Sbp1p Affects Translational Repression and Decapping in; Saccharomyces cerevisiae Journal Article uri icon



  • ABSTRACT; ; The relationship between translation and mRNA turnover is critical to the regulation of gene expression. One major pathway for mRNA turnover occurs by deadenylation, which leads to decapping and subsequent 5′-to-3′ degradation of the body of the mRNA. Prior to mRNA decapping, a transcript exits translation and enters P bodies to become a potential decapping substrate. To understand the transition from translation to decapping, it is important to identify the factors involved in this process. In this work, we identify Sbp1p (formerly known as Ssb1p), an abundant RNA binding protein, as a high-copy-number suppressor of a conditional allele in the decapping enzyme. Sbp1p overexpression restores normal decay rates in decapping-defective strains and increases P-body size and number. In addition, Sbp1p promotes translational repression of mRNA during glucose deprivation. Moreover, P-body formation is reduced in strains lacking Sbp1p. Sbp1p acts in conjunction with Dhh1p, as it is required for translational repression and P-body formation in; pat1; Δ strains under these conditions. These results identify Sbp1p as a new protein that functions in the transition of mRNAs from translation to an mRNP complex destined for decapping.;

publication date

  • July 1, 2006

Date in CU Experts

  • February 20, 2014 11:46 AM

Full Author List

  • Segal SP; Dunckley T; Parker R

author count

  • 3

Other Profiles

International Standard Serial Number (ISSN)

  • 0270-7306

Electronic International Standard Serial Number (EISSN)

  • 1098-5549

Additional Document Info

start page

  • 5120

end page

  • 5130


  • 26


  • 13