adenosine monophosphate-activated protein kinase (AMPK) signaling pathway
AMPK senses changes in cellular energy as an ATP/AMP ratio. AMP binding allosterically activates AMPK; subsequent phosphorylation events lead to repression of energy consuming pathways. One target of AMPK is the mTOR signaling pathway. AMPK activates the inhibitory Tsc2 while inhibiting the mTorc1 complex.