Ars2 Promotes Proper Replication-dependent Histone MRNA 3' End Formation

Overview

Journal Mol Cell

Publisher Cell Press

Specialty Cell Biology

Date 2012 Jan 17

PMID 22244333

Citations 54

Authors

Joshua J Gruber

Scott H Olejniczak

Jeongsik Yong

Gaspare La Rocca

Gideon Dreyfuss

Craig B Thompson

Affiliations

Soon will be listed here.

Abstract

Ars2 is a component of the nuclear cap-binding complex that contributes to microRNA biogenesis and is required for cellular proliferation. Here, we expand on the repertoire of Ars2-dependent microRNAs and determine that Ars2 regulates a number of mRNAs, the largest defined subset of which code for histones. Histone mRNAs are unique among mammalian mRNAs because they are not normally polyadenylated but, rather, are cleaved following a 3' stem loop. A significant reduction in correctly processed histone mRNAs was observed following Ars2 depletion, concurrent with an increase in polyadenylated histone transcripts. Furthermore, Ars2 physically associated with histone mRNAs and the noncoding RNA 7SK. Knockdown of 7SK led to an enhanced ratio of cleaved to polyadenylated histone transcripts, an effect dependent on Ars2. Together, the data demonstrate that Ars2 contributes to histone mRNA 3' end formation and expression and these functional properties of Ars2 are negatively regulated by interaction with 7SK RNA.

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