Q9UHW9 (S12A6_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 127.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Solute carrier family 12 member 6 Alternative name(s): Electroneutral potassium-chloride cotransporter 3 K-Cl cotransporter 3 | ||||
| Gene names |
| ||||
| Organism | Homo sapiens (Human) [Reference proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 1150 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Mediates electroneutral potassium-chloride cotransport. May be activated by cell swelling. May contribute to cell volume homeostasis in single cells. |
| Enzyme regulation | Activated by N-ethylmaleimide (NEM). Inhibited by DIOA, bumetanide and furosemide. Inhibited by WNK3. Ref.15 |
| Subunit structure | Homomultimer and heteromultimer with other K-Cl cotransporters By similarity. Ref.12 |
| Subcellular location | Basolateral cell membrane; Multi-pass membrane protein By similarity. |
| Tissue specificity | Highly expressed in heart, brain and kidney. Detected at lower levels in skeletal muscle, placenta, lung and pancreas. Detected in umbilical vein endothelial cells. Isoform 2 is more abundant in kidney. Isoform 5 is testis specific. Expressed in the proximal tubule of the kidney (at protein level). Ref.5 |
| Induction | |
| Post-translational modification | |
| Involvement in disease | Agenesis of the corpus callosum, with peripheral neuropathy (ACCPN) [MIM:218000]: A disease that is characterized by severe progressive sensorimotor neuropathy, mental retardation, dysmorphic features and complete or partial agenesis of the corpus callosum. |
| Sequence similarities | Belongs to the SLC12A transporter family. |
| Biophysicochemical properties | Kinetic parameters: KM=10.7 mM for extracellular Rb+ (isoform 1) Ref.5 KM=7.3 mM for extracellular Cl- (isoform 1) KM=17.2 mM for extracellular Rb+ (isoform 2) KM=8.2 mM for extracellular Cl- (isoform 2) |
Ontologies
| Keywords | |
|---|---|
| Biological process | Ion transport Potassium transport Symport Transport |
| Cellular component | Cell membrane Membrane |
| Coding sequence diversity | Alternative promoter usage Alternative splicing Polymorphism |
| Domain | Transmembrane Transmembrane helix |
| Ligand | Potassium |
| PTM | Glycoprotein Phosphoprotein |
| Technical term | Complete proteome Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | angiogenesis Non-traceable author statement Ref.2. Source: UniProtKB cellular hypotonic salinity responseInferred from direct assay Ref.5. Source: UniProtKB potassium ion transportInferred from electronic annotation. Source: UniProtKB-KW |
| Cellular_component | basolateral plasma membrane Inferred from sequence or structural similarity. Source: UniProtKB integral to membraneNon-traceable author statement Ref.2. Source: UniProtKB |
| Molecular_function | potassium:chloride symporter activity Inferred from direct assay Ref.2Ref.5. Source: UniProtKB |
| Complete GO annotation... | |
Alternative products
| This entry describes 6 isoforms produced by alternative promoter usage and alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q9UHW9-1) Also known as: KCC3a; 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: Q9UHW9-2) Also known as: KCC3b; The sequence of this isoform differs from the canonical sequence as follows: 1-51: Missing. 52-90: PETSRSEPMS...RTSHPQDVIE → MPHFTVTKVE...KARIQDSDEP | ||||||
| Note: Produced by alternative promoter usage. | ||||||
| Isoform 3 (identifier: Q9UHW9-3) Also known as: KCC3a-X2M; The sequence of this isoform differs from the canonical sequence as follows: 91-105: Missing. | ||||||
| Note: Does not differ in the osmotic set point of swelling activation but, activation is more rapid. | ||||||
| Isoform 4 (identifier: Q9UHW9-4) Also known as: KCC3a-S3; The sequence of this isoform differs from the canonical sequence as follows: 1-9: Missing. | ||||||
| Isoform 5 (identifier: Q9UHW9-5) Also known as: KCC3a-S; KCC3a-S1; KCC3a-S2; The sequence of this isoform differs from the canonical sequence as follows: 1-59: Missing. | ||||||
| Note: Does not differ in the osmotic set point of swelling activation but, activation is more rapid. | ||||||
| Isoform 6 (identifier: Q9UHW9-6) Also known as: KCC3b-X2M; The sequence of this isoform differs from the canonical sequence as follows: 1-51: Missing. 52-90: PETSRSEPMS...RTSHPQDVIE → MPHFTVTKVE...KARIQDSDEP 91-105: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1150 | 1150 | Solute carrier family 12 member 6 | PRO_0000178037 | |||||
Regions | |||||||||
| Topological domain | 1 – 185 | 185 | Cytoplasmic Potential | ||||||
| Transmembrane | 186 – 208 | 23 | Helical; Potential | ||||||
| Topological domain | 209 – 223 | 15 | Extracellular Potential | ||||||
| Transmembrane | 224 – 245 | 22 | Helical; Potential | ||||||
| Topological domain | 246 – 271 | 26 | Cytoplasmic Potential | ||||||
| Transmembrane | 272 – 295 | 24 | Helical; Potential | ||||||
| Topological domain | 296 – 318 | 23 | Extracellular Potential | ||||||
| Transmembrane | 319 – 343 | 25 | Helical; Potential | ||||||
| Topological domain | 344 – 346 | 3 | Cytoplasmic Potential | ||||||
| Transmembrane | 347 – 371 | 25 | Helical; Potential | ||||||
| Topological domain | 372 – 479 | 108 | Extracellular Potential | ||||||
| Transmembrane | 480 – 501 | 22 | Helical; Potential | ||||||
| Topological domain | 502 – 515 | 14 | Cytoplasmic Potential | ||||||
| Transmembrane | 516 – 543 | 28 | Helical; Potential | ||||||
| Topological domain | 544 – 557 | 14 | Extracellular Potential | ||||||
| Transmembrane | 558 – 581 | 24 | Helical; Potential | ||||||
| Topological domain | 582 – 620 | 39 | Cytoplasmic Potential | ||||||
| Transmembrane | 621 – 644 | 24 | Helical; Potential | ||||||
| Topological domain | 645 – 647 | 3 | Extracellular Potential | ||||||
| Transmembrane | 648 – 670 | 23 | Helical; Potential | ||||||
| Topological domain | 671 – 676 | 6 | Cytoplasmic Potential | ||||||
| Transmembrane | 677 – 695 | 19 | Helical; Potential | ||||||
| Topological domain | 696 | 1 | Extracellular Potential | ||||||
| Transmembrane | 697 – 719 | 23 | Helical; Potential | ||||||
| Topological domain | 720 – 1150 | 431 | Cytoplasmic Potential | ||||||
| Compositional bias | 227 – 230 | 4 | Poly-Cys | ||||||
Amino acid modifications | |||||||||
| Modified residue | 32 | 1 | Phosphoserine Ref.14 | ||||||
| Modified residue | 1007 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 1032 | 1 | Phosphoserine Ref.13 Ref.16 | ||||||
| Glycosylation | 379 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 398 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 411 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 428 | 1 | N-linked (GlcNAc...) Potential | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 59 | 59 | Missing in isoform 5. | VSP_041387 | |||||
| Alternative sequence | 1 – 51 | 51 | Missing in isoform 2 and isoform 6. | VSP_006115 | |||||
| Alternative sequence | 1 – 9 | 9 | Missing in isoform 4. | VSP_041388 | |||||
| Alternative sequence | 52 – 90 | 39 | PETSR…QDVIE → MPHFTVTKVEDPEEGAAASI SQEPSLADIKARIQDSDEP in isoform 2 and isoform 6. | VSP_006116 | |||||
| Alternative sequence | 91 – 105 | 15 | Missing in isoform 3 and isoform 6. | VSP_041389 | |||||
| Natural variant | 415 | 1 | F → S. Corresponds to variant rs2705339 [ dbSNP | Ensembl ]. | VAR_014960 | |||||
Experimental info | |||||||||
| Sequence conflict | 802 | 1 | E → H in AAF24986. Ref.1 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Molecular cloning and functional characterization of KCC3, a new K-Cl cotransporter." Race J.E., Makhlouf F.N., Logue P.J., Wilson F.H., Dunham P.B., Holtzman E.J. Am. J. Physiol. 277:C1210-C1219(1999) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), TOPOLOGY. Tissue: Placenta. |
| [2] | "Cloning, characterization, and chromosomal location of a novel human K+-Cl- cotransporter." Hiki K., D'Andrea R.J., Furze J., Crawford J., Woollatt E., Sutherland G.R., Vadas M.A., Gamble J.R. J. Biol. Chem. 274:10661-10667(1999) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), GLYCOSYLATION, REGULATION BY VEGF AND TNF. Tissue: Umbilical vein. |
| [3] | "Cloning and characterization of KCC3 and KCC4, new members of the cation-chloride cotransporter gene family." Mount D.B., Mercado A., Song L., Xu J., George A.L. Jr., Delpire E., Gamba G. J. Biol. Chem. 274:16355-16362(1999) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [4] | "The K-Cl cotransporter KCC3 is mutant in a severe peripheral neuropathy associated with agenesis of the corpus callosum." Howard H.C., Mount D.B., Rochefort D., Byun N., Dupre N., Lu J., Fan X., Song L., Riviere J.-B., Prevost C., Horst J., Simonati A., Lemcke B., Welch R., England R., Zhan F.Q., Mercado A., Siesser W.B. Rouleau G.A.Nat. Genet. 32:384-392(2002) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], ALTERNATIVE SPLICING (ISOFORMS 1 AND 2), GLYCOSYLATION, DISEASE. |
| [5] | "NH2-terminal heterogeneity in the KCC3 K+-Cl- cotransporter." Mercado A., Vazquez N., Song L., Cortes R., Enck A.H., Welch R., Delpire E., Gamba G., Mount D.B. Am. J. Physiol. 289:F1246-1261(2005) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 3; 4; 5), ALTERNATIVE SPLICING (ISOFORM 6), ALTERNATIVE PROMOTER USAGE, TISSUE SPECIFICITY, BIOPHYSICOCHEMICAL PROPERTIES. |
| [6] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2). Tissue: Uterus. |
| [7] | "Analysis of the DNA sequence and duplication history of human chromosome 15." Zody M.C., Garber M., Sharpe T., Young S.K., Rowen L., O'Neill K., Whittaker C.A., Kamal M., Chang J.L., Cuomo C.A., Dewar K., FitzGerald M.G., Kodira C.D., Madan A., Qin S., Yang X., Abbasi N., Abouelleil A. Nusbaum C.Nature 440:671-675(2006) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [8] | Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L., Mobarry C.M., Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R., Flanigan M.J., Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V., Hannenhalli S., Turner R. Venter J.C.Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [9] | "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] (ISOFORM 2). Tissue: Brain. |
| [10] | Guo J.H., Yu L. Submitted (JAN-2002) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 70-1150 (ISOFORM 1). Tissue: Testis. |
| [11] | "The full-ORF clone resource of the German cDNA consortium." Bechtel S., Rosenfelder H., Duda A., Schmidt C.P., Ernst U., Wellenreuther R., Mehrle A., Schuster C., Bahr A., Bloecker H., Heubner D., Hoerlein A., Michel G., Wedler H., Koehrer K., Ottenwaelder B., Poustka A., Wiemann S., Schupp I. BMC Genomics 8:399-399(2007) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 137-1150 (ISOFORM 1). Tissue: Testis. |
| [12] | "A dominant negative mutant of the KCC1 K-Cl cotransporter: both N- and C-terminal cytoplasmic domains are required for K-Cl cotransport activity." Casula S., Shmukler B.E., Wilhelm S., Stuart-Tilley A.K., Su W., Chernova M.N., Brugnara C., Alper S.L. J. Biol. Chem. 276:41870-41878(2001) [PubMed] [Europe PMC] [Abstract] Cited for: SUBUNIT. |
| [13] | "A quantitative atlas of mitotic phosphorylation." Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E., Elledge S.J., Gygi S.P. Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-1032, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [14] | "Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions." Mayya V., Lundgren D.H., Hwang S.-I., Rezaul K., Wu L., Eng J.K., Rodionov V., Han D.K. Sci. Signal. 2:RA46-RA46(2009) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-32, MASS SPECTROMETRY. Tissue: Leukemic T-cell. |
| [15] | "Similar Effects of all WNK3 Variants upon SLC12 Cotransporters." Cruz-Rangel S., Melo Z., Vazquez N., Meade P., Bobadilla N.A., Pasantes-Morales H., Gamba G., Mercado A. Am. J. Physiol. 301:C601-C608(2011) [PubMed] [Europe PMC] [Abstract] Cited for: ENZYME REGULATION. |
| [16] | "System-wide temporal characterization of the proteome and phosphoproteome of human embryonic stem cell differentiation." Rigbolt K.T., Prokhorova T.A., Akimov V., Henningsen J., Johansen P.T., Kratchmarova I., Kassem M., Mann M., Olsen J.V., Blagoev B. Sci. Signal. 4:RS3-RS3(2011) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-1032, MASS SPECTROMETRY. |
| + | Additional computationally mapped references. |
Web resources
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF116242 mRNA. Translation: AAF24986.1. AF108831 mRNA. Translation: AAD25337.1. AF105366 mRNA. Translation: AAD39742.1. AF314956 AF314955 Genomic DNA. Translation: AAM96215.1.AF314956 AF314955 Genomic DNA. Translation: AAM96216.1.AF531258 mRNA. Translation: AAQ10026.1. AF531259 mRNA. Translation: AAQ10027.1. AF531260 mRNA. Translation: AAQ10028.1. DQ138323 mRNA. Translation: ABA02873.1. AK315283 mRNA. Translation: BAG37692.1. AC021822 Genomic DNA. No translation available. AC079203 Genomic DNA. No translation available. CH471125 Genomic DNA. Translation: EAW92295.1. CH471125 Genomic DNA. Translation: EAW92297.1. CH471125 Genomic DNA. Translation: EAW92301.1. BC126241 mRNA. Translation: AAI26242.1. BC126243 mRNA. Translation: AAI26244.1. AF477977 mRNA. Translation: AAL85335.1. AL117500 mRNA. Translation: CAB55965.1. |
| IPI | IPI00220151. IPI00465299. IPI00783274. IPI00783541. IPI00797408. IPI01018802. |
| PIR | T17275. |
| RefSeq | NP_001035959.1. NM_001042494.1. NP_001035960.1. NM_001042495.1. NP_001035961.1. NM_001042496.1. NP_001035962.1. NM_001042497.1. NP_005126.1. NM_005135.2. NP_598408.1. NM_133647.1. |
| UniGene | Hs.510939. |
3D structure databases | |
| ProteinModelPortal | Q9UHW9. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | Q9UHW9. 2 interactions. |
| STRING | 9606.ENSP00000346112. |
Protein family/group databases | |
| TCDB | 2.A.30.5.3. cation-chloride cotransporter (CCC) family. |
PTM databases | |
| PhosphoSite | Q9UHW9. |
Polymorphism databases | |
| DMDM | 27151690. |
Proteomic databases | |
| PaxDb | Q9UHW9. |
| PRIDE | Q9UHW9. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000290209; ENSP00000290209; ENSG00000140199. ENST00000354181; ENSP00000346112; ENSG00000140199. ENST00000397702; ENSP00000380814; ENSG00000140199. ENST00000397707; ENSP00000380819; ENSG00000140199. ENST00000458406; ENSP00000387725; ENSG00000140199. ENST00000558589; ENSP00000452776; ENSG00000140199. ENST00000558667; ENSP00000453473; ENSG00000140199. ENST00000560611; ENSP00000454168; ENSG00000140199. |
| GeneID | 9990. |
| KEGG | hsa:9990. |
| UCSC | uc001zhw.3. human. uc001zhx.3. human. |
Organism-specific databases | |
| CTD | 9990. |
| GeneCards | GC15M034522. |
| HGNC | HGNC:10914. SLC12A6. |
| HPA | HPA034563. |
| MIM | 218000. phenotype. 604878. gene. |
| neXtProt | NX_Q9UHW9. |
| Orphanet | 1496. Corpus callosum agenesis - neuronopathy. |
| PharmGKB | PA35808. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | COG0531. |
| HOGENOM | HOG000092644. |
| HOVERGEN | HBG052852. |
| InParanoid | Q9UHW9. |
| KO | K14427. |
| OMA | WTLSFMG. |
| OrthoDB | EOG476JZG. |
| PhylomeDB | Q9UHW9. |
Enzyme and pathway databases | |
| Reactome | REACT_15518. Transmembrane transport of small molecules. |
Gene expression databases | |
| ArrayExpress | Q9UHW9. |
| Bgee | Q9UHW9. |
| CleanEx | HS_SLC12A6. |
| Genevestigator | Q9UHW9. |
| GermOnline | ENSG00000140199. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR004841. AA-permease_dom. IPR018491. K/Cl_cotranspt_1/3. IPR000076. KCL_cotranspt. IPR004842. Na/K/Cl_cotransptS. [Graphical view] |
| Pfam | PF00324. AA_permease. 2 hits. PF03522. KCl_Cotrans_1. 1 hit. [Graphical view] |
| PRINTS | PR01081. KCLTRNSPORT. |
| TIGRFAMs | TIGR00930. 2a30. 1 hit. |
| ProtoNet | Search... |
Other | |
| ChiTaRS | SLC12A6. human. |
| DrugBank | DB00761. Potassium Chloride. |
| GenomeRNAi | 9990. |
| NextBio | 37729. |
| SOURCE | Search... |
Entry information
| Entry name | S12A6_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9UHW9 Secondary accession number(s): A0AV76 Q9Y665 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 15 Human chromosome 15: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
