4B50

Crystal structure of the HIV-1 gp41 MPER-specific llama VHH 2H10


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.145 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

A Gp41 Mper-Specific Llama Vhh Requires a Hydrophobic Cdr3 for Neutralization But not for Antigen Recognition.

Lutje Hulsik, D.Liu, Y.Y.Strokappe, N.M.Battella, S.El Khattabi, M.Mccoy, L.E.Sabin, C.Hinz, A.Hock, M.Macheboeuf, P.Bonvin, A.M.Langedijk, J.P.Davis, D.Forsman Quigley, A.Aasa-Chapman, M.M.Seaman, M.S.Ramos, A.Poignard, P.Favier, A.Simorre, J.P.Weiss, R.A.Verrips, C.T.Weissenhorn, W.Rutten, L.

(2013) Plos Pathog. 9: 3202

  • DOI: 10.1371/journal.ppat.1003202

  • PubMed Abstract: 
  • The membrane proximal external region (MPER) of the HIV-1 glycoprotein gp41 is targeted by the broadly neutralizing antibodies 2F5 and 4E10. To date, no immunization regimen in animals or humans has produced HIV-1 neutralizing MPER-specific antibodie ...

    The membrane proximal external region (MPER) of the HIV-1 glycoprotein gp41 is targeted by the broadly neutralizing antibodies 2F5 and 4E10. To date, no immunization regimen in animals or humans has produced HIV-1 neutralizing MPER-specific antibodies. We immunized llamas with gp41-MPER proteoliposomes and selected a MPER-specific single chain antibody (VHH), 2H10, whose epitope overlaps with that of mAb 2F5. Bi-2H10, a bivalent form of 2H10, which displayed an approximately 20-fold increased affinity compared to the monovalent 2H10, neutralized various sensitive and resistant HIV-1 strains, as well as SHIV strains in TZM-bl cells. X-ray and NMR analyses combined with mutagenesis and modeling revealed that 2H10 recognizes its gp41 epitope in a helical conformation. Notably, tryptophan 100 at the tip of the long CDR3 is not required for gp41 interaction but essential for neutralization. Thus bi-2H10 is an anti-MPER antibody generated by immunization that requires hydrophobic CDR3 determinants in addition to epitope recognition for neutralization similar to the mode of neutralization employed by mAbs 2F5 and 4E10.


    Organizational Affiliation

    Unit of Virus Host Cell Interactions (UVHCI), UMI 3265, Université Joseph Fourier-EMBL-CNRS, Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2H10 LLAMA VHH
A
122N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.145 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 89.950α = 90.00
b = 89.950β = 90.00
c = 89.950γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHASERphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release