6DB6

Crystal structure of anti-HIV-1 V3 Fab 311-11D in complex with a HIV-1 gp120 V3 peptide from MN strain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.978 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Comparison of Human Anti-HIV-1 gp120 V3 Monoclonal Antibodies of the Same Gene Usage Induced by Vaccination and Chronic Infection.

Chan, K.W.Pan, R.Costa, M.Gorny, M.K.Wang, S.Lu, S.Kong, X.P.

(2018) J. Virol. 92: --

  • DOI: 10.1128/JVI.00641-18
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Elucidating the structural basis of antibody (Ab) gene usage and affinity maturation of vaccine-induced Abs can inform the design of immunogens for inducing desired Ab responses in HIV vaccine development. Analyses of monoclonal Abs (MAbs) encoded by ...

    Elucidating the structural basis of antibody (Ab) gene usage and affinity maturation of vaccine-induced Abs can inform the design of immunogens for inducing desired Ab responses in HIV vaccine development. Analyses of monoclonal Abs (MAbs) encoded by the same immunoglobulin genes at different stages of maturation can help to elucidate the maturation process. We have analyzed four human anti-V3 MAbs with the same VH1-3*01 and VL3-10*01 gene usage. Two MAbs, TA6 and TA7, were developed from a vaccinee in the HIV vaccine phase I trial DP6-001 with a polyvalent DNA prime/protein boost regimen, and two others, 311-11D and 1334, were developed from HIV-infected patients. The somatic hypermutation (SHM) rates in VH of vaccine-induced MAbs are lower than in chronic HIV infection-induced MAbs, while those in VL are comparable. Crystal structures of the antigen-binding fragments (Fabs) in complex with V3 peptides show that these MAbs bind the V3 epitope with a new cradle-binding mode and that the V3 β-hairpin lies along the antigen-binding groove, which consists of residues from both heavy and light chains. Residues conserved from the germ line sequences form specific binding pockets accommodating conserved structural elements of the V3 crown hairpin, predetermining the Ab gene selection, while somatically mutated residues create additional hydrogen bonds, electrostatic interactions, and van der Waals contacts, correlating with an increased binding affinity. Our data provide a unique example of germ line sequences determining the primordial antigen-binding sites and SHMs correlating with affinity maturation of Abs induced by vaccine and natural HIV infection. IMPORTANCE Understanding the structural basis of gene usage and affinity maturation for anti-HIV-1 antibodies may help vaccine design and development. Antibodies targeting the highly immunogenic third variable loop (V3) of HIV-1 gp120 provide a unique opportunity for detailed structural investigations. By comparing the sequences and structures of four anti-V3 MAbs at different stages of affinity maturation but of the same V gene usage, two induced by vaccination and another two by chronic infection, we provide a fine example of how germ line sequence determines the essential elements for epitope recognition and how affinity maturation improves the antibody's recognition of its epitope.


    Organizational Affiliation

    Department of Biochemistry and Molecular Pharmacology, NYU School of Medicine, New York, New York, USA.,Department of Biochemistry and Molecular Pharmacology, NYU School of Medicine, New York, New York, USA xiangpeng.kong@med.nyu.edu.,Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA.,Department of Pathology, NYU School of Medicine, New York, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Human monoclonal anti-HIV-1 gp120 V3 antibody 311-11D Fab heavy chain
H
230N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Human monoclonal anti-HIV-1 gp120 V3 antibody 311-11D Fab light chain
L
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
HIV-1 gp120 V3 peptide from MN strain
P
23Human immunodeficiency virus type 1 group M subtype B (isolate MN)Mutation(s): 0 
Gene Names: env
Find proteins for P05877 (Human immunodeficiency virus type 1 group M subtype B (isolate MN))
Go to UniProtKB:  P05877
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAN
Query on MAN

Download SDF File 
Download CCD File 
H
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
H
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
FCA
Query on FCA

Download SDF File 
Download CCD File 
H
ALPHA-D-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-PHYPRBDBSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
H
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.978 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.568α = 90.00
b = 69.157β = 90.00
c = 141.887γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
PHASERphasing
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI100151
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI082676
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI082274
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI087191
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI112546

Revision History 

  • Version 1.0: 2018-07-11
    Type: Initial release
  • Version 1.1: 2018-07-25
    Type: Data collection, Database references
  • Version 1.2: 2018-09-12
    Type: Data collection, Database references