Negative regulator of the mechanistic target of rapamycin complex 1 (mTORC1), an evolutionarily conserved central nutrient sensor that stimulates anabolic reactions and macromolecule biosynthesis to promote cellular biomass generation and growth ( , ). In absence of insulin and nutrients, AKT1S1 associates with the mTORC1 complex and directly inhibits mTORC1 activity by blocking the MTOR substrate-recruitment site . In response to insulin and nutrients, AKT1S1 dissociates from mTORC1 (, ). Its activity is dependent on its phosphorylation state and binding to 14-3-3 (, ). May also play a role in nerve growth factor-mediated neuroprotection (By similarity).
Subcellular locations: Cytoplasm, Cytosol
Found in the cytosolic fraction of the brain.
Widely expressed with highest levels of expression in liver and heart. Expressed at higher levels in cancer cell lines (e.g. A-549 and HeLa) than in normal cell lines (e.g. HEK293).