1ho7: Difference between revisions
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==NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN TFE== | ==NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN TFE== | ||
<StructureSection load='1ho7' size='340' side='right' caption='[[1ho7]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''> | <StructureSection load='1ho7' size='340' side='right' caption='[[1ho7]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''> | ||
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<table><tr><td colspan='2'>[[1ho7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HO7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HO7 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1ho7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HO7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HO7 FirstGlance]. <br> | ||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ho2|1ho2]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ho2|1ho2]]</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ho7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ho7 OCA], [http://pdbe.org/1ho7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ho7 RCSB], [http://www.ebi.ac.uk/pdbsum/1ho7 PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ho7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ho7 OCA], [http://pdbe.org/1ho7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ho7 RCSB], [http://www.ebi.ac.uk/pdbsum/1ho7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ho7 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
Revision as of 13:37, 27 September 2017
NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN TFENMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN TFE
Structural highlights
Function[KCNAS_DROME] Voltage-dependent potassium channel involved in regulation of sleep need or efficiency. Mediates the voltage-dependent potassium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a potassium-selective channel through which potassium ions may pass in accordance with their electrochemical gradient.[1] Publication Abstract from PubMedThe propagation of action potentials during neuronal signal transduction in phospholipid membranes is mediated by ion channels, a diverse group of membrane proteins. The S4-S5 linker peptide (S4-S5), that connects the S4 and S5 transmembrane segments of voltage-gated potassium channels is an important region of the Shaker ion-channel protein. Despite its importance, very little is known about its structure. Here we provide evidence for an amphipathic alpha-helical conformation of a synthetic S4-S5 peptide of the voltage-gated Drosophila melanogaster Shaker potassium channel in water/trifluoroethanol and in aqueous phospholipid micelles. The three-dimensional solution structures of the S4-S5 peptide were obtained by high-resolution nuclear magnetic resonance spectroscopy and distance-geometry/simulated-annealing calculations. The detailed structural features are discussed with respect to model studies and available mutagenesis data on the mechanism and selectivity of the potassium channel. Three-dimensional structure of the S4-S5 segment of the Shaker potassium channel.,Ohlenschlager O, Hojo H, Ramachandran R, Gorlach M, Haris PI Biophys J. 2002 Jun;82(6):2995-3002. PMID:12023222[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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