Protein Kinase Regulation and GTPase Signaling

Cells relay instructions from their environment through tightly choreographed chains of molecular switches, among the most important of which are small GTPases like Ras and the protein kinases they activate. When these pathways work correctly, they govern whether a cell grows, moves, or divides; when mutated, they become some of the most common drivers of human cancer. Researchers are working to understand exactly how signals branch and integrate—for example, how phospholipase C connects GTPase activity to calcium release, and how calcium in turn coordinates cell migration and gene expression. A central open challenge is determining why inhibiting a single node in these networks so often triggers compensatory routes that restore tumor growth, and how combination therapies might close those escape paths.

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Keywords

Ras SignalingProtein KinasesGTPasesCell RegulationCancer TherapyCalcium Signaling