Abl Protein Tyrosine Kinase (AbI) is a truncated form of the v-AbI Protein Tyrosine Kinase, a partner in the Gag-Abl fusion protein of the Abelson murine leukemia virus. Abl contains 407 amino acids (residues 237-643 of the p120-gag-abl polyprotein), which include the kinase catalytic domain, SH2 domain on the N-terminus and the I237M mutation. This truncated form of v-Abl is identical to the normal c-Abl (1-3). Abl is autophosphorylated on tyrosine(s)(2).
Highlights
Protein tyrosine kinase
Abelson Murine Leukemia Virus, recombinant (E. coli)
Product Source
Isolated from a strain ofE. colithat carries the truncated AbI Protein Kinase encoded by the Abelson murine leukemia virus under the control of a T7 expression system (kindly provided by Dr. S. Goff).
Recognition Determinant
The recognition motif for phosphorylation by Abl is I/V/LYXXP/F. Abl, like many cytosolic protein tyrosine kinases, preferentially phosphorylates sites recognized by its own SH2 domain, selects substrates with large hydrophobic amino acids at the +3 position and β-branched amino acids at the -1 position (4).