Living with Lethal PIP3 Levels: Viability of Flies Lacking PTEN Restored by a PH Domain Mutation in Akt/PKB
- Stocker, Hugo Zoologisches Institut der Universität Zürich, Switzerland
- Andjelkovic, Mirjana Friedrich Miescher Institute, Basel, Switzerland - Department of Vascular and Metabolic Diseases, F. Hoffmann-La Roche AG, Basel, Switzerland.
- Oldham, Sean Zoologisches Institut der Universität Zürich, Switzerland
- Laffargue, Muriel Medicine Department, University of Fribourg, Switzerland
- Wymann, Matthias P. Medicine Department, University of Fribourg, Switzerland
- Hemmings, Brian A. Friedrich Miescher Institute, Basel, Switzerland
- Hafen, Ernst Zoologisches Institut der Universität Zürich, Switzerland
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2002
Published in:
- Science. - 2002, vol. 15, no. 5562, p. 2088 - 2091
English
The phosphoinositide phosphatase PTEN is mutated in many human cancers. Although the role of PTEN has been studied extensively, the relative contributions of its numerous potential downstream effectors to deregulated growth and tumorigenesis remain uncertain. We provide genetic evidence in Drosophila melanogaster for the paramount importance of the protein kinase Akt [also called protein kinase B (PKB)] in mediating the effects of increased phosphatidylinositol 3,4,5-trisphosphate (PIP3) concentrations that are caused by the loss of PTEN function. A mutation in the pleckstrin homology (PH) domain of Akt that reduces its affinity for PIP3 sufficed to rescue the lethality of flies devoid of PTEN activity. Thus, Akt appears to be the only critical target activated by increased PIP3 concentrations in Drosophila.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
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- English
- Classification
- Biology
- License
- License undefined
- Identifiers
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- RERO DOC 6024
- DOI 10.1126/science.1068094
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300298
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