Serine/threonine-protein kinase MRCK beta (CDC42BPB)

Serine/threonine-protein kinase that's an important downstream effector of CDC42 and plays a role in the regulation of cytoskeleton reorganization and cell migration. Regulates actin cytoskeletal reorganization via phosphorylation of PPP1R12C and MYL9/MLC2 (PubMed:21457715, PubMed:21949762).

In concert with MYO18A and LURAP1, is involved in regulating lamellar actomyosin retrograde flow that is imperative to cell protrusion and migration (PubMed:18854160). Phosphorylates PPP1R12A (PubMed:21457715).