Kinase

Kinase designates an enzyme that catalyses the transfer of phosphate groups, typically from ATP, to target molecules such as proteins, lipids, or sugars, regulating signalling pathways that control cell growth, metabolism, differentiation, and survival. Protein kinases represent one of the most important regulatory enzyme classes in biology, with phosphorylation acting as a reversible molecular switch that modulates protein activity, localisation, and interactions. Dysregulated kinase activity contributes to numerous diseases, particularly cancer and inflammatory disorders.

The pharmaceutical industry has developed extensive kinase inhibitor portfolios, particularly in oncology where aberrant signalling drives tumour proliferation and resistance. Drug discovery focuses on achieving selectivity across highly conserved kinase domains while maintaining potency against disease-relevant targets. Clinical development incorporates biomarker-driven strategies identifying patients with kinase-activating mutations, amplifications, or pathway dependencies. Resistance mechanisms frequently emerge through secondary mutations, pathway bypass, or adaptive rewiring, driving combination approaches and next-generation inhibitors. As kinase biology expands into immunology, fibrosis, and neurodegeneration, kinase-targeted therapies continue evolving through improved selectivity, covalent binding strategies, and allosteric modulation.