has a Stoichiometric coefficient of 2 AKT phosphorylates and inhibits TSC2 (tuberin), a suppressor of the TOR kinase pathway, which senses nutrient levels in the environment. TSC2 forms a TSC1-TSC2 protein complex that is a GAP (GTPase activating protein) for the RHEB G-protein. RHEB, in turn, activates the TOR kinase. Thus, an active AKT1 activates the TOR kinase, both of which are positive signals for cell growth (an increase in cell mass) and division.<br>The TOR kinase regulates two major processes: translation of selected mRNAs in the cell and autophagy. In the presence of high nutrient levels TOR is active and phosphorylates the 4EBP protein releasing the eukaryotic initiation factor 4E (eIF4E), which is essential for cap-dependent initiation of translation and promoting growth of the cell (PMID: 15314020). TOR also phosphorylates the S6 kinase, which is implicated in ribosome biogenesis as well as in the modification of the S6 ribosomal protein. AKT can also activate mTOR by another mechanism, involving phosphorylation of PRAS40, an inhibitor of mTOR activity. Authored: Nasi, S, Annibali, D, 2006-10-10 09:07:07 Reviewed: Greene, LA, 2007-11-08 15:39:37

http://purl.obolibrary.org/obo/HINO_0009557

has a Stoichiometric coefficient of 2

AKT phosphorylates and inhibits TSC2 (tuberin), a suppressor of the TOR kinase pathway, which senses nutrient levels in the environment. TSC2 forms a TSC1-TSC2 protein complex that is a GAP (GTPase activating protein) for the RHEB G-protein. RHEB, in turn, activates the TOR kinase. Thus, an active AKT1 activates the TOR kinase, both of which are positive signals for cell growth (an increase in cell mass) and division.
The TOR kinase regulates two major processes: translation of selected mRNAs in the cell and autophagy. In the presence of high nutrient levels TOR is active and phosphorylates the 4EBP protein releasing the eukaryotic initiation factor 4E (eIF4E), which is essential for cap-dependent initiation of translation and promoting growth of the cell (PMID: 15314020). TOR also phosphorylates the S6 kinase, which is implicated in ribosome biogenesis as well as in the modification of the S6 ribosomal protein. AKT can also activate mTOR by another mechanism, involving phosphorylation of PRAS40, an inhibitor of mTOR activity.

Authored: Nasi, S, Annibali, D, 2006-10-10 09:07:07

Reviewed: Greene, LA, 2007-11-08 15:39:37

Reactome, http://www.reactome.org

Pubmed12150915

Pubmed12172553

http://purl.obolibrary.org/obo/UniProt_P49815-1

http://purl.obolibrary.org/obo/CHEBI_15422

http://purl.obolibrary.org/obo/UniProt_P49815-1

http://purl.obolibrary.org/obo/CHEBI_16761

AKT phosphorylates TSC2, inhibiting it

HINO:0009557

AKT phosphorylates TSC2, inhibiting it

Reactome Database ID Release 43198609

ReactomeREACT_12532

EC Number: 2.7.11

http://purl.obolibrary.org/obo/INO_0000040