6LQN

EBV tegument protein BBRF2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of Epstein-Barr virus tegument protein complex BBRF2-BSRF1 reveals its potential role in viral envelopment.

He, H.P.Luo, M.Cao, Y.L.Lin, Y.X.Zhang, H.Zhang, X.Ou, J.Y.Yu, B.Chen, X.Xu, M.Feng, L.Zeng, M.S.Zeng, Y.X.Gao, S.

(2020) Nat Commun 11: 5405-5405

  • DOI: https://doi.org/10.1038/s41467-020-19259-x
  • Primary Citation of Related Structures:  
    6LQN, 6LQO

  • PubMed Abstract: 

    Epstein-Barr virus (EBV) is a γ-herpesvirus associated with the occurrence of several human malignancies. BBRF2 and BSRF1 are two EBV tegument proteins that have been suggested to form a hetero-complex and mediate viral envelopment, but the molecular basis of their interaction and the functional mechanism of this complex remains unknown. Here, we present crystal structures of BBRF2 alone and in complex with BSRF1. BBRF2 has a compact globular architecture featuring a central β-sheet that is surrounded by 10 helices, it represents a novel fold distinct from other known protein structures. The central portion of BSRF1 folds into two tightly associated antiparallel α-helices, forming a composite four-helix bundle with two α-helices from BBRF2 via a massive hydrophobic network. In vitro, a BSRF1-derived peptide binds to BBRF2 and reduces the number of viral genome copies in EBV-positive cells. Exogenous BBRF2 and BSRF1 co-localize at the Golgi apparatus. Furthermore, BBRF2 binds capsid and capsid-associated proteins, whereas BSRF1 associates with glycoproteins. These findings indicate that the BBRF2-BSRF1 complex tethers EBV nucleocapsids to the glycoprotein-enriched Golgi membrane, facilitating secondary envelopment.


  • Organizational Affiliation

    State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cytoplasmic envelopment protein 1269human gammaherpesvirus 4Mutation(s): 0 
Gene Names: BBRF2
UniProt
Find proteins for P29882 (Epstein-Barr virus (strain B95-8))
Explore P29882 
Go to UniProtKB:  P29882
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29882
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.32α = 90
b = 61.57β = 90
c = 58.11γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


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

Revision History  (Full details and data files)

  • Version 1.0: 2020-10-07
    Type: Initial release
  • Version 1.1: 2021-04-21
    Changes: Database references
  • Version 1.2: 2024-10-09
    Changes: Data collection, Database references, Structure summary