SGK3 is a member of the SGK family and encodes a phosphoprotein with a PX (phox homology) domain. PKD1 can phosphorylate and activate SGK3 in vitro. A 10-fold increase in PKD1 increases the phosphorylation status of SGK3. When expressed in human embryonic kidney cells, IGF1 and peroxide significantly activate SGK3, and the activation could be reduced by preincubation with inhibitors of PI3 kinase. A yeast 2-hybrid screen found direct interaction between human SGK3 and GSK3b. SGK3 phosphorylates several target proteins and has a role in neutral amino acid transport and activation of potassium and chloride channels.
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Pflugers Archiv : European journal of physiology, 445(1), 60-66 (2002-10-25)
The serum- and glucocorticoid-dependent kinase SGK1 was originally identified as a glucocorticoid-sensitive gene. Subsequently, the two homologous kinases SGK2 and SGK3 have been cloned, being products of distinct genes, which are differentially expressed and share 80% identity in amino acid
The Biochemical journal, 344 Pt 1, 189-197 (1999-11-05)
The catalytic domain of serum- and glucocorticoid-induced protein kinase (SGK) is 54% identical with protein kinase B (PKB) and, like PKB, is activated in vitro by 3-phosphoinositide-dependent protein kinase-1 (PDK1) and in vivo in response to signals that activate phosphatidylinositol
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