4uuj
From Proteopedia
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| - | ''' | + | ==POTASSIUM CHANNEL KCSA-FAB WITH TETRAHEXYLAMMONIUM== |
| + | <StructureSection load='4uuj' size='340' side='right' caption='[[4uuj]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4uuj]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UUJ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4UUJ FirstGlance]. <br> | ||
| + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene>, <scene name='pdbligand=DGA:DIACYL+GLYCEROL'>DGA</scene>, <scene name='pdbligand=F09:NONAN-1-OL'>F09</scene>, <scene name='pdbligand=IND:INDOLE'>IND</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=XA7:TETRAHEXYL+AMMONNIUM'>XA7</scene><br> | ||
| + | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4uuj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4uuj OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4uuj RCSB], [http://www.ebi.ac.uk/pdbsum/4uuj PDBsum]</span></td></tr> | ||
| + | <table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Potassium channels allow for the passive movement of potassium ions across the cell membrane and are instrumental in controlling the membrane potential in all cell types. Quaternary ammonium (QA) compounds block potassium channels and have long been used to study the functional and structural properties of these channels. Here we describe the interaction between three symmetrical hydrophobic QAs and the prokaryotic potassium channel KcsA. The structures demonstrate the presence of a hydrophobic pocket between the inner helices of KcsA and provide insight into the binding site and blocking mechanism of hydrophobic QAs. The structures also reveal a structurally hidden pathway between the central cavity and the outside membrane environment reminiscent of the lateral fenestration observed in sodium channels that can be accessed through small conformational changes in the pore wall. We propose that the hydrophobic binding pocket stabilizes the alkyl chains of long-chain QA molecules and may play a key role in hydrophobic drug binding in general. | ||
| - | + | Structures of KcsA in Complex with Symmetrical Quaternary Ammonium Compounds Reveal a Hydrophobic Binding Site.,Lenaeus MJ, Burdette D, Wagner T, Focia PJ, Gross A Biochemistry. 2014 Aug 19;53(32):5365-73. doi: 10.1021/bi500525s. Epub 2014 Aug, 8. PMID:25093676<ref>PMID:25093676</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Burdette, D.]] | ||
| + | [[Category: Focia, P J.]] | ||
| + | [[Category: Gross, A.]] | ||
| + | [[Category: Lenaeus, M J.]] | ||
| + | [[Category: Wagner, T.]] | ||
| + | [[Category: Immune system-metal transport complex]] | ||
| + | [[Category: Ion transport]] | ||
| + | [[Category: Ionic channel]] | ||
| + | [[Category: Potassium channel]] | ||
| + | [[Category: Protein-antibody fab complex]] | ||
| + | [[Category: Quaternary ammonium]] | ||
Revision as of 08:42, 27 August 2014
POTASSIUM CHANNEL KCSA-FAB WITH TETRAHEXYLAMMONIUM
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