O88343 (S4A4_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 96.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Electrogenic sodium bicarbonate cotransporter 1 Short name=Sodium bicarbonate cotransporter Alternative name(s): Na(+)/HCO3(-) cotransporter Solute carrier family 4 member 4 | ||||
| Gene names |
| ||||
| Organism | Mus musculus (Mouse) [Reference proteome] | ||||
| Taxonomic identifier | 10090 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 1079 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| 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. |
| Enzyme regulation | Inhibited by stilbene derivatives and regulated by cyclic AMP. |
| Subunit structure | Interacts with CA2/carbonic anhydrase 2 and CA4/carbonic anhydrase 4 which may regulate transporter activity. Ref.9 Ref.10 |
| Subcellular location | Basolateral cell membrane; Multi-pass membrane protein Ref.2. |
| Tissue specificity | Isoform 1 is specifically expressed in pancreatic ducts and acini. Also expressed in parotid acinar cells and in the colonic crypts. Ref.1 Ref.2 Ref.7 Ref.8 |
| Post-translational modification | Phosphorylation of Ser-1026 by PKA increases the binding of CA2 and changes the Na+:HCO3- stoichiometry of the transporter from 3:1 to 2:1 By similarity. N-glycosylated. May not be necessary for the transporter basic functions. Ref.6 |
| Sequence similarities | Belongs to the anion exchanger (TC 2.A.31) family. [View classification] |
Ontologies
| Keywords | |
|---|---|
| Biological process | Ion transport Sodium transport Symport Transport |
| Cellular component | Cell membrane Membrane |
| Coding sequence diversity | Alternative splicing |
| Domain | Transmembrane Transmembrane helix |
| Ligand | Sodium |
| PTM | Glycoprotein Phosphoprotein |
| Technical term | Complete proteome Direct protein sequencing Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | regulation of pH Traceable author statement Ref.1. Source: MGI |
| Cellular_component | basolateral plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell integral to plasma membraneTraceable author statement Ref.1. Source: MGI |
| Molecular_function | inorganic anion exchanger activity Inferred from electronic annotation. Source: InterPro sodium:bicarbonate symporter activityInferred from sequence or structural similarity Ref.1. Source: MGI |
| Complete GO annotation... | |
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: O88343-1) Also known as: pNBC; This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: O88343-2) Also known as: kNBC; The sequence of this isoform differs from the canonical sequence as follows: 1-44: Missing. 45-85: HKRKAGHKEK...SSSSILKPLI → MSTENVEGKP...FNHSIFTSAV | ||||||
| Isoform 3 (identifier: O88343-3) The sequence of this isoform differs from the canonical sequence as follows: 1-44: Missing. 45-85: HKRKAGHKEK...SSSSILKPLI → MSTENVEGKP...FNHSIFTSAV 185-201: MIADHQIETGLLKPDLK → LLGESRKVIRPAGFIRP 202-1079: Missing. | ||||||
| Note: No experimental confirmation available. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1079 | 1079 | Electrogenic sodium bicarbonate cotransporter 1 | PRO_0000079228 | |||||
Regions | |||||||||
| Topological domain | 1 – 468 | 468 | Cytoplasmic Potential | ||||||
| Transmembrane | 469 – 488 | 20 | Helical; Potential | ||||||
| Topological domain | 489 – 504 | 16 | Extracellular Potential | ||||||
| Transmembrane | 505 – 526 | 22 | Helical; Potential | ||||||
| Topological domain | 527 – 554 | 28 | Cytoplasmic Potential | ||||||
| Transmembrane | 555 – 580 | 26 | Helical; Potential | ||||||
| Topological domain | 581 – 691 | 111 | Extracellular Potential | ||||||
| Transmembrane | 692 – 710 | 19 | Helical; Potential | ||||||
| Topological domain | 711 – 725 | 15 | Cytoplasmic Potential | ||||||
| Transmembrane | 726 – 748 | 23 | Helical; Potential | ||||||
| Topological domain | 749 – 777 | 29 | Extracellular Potential | ||||||
| Transmembrane | 778 – 797 | 20 | Helical; Potential | ||||||
| Topological domain | 798 – 822 | 25 | Cytoplasmic Potential | ||||||
| Transmembrane | 823 – 847 | 25 | Helical; Potential | ||||||
| Topological domain | 848 – 881 | 34 | Extracellular Potential | ||||||
| Transmembrane | 882 – 901 | 20 | Helical; Potential | ||||||
| Topological domain | 902 – 949 | 48 | Cytoplasmic Potential | ||||||
| Transmembrane | 950 – 967 | 18 | Helical; Potential | ||||||
| Topological domain | 968 – 970 | 3 | Extracellular Potential | ||||||
| Transmembrane | 971 – 986 | 16 | Helical; Potential | ||||||
| Topological domain | 987 – 1079 | 93 | Cytoplasmic Potential | ||||||
| Region | 748 – 779 | 32 | Interaction with CA4 By similarity | ||||||
| Region | 1002 – 1004 | 3 | CA2-binding By similarity | ||||||
| Region | 1030 – 1033 | 4 | CA2-binding By similarity | ||||||
| Region | 1057 – 1059 | 3 | Required for basolateral targeting By similarity | ||||||
| Compositional bias | 1009 – 1024 | 16 | Lys-rich | ||||||
Amino acid modifications | |||||||||
| Modified residue | 30 | 1 | Phosphotyrosine Ref.12 | ||||||
| Modified residue | 254 | 1 | Phosphothreonine Ref.11 Ref.14 | ||||||
| Modified residue | 255 | 1 | Phosphoserine Ref.11 | ||||||
| Modified residue | 257 | 1 | Phosphoserine Ref.14 | ||||||
| Modified residue | 262 | 1 | Phosphoserine Ref.14 | ||||||
| Modified residue | 1026 | 1 | Phosphoserine; by PKA By similarity | ||||||
| Modified residue | 1029 | 1 | Phosphoserine Ref.14 | ||||||
| Modified residue | 1034 | 1 | Phosphoserine Ref.13 Ref.14 | ||||||
| Glycosylation | 641 | 1 | N-linked (GlcNAc...) By similarity | ||||||
| Glycosylation | 661 | 1 | N-linked (GlcNAc...) By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 44 | 44 | Missing in isoform 2 and isoform 3. | VSP_016709 | |||||
| Alternative sequence | 45 – 85 | 41 | HKRKA…LKPLI → MSTENVEGKPNNLGERGRAR SSTFLRVFQPMFNHSIFTSA V in isoform 2 and isoform 3. | VSP_016710 | |||||
| Alternative sequence | 185 – 201 | 17 | MIADH…KPDLK → LLGESRKVIRPAGFIRP in isoform 3. | VSP_016711 | |||||
| Alternative sequence | 202 – 1079 | 878 | Missing in isoform 3. | VSP_016712 | |||||
Experimental info | |||||||||
| Sequence conflict | 388 | 1 | T → A in AAC40160. Ref.1 | ||||||
| Sequence conflict | 546 | 1 | H → N in AAC40160. Ref.1 | ||||||
| Sequence conflict | 560 | 1 | W → R in AAC40160. Ref.1 | ||||||
| Sequence conflict | 564 | 1 | M → L in AAC40160. Ref.1 | ||||||
| Sequence conflict | 567 | 1 | V → I in AAC40160. Ref.1 | ||||||
| Sequence conflict | 589 | 1 | S → P in AAC40160. Ref.1 | ||||||
| Sequence conflict | 740 | 1 | C → G in AAC40160. Ref.1 | ||||||
| Sequence conflict | 775 | 1 | G → E in AAC40160. Ref.1 | ||||||
| Sequence conflict | 814 | 1 | K → Q in AAC40160. Ref.1 | ||||||
| Sequence conflict | 832 | 1 | V → I in AAC40160. Ref.1 | ||||||
| Sequence conflict | 835 | 1 | F → L in AAC40160. Ref.1 | ||||||
| Sequence conflict | 848 | 1 | S → F in AAD31036. Ref.2 | ||||||
| Sequence conflict | 876 | 1 | Q → P in AAD31036. Ref.2 | ||||||
| Sequence conflict | 884 | 1 | F → L in AAC40160. Ref.1 | ||||||
| Sequence conflict | 901 | 1 | P → R in AAD31036. Ref.2 | ||||||
| Sequence conflict | 909 – 910 | 2 | FL → SW in AAD31036. Ref.2 | ||||||
Sequences
| ||||||||||||||||||||||||||||||
References
| « Hide 'large scale' references | |
| [1] | "Molecular cloning, chromosomal localization, tissue distribution, and functional expression of the human pancreatic sodium bicarbonate cotransporter." Abuladze N., Lee I., Newman D., Hwang J., Boorer K., Pushkin A., Kurtz I. J. Biol. Chem. 273:17689-17695(1998) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), TISSUE SPECIFICITY. Tissue: Pancreas. |
| [2] | "Molecular and functional evidence for electrogenic and electroneutral Na(+)-HCO(3)(-) cotransporters in murine duodenum." Praetorius J., Hager H., Nielsen S., Aalkjaer C., Friis U.G., Ainsworth M.A., Johansen T. Am. J. Physiol. 280:G332-G343(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), TISSUE SPECIFICITY, SUBCELLULAR LOCATION. Strain: C57BL/6. Tissue: Duodenum. |
| [3] | "The transcriptional landscape of the mammalian genome." Carninci P., Kasukawa T., Katayama S., Gough J., Frith M.C., Maeda N., Oyama R., Ravasi T., Lenhard B., Wells C., Kodzius R., Shimokawa K., Bajic V.B., Brenner S.E., Batalov S., Forrest A.R., Zavolan M., Davis M.J. Hayashizaki Y.Science 309:1559-1563(2005) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3), NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 1-400 (ISOFORM 1). Strain: C57BL/6J. Tissue: Kidney and Medulla oblongata. |
| [4] | Lubec G., Kang S.U. Submitted (APR-2007) to UniProtKB Cited for: PROTEIN SEQUENCE OF 1-9; 60-67; 168-174; 323-331; 343-359; 607-618; 753-766; 857-869 AND 935-943, MASS SPECTROMETRY. Strain: C57BL/6. Tissue: Brain. |
| [5] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 382-1079. Strain: FVB/N. Tissue: Kidney. |
| [6] | "Role of glycosylation in the renal electrogenic Na+-HCO3-cotransporter (NBCe1)." Choi I., Hu L., Rojas J.D., Schmitt B.M., Boron W.F. Am. J. Physiol. 284:F1199-F1206(2003) [PubMed] [Europe PMC] [Abstract] Cited for: GLYCOSYLATION. |
| [7] | "cAMP-mediated regulation of murine intestinal/pancreatic Na+/HCO3-cotransporter subtype pNBC1." Bachmann O., Rossmann H., Berger U.V., Colledge W.H., Ratcliff R., Evans M.J., Gregor M., Seidler U. Am. J. Physiol. 284:G37-G45(2003) [PubMed] [Europe PMC] [Abstract] Cited for: REGULATION BY CAMP, TISSUE SPECIFICITY. |
| [8] | "Expression of Na+/HCO3- cotransporter and its role in pH regulation in mouse parotid acinar cells." Kim Y.-B., Yang B.H., Piao Z.G., Oh S.B., Kim J.S., Park K. Biochem. Biophys. Res. Commun. 304:593-598(2003) [PubMed] [Europe PMC] [Abstract] Cited for: TISSUE SPECIFICITY. |
| [9] | "Direct extracellular interaction between carbonic anhydrase IV and the human NBC1 sodium/bicarbonate co-transporter." Alvarez B.V., Loiselle F.B., Supuran C.T., Schwartz G.J., Casey J.R. Biochemistry 42:12321-12329(2003) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH CA4. |
| [10] | "Molecular mechanism of kNBC1-carbonic anhydrase II interaction in proximal tubule cells." Pushkin A., Abuladze N., Gross E., Newman D., Tatishchev S., Lee I., Fedotoff O., Bondar G., Azimov R., Ngyuen M., Kurtz I. J. Physiol. (Lond.) 559:55-65(2004) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH CA2. |
| [11] | "Specific phosphopeptide enrichment with immobilized titanium ion affinity chromatography adsorbent for phosphoproteome analysis." Zhou H., Ye M., Dong J., Han G., Jiang X., Wu R., Zou H. J. Proteome Res. 7:3957-3967(2008) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-254 AND SER-255, MASS SPECTROMETRY. Tissue: Liver. |
| [12] | "Large-scale identification and evolution indexing of tyrosine phosphorylation sites from murine brain." Ballif B.A., Carey G.R., Sunyaev S.R., Gygi S.P. J. Proteome Res. 7:311-318(2008) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT TYR-30, MASS SPECTROMETRY. Tissue: Brain. |
| [13] | "Protein phosphorylation and expression profiling by Yin-yang multidimensional liquid chromatography (Yin-yang MDLC) mass spectrometry." Dai J., Jin W.-H., Sheng Q.-H., Shieh C.-H., Wu J.-R., Zeng R. J. Proteome Res. 6:250-262(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-1034, MASS SPECTROMETRY. Tissue: Liver. |
| [14] | "Large-scale phosphorylation analysis of mouse liver." Villen J., Beausoleil S.A., Gerber S.A., Gygi S.P. Proc. Natl. Acad. Sci. U.S.A. 104:1488-1493(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-254; SER-257; SER-262; SER-1029 AND SER-1034, MASS SPECTROMETRY. Tissue: Liver. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF020195 mRNA. Translation: AAC40160.1. AF141934 mRNA. Translation: AAD31036.3. AK085387 mRNA. Translation: BAC39437.1. AK140443 mRNA. Translation: BAE24389.1. BC026592 mRNA. Translation: AAH26592.1. |
| IPI | IPI00314749. IPI00405057. IPI00662028. |
| PIR | T14031. |
| RefSeq | NP_001129732.1. NM_001136260.1. NP_061230.2. NM_018760.2. |
| UniGene | Mm.41044. |
3D structure databases | |
| ProteinModelPortal | O88343. |
| SMR | O88343. Positions 453-493. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | O88343. 2 interactions. |
| STRING | 10090.ENSMUSP00000121744. |
PTM databases | |
| PhosphoSite | O88343. |
Proteomic databases | |
| PaxDb | O88343. |
| PRIDE | O88343. |
Protocols and materials databases | |
| DNASU | 54403. |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENSMUST00000113216; ENSMUSP00000108842; ENSMUSG00000060961. ENSMUST00000130041; ENSMUSP00000118413; ENSMUSG00000060961. ENSMUST00000148750; ENSMUSP00000119325; ENSMUSG00000060961. |
| GeneID | 54403. |
| KEGG | mmu:54403. |
| UCSC | uc008yak.1. mouse. uc012dyd.1. mouse. |
Organism-specific databases | |
| CTD | 8671. |
| MGI | MGI:1927555. Slc4a4. |
Phylogenomic databases | |
| eggNOG | NOG251607. |
| GeneTree | ENSGT00560000076851. |
| HOGENOM | HOG000280684. |
| HOVERGEN | HBG004326. |
| InParanoid | O88343. |
| KO | K13575. |
| OrthoDB | EOG4320XB. |
Gene expression databases | |
| ArrayExpress | O88343. |
| Bgee | O88343. |
| Genevestigator | O88343. |
| GermOnline | ENSMUSG00000060961. Mus musculus. |
Family and domain databases | |
| Gene3D | 3.40.1100.10. 1 hit. |
| InterPro | IPR013769. Band3_cytoplasmic_dom. IPR011531. HCO3_transpt_C. IPR003020. HCO3_transpt_euk. IPR003024. Na/HCO3_transpt. IPR016152. PTrfase/Anion_transptr. [Graphical view] |
| PANTHER | PTHR11453. PTHR11453. 1 hit. |
| Pfam | PF07565. Band_3_cyto. 1 hit. PF00955. HCO3_cotransp. 1 hit. [Graphical view] |
| PRINTS | PR01231. HCO3TRNSPORT. PR01232. NAHCO3TRSPRT. |
| SUPFAM | SSF55804. PTrfase/Anion_transptr. 1 hit. |
| TIGRFAMs | TIGR00834. ae. 1 hit. |
| ProtoNet | Search... |
Other | |
| ChiTaRS | SLC4A4. mouse. |
| NextBio | 311268. |
| SOURCE | Search... |
Entry information
| Entry name | S4A4_MOUSE | ||||||||
| Accession | Primary (citable) accession number: O88343 Secondary accession number(s): Q3USE4 Q9R1C4 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
