Article · Wikipedia archive · Last revised Jul 4, 2026

CLCN2

Chloride channel protein 2 is a protein that in humans is encoded by the CLCN2 gene. Mutations of this gene have been found to cause leukoencephalopathy and Idiopathic generalised epilepsy, although the latter claim has been disputed.

Last revised
Jul 4, 2026
Read time
≈ 5 min
Length
1,191 w
Citations
15
Source
CLCN2
Identifiers
AliasesCLCN2, CIC-2, CLC2, ECA2, ECA3, EGI11, EGI3, EGMA, EJM6, EJM8, LKPAT, clC-2, chloride voltage-gated channel 2, HALD2
External IDsOMIM: 600570; MGI: 105061; HomoloGene: 3213; GeneCards: CLCN2; OMA:CLCN2 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001171087
NM_001171088
NM_001171089
NM_004366

NM_009900

RefSeq (protein)

NP_001164558
NP_001164559
NP_001164560
NP_004357

NP_034030

Location (UCSC)Chr 3: 184.35 – 184.36 MbChr 16: 20.52 – 20.54 Mb
PubMed search34
Wikidata
View/Edit HumanView/Edit Mouse

Chloride channel protein 2 is a protein that in humans is encoded by the CLCN2 gene.56 Mutations of this gene have been found to cause leukoencephalopathy7 and Idiopathic generalised epilepsy (OMIM: 600699),8 although the latter claim has been disputed.9

A gain of function mutation in the CLCN2 gene was found to cause primary aldosteronism,10 a form of arterial hypertension due to excessive production of aldosterone by the neuroendocrine cells of the zona glomerulosa of the adrenal gland. The mutation was found to cause a chloride leak in these cells and increased the expression of aldosterone synthase.11

CLCN2 contains a transmembrane region that is involved in chloride ion transport as well two intracellular copies of the CBS domain.

See also

See also

References

References

  1. GRCh38: Ensembl release 89: ENSG00000114859Ensembl, May 2017
  2. GRCm38: Ensembl release 89: ENSMUSG00000022843Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Cid LP, Montrose-Rafizadeh C, Smith DI, Guggino WB, Cutting GR (March 1995). "Cloning of a putative human voltage-gated chloride channel (CIC-2) cDNA widely expressed in human tissues". Human Molecular Genetics. 4 (3): 407–413. doi:10.1093/hmg/4.3.407. PMID 7795595.
  6. "Entrez Gene: CLCN2 chloride channel 2".
  7. Depienne C, Bugiani M, Dupuits C, Galanaud D, Touitou V, Postma N, et al. (July 2013). "Brain white matter oedema due to ClC-2 chloride channel deficiency: an observational analytical study". The Lancet. Neurology. 12 (7): 659–668. doi:10.1016/S1474-4422(13)70053-X. hdl:11858/00-001M-0000-0018-F3BD-9. PMID 23707145. S2CID 16634353.
  8. Combi R, Grioni D, Contri M, Redaelli S, Redaelli F, Bassi MT, et al. (April 2009). "Clinical and genetic familial study of a large cohort of Italian children with idiopathic epilepsy". Brain Research Bulletin. 79 (2): 89–96. doi:10.1016/j.brainresbull.2009.01.008. PMID 19200853. S2CID 3036929.
  9. Niemeyer MI, Cid LP, Sepúlveda FV, Blanz J, Auberson M, Jentsch TJ (January 2010). "No evidence for a role of CLCN2 variants in idiopathic generalized epilepsy". Nature Genetics. 42 (1): 3. doi:10.1038/ng0110-3. PMID 20037607.
  10. Fernandes-Rosa FL, Daniil G, Orozco IJ, Goppner C, Zein R, Jain V, et al. (March 2018). "A gain-of-function mutation in the CLCN2 chloride channel gene causes primary aldosteronism". Nature Genetics. 50 (3): 355–361. doi:10.1038/s41588-018-0053-8. ISSN 1546-1718. PMID 29403012.
  11. Stowasser M, Wolley M, Wu A, Gordon RD, Schewe J, Stolting G, et al. (April 2019). "Pathogenesis of Familial Hyperaldosteronism Type II: New Concepts Involving Anion Channels". Current Hypertension Reports. 21 (4): 31. doi:10.1007/s11906-019-0934-y. ISSN 1522-6417. PMID 30949771.
Further reading

Further reading

External links

This article incorporates text from the United States National Library of Medicine, which is in the public domain.