Protein: Electrogenic sodium bicarbonate cotransporter 1 (Sodium bicarbonate cotransporter) (Na(+)/HCO3(-) cotransporter) (Solute carrier family 4 member 4) (kNBC1) (Q9Y6R1)
Organism: Homo sapiens (Human)
Function: Electrogenic sodium/bicarbonate cotransporter with a Na(+):HCO3(-) stoichiometry varying from 1:2 to 1:3. May regulate bicarbonate influx/efflux at the basolateral membrane of cells and regulate intracellular pH.
Subcellular location: Basolateral cell membrane {ECO:0000269|PubMed:12907161, ECO:0000269|PubMed:15273250, ECO:0000269|PubMed:15713912, ECO:0000269|PubMed:17661077}; Multi-pass membrane protein {ECO:0000269|PubMed:12534288, ECO:0000305|PubMed:29500354}. Cell membrane {ECO:0000269|PubMed:12534288, ECO:0000269|PubMed:15817634, ECO:0000269|PubMed:15930088, ECO:0000269|PubMed:16636648, ECO:0000269|PubMed:23324180, ECO:0000269|PubMed:23636456, ECO:0000269|PubMed:29500354}; Multi-pass membrane protein {ECO:0000269|PubMed:12534288, ECO:0000305|PubMed:29500354}.
Sequence: MEDEAVLDRGASFLKHVCDEEEVEGHHTIYIGVHVPKSYRRRRRHKRKTGHKEKKEKERISENYSDKSDIENADESSSSILKPLISPAAERIRFILGEEDDSPAPPQLFTELDELLAVDGQEMEWKETARWIKFEEKVEQGGERWSKPHVATLSLHSLFELRTCMEKGSIMLDREASSLPQLVEMIVDHQIETGLLKPELKDKVTYTLLRKHRHQTKKSNLRSLADIGKTVSSASRMFTNPDNGSPAMTHRNLTSSSLNDISDKPEKDQLKNKFMKKLPRDAEASNVLVGEVDFLDTPFIAFVRLQQAVMLGALTEVPVPTRFLFILLGPKGKAKSYHEIGRAIATLMSDEVFHDIAYKAKDRHDLIAGIDEFLDEVIVLPPGEWDPAIRIEPPKSLPSSDKRKNMYSGGENVQMNGDTPHDGGHGGGGHGDCEELQRTGRFCGGLIKDIKRKAPFFASDFYDALNIQALSAILFIYLATVTNAITFGGLLGDATDNMQGVLESFLGTAVSGAIFCLFAGQPLTILSSTGPVLVFERLLFNFSKDNNFDYLEFRLWIGLWSAFLCLILVATDASFLVQYFTRFTEEGFSSLISFIFIYDAFKKMIKLADYYPINSNFKVGYNTLFSCTCVPPDPANISISNDTTLAPEYLPTMSSTDMYHNTTFDWAFLSKKECSKYGGNLVGNNCNFVPDITLMSFILFLGTYTSSMALKKFKTSPYFPTTARKLISDFAIILSILIFCVIDALVGVDTPKLIVPSEFKPTSPNRGWFVPPFGENPWWVCLAAAIPALLVTILIFMDQQITAVIVNRKEHKLKKGAGYHLDLFWVAILMVICSLMALPWYVAATVISIAHIDSLKMETETSAPGEQPKFLGVREQRVTGTLVFILTGLSVFMAPILKFIPMPVLYGVFLYMGVASLNGVQFMDRLKLLLMPLKHQPDFIYLRHVPLRRVHLFTFLQVLCLALLWILKSTVAAIIFPVMILALVAVRKGMDYLFSQHDLSFLDDVIPEKDKKKKEDEKKKKKKKGSLDSDNDDSDCPYSEKVPSIKIPMDIMEQQPFLSDSKPSDRERSPTFLERHTSC
InterPro domains: - IPR013769: Band 3 cytoplasmic domain (domain) [107-387]
- IPR011531: Bicarbonate transporter-like, transmembrane domain (domain) [441-1006]
- IPR003020: Bicarbonate transporter, eukaryotic (family) [105-1036]
- IPR016152: Phosphotransferase/anion transporter (homologous_superfamily) [102-412]
- IPR003024: Sodium bicarbonate cotransporter (family) [138-577]
Interaction partners: - S-adenosylhomocysteine hydrolase-like protein 1
- Carbonic anhydrase 2
- Carbonic anhydrase 4
- Sodium/hydrogen exchanger 3
- Sodium/hydrogen exchanger 1
- Solute carrier family 26 member 6
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005215 (transporter activity), GO:0022857 (transmembrane transporter activity), GO:1901702 (salt transmembrane transporter activity), GO:0015075 (monoatomic ion transmembrane transporter activity), GO:0008514 (organic anion transmembrane transporter activity), GO:0015318 (inorganic molecular entity transmembrane transporter activity), GO:0022804 (active transmembrane transporter activity), GO:0022890 (inorganic cation transmembrane transporter activity), GO:0022853 (active monoatomic ion transmembrane transporter activity), GO:0008324 (monoatomic cation transmembrane transporter activity), GO:0015106 (bicarbonate transmembrane transporter activity), GO:0015081 (sodium ion transmembrane transporter activity), GO:0015291 (secondary active transmembrane transporter activity), GO:0015293 (symporter activity), GO:0140410 (solute:bicarbonate symporter activity), GO:0015294 (solute:monoatomic cation symporter activity), GO:0046873 (metal ion transmembrane transporter activity), GO:0015370 (solute:sodium symporter activity)
Biological Process (BP): GO:0008150 (biological process), GO:0051179 (localization), GO:0051234 (establishment of localization), GO:0006810 (transport), GO:0071702 (organic substance transport), GO:0019755 (one-carbon compound transport), GO:0015711 (organic anion transport), GO:0015701 (bicarbonate transport)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0071944 (cell periphery), GO:0016020 (membrane), GO:0005886 (plasma membrane)