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Metabolic stress due to nutrient excess and lipid accumulation is at the root of many age-associated disorders and the identification of therapeutic targets that mimic the beneficial effects of calorie restriction has clinical importance. Here, using
C. elegans
as a model organism, we study the roles of a recently discovered enzyme at the heart of metabolism in mammalian cells, glycerol-3-phosphate phosphatase (G3PP) (gene name
Pgp
) that hydrolyzes glucose-derived glycerol-3-phosphate to glycerol. We identify three
Pgp
homologues in
C. elegans
(
pgph
) and demonstrate in vivo that their protein products have G3PP activity, essential for glycerol synthesis. We demonstrate that PGPH/G3PP regulates the adaptation to various stresses, in particular hyperosmolarity and glucotoxicity. Enhanced G3PP activity reduces fat accumulation, promotes healthy aging and acts as a calorie restriction mimetic at normal food intake without altering fertility. Thus, PGP/G3PP can be considered as a target for age-related metabolic disorders.
Glycerol-3-phosphate phosphatase is a recently discovered enzyme at the heart of metabolism. Here, the authors used
C. elegans
and showed that its activation promotes stress resistance, healthy aging and acts as a calorie restriction mimetic at normal food intake without altering fertility.