Molecular and Cellular Biochemistry

, 333:99

Acetyl-coenzyme A synthetase 2 is a nuclear protein required for replicative longevity in Saccharomyces cerevisiae

  • Alaric A. Falcón
  • Shaoping Chen
  • Michael S. Wood
  • John P. Aris
Article

DOI: 10.1007/s11010-009-0209-z

Cite this article as:
Falcón, A.A., Chen, S., Wood, M.S. et al. Mol Cell Biochem (2010) 333: 99. doi:10.1007/s11010-009-0209-z

Abstract

Acs2p is one of two acetyl-coenzyme A synthetases in Saccharomyces cerevisiae. We have prepared and characterized a monoclonal antibody specific for Acs2p and find that Acs2p is localized primarily to the nucleus, including the nucleolus, with a minor amount in the cytosol. We find that Acs2p is required for replicative longevity: an acs2∆ strain has a reduced replicative life span compared to wild-type and acs1∆ strains. Furthermore, replicatively aged acs2∆ cells contain elevated levels of extrachromosomal rDNA circles, and silencing at the rDNA locus is impaired in an acs2∆ strain. These findings indicate that Acs2p-mediated synthesis of acetyl-CoA in the nucleus functions to promote rDNA silencing and replicative longevity in yeast.

Keywords

Acetyl-coenzyme AAgingNucleusSaccharomyces cerevisiae

Supplementary material

11010_2009_209_MOESM1_ESM.pdf (314 kb)
Supplementary material 1 (PDF 314 kb)

Copyright information

© Springer Science+Business Media, LLC. 2009

Authors and Affiliations

  • Alaric A. Falcón
    • 1
    • 2
  • Shaoping Chen
    • 1
  • Michael S. Wood
    • 1
  • John P. Aris
    • 1
  1. 1.Department of Anatomy and Cell Biology, Health Science CenterUniversity of FloridaGainesvilleUSA
  2. 2.Department of Nutritional Sciences and ToxicologyUniversity of CaliforniaBerkeleyUSA