Serine/threonine-protein kinase which is involved in the regulation of a wide variety of ion channels, membrane transporters, cell growth, proliferation, survival and migration. Up-regulates Na(+) channels: SCNN1A/ENAC and SCN5A, K(+) channels: KCNA3/KV1.3, KCNE1, KCNQ1 and KCNH2/HERG, epithelial Ca(2+) channels: TRPV5 and TRPV6, chloride channel: BSND, creatine transporter: SLC6A8, Na(+)/dicarboxylate cotransporter: SLC13A2/NADC1, Na(+)-dependent phosphate cotransporter: SLC34A2/NAPI-2B, amino acid transporters: SLC1A5/ASCT2 and SLC6A19, glutamate transporters: SLC1A3/EAAT1, SLC1A6/EAAT4 and SLC1A7/EAAT5, glutamate receptors: GRIA1/GLUR1 and GRIK2/GLUR6, Na(+)/H(+) exchanger: SLC9A3/NHE3, and the Na(+)/K(+) ATPase. Plays a role in the regulation of renal tubular phosphate transport and bone density. Phosphorylates NEDD4L and GSK3B. Positively regulates ER transcription activity through phosphorylation of FLII. Negatively regulates the function of ITCH/AIP4 via its phosphorylation and thereby prevents CXCR4 from being efficiently sorted to lysosomes. Interacts with GSK3B and FLII. Interacts with PDPK1 in a phosphorylation-dependent manner. Induced by estrogen/ER in breast cancer cells. Expressed in most tissues with highest levels in pancreas, kidney liver, heart and brain and lower levels in lung, placenta and skeletal muscle. Expression is higher in ER- positive breast tumors than ER-negative breast tumors. Two specific sites, one in the kinase domain (Thr-320) and the other in the C-terminal regulatory region (Ser- 486), need to be phosphorylated for its full activation. Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: EC 220.127.116.11; Protein kinase, AGC; Kinase, protein; Protein kinase, Ser/Thr (non-receptor); AGC group; SGK family
Cellular Component: recycling endosome; cytoplasmic membrane-bound vesicle; early endosome; cytosol
Molecular Function: protein serine/threonine kinase activity; protein binding; potassium channel regulator activity; chloride channel regulator activity; sodium channel regulator activity; calcium channel regulator activity; phosphoinositide binding; ATP binding; protein kinase activity
Biological Process: regulation of transcription factor activity; response to stress; regulation of cell growth; protein amino acid phosphorylation; transmembrane transport; regulation of cell migration; regulation of cell proliferation
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.