CYCLINg through transcription: posttranslational modifications of P-TEFb regulate transcription elongation.
CYCLINg through transcription: posttranslational modifications of P-TEFb regulate transcription elongation.
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DOI:
10.4161/cc.9.9.11346
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发表时间:
2010-05
期刊:
影响因子:
--
通讯作者:
Ott M
中科院分区:
文献类型:
--
作者:
Cho S;Schroeder S;Ott M
The cyclin T/CDK9 complex, also called positive transcription elongation factor b (P-TEFb) phosphorylates the C-terminal domain of the large fragment of the RNA polymerase II. This action is a hallmark of the transition from transcription initiation to elongation. P-TEFb is itself modified by phosphorylation and ubiquitination. Recently, the core components of P-TEFb, cyclin T1 and CDK9, were identified as novel substrates of histone acetyltransferases. Here, we review how posttranslational modifications regulate the activity of the P-TEFb complex and discuss how acetylation of the complex optimizes transcription elongation in the context of other posttranslational modifications.
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