Akt or Protein kinase B, is a serine/threonine kinase that plays an important role in regulating a number of cellular processes such as growth, metabolism and survival. The importance of the Akt pathway is highlighted by the mutation of various components of the pathway in human cancers such as the PTEN and PI3-kinase (P110α), which occur in more than 30% of human tumors. For Akt to achieve full activation, phosphorylation is needed at both serine 473 (ser473) of the hydrophobic tail and threonine 308 (thr308) of the activation motif, upon growth factor ligation to the receptor tyrosine kinases.
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