5u1a | pdb_00005u1a

Ferritin with Gc MtrE loop 1 inserted at His34

spinqualitylabelsall models 5u1a, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5u1a is a 12 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, FE, GOL, NA Related: 5u1b Activity: Bacterial non-heme ferritin, with EC number 1.16.3.2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [A0A0B2EHC8_HELPX] Iron-storage protein.[RuleBase:RU361145] 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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