Integrator Recruits Protein Phosphatase 2A to Prevent Pause Release and Facilitate Transcription Termination.
Integrator Recruits Protein Phosphatase 2A to Prevent Pause Release and Facilitate Transcription Termination.
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DOI:
10.1016/j.molcel.2020.08.016
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发表时间:
2020-10-15
期刊:
影响因子:
16
通讯作者:
Wagner EJ
中科院分区:
文献类型:
--
作者:
Huang KL;Jee D;Stein CB;Elrod ND;Henriques T;Mascibroda LG;Baillat D;Russell WK;Adelman K;Wagner EJ
Efficient release of promoter-proximally paused Pol II into productive elongation is essential for gene expression. Recently, we reported that the Integrator complex can bind paused Pol II and drive premature transcription termination, potently attenuating the activity of target genes. Premature termination requires RNA cleavage by the endonuclease subunit of Integrator, but the roles of other Integrator subunits in gene regulation have yet to be elucidated. Here, we report that Integrator subunit 8 (IntS8) is critical for transcription repression and is required for association with Protein Phosphatase 2A (PP2A). We find that Integrator-bound PP2A dephosphorylates the Pol II C-terminal domain and Spt5 and prevents the transition to productive elongation. Blocking PP2A association with Integrator thus stimulates pause release and gene activation. These results reveal a second catalytic function associated with Integrator-mediated transcription termination and suggest a model for the control of productive elongation involving active competition between transcriptional kinases and phosphatases. The Integrator Complex binds promoter-proximally paused Pol II and drives premature transcription termination. Huang et al. identified a motif within Integrator subunit 8 (INTS8) that recruits Protein Phosphatase 2A (PP2A) to Pol II. Integrator-PP2A then dephosphorylates residues within Spt5 and the Pol II CTD to inhibit pause release and facilitate termination.
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影响因子:
10.5
作者:
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通讯作者:
West S
影响因子:
64.8
作者:
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影响因子:
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DOI:
10.1038/s41580-018-0028-8
发表时间:
2018-10
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
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通讯作者:
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影响因子:
14.9
作者:
Albrecht TR;Shevtsov SP;Wu Y;Mascibroda LG;Peart NJ;Huang KL;Sawyer IA;Tong L;Dundr M;Wagner EJ
通讯作者:
Wagner EJ