Inhibition of transcription by the trimeric cyclin-dependent kinase 7 complex

Daniel A. Bochar, Zhen Qiang Pan, Ronald Knights, Robert P. Fisher, Ali Shilatifard, Ramin Shiekhattar

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Cyclin-dependent kinase 7 (CDK7) can be isolated as a subunit of a trimeric kinase complex functional in activation of the mitotic promoting factor. In this study, we demonstrate that the trimeric cdk-activating kinase (CAK) acts as a transcriptional repressor of class II promoters and show that repression results from CAK impeding the entry of RNA polymerase II and basal transcription factor IIF into a competent preinitiation complex. This repression is independent of CDK7 kinase activity. We find that the p36/MAT1 subunit of CAK is required for transcriptional repression and the repression is independent of the promoter used. Our results demonstrate a central role for CAK in regulation of messenger RNA synthesis by either inhibition of RNA polymerase II-catalyzed transcription or stimulation of transcription through association with basal transcription repair factor IIH.

Original languageEnglish (US)
Pages (from-to)13162-13166
Number of pages5
JournalJournal of Biological Chemistry
Volume274
Issue number19
DOIs
StatePublished - May 7 1999
Externally publishedYes

Fingerprint

Cyclin-Dependent Kinases
Transcription
RNA Polymerase II
Transcription Factor TFIIH
Phosphotransferases
Repair
Transcription Factors
Chemical activation
Association reactions
Messenger RNA
cyclin-dependent kinase-activating kinase

ASJC Scopus subject areas

  • Biochemistry

Cite this

Inhibition of transcription by the trimeric cyclin-dependent kinase 7 complex. / Bochar, Daniel A.; Pan, Zhen Qiang; Knights, Ronald; Fisher, Robert P.; Shilatifard, Ali; Shiekhattar, Ramin.

In: Journal of Biological Chemistry, Vol. 274, No. 19, 07.05.1999, p. 13162-13166.

Research output: Contribution to journalArticle

Bochar, Daniel A. ; Pan, Zhen Qiang ; Knights, Ronald ; Fisher, Robert P. ; Shilatifard, Ali ; Shiekhattar, Ramin. / Inhibition of transcription by the trimeric cyclin-dependent kinase 7 complex. In: Journal of Biological Chemistry. 1999 ; Vol. 274, No. 19. pp. 13162-13166.
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