8HXC

Cryo-EM structure of MPXV M2 heptamer in complex with human B7.2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural and functional insights into the modulation of T cell costimulation by monkeypox virus protein M2.

Yang, S.Wang, Y.Yu, F.Cheng, R.Zhang, Y.Zhou, D.Ren, X.Deng, Z.Zhao, H.

(2023) Nat Commun 14: 5186-5186

  • DOI: https://doi.org/10.1038/s41467-023-40748-2
  • Primary Citation of Related Structures:  
    8HXA, 8HXB, 8HXC

  • PubMed Abstract: 

    The rapid spread of monkeypox in multiple countries has resulted in a global public health threat and has caused international concerns since May 2022. Poxvirus encoded M2 protein is a member of the poxvirus immune evasion family and plays roles in host immunomodulation via the regulation of innate immune response mediated by the NF-κB pathway and adaptive immune response mediated by B7 ligands. However, the interaction of monkeypox virus (MPXV) M2 with B7 ligands and structural insight into poxviral M2 function have remained elusive. Here we reveal that MPXV M2, co-existing as a hexamer and a heptamer, recognizes human B7.1 and B7.2 (hB7.1/2) with high avidities. The binding of oligomeric MPXV M2 interrupts the interactions of hB7.1/2 with CD28 and CTLA4 and subverts T cell activation mediated by B7.1/2 costimulatory signals. Cryo-EM structures of M2 in complex with hB7.1/2 show that M2 binds to the shallow concave face of hB7.1/2 and displays sterically competition with CD28 and CTLA4 for the binding to hB7.1/2. Our findings provide structural mechanisms of poxviral M2 function and immune evasion deployed by poxviruses.


  • Organizational Affiliation

    State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NFkB inhibitor
A, B, C, D, E
A, B, C, D, E, F, G
203Monkeypox virusMutation(s): 0 
Gene Names: O2L
UniProt
Find proteins for A0A7H0DN11 (Monkeypox virus)
Explore A0A7H0DN11 
Go to UniProtKB:  A0A7H0DN11
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A7H0DN11
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
T-lymphocyte activation antigen CD86
H, I, J, K, L
H, I, J, K, L, M, N
213Homo sapiensMutation(s): 0 
Gene Names: CD86CD28LG2
UniProt & NIH Common Fund Data Resources
Find proteins for P42081 (Homo sapiens)
Explore P42081 
Go to UniProtKB:  P42081
PHAROS:  P42081
GTEx:  ENSG00000114013 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42081
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2023-08-30
    Type: Initial release
  • Version 1.1: 2023-12-13
    Changes: Database references
  • Version 1.2: 2024-11-20
    Changes: Data collection, Structure summary