View source for 6ody


==Cryo-EM structure of Helicobacter pylori VacA hexamer==
<SX load='6ody' size='340' side='right' viewer='molstar' caption='[[6ody]], [[Resolution|resolution]] 3.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6ody]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Helicobacter_pylori Helicobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ODY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6ODY FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.8&#8491;</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=6ody FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ody OCA], [https://pdbe.org/6ody PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ody RCSB], [https://www.ebi.ac.uk/pdbsum/6ody PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ody ProSAT]</span></td></tr>
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== Publication Abstract from PubMed ==
Helicobacter pylori colonizes the human stomach and contributes to the development of gastric cancer and peptic ulcer disease. H. pylori secretes a pore-forming toxin called vacuolating cytotoxin A (VacA), which contains two domains (p33 and p55) and assembles into oligomeric structures. Using single-particle cryo-electron microscopy, we have determined low-resolution structures of a VacA dodecamer and heptamer, as well as a 3.8-A structure of the VacA hexamer. These analyses show that VacA p88 consists predominantly of a right-handed beta-helix that extends from the p55 domain into the p33 domain. We map the regions of p33 and p55 involved in hexamer assembly, model how interactions between protomers support heptamer formation, and identify surfaces of VacA that likely contact membrane. This work provides structural insights into the process of VacA oligomerization and identifies regions of VacA protomers that are predicted to contact the host cell surface during channel formation.

Cryo-EM Analysis Reveals Structural Basis of Helicobacter pylori VacA Toxin Oligomerization.,Su M, Erwin AL, Campbell AM, Pyburn TM, Salay LE, Hanks JL, Lacy DB, Akey DL, Cover TL, Ohi MD J Mol Biol. 2019 May 3;431(10):1956-1965. doi: 10.1016/j.jmb.2019.03.029. Epub, 2019 Apr 5. PMID:30954575<ref>PMID:30954575</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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[[Category: Helicobacter pylori]]
[[Category: Large Structures]]
[[Category: Cover TL]]
[[Category: Erwin AL]]
[[Category: Ohi MD]]