9AVF image
Deposition Date 2024-03-01
Release Date 2024-12-11
Last Version Date 2025-02-12
Entry Detail
PDB ID:
9AVF
Keywords:
Title:
CCHFV GP38-GnH-DS heterodimer
Biological Source:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.50 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:GP38
Gene (Uniprot):GP
Mutations:Q496C
Chain IDs:A, C
Chain Length:269
Number of Molecules:2
Biological Source:Crimean-Congo hemorrhagic fever virus strain IbAr10200
Polymer Type:polypeptide(L)
Molecule:Glycoprotein N
Gene (Uniprot):GP
Mutations:V562C
Chain IDs:B, D
Chain Length:60
Number of Molecules:2
Biological Source:Crimean-Congo hemorrhagic fever virus strain IbAr10200
Primary Citation
Engineering and structures of Crimean-Congo hemorrhagic fever virus glycoprotein complexes.
Cell 188 303 ? (2025)
PMID: 39701101 DOI: 10.1016/j.cell.2024.11.008

Abstact

Crimean-Congo hemorrhagic fever virus (CCHFV) is a tickborne virus that can cause severe disease in humans with case fatality rates of 10%-40%. Although structures of CCHFV glycoproteins GP38 and Gc have provided insights into viral entry and defined epitopes of neutralizing and protective antibodies, the structure of glycoprotein Gn and its interactions with GP38 and Gc have remained elusive. Here, we use structure-guided protein engineering to produce a stabilized GP38-Gn-Gc heterotrimeric glycoprotein complex (GP38-GnH-DS-Gc). A cryo-electron microscopy (cryo-EM) structure of this complex provides the molecular basis for GP38's association on the viral surface, reveals the structure of Gn, and demonstrates that GP38-Gn restrains the Gc fusion loops in the prefusion conformation, facilitated by an N-linked glycan attached to Gn. Immunization with GP38-GnH-DS-Gc conferred 40% protection against lethal IbAr10200 challenge in mice. These data define the architecture of a GP38-Gn-Gc protomer and provide a template for structure-guided vaccine antigen development.

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Primary Citation of related structures