IndraLab

"In examining the requirements for different Akt-mediated phosphorylation sites on TSC2, we find that only TSC2 mutants lacking all five previously identified Akt sites fully block insulin-stimulated mTORC1 signaling in reconstituted Tsc2 null cells, and this mutant also inhibits adipogenesis"

"We have shown thataktregulates the tsc1-tsc2 complex by directly phosphorylating tsc2. Tsc2 is inactivated by akt-dependent phosphorylation, which destabilizes tsc2 and disrupts its interaction with tsc1. Tsc2 is inactivated by akt-dependent phosphorylation, which destabilizes tsc2 and disrupts its interaction with tsc1akt has been shown to directly phosphorylate two sites on tsc2 (s939 and t1462 on the full-length human protein), which are conserved and phosphorylated in drosophila tsc2, and is likely to phosphorylate two or three additional sites (s981 and s1130/s1132)."

"Akt1 dependent phosphorylation negatively regulates the functioning of TSC1 and TSC2, 2 other factors involved in insulin signaling."

"In turn, Akt phosphorylates the tuberous scleorisis complex, TSC1/TSC2 (hamartin/tuberin) that serves as a GTPase activating protein (GAP) for the small G protein, Ras homolog enriched in brain (Rheb)."