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Growth-based Determination and Biochemical Confirmation of Genetic Requirements for Protein Degradation in Saccharomyces cerevisiae
10:57

Growth-based Determination and Biochemical Confirmation of Genetic Requirements for Protein Degradation in Saccharomyces cerevisiae

Published on: February 16, 2015

S. cerevisiae Vts1p induces deadenylation-dependent transcript degradation and interacts with the Ccr4p-Pop2p-Not

Laura M Rendl1, Melissa A Bieman, Craig A Smibert

  • 1Department of Biochemistry, University of Toronto, Toronto, Ontario M5S 1A8, Canada.

RNA (New York, N.Y.)
|May 13, 2008
PubMed

Insights

Vts1p protein triggers mRNA decay in yeast by recruiting the Ccr4p-Pop2p-Not deadenylase complex. This leads to deadenylation, decapping, and subsequent degradation of target transcripts, potentially involving P-bodies.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • RNA Metabolism

Background:

  • Smaug proteins are sequence-specific RNA-binding proteins regulating mRNA translation and degradation.
  • Vts1p, a Smaug family member, controls target transcript stability in Saccharomyces cerevisiae.

Purpose of the Study:

  • To elucidate the mechanism of Vts1p-mediated mRNA decay.
  • To investigate the role of the Ccr4p-Pop2p-Not complex in Vts1p-induced transcript degradation.

Main Methods:

  • Utilized in vivo RNA reporters to study Vts1p-mediated decay.
  • Investigated protein-protein interactions between Vts1p and the Ccr4p-Pop2p-Not complex.
  • Examined transcript degradation steps including deadenylation, decapping, and 5'-to-3' exonucleolytic decay.

Main Results:

  • Vts1p stimulates mRNA degradation via deadenylation mediated by the Ccr4p-Pop2p-Not complex.
  • Vts1p directly interacts with the Ccr4p-Pop2p-Not complex, suggesting recruitment.
  • Vts1p target transcripts undergo decapping and 5'-to-3' decay by Xrn1p, potentially within P-bodies.

Conclusions:

  • Vts1p recruits the Ccr4p-Pop2p-Not deadenylase complex to target mRNAs, initiating decay.
  • Smaug family proteins likely utilize a conserved mechanism involving Ccr4-Pop2-Not recruitment for transcript degradation.

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