cd05601: STKc_CRIK (this model, PSSM-Id:173692 is obsolete and has been replaced by 270752)
Catalytic domain of the Protein Serine/Threonine Kinase, Citron Rho-interacting kinase
Serine/Threonine Kinases (STKs), Citron Rho-interacting kinase (CRIK) subfamily, catalytic (c) domain. STKs catalyze the transfer of the gamma-phosphoryl group from ATP to serine/threonine residues on protein substrates. The CRIK subfamily is part of a larger superfamily that includes the catalytic domains of other protein STKs, protein tyrosine kinases, RIO kinases, aminoglycoside phosphotransferase, choline kinase, and phosphoinositide 3-kinase. CRIK is also called citron kinase. It contains a catalytic domain, a central coiled-coil domain, and a C-terminal region containing a Rho-binding domain (RBD), a zinc finger, and a pleckstrin homology (PH) domain, in addition to other motifs. CRIK, an effector of the small GTPase Rho, plays an important function during cytokinesis and affects its contractile process. CRIK-deficient mice show severe ataxia and epilepsy as a result of abnormal cytokinesis and massive apoptosis in neuronal precursors. A Down syndrome critical region protein TTC3 interacts with CRIK and inhibits CRIK-dependent neuronal differentiation and neurite extension.