Coupled regulation by the juxtamembrane and sterile α motif (SAM) linker is a hallmark of ephrin tyrosine kinase evolution.

ABSTRACT: Ephrin (Eph) receptor tyrosine kinases have evolutionarily diverged from other tyrosine kinases to respond to specific activation and regulatory signals that require close coupling of kinase catalytic and regulatory functions. However, the evolutionary basis for such functional coupling is not fully understood. We employed an evolutionary systems approach involving statistical mining of large sequence and structural data sets to define the hallmarks of Eph kinase evolution and functional specialization. We found that some of the most distinguishing Eph-specific residues structurally tether the flanking juxtamembrane and sterile α motif (SAM) linker regions to the kinase domain, and substitutions of these residues in EphA3 resulted in faster kinase activation. We report for the first time t

SUBMITTER: Kwon A 

PROVIDER: S-EPMC5892589 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature