caution:The number, localization and denomination of hydrophobic domains in the Na(+)/H(+) exchangers vary among authors.,function:Involved in pH regulation to eliminate acids generated by active metabolism or to counter adverse environmental conditions. Major proton extruding system driven by the inward sodium ion chemical gradient. Plays an important role in signal transduction.,PTM:Phosphorylated by PKA, which inhibits activity.,similarity:Belongs to the monovalent cation:proton antiporter 1 (CPA1) transporter (TC 2.A.36) family.,subcellular location:In intestinal epithelial cells, localizes to the ileal brush border.,subunit:Binds SLC9A3R1 and SLC9A3R2. Interacts with SHANK2. Interacts with PDZD3 and interactions decrease in response to elevated calcium ion levels.,
Apical cell membrane ; Multi-pass membrane protein . In intestinal epithelial cells, localizes to the ileal brush border. Phosphorylation at Ser-663 by SGK1 is associated with increased abundance at the cell membrane. Angiotensin-2 enhances apical expression (By similarity). .
Colon,Kidney cortex,
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