with YKL-5-124 resulted in no change to RNA polymerase II C-terminal domain phosphorylation; however, inhibition could be reconstituted by combining YKL-5-124 and THZ531, a selective CDK12/13 inhibitor, revealing potential redundancies in CDK control of gene transcription. These findings highlight the importance of CDK7/12/13 polypharmacology for anti-cancer activity of THZ1 and posit that selective inhibition of CDK7 may be useful for treatment of cancers marked by E2F misregulation. English CELL PRESS Development of a Selective CDK7 Covalent Inhibitor Reveals Predominant Cell-Cycle Phenotype Article 10.1016/j.chembiol.2019.02.012 1 CELL CHEMICAL BIOLOGY, v.26, no.6, pp.792 - + CELL CHEMICAL BIOLOGY 26 6 792 + N scie scopus 000472159700003 2-s2.0-85066984722 Biochemistry & Molecular Biology Biochemistry & Molecular Biology Article RNA-POLYMERASE-II TERMINAL DOMAIN ACTIVATING KINASE GENE-EXPRESSION CANCER PHOSPHORYLATION PROGRESSION CTD IDENTIFICATION ASSOCIATION cancer cell cycle drug discovery gene expression small-molecule inhibitor transcription