AKT3

AKT3

AKT3 is a serine/threonine-protein kinase that is encoded by the AKT3 gene in humans. It is a member of the AKT family of kinases, which are involved in various cellular processes including metabolism, proliferation, cell survival, growth, and angiogenesis.

Structure

AKT3, like other members of the AKT family, consists of three main domains: the pleckstrin homology (PH) domain, the kinase domain, and the regulatory domain. The PH domain is responsible for binding to phosphoinositides, which localizes AKT3 to the plasma membrane where it can be activated.

Function

AKT3 plays a crucial role in the PI3K/AKT signaling pathway, which is a key regulator of many cellular processes. This pathway is activated by various growth factors and hormones, leading to the activation of AKT3 through phosphorylation. Once activated, AKT3 can phosphorylate a wide range of substrates involved in cell cycle progression, apoptosis, and metabolism.

Clinical Significance

AKT3 has been implicated in several types of cancer, including glioblastoma, breast cancer, and prostate cancer. Overexpression or hyperactivation of AKT3 can lead to increased cell survival and proliferation, contributing to tumorigenesis. Inhibitors targeting the PI3K/AKT pathway are being explored as potential therapeutic agents in cancer treatment.

Research

Recent studies have focused on the role of AKT3 in the brain, where it is thought to be involved in neurodevelopment and neuroprotection. Mutations in the AKT3 gene have been associated with developmental disorders such as megalencephaly and polymicrogyria.

Also see

• AKT1
• AKT2
• PI3K/AKT signaling pathway
• Protein kinase
• Signal transduction