Ser7 phosphorylation of the CTD recruits the RPAP2 Ser5 phosphatase to snRNA genes.
Ser7 phosphorylation of the CTD recruits the RPAP2 Ser5 phosphatase to snRNA genes.
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DOI:
10.1016/j.molcel.2011.11.006
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发表时间:
2012-01-13
期刊:
影响因子:
16
通讯作者:
Murphy, Shona
中科院分区:
文献类型:
--
作者:
Egloff, Sylvain;Zaborowska, Justyna;Laitem, Clelia;Kiss, Tames;Murphy, Shona
The carboxy-terminal domain (CTD) of the large subunit of RNA polymerase II (Pol II) comprises multiple heptapeptide repeats of the consensus Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7. Reversible phosphorylation of Ser2, Ser5, and Ser7 during the transcription cycle mediates the sequential recruitment of transcription/RNA processing factors. Phosphorylation of Ser7 is required for recruitment of the gene type-specific Integrator complex to the Pol II-transcribed small nuclear (sn)RNA genes. Here, we show that RNA Pol II-associated protein 2 (RPAP2) specifically recognizes the phospho-Ser7 mark on the Pol II CTD and also interacts with Integrator subunits. siRNA-mediated knockdown of RPAP2 and mutation of Ser7 to alanine cause similar defects in snRNA gene expression. In addition, we show that RPAP2 is a CTD Ser5 phosphatase. Taken together, our results indicate that during transcription of snRNA genes, Ser7 phosphorylation facilitates recruitment of RPAP2, which in turn both recruits Integrator and dephosphorylates Ser5. ► RPAP2 interacts both with Pol II and the snRNA gene-specific Integrator complex ► RPAP2 recognizes the Ser7P mark on the Pol II CTD ► RPAP2 is required for expression of snRNA and protein-coding genes ► RPAP2 is a Ser5P-specific CTD phosphatase
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影响因子:
4.8
作者:
Boeing, Stefan;Rigault, Caroline;Meisterernst, Michael
通讯作者:
Meisterernst, Michael
DOI:
10.1073/pnas.0912599106
发表时间:
2010-02-09
影响因子:
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Qin, Jun
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Murphy, Shona
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4.8
作者:
Egloff, Sylvain;Szczepaniak, Sylwia Anna;Murphy, Shona
通讯作者:
Murphy, Shona
影响因子:
16
作者:
Buratowski S
通讯作者:
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