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The WNKs: atypical protein kinases with pleiotropic actions McCormick JA; Ellison DHPhysiol Rev 2011[Jan]; 91 (1): 177-219WNKs are serine/threonine kinases that comprise a unique branch of the kinome. They are so-named owing to the unusual placement of an essential catalytic lysine. WNKs have now been identified in diverse organisms. In humans and other mammals, four genes encode WNKs. WNKs are widely expressed at the message level, although data on protein expression is more limited. Soon after the WNKs were identified, mutations in genes encoding WNK1 and -4 were determined to cause the human disease familial hyperkalemic hypertension (also known as pseudohypoaldosteronism II, or Gordon's Syndrome). For this reason, a major focus of investigation has been to dissect the role of WNK kinases in renal regulation of ion transport. More recently, a different mutation in WNK1 was identified as the cause of hereditary sensory and autonomic neuropathy type II, an early-onset autosomal disease of peripheral sensory nerves. Thus the WNKs represent an important family of potential targets for the treatment of human disease, and further elucidation of their physiological actions outside of the kidney and brain is necessary. In this review, we describe the gene structure and mechanisms regulating expression and activity of the WNKs. Subsequently, we outline substrates and targets of WNKs as well as effects of WNKs on cellular physiology, both in the kidney and elsewhere. Next, consequences of these effects on integrated physiological function are outlined. Finally, we discuss the known and putative pathophysiological relevance of the WNKs.|Amino Acid Sequence[MESH]|Animals[MESH]|Base Sequence[MESH]|Drug Delivery Systems[MESH]|Gene Expression Regulation[MESH]|Genetic Pleiotropy[MESH]|Hereditary Sensory and Autonomic Neuropathies/enzymology[MESH]|Humans[MESH]|Hypertension/enzymology[MESH]|Intracellular Signaling Peptides and Proteins[MESH]|Minor Histocompatibility Antigens[MESH]|Molecular Sequence Data[MESH]|Multigene Family[MESH]|Neoplasms/enzymology[MESH]|Protein Serine-Threonine Kinases/*genetics/*metabolism[MESH]|Pseudohypoaldosteronism/enzymology[MESH]|WNK Lysine-Deficient Protein Kinase 1[MESH] |
