Regulation of SIRT6 protein levels by nutrient availability

FEBS Lett. 2008 Mar 5;582(5):543-8. doi: 10.1016/j.febslet.2008.01.019. Epub 2008 Jan 31.

Abstract

Sirtuins have been shown to regulate life-span in response to nutritional availability. We show here that levels of the mammalian sirtuin, SIRT6, increased upon nutrient deprivation in cultured cells, in mice after fasting, and in rats fed a calorie-restricted diet. The increase in SIRT6 levels is due to stabilization of SIRT6 protein, and not via an increase in SIRT6 transcription. In addition, p53 positively regulates SIRT6 protein levels under standard growth conditions but has no role in the nutrient-dependent regulation of SIRT6. These observations imply that at least two sirtuins are involved in regulation of life-span by nutrient availability.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Line
  • Food
  • Food Deprivation
  • Humans
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Models, Biological
  • Rats
  • Rats, Inbred F344
  • Sirtuins / metabolism*
  • Thermodynamics
  • Tumor Suppressor Protein p53

Substances

  • Tumor Suppressor Protein p53
  • Sirt6 protein, mouse
  • SIRT6 protein, human
  • Sirtuins