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| - | [[Image:2ovc.png|left|200px]] | |
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| - | <!--
| + | ==Crystal structure of a coiled-coil tetramerization domain from Kv7.4 channels== |
| - | The line below this paragraph, containing "STRUCTURE_2ovc", creates the "Structure Box" on the page.
| + | <StructureSection load='2ovc' size='340' side='right'caption='[[2ovc]], [[Resolution|resolution]] 2.07Å' scene=''> |
| - | You may change the PDB parameter (which sets the PDB file loaded into the applet)
| + | == Structural highlights == |
| - | or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
| + | <table><tr><td colspan='2'>[[2ovc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OVC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OVC FirstGlance]. <br> |
| - | or leave the SCENE parameter empty for the default display.
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.07Å</td></tr> |
| - | -->
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ovc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ovc OCA], [https://pdbe.org/2ovc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ovc RCSB], [https://www.ebi.ac.uk/pdbsum/2ovc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ovc ProSAT]</span></td></tr> |
| - | {{STRUCTURE_2ovc| PDB=2ovc | SCENE= }}
| + | </table> |
| - | | + | == Disease == |
| - | ===Crystal structure of a coiled-coil tetramerization domain from Kv7.4 channels===
| + | [https://www.uniprot.org/uniprot/KCNQ4_HUMAN KCNQ4_HUMAN] Defects in KCNQ4 are the cause of deafness autosomal dominant type 2A (DFNA2A) [MIM:[https://omim.org/entry/600101 600101]. DFNA2A is a form of sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information.<ref>PMID:10025409</ref> <ref>PMID:10369879</ref> <ref>PMID:10571947</ref> <ref>PMID:10925378</ref> <ref>PMID:21242547</ref> |
| - | | + | == Function == |
| - | | + | [https://www.uniprot.org/uniprot/KCNQ4_HUMAN KCNQ4_HUMAN] Probably important in the regulation of neuronal excitability. May underlie a potassium current involved in regulating the excitability of sensory cells of the cochlea. KCNQ4 channels are blocked by linopirdin, XE991 and bepridil, whereas clofilium is without significant effect. Muscarinic agonist oxotremorine-M strongly suppress KCNQ4 current in CHO cells in which cloned KCNQ4 channels were coexpressed with M1 muscarinic receptors.<ref>PMID:11245603</ref> |
| - | <!-- | + | |
| - | The line below this paragraph, {{ABSTRACT_PUBMED_17329207}}, adds the Publication Abstract to the page
| + | |
| - | (as it appears on PubMed at http://www.pubmed.gov), where 17329207 is the PubMed ID number.
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| - | -->
| + | |
| - | {{ABSTRACT_PUBMED_17329207}}
| + | |
| - | | + | |
| - | ==About this Structure== | + | |
| - | [[2ovc]] is a 1 chain structure of [[Ion channels]] with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OVC OCA]. | + | |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Ion channels]] | + | *[[Potassium channel 3D structures|Potassium channel 3D structures]] |
| - | | + | == References == |
| - | ==Reference== | + | <references/> |
| - | <ref group="xtra">PMID:17329207</ref><references group="xtra"/> | + | __TOC__ |
| | + | </StructureSection> |
| | [[Category: Homo sapiens]] | | [[Category: Homo sapiens]] |
| - | [[Category: Clark, K A.]] | + | [[Category: Large Structures]] |
| - | [[Category: Holton, J M.]] | + | [[Category: Clark KA]] |
| - | [[Category: Howard, R J.]] | + | [[Category: Holton JM]] |
| - | [[Category: Minor, D L.]] | + | [[Category: Howard RJ]] |
| - | [[Category: Coiled-coil]] | + | [[Category: Minor DL]] |
| - | [[Category: Ion channel assembly]]
| + | |
| - | [[Category: Potassium channel]]
| + | |
| - | [[Category: Tetramer]]
| + | |
| - | [[Category: Transport protein]]
| + | |
| - | [[Category: Voltage-gated channel]]
| + | |
| Structural highlights
Disease
KCNQ4_HUMAN Defects in KCNQ4 are the cause of deafness autosomal dominant type 2A (DFNA2A) [MIM:600101. DFNA2A is a form of sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information.[1] [2] [3] [4] [5]
Function
KCNQ4_HUMAN Probably important in the regulation of neuronal excitability. May underlie a potassium current involved in regulating the excitability of sensory cells of the cochlea. KCNQ4 channels are blocked by linopirdin, XE991 and bepridil, whereas clofilium is without significant effect. Muscarinic agonist oxotremorine-M strongly suppress KCNQ4 current in CHO cells in which cloned KCNQ4 channels were coexpressed with M1 muscarinic receptors.[6]
See Also
References
- ↑ Kubisch C, Schroeder BC, Friedrich T, Lutjohann B, El-Amraoui A, Marlin S, Petit C, Jentsch TJ. KCNQ4, a novel potassium channel expressed in sensory outer hair cells, is mutated in dominant deafness. Cell. 1999 Feb 5;96(3):437-46. PMID:10025409
- ↑ Coucke PJ, Van Hauwe P, Kelley PM, Kunst H, Schatteman I, Van Velzen D, Meyers J, Ensink RJ, Verstreken M, Declau F, Marres H, Kastury K, Bhasin S, McGuirt WT, Smith RJ, Cremers CW, Van de Heyning P, Willems PJ, Smith SD, Van Camp G. Mutations in the KCNQ4 gene are responsible for autosomal dominant deafness in four DFNA2 families. Hum Mol Genet. 1999 Jul;8(7):1321-8. PMID:10369879
- ↑ Talebizadeh Z, Kelley PM, Askew JW, Beisel KW, Smith SD. Novel mutation in the KCNQ4 gene in a large kindred with dominant progressive hearing loss. Hum Mutat. 1999;14(6):493-501. PMID:10571947 doi:<493::AID-HUMU8>3.0.CO;2-P 10.1002/(SICI)1098-1004(199912)14:6<493::AID-HUMU8>3.0.CO;2-P
- ↑ Van Hauwe P, Coucke PJ, Ensink RJ, Huygen P, Cremers CW, Van Camp G. Mutations in the KCNQ4 K+ channel gene, responsible for autosomal dominant hearing loss, cluster in the channel pore region. Am J Med Genet. 2000 Jul 31;93(3):184-7. PMID:10925378
- ↑ Arnett J, Emery SB, Kim TB, Boerst AK, Lee K, Leal SM, Lesperance MM. Autosomal dominant progressive sensorineural hearing loss due to a novel mutation in the KCNQ4 gene. Arch Otolaryngol Head Neck Surg. 2011 Jan;137(1):54-9. doi:, 10.1001/archoto.2010.234. PMID:21242547 doi:10.1001/archoto.2010.234
- ↑ Sogaard R, Ljungstrom T, Pedersen KA, Olesen SP, Jensen BS. KCNQ4 channels expressed in mammalian cells: functional characteristics and pharmacology. Am J Physiol Cell Physiol. 2001 Apr;280(4):C859-66. PMID:11245603
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