Recombinant Human Serine/threonine-protein kinase WNK4 (WNK4), Truncated

Uniprot Id

Q96J92

Target Species

Human

Target Name

WNK4

Target Full Name

Serine/threonine-protein kinase WNK4

Target Function

Serine/threonine kinase which plays an important role in the regulation of electrolyte homeostasis, cell signaling, survival and proliferation. Acts as an activator and inhibitor of sodium-coupled chloride cotransporters and potassium-coupled chloride cotransporters respectively. Activates SCNN1A, SCNN1B, SCNN1D, SGK1, TRPV5 and TRPV6. Regulates the activity of the thiazide-sensitive Na-Cl cotransporter, SLC12A3, by phosphorylation which appears to prevent membrane trafficking of SLC12A3. Also inhibits the renal K(+) channel, KCNJ1, via a kinase-independent mechanism by which it induces clearance of the protein from the cell surface by clathrin-dependent endocytosis. WNK4 appears to act as a molecular switch that can vary the balance between NaCl reabsorption and K(+) secretion to maintain integrated homeostasis. Phosphorylates NEDD4L. Acts as a scaffold to inhibit SLC4A4 as well as CFTR activities and surface expression, recruits STK39 which mediates the inhibition.

Target Involvement

Pseudohypoaldosteronism 2B (PHA2B)

Target Subcellular Location

Cell junction, tight junction.

Target Protein Families

Protein kinase superfamily, Ser/Thr protein kinase family, WNK subfamily

Target Tissue Specificity

Expressed in kidney, colon and skin.

Target Synonyms

PHA 2B; PHA2B; PRKWNK 4; PRKWNK4; Protein kinase lysine deficient 4; Protein kinase lysine-deficient 4; Protein kinase with no lysine 4; Serine/threonine protein kinase WNK4; Serine/threonine-protein kinase WNK4; WNK lysine deficient protein kinase 4; Wnk4; WNK4_HUMAN