Src Family Kinases, BCR-ABL, and other Tyrosine Kinases (ABL1 (BCR-ABL for fusion protein); Src (for Src family kinases))

These kinases are intracellular enzymes that transfer phosphate groups to tyrosine residues on substrate proteins, thereby modulating diverse signaling pathways regulating cell proliferation, survival, migration, and differentiation. The Src family kinases are a group of structurally related, non-receptor tyrosine kinases involved in various cell functions, whereas ABL1 is a distinct non-receptor tyrosine kinase notable for its role in cancer when aberrantly activated by fusion with BCR, forming BCR-ABL. BCR-ABL possesses constitutive kinase activity, driving oncogenesis in CML and other leukemias[1][3][6][7]. Targeted therapies, especially tyrosine kinase inhibitors (TKIs), have drastically improved patient outcomes by specifically inhibiting these kinases and their pathological signaling[2][3][5]. This composite target entry should be broken down into its specific kinase components for precise structured annotation. Each kinase (e.g., ABL1, Src, Fyn) would merit its own profile.

Other names

BCR-ABL: Breakpoint Cluster Region-Abelson fusion proteinABL1: c-Abl, Abelson tyrosine kinaseSrc family: Src, Fyn, Yes, Lck, Lyn, Hck, Blk, FgrNon-receptor tyrosine kinases

ATP-competitive inhibition of kinase catalytic activity - Inhibition of autophosphorylation and substrate phosphorylation - Blockade of oncogenic downstream signaling (e.g., STAT5, Crkl phosphorylation)