| Structural highlights
5vkn is a 2 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | 16C, CD, K, Q6F, R16 |
| Related: | 5vk5, 5vkp |
| Gene: | Kcnk2 (LK3 transgenic mice) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[KCNK2_MOUSE] Ion channel that contributes to passive transmembrane potassium transport. Reversibly converts between a voltage-insensitive potassium leak channel and a voltage-dependent outward rectifying potassium channel in a phosphorylation-dependent manner. In astrocytes, forms mostly heterodimeric potassium channels with KCNK1, with only a minor proportion of functional channels containing homodimeric KCNK2 (PubMed:24496152). In astrocytes, the heterodimer formed by KCNK1 and KCNK2 is required for rapid glutamate release in response to activation of G-protein coupled receptors, such as F2R and CNR1 (PubMed:24496152).[1] [2] [3] [4]
References
- ↑ Patel AJ, Honore E, Lesage F, Fink M, Romey G, Lazdunski M. Inhalational anesthetics activate two-pore-domain background K+ channels. Nat Neurosci. 1999 May;2(5):422-6. PMID:10321245 doi:https://dx.doi.org/10.1038/8084
- ↑ Honore E, Patel AJ, Chemin J, Suchyna T, Sachs F. Desensitization of mechano-gated K2P channels. Proc Natl Acad Sci U S A. 2006 May 2;103(18):6859-64. Epub 2006 Apr 24. PMID:16636285 doi:https://dx.doi.org/10.1073/pnas.0600463103
- ↑ Hwang EM, Kim E, Yarishkin O, Woo DH, Han KS, Park N, Bae Y, Woo J, Kim D, Park M, Lee CJ, Park JY. A disulphide-linked heterodimer of TWIK-1 and TREK-1 mediates passive conductance in astrocytes. Nat Commun. 2014;5:3227. doi: 10.1038/ncomms4227. PMID:24496152 doi:https://dx.doi.org/10.1038/ncomms4227
- ↑ Fink M, Duprat F, Lesage F, Reyes R, Romey G, Heurteaux C, Lazdunski M. Cloning, functional expression and brain localization of a novel unconventional outward rectifier K+ channel. EMBO J. 1996 Dec 16;15(24):6854-62. PMID:9003761
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