alexa The Akt kinases: isoform specificity in metabolism and cancer.


Journal of Antivirals & Antiretrovirals

Author(s): Gonzalez E, McGraw TE

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Abstract The Akt (PKB) protein kinases are critical regulators of human physiology that control an impressive array of diverse cellular functions, including the modulation of growth, survival, proliferation and metabolism. The Akt kinase family is comprised of three highly homologous isoforms: Akt1 (PKBalpha), Akt2 (PKBbeta) and Akt3 (PKBgamma). Phenotypic analyses of Akt isoform knockout mice documented Akt isoform specific functions in the regulation of cellular growth, glucose homeostasis and neuronal development. Those studies establish that the functions of the different Akt kinases are not completely overlapping and that isoform-specific signaling contributes to the diversity of Akt activities. However, despite these important advances, a thorough understanding about the specific roles of Akt family members and the molecular mechanisms that determine Akt isoform functional specificity will be essential to elucidate the complexity of Akt regulated cellular processes and how Akt isoform-specific deregulation might contribute to disease states. Here, we summarize recent advances in understanding the roles of Akt isoforms in the regulation of metabolism and cancer, and possible mechanisms contributing to Akt isoform functional specificity.
This article was published in Cell Cycle and referenced in Journal of Antivirals & Antiretrovirals

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