PRKG2/PKG2

Type II cGMP-dependent protein kinase, encoded by PRKG2, is distinguished from PKG1 by an N-terminal myristoylation signal that anchors it to the plasma membrane. It is expressed most highly in intestine, kidney, growth plate cartilage and brain, and mediates C-type natriuretic peptide and NO-cGMP signals controlling chloride secretion, chondrocyte proliferation and bone growth; Prkg2-deficient mice are dwarfed through disrupted endochondral ossification. PKG2 also modulates neuronal excitability and circadian behavior. Recombinant PKG2 enables comparison of membrane-tethered versus cytosolic cGMP kinase signaling and studies of the CNP-PKG2 axis in skeletal development and intestinal ion transport.