Gene Information
Gene NameSLC9A3
OrganismHomo sapiens (Human)
Gene Length834
Protein NamesSodium/hydrogen exchanger 3 (Na(+)/H(+) exchanger 3) (NHE-3) (Solute carrier family 9 member 3)
Target Namesodium/hydrogen exchanger 3
Target TypeSuccessful target
Gene Age1292 ( ENSG00000066230 )
3 ( ENSG00000281861 )
Evolutionary StageEuk+Bac
AlphaFoldDBP48764
Gene CardSLC9A3
Uniprot IDP48764
PfamPF00999
In ASDno
Allosteric Predictionyes (0.510626655)
Ortholog in AnimalsAlpaca_ SLC9A3 ( ortholog_one2one )
Dog_ SLC9A3 ( ortholog_one2one )
GuineaPig_ SLC9A3 ( ortholog_one2one )
Macaque_ SLC9A3 ( ortholog_one2one )
Mouse_ Slc9a3 ( ortholog_one2one )
Pig_ SLC9A3 ( ortholog_one2one )
Rat_ Slc9a3 ( ortholog_one2one )
Rabbit_ SLC9A3 ( ortholog_one2one )
OhnologsSLC9A5
ParalogsSLC9A7, SLC9A6, SLC9C1, SLC9A4, SLC9A1, SLC9A9, SLC9A5, SLC9A2, SLC9A8, SLC9C2
Tissuesmall.intestine
Tissue SpecificityNA
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB 7X2U  (EM  3.20A 
DBSNP rs1047334552  rs869312807  rs869312806  rs766076524  rs2247114 
Subcellular location [CC]Apical cell membrane {ECO:0000269|PubMed:19088451, ECO:0000269|PubMed:26358773};
Multi-pass membrane protein {ECO:0000269|PubMed:19088451}. Note=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). {ECO:0000250|UniProtKB:Q28362}.
Mouse PG classificationHPG
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