CLDN2

Protein-coding gene in humans From Wikipedia, the free encyclopedia

Claudin-2 is a protein that in humans is encoded by the CLDN2 gene.[5][6] It belongs to the group of claudins.

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CLDN2
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesCLDN2, claudin 2, OAZON
External IDsOMIM: 300520; MGI: 1276110; HomoloGene: 9621; GeneCards: CLDN2; OMA:CLDN2 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_020384
NM_001171092
NM_001171095

NM_016675

RefSeq (protein)

NP_001164563
NP_001164566
NP_065117

NP_057884

Location (UCSC)Chr X: 106.9 – 106.93 MbChr X: 138.7 – 138.71 Mb
PubMed search[3][4]
Wikidata
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Members of the claudin protein family, such as CLDN2, are expressed in an organ-specific manner and regulate the tissue-specific physiologic properties of tight junctions (Sakaguchi et al., 2002).[supplied by OMIM][6]

Function

Claudin-2 is expressed in cation-leaky epithelia such as that of the kidney proximal tubule.[7] Mice that are deficient in claudin-2 have reduced reabsorption of Na+ in the proximal tubule, consistent with a role in paracellular transport. Similar results have been obtained with cultured cells, as overexpression in claudin-2 lacking cells leads to increase of permeability for small cations.[8] Furthermore, claudin-2 has been shown to form paracellular channels for water.[9]

References

Further reading

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