4JO3

Crystal structure of rabbit mAb R20 Fab in complex with V3 C-terminus of HIV-1 Consensus B gp120


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Rabbit Anti-HIV-1 Monoclonal Antibodies Raised by Immunization Can Mimic the Antigen-Binding Modes of Antibodies Derived from HIV-1-Infected Humans.

Pan, R.Sampson, J.M.Chen, Y.Vaine, M.Wang, S.Lu, S.Kong, X.P.

(2013) J Virol 87: 10221-10231

  • DOI: https://doi.org/10.1128/JVI.00843-13
  • Primary Citation of Related Structures:  
    4JO1, 4JO2, 4JO3, 4JO4

  • PubMed Abstract: 

    The rabbit is a commonly used animal model in studying antibody responses in HIV/AIDS vaccine development. However, no rabbit monoclonal antibodies (MAbs) have been developed previously to study the epitope-specific antibody responses against HIV-1 envelope (Env) glycoproteins, and little is known about how the rabbit immune system can mimic the human immune system in eliciting such antibodies. Here we present structural analyses of two rabbit MAbs, R56 and R20, against the third variable region (V3) of HIV-1 gp120. R56 recognizes the well-studied immunogenic region in the V3 crown, while R20 targets a less-studied region at the C terminus of V3. By comparison of the Fab/epitope complex structures of these two antibodies raised by immunization with that of the corresponding human antibodies derived from patients chronically infected with HIV-1, we found that rabbit antibodies can recognize immunogenic regions of gp120 and mimic the binding modes of human antibodies. This result can provide new insight into the use of the rabbit as an animal model in AIDS vaccine development.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
monoclonal anti-HIV-1 gp120 V3 antibody R20 light chainA [auth L],
D [auth M]
214Oryctolagus cuniculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
monoclonal anti-HIV-1 gp120 V3 antibody R20 heavy chainB [auth H],
E [auth I]
227Oryctolagus cuniculusMutation(s): 0 
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
gp120C [auth P],
F [auth Q]
15Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: env
UniProt
Find proteins for P35961 (Human immunodeficiency virus type 1 group M subtype B (isolate YU-2))
Explore P35961 
Go to UniProtKB:  P35961
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35961
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.223α = 90
b = 118.977β = 90
c = 134.946γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-09-04
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description