| PDPK1 - 3-Phosphoinositide-Dependent Protein Kinase 1
Abbreviation: PDPK1, PDK1
Type: Serine/threonine protein kinase / PI3K pathway signaling kinase / AGC kinase activator
Function: PDPK1 is a central signaling kinase downstream of phosphoinositide 3-kinase. It phosphorylates and activates multiple AGC-family kinases, including AKT, S6K, SGK, RSK, and selected PKC isoforms, thereby regulating proliferation, survival, metabolism, migration, and cellular growth.
Cancer: ↑ Frequently overexpressed, hyperactivated, or functionally dysregulated in cancer. Increased PDPK1 signaling enhances PI3K-AKT pathway output, proliferation, survival, migration, invasion, metastasis, metabolic adaptation, and resistance to anticancer therapies. Genetic or pharmacological suppression of PDPK1 can inhibit tumor growth and restore treatment sensitivity in experimental models.
Favorable Direction in Cancer: ↓ PDPK1 expression or kinase activity is generally favorable.
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