Glutamate dehydrogenase contributes to leucine sensing in the regulation of autophagy

Abstract

Amino acids, leucine in particular, are known to inhibit autophagy, at least in part by their ability to stimulate MTOR - mediated signaling. Evidence is presented showing that glutamate dehydrogenase, the central enzyme in amino acid catabolism, contributes to leucine sensing in the regulation of autophagy. The data suggest a dual mechanism by which glutamate dehydrogenase activity modulates autophagy, i.e., by activating MTORC 1 and by limiting the formation of reactive oxygen species. © 2013 Landes Bioscience.