4dx2

Structural highlights

Disease

TRPV4_HUMAN Spondylometaphyseal dysplasia, Kozlowski type;Familial digital arthropathy-brachydactyly;Autosomal dominant brachyolmia;Autosomal dominant congenital benign spinal muscular atrophy;Parastremmatic dwarfism;Spondyloepiphyseal dysplasia, Maroteaux type;Autosomal dominant Charcot-Marie-Tooth disease type 2C;Metatropic dysplasia. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry.

Function

TRPV4_HUMAN Non-selective calcium permeant cation channel probably involved in osmotic sensitivity and mechanosensitivity. Activation by exposure to hypotonicity within the physiological range exhibits an outward rectification. Also activated by low pH, citrate and phorbol esters. Increase of intracellular Ca(2+) potentiates currents. Channel activity seems to be regulated by a calmodulin-dependent mechanism with a negative feedback mechanism. Promotes cell-cell junction formation in skin keratinocytes and plays an important role in the formation and/or maintenance of functional intercellular barriers. Acts as a regulator of intracellular Ca(2+) in synoviocytes. Plays an obligatory role as a molecular component in the nonselective cation channel activation induced by 4-alpha-phorbol 12,13-didecanoate and hypotonic stimulation in synoviocytes and also regulates production of IL-8.^{[1] [2] [3]}

See Also

• Ion channels 3D structures

References

1. ↑ Strotmann R, Harteneck C, Nunnenmacher K, Schultz G, Plant TD. OTRPC4, a nonselective cation channel that confers sensitivity to extracellular osmolarity. Nat Cell Biol. 2000 Oct;2(10):695-702. PMID:11025659 doi:http://dx.doi.org/10.1038/35036318
2. ↑ Strotmann R, Schultz G, Plant TD. Ca2+-dependent potentiation of the nonselective cation channel TRPV4 is mediated by a C-terminal calmodulin binding site. J Biol Chem. 2003 Jul 18;278(29):26541-9. Epub 2003 Apr 30. PMID:12724311 doi:http://dx.doi.org/10.1074/jbc.M302590200
3. ↑ Itoh Y, Hatano N, Hayashi H, Onozaki K, Miyazawa K, Muraki K. An environmental sensor, TRPV4 is a novel regulator of intracellular Ca2+ in human synoviocytes. Am J Physiol Cell Physiol. 2009 Nov;297(5):C1082-90. doi:, 10.1152/ajpcell.00204.2009. Epub 2009 Sep 16. PMID:19759329 doi:http://dx.doi.org/10.1152/ajpcell.00204.2009