Anti-MRCK alpha Polyclonal Antibody

MRCK alpha (myotonic dystrophy kinase-related Cdc42-binding kinase alpha) is a member of the dystrophia myotonica protein kinase (DMPK) family that functions downstream of Cdc42 in actin cytoskeletal reorganization. It is a serine/threonine kinase with multiple functional domains, including phorbol ester-responsive C1 domain. Three independent coiled-coil domains and the N-terminal region preceding the kinase domain are responsible for intermolecular interactions leading to MRCK alpha multimerization. The transautophosphorylation process is critical for regulation of MRCK alpha catalytic activities. Binding of phorbol esters to MRCK releases its autoinhibition, allowing N-terminal dimerization and subsequent kinase activation. Protein function: Serine/threonine-protein kinase which is an important downstream effector of CDC42 and plays a role in the regulation of cytoskeleton reorganization and cell migration (PubMed:15723050, PubMed:9418861, PubMed:9092543). Regulates actin cytoskeletal reorganization via phosphorylation of PPP1R12C and MYL9/MLC2 (PubMed:21457715). In concert with MYO18A and LURAP1, is involved in modulating lamellar actomyosin retrograde flow that is crucial to cell protrusion and migration (PubMed:18854160). Phosphorylates: PPP1R12A, LIMK1 and LIMK2 (PubMed:11340065, PubMed:11399775). May play a role in TFRC-mediated iron uptake (PubMed:20188707). In concert with FAM89B/LRAP25 mediates the targeting of LIMK1 to the lamellipodium resulting in its activation and subsequent phosphorylation of CFL1 which is important for lamellipodial F-actin regulation. [The UniProt Consortium]