Translational control by RGS2

Chau Hoang Nguyen, Hong Ming, Peishen Zhao, Lynne Hugendubler, Robert Gros, Scot R Kimball, Peter Chidiac

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)

Abstract

The regulator of G protein signaling (RGS) proteins are a family of guanosine triphosphatase (GTPase)-accelerating proteins. We have discovered a novel function for RGS2 in the control of protein synthesis. RGS2 was found to bind to eIF2Be (eukaryotic initiation factor 2B e subunit) and inhibit the translation of messenger RNA (mRNA) into new protein. This effect was not observed for other RGS proteins tested. This novel function of RGS2 is distinct from its ability to regulate G protein-mediated signals and maps to a stretch of 37 amino acid residues within its conserved RGS domain. Moreover, RGS2 was capable of interfering with the eIF2-eIF2B GTPase cycle, which is a requisite step for the initiation of mRNA translation. Collectively, this study has identified a novel role for RGS2 in the control of protein synthesis that is independent of its established RGS domain function.
Original languageEnglish
Pages (from-to)755 - 765
Number of pages11
JournalJournal of Cell Biology
Volume186
Issue number5
DOIs
Publication statusPublished - 2009
Externally publishedYes

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