UniProt Summary: 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. May play a specialized role in the kidney in rectifying cell volume in response to extreme fluctuations of hyperosmolar-stimulated cell shrinkage. Is relatively amiloride and ethylisopropylamiloride (EIPA) insensitive. Can be activated under conditions of hyperosmolar-induced cell shrinkage in a sustained intracellular acidification-dependence manner. Activated by 4,4'-diisothiocyanostilbene-2,2'-disulfonic acid (DIDS) in a sustained intracellular acidification-dependence manner. Affects potassium/proton exchange as well as sodium/proton and lithium/proton exchange. In basolateral cell membrane, participates in homeostatic control of intracellular pH, and may play a role in proton extrusion in order to achieve transepithelial HCO3(-) secretion. In apical cell membrane may be involved in mediating sodium absorption. Requires for normal levels of gastric acid secretion, secretory membrane development, parietal cell maturation and/or differentiation and at least secondarily for chief cell differentiation (By similarity). {ECO:0000250}.
Pfam DomainsGO Terms
Pfam Domains
Na H Exchanger
GO Terms
gastric acid secretion
potassium:proton antiporter activity
sodium:proton antiporter activity
sodium ion import across plasma membrane
digestive system process
inorganic cation import across plasma membrane
inorganic ion import across plasma membrane
acid secretion
regulation of intracellular pH
sodium ion transmembrane transport
regulation of cellular pH
import across plasma membrane
regulation of pH
cellular monovalent inorganic cation homeostasis
digestion
monovalent inorganic cation homeostasis
proton transmembrane transport
sodium ion transport
potassium ion transmembrane transport
potassium ion transport
epithelial cell development
basolateral plasma membrane
anion transmembrane transport
apical plasma membrane
monovalent inorganic cation transport
inorganic cation transmembrane transport
anion transport
cation transmembrane transport
cellular cation homeostasis
metal ion transport
cellular ion homeostasis
inorganic ion transmembrane transport
import into cell
epithelial cell differentiation
cation homeostasis
inorganic ion homeostasis
cellular chemical homeostasis
ion homeostasis
cation transport
cellular homeostasis
ion transmembrane transport
chemical homeostasis
epithelium development
secretion
transmembrane transport
ion transport
homeostatic process
cell development
tissue development
system process
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)
Compound Hit
No hits were found.
Most Correlated Genes in Chemogenomics
No correlation found to any other genes in chemogenomics.
Tissues where Essential in the Avana Dataset (DepMap 20Q1)
Global Fraction of Cell Lines Where Essential: 0/739