P51788 (CLCN2_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 124.
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: Chloride channel protein 2 Short name=ClC-2 | ||
| 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 | 898 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Voltage-gated chloride channel. Chloride channels have several functions including the regulation of cell volume; membrane potential stabilization, signal transduction and transepithelial transport. Ref.7 Ref.11 |
| Subcellular location | |
| Tissue specificity | Ubiquitously expressed. Moderately expressed in aortic and coronary vascular smooth muscle cells and expressed at a low level in aortic endothelial cells. Ref.6 |
| Involvement in disease | Epilepsy, idiopathic generalized 11 (EIG11) [MIM:607628]: A disorder characterized by recurring generalized seizures in the absence of detectable brain lesions and/or metabolic abnormalities. Generalized seizures arise diffusely and simultaneously from both hemispheres of the brain. Juvenile absence epilepsy 2 (JAE2) [MIM:607628]: A subtype of idiopathic generalized epilepsy characterized by onset occurring around puberty, absence seizures, generalized tonic-clonic seizures (GTCS), GTCS on awakening, and myoclonic seizures. Juvenile myoclonic epilepsy 8 (EJM8) [MIM:607628]: A subtype of idiopathic generalized epilepsy. Patients have afebrile seizures only, with onset in adolescence (rather than in childhood) and myoclonic jerks which usually occur after awakening and are triggered by sleep deprivation and fatigue. |
| Miscellaneous | The CLC channel family contains both chloride channels and proton-coupled anion transporters that exchange chloride or another anion for protons. The absence of conserved gating glutamate residues is typical for family members that function as channels By similarity. |
| Sequence similarities | Belongs to the chloride channel (TC 2.A.49) family. ClC-2/CLCN2 subfamily. [View classification] Contains 2 CBS domains. |
| Sequence caution | The sequence AAH21578.1 differs from that shown. Reason: Erroneous translation. Wrong choice of frame. |
Ontologies
| Keywords | |
|---|---|
| Biological process | Ion transport Transport |
| Cellular component | Membrane |
| Coding sequence diversity | Alternative splicing Polymorphism |
| Disease | Disease mutation Epilepsy |
| Domain | CBS domain Repeat Transmembrane Transmembrane helix |
| Ligand | Chloride |
| Molecular function | Chloride channel Ion channel Voltage-gated channel |
| Technical term | Complete proteome Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | cell differentiation involved in salivary gland development Inferred from electronic annotation. Source: Compara retina development in camera-type eyeInferred from electronic annotation. Source: Compara |
| Cellular_component | chloride channel complex Inferred from electronic annotation. Source: UniProtKB-KW |
| Molecular_function | voltage-gated chloride channel activity Traceable author statement Ref.1. Source: ProtInc |
| Complete GO annotation... | |
Alternative products
| This entry describes 5 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: P51788-1) 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: P51788-2) The sequence of this isoform differs from the canonical sequence as follows: 1-359: Missing. 443-485: FWMSALATTI...SMAAWFPDGI → HLGVWWVKAW...WSGQLRWQER 486-898: Missing. | ||||||
| Note: May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. | ||||||
| Isoform 3 (identifier: P51788-3) The sequence of this isoform differs from the canonical sequence as follows: 466-482: Missing. | ||||||
| Isoform 4 (identifier: P51788-4) The sequence of this isoform differs from the canonical sequence as follows: 74-117: Missing. | ||||||
| Note: No experimental confirmation available. | ||||||
| Isoform 5 (identifier: P51788-5) The sequence of this isoform differs from the canonical sequence as follows: 806-834: Missing. | ||||||
| Note: No experimental confirmation available. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 898 | 898 | Chloride channel protein 2 | PRO_0000094433 | |||||
Regions | |||||||||
| Topological domain | 1 – 87 | 87 | Cytoplasmic By similarity | ||||||
| Transmembrane | 88 – 121 | 34 | Helical; By similarity | ||||||
| Transmembrane | 130 – 155 | 26 | Helical; By similarity | ||||||
| Intramembrane | 164 – 171 | 8 | Helical; Potential | ||||||
| Transmembrane | 180 – 198 | 19 | Helical; By similarity | ||||||
| Transmembrane | 205 – 223 | 19 | Helical; By similarity | ||||||
| Intramembrane | 239 – 251 | 13 | Helical; By similarity | ||||||
| Intramembrane | 255 – 263 | 9 | Helical; By similarity | ||||||
| Transmembrane | 275 – 295 | 21 | Helical; By similarity | ||||||
| Transmembrane | 321 – 349 | 29 | Helical; By similarity | ||||||
| Transmembrane | 358 – 377 | 20 | Helical; By similarity | ||||||
| Transmembrane | 429 – 449 | 21 | Helical; By similarity | ||||||
| Transmembrane | 457 – 480 | 24 | Helical; By similarity | ||||||
| Intramembrane | 497 – 511 | 15 | Helical; By similarity | ||||||
| Intramembrane | 512 – 513 | 2 | Note=Loop between two helices; By similarity | ||||||
| Intramembrane | 514 – 525 | 12 | Helical; By similarity | ||||||
| Intramembrane | 526 – 530 | 5 | Note=Loop between two helices; By similarity | ||||||
| Transmembrane | 531 – 548 | 18 | Helical; By similarity | ||||||
| Topological domain | 549 – 898 | 350 | Cytoplasmic By similarity | ||||||
| Domain | 584 – 642 | 59 | CBS 1 | ||||||
| Domain | 790 – 850 | 61 | CBS 2 | ||||||
| Motif | 161 – 165 | 5 | Selectivity filter part_1 By similarity | ||||||
| Motif | 203 – 207 | 5 | Selectivity filter part_2 By similarity | ||||||
| Motif | 457 – 461 | 5 | Selectivity filter part_3 By similarity | ||||||
| Compositional bias | 2 – 6 | 5 | Poly-Ala | ||||||
Sites | |||||||||
| Binding site | 162 | 1 | Chloride By similarity | ||||||
| Binding site | 459 | 1 | Chloride; via amide nitrogen By similarity | ||||||
| Binding site | 553 | 1 | Chloride By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 359 | 359 | Missing in isoform 2. | VSP_007831 | |||||
| Alternative sequence | 74 – 117 | 44 | Missing in isoform 4. | VSP_045457 | |||||
| Alternative sequence | 443 – 485 | 43 | FWMSA…FPDGI → HLGVWWVKAWLPGSQMEFIR TAAPTGLCLGATLWSGQLRW QER in isoform 2. | VSP_007832 | |||||
| Alternative sequence | 466 – 482 | 17 | Missing in isoform 3. | VSP_036456 | |||||
| Alternative sequence | 486 – 898 | 413 | Missing in isoform 2. | VSP_036455 | |||||
| Alternative sequence | 806 – 834 | 29 | Missing in isoform 5. | VSP_045458 | |||||
| Natural variant | 48 | 1 | P → R Reduces channel activity. Ref.9 | VAR_057886 | |||||
| Natural variant | 68 | 1 | R → H Reduces channel activity. Ref.9 | VAR_057887 | |||||
| Natural variant | 199 | 1 | G → A No effect. Ref.9 | VAR_057888 | |||||
| Natural variant | 235 | 1 | R → Q Confers susceptibility to juvenile myoclonic epilepsy type 8; the mutant channel has accelerated deactivation rates compared to wild-type, but normal activation and peak current. Ref.11 | VAR_057889 | |||||
| Natural variant | 577 | 1 | R → Q Confers susceptibility to idiopathic generalized epilepsy type 11; the mutant channel has accelerated deactivation rates compared to wild-type, but normal activation and peak current. Ref.11 | VAR_057890 | |||||
| Natural variant | 644 | 1 | R → C No effect. Ref.11 | VAR_057891 | |||||
| Natural variant | 646 | 1 | R → Q Reduces channel activity. Ref.9 | VAR_057892 | |||||
| Natural variant | 668 | 1 | T → S. Ref.1 Ref.3 Ref.9 Corresponds to variant rs9820367 [ dbSNP | Ensembl ]. | VAR_054550 | |||||
| Natural variant | 715 | 1 | G → E May confer susceptibility to juvenile absence epilepsy type 2. Ref.8 Corresponds to variant rs28938470 [ dbSNP | Ensembl ]. | VAR_015989 | |||||
| Natural variant | 718 | 1 | E → D. Corresponds to variant rs2228292 [ dbSNP | Ensembl ]. | VAR_054551 | |||||
| Natural variant | 719 | 1 | S → L in a patient with childhood absence epilepsy. Ref.10 | VAR_058426 | |||||
| Natural variant | 725 | 1 | R → W Slightly faster channel activation. Ref.9 | VAR_057893 | |||||
| Natural variant | 747 | 1 | R → H Slightly faster channel activation. Ref.9 | VAR_057894 | |||||
Experimental info | |||||||||
| Sequence conflict | 17 | 1 | Y → H in AAB34722. Ref.1 | ||||||
| Sequence conflict | 537 | 1 | A → V in AAH21578. Ref.5 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Cloning of a putative human voltage-gated chloride channel (ClC-2) cDNA widely expressed in human tissues." Cid L.P., Montrose-Rafizadeh C., Smith D.I., Guggino W.B., Cutting G.R. Hum. Mol. Genet. 4:407-413(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), VARIANT SER-668. Tissue: Placenta. |
| [2] | Rae J.L., Shepard A.R. Submitted (SEP-1997) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Lens epithelium. |
| [3] | "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] (ISOFORMS 4 AND 5), VARIANT SER-668. Tissue: Testis. |
| [4] | "The DNA sequence, annotation and analysis of human chromosome 3." Muzny D.M., Scherer S.E., Kaul R., Wang J., Yu J., Sudbrak R., Buhay C.J., Chen R., Cree A., Ding Y., Dugan-Rocha S., Gill R., Gunaratne P., Harris R.A., Hawes A.C., Hernandez J., Hodgson A.V., Hume J. Gibbs R.A.Nature 440:1194-1198(2006) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [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] (ISOFORMS 2 AND 3). Tissue: Lung and Uterus. |
| [6] | "Expression of CLCN voltage-gated chloride channel genes in human blood vessels." Lamb F.S., Clayton G.H., Liu B.-X., Smith R.L., Barna T.J., Schutte B.C. J. Mol. Cell. Cardiol. 31:657-666(1999) [PubMed] [Europe PMC] [Abstract] Cited for: TISSUE SPECIFICITY. Tissue: Aortic endothelium and Vascular smooth muscle. |
| [7] | "Voltage-dependent and -independent titration of specific residues accounts for complex gating of a ClC chloride channel by extracellular protons." Niemeyer M.I., Cid L.P., Yusef Y.R., Briones R., Sepulveda F.V. J. Physiol. (Lond.) 587:1387-1400(2009) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [8] | "Mutations in CLCN2 encoding a voltage-gated chloride channel are associated with idiopathic generalized epilepsies." Haug K., Warnstedt M., Alekov A.K., Sander T., Ramirez A., Poser B., Maljevic S., Hebeisen S., Kubisch C., Rebstock J., Horvath S., Hallmann K., Dullinger J.S., Rau B., Haverkamp F., Beyenburg S., Schulz H., Janz D. Heils A.Nat. Genet. 33:527-532(2003) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT GLU-715. |
| [9] | "Alterations in the cytoplasmic domain of CLCN2 result in altered gating kinetics." Paul J., Jeyaraj S., Huber S.M., Seebohm G., Boehmer C., Lang F., Kremsner P.G., Kun J.F.J. Cell. Physiol. Biochem. 20:441-454(2007) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS ARG-48; HIS-68; ALA-199; GLN-646; SER-668; TRP-725 AND HIS-747, CHARACTERIZATION OF VARIANTS ARG-48; HIS-68; ALA-199; GLN-646; TRP-725 AND HIS-747. |
| [10] | "Clinical and genetic familial study of a large cohort of Italian children with idiopathic epilepsy." Combi R., Grioni D., Contri M., Redaelli S., Redaelli F., Bassi M.T., Barisani D., Lavitrano M.L., Tredici G., Tenchini M.L., Bertolini M., Dalpra L. Brain Res. Bull. 79:89-96(2009) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT LEU-719. |
| [11] | "Two novel CLCN2 mutations accelerating chloride channel deactivation are associated with idiopathic generalized epilepsy." Saint-Martin C., Gauvain G., Teodorescu G., Gourfinkel-An I., Fedirko E., Weber Y.G., Maljevic S., Ernst J.-P., Garcia-Olivares J., Fahlke C., Nabbout R., LeGuern E., Lerche H., Christophe Poncer J., Depienne C. Hum. Mutat. 30:397-405(2009) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS GLN-235; GLN-577 AND CYS-644, CHARACTERIZATION OF VARIANTS GLN-235; GLN-577 AND CYS-644, FUNCTION. |
| + | Additional computationally mapped references. |
Web resources
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | S77770 mRNA. Translation: AAB34722.2. AF026004 mRNA. Translation: AAB88807.1. AK298952 mRNA. Translation: BAG61051.1. AK302759 mRNA. Translation: BAG63970.1. AC078797 Genomic DNA. No translation available. BC021578 mRNA. Translation: AAH21578.1. Sequence problems. BC072004 mRNA. Translation: AAH72004.1. |
| IPI | IPI00020504. IPI00290972. IPI00922766. IPI00925821. IPI00926166. |
| RefSeq | NP_001164558.1. NM_001171087.2. NP_001164559.1. NM_001171088.2. NP_001164560.1. NM_001171089.2. NP_004357.3. NM_004366.5. |
| UniGene | Hs.436847. |
3D structure databases | |
| ProteinModelPortal | P51788. |
| SMR | P51788. Positions 93-651, 766-841. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | P51788. 2 interactions. |
| STRING | 9606.ENSP00000265593. |
PTM databases | |
| PhosphoSite | P51788. |
Polymorphism databases | |
| DMDM | 288558807. |
Proteomic databases | |
| PaxDb | P51788. |
| PRIDE | P51788. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000265593; ENSP00000265593; ENSG00000114859. ENST00000344937; ENSP00000345056; ENSG00000114859. ENST00000423355; ENSP00000412226; ENSG00000114859. ENST00000434054; ENSP00000400425; ENSG00000114859. ENST00000457512; ENSP00000391928; ENSG00000114859. |
| GeneID | 1181. |
| KEGG | hsa:1181. |
| UCSC | uc003foi.3. human. uc010hya.2. human. |
Organism-specific databases | |
| CTD | 1181. |
| GeneCards | GC03M184063. |
| HGNC | HGNC:2020. CLCN2. |
| HPA | CAB009397. HPA014545. HPA024108. |
| MIM | 600570. gene. 607628. phenotype. |
| neXtProt | NX_P51788. |
| Orphanet | 307. Juvenile myoclonic epilepsy. |
| PharmGKB | PA26547. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | COG0038. |
| HOGENOM | HOG000231297. |
| HOVERGEN | HBG005332. |
| InParanoid | P51788. |
| KO | K05011. |
| OMA | ETHKPLK. |
| OrthoDB | EOG4G7BXQ. |
| PhylomeDB | P51788. |
Gene expression databases | |
| ArrayExpress | P51788. |
| Bgee | P51788. |
| CleanEx | HS_CLCN2. |
| Genevestigator | P51788. |
| GermOnline | ENSG00000114859. Homo sapiens. |
Family and domain databases | |
| Gene3D | 1.10.3080.10. 1 hit. |
| InterPro | IPR002244. Cl-channel-2. IPR014743. Cl-channel_core. IPR001807. Cl-channel_volt-gated. IPR000644. Cysta_beta_synth_core. [Graphical view] |
| Pfam | PF00571. CBS. 1 hit. PF00654. Voltage_CLC. 1 hit. [Graphical view] |
| PRINTS | PR00762. CLCHANNEL. PR01113. CLCHANNEL2. |
| SMART | SM00116. CBS. 1 hit. [Graphical view] |
| SUPFAM | SSF81340. Cl-channel_core. 1 hit. |
| PROSITE | PS51371. CBS. 2 hits. [Graphical view] |
| ProtoNet | Search... |
Other | |
| ChEMBL | CHEMBL1628478. |
| ChiTaRS | CLCN2. human. |
| DrugBank | DB01046. Lubiprostone. |
| GenomeRNAi | 1181. |
| NextBio | 4880. |
| SOURCE | Search... |
Entry information
| Entry name | CLCN2_HUMAN | ||||||||
| Accession | Primary (citable) accession number: P51788 Secondary accession number(s): B4DQT9 Q8WU13 | ||||||||
| Entry history |
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| 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 3 Human chromosome 3: 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
