ABL1 (E255K Mutant) Proteins

Protein Information

c-Abl (Abelson murine leukemia viral oncogene homolog 1, ABL1) is a 140 kDa proto-oncogene member of the Src family of non-receptor tyrosine kinases. c-Abl has been implicated in processes of cell differentiation, cell division, cell adhesion, and stress response. Activity of c-Abl protein is negatively regulated by its SH3 domain, and deletion of the SH3 domain turns c-Abl into an oncogene. The t(9;22) translocation results in the head-to-tail fusion of the BCR and c-Abl genes present in many cases of chronic myelogeneous leukemia. The DNA-binding activity of the ubiquitously expressed ABL1 tyrosine kinase is regulated by CDC2-mediated phosphorylation, suggesting a cell cycle function for c-Abl. The c-Abl oncogene is implicated in several human leukemias including 90-95% of chronic myelocytic leukemia (CML), 20-25% of adult acute lymphoblastic leukemia (ALL) and 2-5% of pediatric ALL. c-Abl localizes to dynamic actin structures, and phosphorylates CRK and CRKL, DOK1, and other proteins controlling cytoskeleton dynamics. c-ABL potentially regulates DNA repair by activating the proapoptotic pathway when the DNA damage is too severe to be repaired.