The human PAF1 complex acts in chromatin transcription elongation both independently and cooperatively with SII/TFIIS.
The human PAF1 complex acts in chromatin transcription elongation both independently and cooperatively with SII/TFIIS.
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DOI:
10.1016/j.cell.2009.12.050
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发表时间:
2010-02-19
期刊:
影响因子:
64.5
通讯作者:
Roeder RG
中科院分区:
文献类型:
--
作者:
Kim J;Guermah M;Roeder RG
Genetic and cell-based studies have implicated the PAF1 complex (PAF1C) in transcription-associated events, but there has been no evidence showing a direct role in facilitating transcription of a natural chromatin template. Here, we demonstrate an intrinsic ability of human PAF1C (hPAF1C) to facilitate activator (p53)- and histone acetyltransferase (p300)-dependent transcription elongation from a recombinant chromatin template in a biochemically defined RNA polymerase II transcription system. This represents a PAF1C function distinct from its established role in histone ubiquitylation and methylation. Importantly, we further demonstrate a strong synergy between hPAF1C and elongation factor SII/TFIIS and an underlying mechanism involving direct hPAF1C-SII interactions and cooperative binding to RNA polymerase II. Apart from a distinct PAF1C function, the present observations provide a molecular mechanism for the cooperative function of distinct transcription elongation factors in chromatin transcription.
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