1ujw
From Proteopedia
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| - | [[ | + | ==Structure of the complex between BtuB and Colicin E3 Receptor binding domain== |
| + | <StructureSection load='1ujw' size='340' side='right' caption='[[1ujw]], [[Resolution|resolution]] 2.75Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[1ujw]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UJW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UJW FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AAE:ACETOACETIC+ACID'>AAE</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=GP1:GLUCOSAMINE+1-PHOSPHATE'>GP1</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=LIM:3-OXO-PENTADECANOIC+ACID'>LIM</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1nqe|1nqe]], [[1jch|1jch]]</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=1ujw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ujw OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ujw RCSB], [http://www.ebi.ac.uk/pdbsum/1ujw PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/BTUB_ECOLI BTUB_ECOLI]] Involved in the active translocation of vitamin B12 (cyanocobalamin) across the outer membrane to the periplasmic space. It derives its energy for transport by interacting with the trans-periplasmic membrane protein TonB. Is also a receptor for bacteriophages BF23 and C1, and for A and E colicins.[HAMAP-Rule:MF_01531] [[http://www.uniprot.org/uniprot/CEA3_ECOLI CEA3_ECOLI]] Inactivates ribosomes by hydrolyzing 16S RNA in 30S ribosomes at a specific site. Colicins are polypeptide toxins produced by and active against E.coli and closely related bacteria. | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/uj/1ujw_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </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/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Cellular import of colicin E3 is initiated by the Escherichia coli outer membrane cobalamin transporter, BtuB. The 135-residue 100-A coiled-coil receptor-binding domain (R135) of colicin E3 forms a 1:1 complex with BtuB whose structure at a resolution of 2.75 A is reported. Binding of R135 to the BtuB extracellular surface (DeltaG(o) = -12 kcal mol(-1)) is mediated by 27 residues of R135 near the coiled-coil apex. Formation of the R135-BtuB complex results in unfolding of R135 N- and C-terminal ends, inferred to be important for unfolding of the colicin T-domain. Small conformational changes occur in the BtuB cork and barrel domains but are insufficient to form a translocation channel. The absence of a channel and the peripheral binding of R135 imply that BtuB serves to bind the colicin, and that the coiled-coil delivers the colicin to a neighboring outer membrane protein for translocation, thus forming a colicin translocon. The translocator was concluded to be OmpF from the occlusion of OmpF channels by colicin E3. | ||
| - | + | The structure of BtuB with bound colicin E3 R-domain implies a translocon.,Kurisu G, Zakharov SD, Zhalnina MV, Bano S, Eroukova VY, Rokitskaya TI, Antonenko YN, Wiener MC, Cramer WA Nat Struct Biol. 2003 Nov;10(11):948-54. Epub 2003 Oct 5. PMID:14528295<ref>PMID:14528295</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
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==See Also== | ==See Also== | ||
*[[BtuB|BtuB]] | *[[BtuB|BtuB]] | ||
*[[Colicin|Colicin]] | *[[Colicin|Colicin]] | ||
| - | + | == References == | |
| - | == | + | <references/> |
| - | < | + | __TOC__ |
| + | </StructureSection> | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
| - | [[Category: Antonenko, Y N | + | [[Category: Antonenko, Y N]] |
| - | [[Category: Bano, S | + | [[Category: Bano, S]] |
| - | [[Category: Cramer, W A | + | [[Category: Cramer, W A]] |
| - | [[Category: Eroukova, V Y | + | [[Category: Eroukova, V Y]] |
| - | [[Category: Kurisu, G | + | [[Category: Kurisu, G]] |
| - | [[Category: Rokitskaya, T I | + | [[Category: Rokitskaya, T I]] |
| - | [[Category: Wiener, M C | + | [[Category: Wiener, M C]] |
| - | [[Category: Zakharov, S D | + | [[Category: Zakharov, S D]] |
| - | [[Category: Zhalnina, M V | + | [[Category: Zhalnina, M V]] |
[[Category: Beta-barrel]] | [[Category: Beta-barrel]] | ||
[[Category: Coiled-coil]] | [[Category: Coiled-coil]] | ||
[[Category: Transport protein-hydrolase complex]] | [[Category: Transport protein-hydrolase complex]] | ||
Revision as of 07:46, 25 December 2014
Structure of the complex between BtuB and Colicin E3 Receptor binding domain
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