Disruption of Snf3/Rgt2 glucose sensors decreases lifespan and caloric restriction effectiveness through Mth1/Std1 by adjusting mitochondrial efficiency in yeast

Kyung Mi Choi, Young Yon Kwon, Cheol-Koo Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Down-regulation of intracellular nutrient signal pathways was proposed to be a primary mechanism of caloric restriction (CR)-mediated lifespan extension. However, the link between lifespan and glucose sensors in the plasma membrane was poorly understood in yeast. Herein, a mutant that lacked glucose sensors (snf3Δrgt2Δ) had impaired glucose fermentation, showed decreased chronological lifespan (CLS), and reduced CLS extension by CR. The mutant also had reduced mitochondrial efficiency, as inferred by increased mitochondrial superoxide and decreased ATP levels. Mth1 and Std1, which are downstream effectors of the Snf3/Rgt2 pathway, were required for viability through mitochondrial function but not fermentative metabolism.

Original languageEnglish
Pages (from-to)349-357
Number of pages9
JournalFEBS Letters
Volume589
Issue number3
DOIs
Publication statusPublished - 2015 Jan 30

Keywords

  • Chronological lifespan
  • Glucose sensor
  • Gpr1
  • Mitochondrial function
  • Rgt2
  • Snf3

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Genetics
  • Molecular Biology
  • Structural Biology

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