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PDPK1 phosphorylates AKT at T308

Stable Identifier
Homo sapiens
Locations in the PathwayBrowser

Once AKT is localized at the plasma membrane, it is phosphorylated at two critical residues for its full activation. These residues are a threonine (T308 in AKT1) in the activation loop within the catalytic domain, and a serine (S473 in AKT1), in a hydrophobic motif (HM) within the carboxy terminal, non-catalytic region. PDPK1 (PDK1) is the activation loop kinase; this kinase can also directly phosphorylate p70S6K. The HM kinase, previously termed PDK2, has been identified as the mammalian TOR (Target Of Rapamycin; Sarbassov et al., 2005) but several other kinases are also able to phosphorylate AKT at S473. Phosphorylation of AKT at S473 by TORC2 complex is a prerequisite for PDPK1-mediated phosphorylation of AKT threonine T308 (Scheid et al. 2002, Sarabassov et al. 2005).

Participant Of
Event Information
Catalyst Activity
Catalyst Activity
protein serine/threonine kinase activity of p-S-AKT:PDPK1:PIP3 [plasma membrane]
Physical Entity
Orthologous Events