PMID- 7774014 OWN - NLM STAT- MEDLINE DCOM- 19950713 LR - 20220408 IS - 0092-8674 (Print) IS - 0092-8674 (Linking) VI - 81 IP - 5 DP - 1995 Jun 2 TI - The protein kinase encoded by the Akt proto-oncogene is a target of the PDGF-activated phosphatidylinositol 3-kinase. PG - 727-36 AB - The serine/threonine protein kinase encoded by the Akt proto-oncogene is catalytically inactive in serum-starved primary and immortalized fibroblasts. Here we show that Akt and the Akt-related kinase AKT2 are activated by PDGF. The activation was rapid and specific, and it was abrogated by mutations in the Akt Pleckstrin homology (PH) domain. The Akt activation was also shown to depend on PDGFR beta tyrosines Y740 and Y751, which bind phosphatidylinositol 3-kinase (PI 3-kinase) upon phosphorylation. Moreover, Akt activation was blocked by the PI 3-kinase-specific inhibitor wortmannin and the dominant inhibitory N17Ras. Conversely, Akt activity was induced following the addition of phosphatidylinositol-3-phosphate to Akt immunoprecipitates from serum-starved cells in vitro. These results identify Akt as a novel target of PI 3-kinase and suggest that the Akt PH domain may be a mediator of PI 3-kinase signaling. FAU - Franke, T F AU - Franke TF AD - Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA. FAU - Yang, S I AU - Yang SI FAU - Chan, T O AU - Chan TO FAU - Datta, K AU - Datta K FAU - Kazlauskas, A AU - Kazlauskas A FAU - Morrison, D K AU - Morrison DK FAU - Kaplan, D R AU - Kaplan DR FAU - Tsichlis, P N AU - Tsichlis PN LA - eng GR - CA-55063/CA/NCI NIH HHS/United States GR - R01-CA38047/CA/NCI NIH HHS/United States GR - R01-CA57436/CA/NCI NIH HHS/United States GR - etc. PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Cell JT - Cell JID - 0413066 RN - 0 (Androstadienes) RN - 0 (Enzyme Inhibitors) RN - 0 (Oncogene Proteins) RN - 0 (Phosphatidylinositol 4,5-Diphosphate) RN - 0 (Phosphatidylinositol Phosphates) RN - 0 (Platelet-Derived Growth Factor) RN - 0 (Proto-Oncogene Proteins) RN - EC 2.7.1.- (Phosphotransferases (Alcohol Group Acceptor)) RN - EC 2.7.10.1 (Receptors, Platelet-Derived Growth Factor) RN - EC 2.7.11.1 (Akt1 protein, rat) RN - EC 2.7.11.1 (Akt2 protein, mouse) RN - EC 2.7.11.1 (Akt2 protein, rat) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 3.6.5.2 (ras Proteins) RN - XVA4O219QW (Wortmannin) SB - IM MH - Androstadienes/pharmacology MH - Animals MH - Cells, Cultured MH - Enzyme Activation/drug effects MH - Enzyme Induction MH - Enzyme Inhibitors/pharmacology MH - *Gene Expression Regulation, Enzymologic MH - Mice MH - Models, Biological MH - Oncogene Proteins/drug effects/metabolism MH - Phosphatidylinositol 3-Kinases MH - Phosphatidylinositol 4,5-Diphosphate MH - Phosphatidylinositol Phosphates/pharmacology MH - Phosphotransferases (Alcohol Group Acceptor)/*metabolism MH - Platelet-Derived Growth Factor/*pharmacology MH - Protein Serine-Threonine Kinases/drug effects/metabolism MH - Proto-Oncogene Proteins/drug effects/*metabolism MH - Proto-Oncogene Proteins c-akt MH - Proto-Oncogenes MH - Rats MH - Receptors, Platelet-Derived Growth Factor/metabolism MH - Sequence Homology, Amino Acid MH - *Signal Transduction MH - Wortmannin MH - ras Proteins/metabolism EDAT- 1995/06/02 00:00 MHDA- 1995/06/02 00:01 CRDT- 1995/06/02 00:00 PHST- 1995/06/02 00:00 [pubmed] PHST- 1995/06/02 00:01 [medline] PHST- 1995/06/02 00:00 [entrez] AID - 0092-8674(95)90534-0 [pii] AID - 10.1016/0092-8674(95)90534-0 [doi] PST - ppublish SO - Cell. 1995 Jun 2;81(5):727-36. doi: 10.1016/0092-8674(95)90534-0.