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Article: Inhibition of P-TEFb (CDK9/cyclin T) kinase and RNA polymerase II transcription by the coordinated actions of HEXIM1 and 7SK snRNA

TitleInhibition of P-TEFb (CDK9/cyclin T) kinase and RNA polymerase II transcription by the coordinated actions of HEXIM1 and 7SK snRNA
Authors
Issue Date2003
Citation
Molecular Cell, 2003, v. 12, n. 4, p. 971-982 How to Cite?
AbstractThe positive transcriptional elongation factor b (P-TEFb), consisting of CDK9 and cyclin T, stimulates transcription by phosphorylating RNA polymerase II. It becomes inactivated when associated with the abundant 7SK snRNA. Here, we show that the 7SK binding alone was not sufficient to inhibit P-TEFb. P-TEFb was inhibited by the HEXIM1 protein in a process that specifically required 7SK for mediating the HEXIM1:P-TEFb interaction. This allowed HEXIM1 to inhibit transcription both in vivo and in vitro. P-TEFb dissociated from HEXIM1 and 7SK in cells undergoing stress response, increasing the level of active P-TEFb for stress-induced transcription. P-TEFb was the predominant HEXIM1-associated protein factor, and thus likely to be the principal target of inhibition coordinated by HEXIM1 and 7SK. Since HEXIM1 expression is induced in cells treated with hexamethylene bisacetamide, a potent inducer of cell differentiation, targeting the general transcription factor P-TEFb by HEXIM1/ 7SK may contribute to the global control of cell growth and differentiation.
Persistent Identifierhttp://hdl.handle.net/10722/323775
ISSN
2023 Impact Factor: 14.5
2023 SCImago Journal Rankings: 9.332
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYik, Jasper H.N.-
dc.contributor.authorChen, Ruichuan-
dc.contributor.authorNishimura, Rieko-
dc.contributor.authorJennings, Jennifer L.-
dc.contributor.authorLink, Andrew J.-
dc.contributor.authorZhou, Qiang-
dc.date.accessioned2023-01-13T02:59:15Z-
dc.date.available2023-01-13T02:59:15Z-
dc.date.issued2003-
dc.identifier.citationMolecular Cell, 2003, v. 12, n. 4, p. 971-982-
dc.identifier.issn1097-2765-
dc.identifier.urihttp://hdl.handle.net/10722/323775-
dc.description.abstractThe positive transcriptional elongation factor b (P-TEFb), consisting of CDK9 and cyclin T, stimulates transcription by phosphorylating RNA polymerase II. It becomes inactivated when associated with the abundant 7SK snRNA. Here, we show that the 7SK binding alone was not sufficient to inhibit P-TEFb. P-TEFb was inhibited by the HEXIM1 protein in a process that specifically required 7SK for mediating the HEXIM1:P-TEFb interaction. This allowed HEXIM1 to inhibit transcription both in vivo and in vitro. P-TEFb dissociated from HEXIM1 and 7SK in cells undergoing stress response, increasing the level of active P-TEFb for stress-induced transcription. P-TEFb was the predominant HEXIM1-associated protein factor, and thus likely to be the principal target of inhibition coordinated by HEXIM1 and 7SK. Since HEXIM1 expression is induced in cells treated with hexamethylene bisacetamide, a potent inducer of cell differentiation, targeting the general transcription factor P-TEFb by HEXIM1/ 7SK may contribute to the global control of cell growth and differentiation.-
dc.languageeng-
dc.relation.ispartofMolecular Cell-
dc.titleInhibition of P-TEFb (CDK9/cyclin T) kinase and RNA polymerase II transcription by the coordinated actions of HEXIM1 and 7SK snRNA-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S1097-2765(03)00388-5-
dc.identifier.pmid14580347-
dc.identifier.scopuseid_2-s2.0-0242361319-
dc.identifier.volume12-
dc.identifier.issue4-
dc.identifier.spage971-
dc.identifier.epage982-
dc.identifier.isiWOS:000186196100020-

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