3Q6G

Crystal structure of Fab of rhesus mAb 2.5B specific for quaternary neutralizing epitope of HIV-1 gp120


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.902 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of Human and Macaque mAbs 2909 and 2.5B: Implications for the Configuration of the Quaternary Neutralizing Epitope of HIV-1 gp120.

Spurrier, B.Sampson, J.M.Totrov, M.Li, H.O'Neal, T.Williams, C.Robinson, J.Gorny, M.K.Zolla-Pazner, S.Kong, X.P.

(2011) Structure 19: 691-699

  • DOI: 10.1016/j.str.2011.02.012
  • Primary Citation of Related Structures:  3Q6F

  • PubMed Abstract: 
  • The quaternary neutralizing epitope (QNE) of HIV-1 gp120 is preferentially expressed on the trimeric envelope spikes of intact HIV virions, and QNE-specific monoclonal antibodies (mAbs) potently neutralize HIV-1. Here, we present the crystal structur ...

    The quaternary neutralizing epitope (QNE) of HIV-1 gp120 is preferentially expressed on the trimeric envelope spikes of intact HIV virions, and QNE-specific monoclonal antibodies (mAbs) potently neutralize HIV-1. Here, we present the crystal structures of the Fabs of human mAb 2909 and macaque mAb 2.5B. Both mAbs have long beta hairpin CDR H3 regions >20 Å in length that are each situated at the center of their respective antigen-binding sites. Computational analysis showed that the paratopes include the whole CDR H3, while additional CDR residues form shallow binding pockets. Structural modeling suggests a way to understand the configuration of QNEs and the antigen-antibody interaction for QNE mAbs. Our data will be useful in designing immunogens that may elicit potent neutralizing QNE Abs.


    Organizational Affiliation

    Department of Biochemistry, NYU School of Medicine, New York, NY 10016, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Light chain of Fab of rhesus mAb 2.5B
L, M
209N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Heavy chain of Fab of rhesus mAb 2.5B
H, I
234N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.902 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 77.836α = 90.00
b = 72.817β = 115.64
c = 88.898γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-03-20
    Type: Source and taxonomy