View source for 5u1a


==Ferritin with Gc MtrE loop 1 inserted at His34==
<StructureSection load='5u1a' size='340' side='right'caption='[[5u1a]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5u1a]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Helicobacter_pylori Helicobacter pylori] and [https://en.wikipedia.org/wiki/Neisseria_gonorrhoeae Neisseria gonorrhoeae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U1A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5U1A 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]] 2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=5u1a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u1a OCA], [https://pdbe.org/5u1a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5u1a RCSB], [https://www.ebi.ac.uk/pdbsum/5u1a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5u1a ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q51006_NEIGO Q51006_NEIGO] [https://www.uniprot.org/uniprot/FTN_HELPY FTN_HELPY] Iron-storage protein.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Effective vaccines are urgently needed to combat gonorrhea, a common sexually transmitted bacterial infection, for which treatment options are diminishing due to rapid emergence of antibiotic resistance. We have used a rational approach to the development of gonorrhea vaccines, and genetically engineered nanoparticles to present antigenic peptides of Neisseria gonorrhoeae, the causative agent of gonorrhea. We hypothesized that the ferritin nanocage could be used as a platform to display an ordered array of N. gonorrhoeae antigenic peptides on its surface. MtrE, the outer membrane channel of the highly conserved gonococcal MtrCDE active efflux pump, is an attractive vaccine target due to its importance in protecting N. gonorrhoeae from host innate effectors and antibiotic resistance. Using computational approaches, we designed constructs that expressed chimeric proteins of the Helicobacter pylori ferritin and antigenic peptides that correspond to the two surface-exposed loops of N. gonorrhoeae MtrE. The peptides were inserted at the N terminus or in a surface-exposed ferritin loop between helices alphaA and alphaB. Crystal structures of the chimeric proteins revealed that the proteins assembled correctly into a 24-mer nanocage structure. Although the inserted N. gonorrhoeae peptides were disordered, it was clear that they were displayed on the nanocage surface, but with multiple conformations. Our results confirmed that the ferritin nanoparticle is a robust platform to present antigenic peptides and therefore an ideal system for rational design of immunogens.

Structure-based design of ferritin nanoparticle immunogens displaying antigenic loops of Neisseria gonorrhoeae.,Wang L, Xing D, Le Van A, Jerse AE, Wang S FEBS Open Bio. 2017 Jul 24;7(8):1196-1207. doi: 10.1002/2211-5463.12267., eCollection 2017 Aug. PMID:28781959<ref>PMID:28781959</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5u1a" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Helicobacter pylori]]
[[Category: Large Structures]]
[[Category: Neisseria gonorrhoeae]]
[[Category: Wang S]]