8ILQ

Structure of SFTSV Gn-Gc heterodimer


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM structure of severe fever with thrombocytopenia syndrome virus.

Du, S.Peng, R.Xu, W.Qu, X.Wang, Y.Wang, J.Li, L.Tian, M.Guan, Y.Wang, J.Wang, G.Li, H.Deng, L.Shi, X.Ma, Y.Liu, F.Sun, M.Wei, Z.Jin, N.Liu, W.Qi, J.Liu, Q.Liao, M.Li, C.

(2023) Nat Commun 14: 6333-6333

  • DOI: https://doi.org/10.1038/s41467-023-41804-7
  • Primary Citation of Related Structures:  
    8I4T, 8ILQ

  • PubMed Abstract: 

    The severe fever with thrombocytopenia syndrome virus (SFTSV) is a tick-borne human-infecting bunyavirus, which utilizes two envelope glycoproteins, Gn and Gc, to enter host cells. However, the structure and organization of these glycoproteins on virion surface are not yet known. Here we describe the structure of SFTSV determined by single particle reconstruction, which allows mechanistic insights into bunyavirus assembly at near-atomic resolution. The SFTSV Gn and Gc proteins exist as heterodimers and further assemble into pentameric and hexameric peplomers, shielding the Gc fusion loops by both intra- and inter-heterodimer interactions. Individual peplomers are associated mainly through the ectodomains, in which the highly conserved glycans on N914 of Gc play a crucial role. This elaborate assembly stabilizes Gc in the metastable prefusion conformation and creates some cryptic epitopes that are only accessible in the intermediate states during virus entry. These findings provide an important basis for developing vaccines and therapeutic drugs.


  • Organizational Affiliation

    Key Laboratory of Livestock Disease Prevention of Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Envelopment polyprotein560Severe fever with thrombocytopenia syndrome virusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for A0A4D6J0G9 (Dabie bandavirus)
Explore A0A4D6J0G9 
Go to UniProtKB:  A0A4D6J0G9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A4D6J0G9
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Envelopment polyprotein513Severe fever with thrombocytopenia syndrome virusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for A0A4D6J0G9 (Dabie bandavirus)
Explore A0A4D6J0G9 
Go to UniProtKB:  A0A4D6J0G9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A4D6J0G9
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.17

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China31972719

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-13
    Type: Initial release
  • Version 1.1: 2024-03-27
    Changes: Database references