Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 45.55 kDa 
• Atom Count: 3,206 
• Modelled Residue Count: 422 
• Deposited Residue Count: 422 
• Unique protein chains: 2

 4UOM

Electron Cryo-microscopy of Venezuelan Equine Encephalitis Virus TC- 83 in complex with neutralizing antibody Fab F5

• PDB DOI: 10.2210/pdb4UOM/pdb
• EM Map EMD-2645: EMDB EMDataResource

• Classification: VIRAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2014-06-05 Released: 2014-10-15 
• Deposition Author(s): Porta, J., Jose, J., Roehrig, J.T., Blair, C.D., Kuhn, R.J., Rossmann, M.G.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 17.0 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Locking and Blocking the Viral Landscape of an Alphavirus with Neutralizing Antibodies.

Porta, J., Jose, J., Roehrig, J.T., Blair, C.D., Kuhn, R.J., Rossmann, M.G.

(2014) J Virol 88: 9616

• PubMed: 24920796 
• DOI: 10.1128/JVI.01286-14
• Primary Citation of Related Structures:  
  4UOK, 4UOM


• PubMed Abstract: 
  

Alphaviruses are serious, sometimes lethal human pathogens that belong to the family Togaviridae. The structures of human Venezuelan equine encephalitis virus (VEEV), an alphavirus, in complex with two strongly neutralizing antibody Fab fragments (F5 and 3B4C-4) have been determined using a combination of cryo-electron microscopy and homology modeling. We characterize these monoclonal antibody Fab fragments, which are known to abrogate VEEV infectivity by binding to the E2 (envelope) surface glycoprotein. Both of these antibody Fab fragments cross-link the surface E2 glycoproteins and therefore probably inhibit infectivity by blocking the conformational changes that are required for making the virus fusogenic. The F5 Fab fragment cross-links E2 proteins within one trimeric spike, whereas the 3B4C-4 Fab fragment cross-links E2 proteins from neighboring spikes. Furthermore, F5 probably blocks the receptor-binding site, whereas 3B4C-4 sterically hinders the exposure of the fusion loop at the end of the E2 B-domain.

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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, Indiana, USA [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FAB FRAGMENT HEAVY CHAIN	A [auth H]	217	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
FAB FRAGMENT LIGHT CHAIN	B [auth L]	205	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 17.0 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-10-15 
Deposition Author(s): Porta, J., Jose, J., Roehrig, J.T., Blair, C.D., Kuhn, R.J., Rossmann, M.G.

Revision History  

• Version 1.0: 2014-10-15
  Type: Initial release
  
• Version 1.1: 2017-08-23
  Changes: Data collection