1TJI

Crystal Structure of the broadly neutralizing anti-HIV-1 antibody 2F5 in complex with a gp41 17mer epitope


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and mechanistic analysis of the Anti-Human Immunodeficiency Virus type 1 antibody 2F5 in complex with its gp41 epitope

Ofek, G.Tang, M.Sambor, A.Katinger, H.Mascola, J.R.Wyatt, R.Kwong, P.D.

(2004) J.Virol. 78: 10724-10737

  • DOI: 10.1128/JVI.78.19.10724-10737.2004
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The membrane-proximal region of the ectodomain of the gp41 envelope glycoprotein of human immunodeficiency virus type 1 (HIV-1) is the target of three of the five broadly neutralizing anti-HIV-1 antibodies thus far isolated. We have determined crysta ...

    The membrane-proximal region of the ectodomain of the gp41 envelope glycoprotein of human immunodeficiency virus type 1 (HIV-1) is the target of three of the five broadly neutralizing anti-HIV-1 antibodies thus far isolated. We have determined crystal structures of the antigen-binding fragment for one of these antibodies, 2F5, in complex with 7-mer, 11-mer, and 17-mer peptides of the gp41 membrane-proximal region, at 2.0-, 2.1-, and 2.2-A resolutions, respectively. The structures reveal an extended gp41 conformation, which stretches over 30 A in length. Contacts are made with five complementarity-determining regions of the antibody as well as with nonpolymorphic regions. Only one exclusive charged face of the gp41 epitope is bound by 2F5, while the nonbound face, which is hydrophobic, may be hidden due to occlusion by other portions of the ectodomain. The structures reveal that the 2F5 antibody is uniquely built to bind to an epitope that is proximal to a membrane surface and in a manner mostly unaffected by large-scale steric hindrance. Biochemical studies with proteoliposomes confirm the importance of lipid membrane and hydrophobic context in the binding of 2F5 as well as in the binding of 4E10, another broadly neutralizing antibody that recognizes the membrane-proximal region of gp41. Based on these structural and biochemical results, immunization strategies for eliciting 2F5- and 4E10-like broadly neutralizing anti-HIV-1 antibodies are proposed.


    Organizational Affiliation

    Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Instiutes of Health, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
anti-HIV-1 antibody 2F5 Light Chain
L
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
anti-HIV-1 antibody 2F5 Heavy Chain
H
237N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Envelope Glycoprotein GP41
P
18Human immunodeficiency virus type 1 group M subtype DMutation(s): 0 
Gene Names: env
Find proteins for P04580 (Human immunodeficiency virus type 1 group M subtype D)
Go to UniProtKB:  P04580
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
H, L
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download SDF File 
Download CCD File 
H, L
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
P
NON-POLYMERH2 N

--

YCM
Query on YCM
H, L
L-PEPTIDE LINKINGC5 H10 N2 O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.660α = 90.00
b = 63.684β = 90.00
c = 178.375γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance