2b6o: Difference between revisions
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==Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) at 1.9A resolution, in a closed pore state== | |||
<StructureSection load='2b6o' size='340' side='right' caption='[[2b6o]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='2b6o' size='340' side='right' caption='[[2b6o]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MC3:1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE'>MC3</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MC3:1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE'>MC3</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1sor|1sor]], [[2b6p|2b6p]], [[1ymg|1ymg]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1sor|1sor]], [[2b6p|2b6p]], [[1ymg|1ymg]]</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=2b6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2b6o OCA], [http://pdbe.org/2b6o PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2b6o RCSB], [http://www.ebi.ac.uk/pdbsum/2b6o 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=2b6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2b6o OCA], [http://pdbe.org/2b6o PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2b6o RCSB], [http://www.ebi.ac.uk/pdbsum/2b6o PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2b6o ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b6/2b6o_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b6/2b6o_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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[[Category: Aquaporin-0 junction]] | [[Category: Aquaporin-0 junction]] | ||
[[Category: Closed water pore]] | [[Category: Closed water pore]] | ||
[[Category: Lens mip]] | [[Category: Lens mip]] | ||
[[Category: Lipid bilayer]] | [[Category: Lipid bilayer]] | ||
Revision as of 09:46, 16 May 2018
Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) at 1.9A resolution, in a closed pore stateElectron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) at 1.9A resolution, in a closed pore state
Structural highlights
Function[MIP_SHEEP] Water channel. May be responsible for regulating the osmolarity of the lens. Interactions between homotetramers from adjoining membranes may stabilize cell junctions in the eye lens core.[1] [2] [3] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedLens-specific aquaporin-0 (AQP0) functions as a specific water pore and forms the thin junctions between fibre cells. Here we describe a 1.9 A resolution structure of junctional AQP0, determined by electron crystallography of double-layered two-dimensional crystals. Comparison of junctional and non-junctional AQP0 structures shows that junction formation depends on a conformational switch in an extracellular loop, which may result from cleavage of the cytoplasmic amino and carboxy termini. In the centre of the water pathway, the closed pore in junctional AQP0 retains only three water molecules, which are too widely spaced to form hydrogen bonds with each other. Packing interactions between AQP0 tetramers in the crystalline array are mediated by lipid molecules, which assume preferred conformations. We were therefore able to build an atomic model for the lipid bilayer surrounding the AQP0 tetramers, and we describe lipid-protein interactions. Lipid-protein interactions in double-layered two-dimensional AQP0 crystals.,Gonen T, Cheng Y, Sliz P, Hiroaki Y, Fujiyoshi Y, Harrison SC, Walz T Nature. 2005 Dec 1;438(7068):633-8. PMID:16319884[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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