9OG1 | pdb_00009og1

Globular domain of monkeypox virus OPG153 (A28) bound to antibody 02M12

• PDB DOI: https://doi.org/10.2210/pdb9OG1/pdb
• EM Map EMD-70449: EMDB EMDataResource

• Classification: VIRAL PROTEIN
• Organism(s): Monkeypox virus, Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-04-30 Released: 2025-12-24 
• Deposition Author(s): Rundlet, E.J., Zhou, L., McLellan, J.S.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Antigen-agnostic identification of poxvirus broadly neutralizing antibodies targeting OPG153.

Paciello, I., Rundlet, E.J., Zhou, L., Realini, G., Perrone, F., Pierleoni, G., Troisi, M., Postal, J., Guivel-Benhassine, F., Porrot, F., Mullins, C.M., Moschese, D., Cossu, M.V., Sabaini, F., Accordini, S., Gianesini, N., Passarelli Mantovani, R., Panza, F., Fabbiani, M., Tumbarello, M., Antinori, S., Castilletti, C., Montagnani, F., Schwartz, O., Rappuoli, R., McLellan, J.S., Andreano, E.

(2025) Sci Transl Med 17: eaeb3840-eaeb3840

• PubMed: 41370398 
• DOI: https://doi.org/10.1126/scitranslmed.aeb3840
• Primary Citation of Related Structures:  
  9OG1, 9OG2


• PubMed Abstract: 
  

  Recurrent mpox outbreaks caused by the monkeypox virus (MPXV) have prompted the World Health Organization to declare a Public Health Emergency of International Concern and have stimulated the development of medical interventions. Here, we used antigen-agnostic identification of MPXV-neutralizing monoclonal antibodies from convalescent or vaccinated people, AlphaFold 3-based predictive modeling, and cryo-electron microscopy to identify the protein encoded by orthopoxviral gene (OPG) 153 (MPXV A28) as a target of broadly neutralizing antibodies. OPG153-targeting antibodies neutralized MPXV clades Ib and IIb and vaccinia virus (VACV) and cross-reacted with OPG153 orthologs from cowpox and variola viruses. Immunization with MPXV OPG153 elicited a potent neutralizing antibody response against MPXV and VACV in mice, substantiating OPG153 as both a promising vaccine antigen and a potent target for preventive and therapeutic antibodies.

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Organizational Affiliation: 
• Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena 53100, Italy.
Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA.
Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena 53100, Italy.
Institut Pasteur, Virus and Immunity Unit, Université Paris Cité, Paris 75015, France.
Vaccine Research Institute, Créteil 94000, France.
Department of Infectious Diseases, ASST Fatebenefratelli Sacco, Milano 20157, Italy.
Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, Milan 20157, Italy.
III Division of Infectious Diseases, Luigi Sacco Hospital, ASST Fatebenefratelli Sacco, Milan 20157, Italy.
Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, Verona 37024, Italy.
Department of Medical Sciences, Infectious and Tropical Diseases Unit, Azienda Ospedaliero-Universitaria Senese, Siena 53100, Italy.
Department of Medical Biotechnologies, University of Siena, Siena 53100, Italy.
Fondazione Biotecnopolo di Siena, Siena 53100, Italy.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 74.04 kDa 
• Atom Count: 4,606 
• Modeled Residue Count: 574 
• Deposited Residue Count: 655 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
A28L	A	416	Monkeypox virus	Mutation(s): 0  Gene Names: A28L
UniProt
Find proteins for Q8V4V0 (Monkeypox virus (strain Zaire-96-I-16)) Explore Q8V4V0  Go to UniProtKB:  Q8V4V0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Monoclonal antibody 02M12 heavy chain	B	127	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Monoclonal antibody 02M12 light chain	C	112	Homo sapiens	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	B	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.1_5286:

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-24 
Deposition Author(s): Rundlet, E.J., Zhou, L., McLellan, J.S.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2025-12-24
  Type: Initial release