View source for 3oon


==The structure of an outer membrance protein from Borrelia burgdorferi B31==
<StructureSection load='3oon' size='340' side='right'caption='[[3oon]], [[Resolution|resolution]] 1.79&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3oon]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Borreliella_burgdorferi_B31 Borreliella burgdorferi B31]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OON OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OON FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.79&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=3oon FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3oon OCA], [https://pdbe.org/3oon PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3oon RCSB], [https://www.ebi.ac.uk/pdbsum/3oon PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3oon ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/O51189_BORBU O51189_BORBU] 
== 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/oo/3oon_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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/main_output.php?pdb_ID=3oon ConSurf].
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== Publication Abstract from PubMed ==
Salmonella enterica serovar Typhimurium can induce both humoral and cell-mediated responses when establishing itself in the host. These responses are primarily stimulated against the lipopolysaccharide and major outer membrane (OM) proteins. OmpA is one of these major OM proteins. It comprises a N-terminal eight-stranded beta-barrel transmembrane domain and a C-terminal domain (OmpA(CTD) ). The OmpA(CTD) and its homologs are believed to bind to peptidoglycan (PG) within the periplasm, maintaining bacterial osmotic homeostasis and modulating the permeability and integrity of the OM. Here we present the first crystal structures of the OmpA(CTD) from two pathogens: S. typhimurium (STOmpA(CTD) ) in open and closed forms and causative agent of Lyme Disease Borrelia burgdorferi (BbOmpA(CTD) ), in closed form. In the open form of STOmpA(CTD) , an aspartate residue from a long beta2-alpha3 loop points into the binding pocket, suggesting that an anion group such as a carboxylate group from PG is favored at the binding site. In the closed form of STOmpA(CTD) and in the structure of BbOmpA(CTD) , a sulfate group from the crystallization buffer is tightly bound at the binding site. The differences between the closed and open forms of STOmpA(CTD) , suggest a large conformational change that includes an extension of alpha3 helix by ordering a part of beta2-alpha3 loop. We propose that the sulfate anion observed in these structures mimics the carboxylate group of PG when bound to STOmpA(CTD) suggesting PG-anchoring mechanism. In addition, the binding of PG or a ligand mimic may enhance dimerization of STOmpA(CTD) , or possibly that of full length STOmpA.

Insights into PG-binding, conformational change, and dimerization of the OmpA C-terminal domains from Salmonella enterica serovar Typhimurium and Borrelia burgdorferi.,Tan K, Deatherage Kaiser BL, Wu R, Cuff M, Fan Y, Bigelow L, Jedrzejczak RP, Adkins JN, Cort JR, Babnigg G, Joachimiak A Protein Sci. 2017 Sep;26(9):1738-1748. doi: 10.1002/pro.3209. Epub 2017 Jun 19. PMID:28580643<ref>PMID:28580643</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Borreliella burgdorferi B31]]
[[Category: Large Structures]]
[[Category: Bigelow L]]
[[Category: Fan Y]]
[[Category: Feldman B]]
[[Category: Joachimiak A]]