Journal
BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS
Volume 1804, Issue 8, Pages 1567-1575Publisher
ELSEVIER
DOI: 10.1016/j.bbapap.2009.09.030
Keywords
Sir2; NAD(+); Calorie restriction; Longevity regulation; Aging
Categories
Funding
- National Institute on Aging [RO1-AG24351]
Ask authors/readers for more resources
The Sir2 family proteins (sirtuins) are evolutionally conserved NAD(+) (nicotinamide adenine dinucleotide)dependent protein deacetylases and ADP-ribosylases, which have been shown to play important roles in the regulation of stress response, gene transcription, cellular metabolism and longevity. Recent studies have also suggested that sirtuins are downstream targets of calorie restriction (CR), which mediate CR-induced beneficial effects including life span extension in an NAD(+)-dependent manner. CR extends life span in many species and has been shown to ameliorate many age-associated disorders such as diabetes and cancers. Understanding the mechanisms of CR as well as the regulation of sirtuins will therefore provide insights into the molecular basis of these age-associated metabolic diseases. This review focuses on discussing advances in studies of sirtuins and NAD(+) metabolism in genetically tractable model system, the budding yeast Saccharomyces cerevisiae. These studies have unraveled key metabolic longevity factors in the CR signaling and NAD(+) biosynthesis pathways, which may also contribute to the regulation of sirtuin activity. Many components of the NAD(+) biosynthesis pathway and CR signaling pathway are conserved in yeast and higher eukaryotes including humans. Therefore, these findings will help elucidate the mechanisms underlying age-associated metabolic disease and perhaps human aging. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available