2j58
From Proteopedia
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| - | == | + | |
| - | <StructureSection load='2j58' size='340' side='right' caption='[[2j58]], [[Resolution|resolution]] 2.25Å' scene=''> | + | ==The structure of Wza== |
| + | <StructureSection load='2j58' size='340' side='right'caption='[[2j58]], [[Resolution|resolution]] 2.25Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | [[2j58]] is a 8 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[2j58]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2J58 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2J58 FirstGlance]. <br> |
| - | <b>[[ | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25Å</td></tr> |
| - | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEX:HEXANE'>HEX</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=SC2:N-ACETYL-L-CYSTEINE'>SC2</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=2j58 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2j58 OCA], [https://pdbe.org/2j58 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2j58 RCSB], [https://www.ebi.ac.uk/pdbsum/2j58 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2j58 ProSAT]</span></td></tr> |
| - | <b>Resources:</b> <span class='plainlinks'>[ | + | </table> |
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/Q9X4B7_ECOLX Q9X4B7_ECOLX] | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
| - | [[Image:Consurf_key_small.gif|right]] | + | [[Image:Consurf_key_small.gif|200px|right]] |
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j5/2j58_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j5/2j58_consurf.spt"</scriptWhenChecked> |
| - | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> |
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
| - | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2j58 ConSurf]. |
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Many types of bacteria produce extracellular polysaccharides (EPSs). Some are secreted polymers and show only limited association with the cell surface, whereas others are firmly attached to the cell surface and form a discrete structural layer, the capsule, which envelopes the cell and allows the bacteria to evade or counteract the host immune system. EPSs have critical roles in bacterial colonization of surfaces, such as epithelia and medical implants; in addition some EPSs have important industrial and biomedical applications in their own right. Here we describe the 2.26 A resolution structure of the 340 kDa octamer of Wza, an integral outer membrane lipoprotein, which is essential for group 1 capsule export in Escherichia coli. The transmembrane region is a novel alpha-helical barrel. The bulk of the Wza structure is located in the periplasm and comprises three novel domains forming a large central cavity. Wza is open to the extracellular environment but closed to the periplasm. We propose a route and mechanism for translocation of the capsular polysaccharide. This work may provide insight into the export of other large polar molecules such as DNA and proteins. | Many types of bacteria produce extracellular polysaccharides (EPSs). Some are secreted polymers and show only limited association with the cell surface, whereas others are firmly attached to the cell surface and form a discrete structural layer, the capsule, which envelopes the cell and allows the bacteria to evade or counteract the host immune system. EPSs have critical roles in bacterial colonization of surfaces, such as epithelia and medical implants; in addition some EPSs have important industrial and biomedical applications in their own right. Here we describe the 2.26 A resolution structure of the 340 kDa octamer of Wza, an integral outer membrane lipoprotein, which is essential for group 1 capsule export in Escherichia coli. The transmembrane region is a novel alpha-helical barrel. The bulk of the Wza structure is located in the periplasm and comprises three novel domains forming a large central cavity. Wza is open to the extracellular environment but closed to the periplasm. We propose a route and mechanism for translocation of the capsular polysaccharide. This work may provide insight into the export of other large polar molecules such as DNA and proteins. | ||
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Wza the translocon for E. coli capsular polysaccharides defines a new class of membrane protein.,Dong C, Beis K, Nesper J, Brunkan-Lamontagne AL, Clarke BR, Whitfield C, Naismith JH Nature. 2006 Nov 9;444(7116):226-9. Epub 2006 Nov 1. PMID:17086202<ref>PMID:17086202</ref> | Wza the translocon for E. coli capsular polysaccharides defines a new class of membrane protein.,Dong C, Beis K, Nesper J, Brunkan-Lamontagne AL, Clarke BR, Whitfield C, Naismith JH Nature. 2006 Nov 9;444(7116):226-9. Epub 2006 Nov 1. PMID:17086202<ref>PMID:17086202</ref> | ||
| - | From | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| + | </div> | ||
| + | <div class="pdbe-citations 2j58" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Dong C]] |
| - | [[Category: | + | [[Category: Naismith JH]] |
Current revision
The structure of Wza
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