5JR1

Crystal structure of 10E8 gHV-matureL antigen-binding fragment.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.601 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Developmental Pathway of the MPER-Directed HIV-1-Neutralizing Antibody 10E8.

Soto, C.Ofek, G.Joyce, M.G.Zhang, B.McKee, K.Longo, N.S.Yang, Y.Huang, J.Parks, R.Eudailey, J.Lloyd, K.E.Alam, S.M.Haynes, B.F.Mullikin, J.C.Connors, M.Mascola, J.R.Shapiro, L.Kwong, P.D.

(2016) Plos One 11: e0157409-e0157409

  • DOI: 10.1371/journal.pone.0157409
  • Primary Citation of Related Structures:  5JNY, 5JO5

  • PubMed Abstract: 
  • Antibody 10E8 targets the membrane-proximal external region (MPER) of HIV-1 gp41, neutralizes >97% of HIV-1 isolates, and lacks the auto-reactivity often associated with MPER-directed antibodies. The developmental pathway of 10E8 might therefore serv ...

    Antibody 10E8 targets the membrane-proximal external region (MPER) of HIV-1 gp41, neutralizes >97% of HIV-1 isolates, and lacks the auto-reactivity often associated with MPER-directed antibodies. The developmental pathway of 10E8 might therefore serve as a promising template for vaccine design, but samples from time-of-infection-often used to infer the B cell record-are unavailable. In this study, we used crystallography, next-generation sequencing (NGS), and functional assessments to infer the 10E8 developmental pathway from a single time point. Mutational analysis indicated somatic hypermutation of the 2nd-heavy chain-complementarity determining region (CDR H2) to be critical for neutralization, and structures of 10E8 variants with V-gene regions reverted to genomic origin for heavy-and-light chains or heavy chain-only showed structural differences >2 Å relative to mature 10E8 in the CDR H2 and H3. To understand these developmental changes, we used bioinformatic sieving, maximum likelihood, and parsimony analyses of immunoglobulin transcripts to identify 10E8-lineage members, to infer the 10E8-unmutated common ancestor (UCA), and to calculate 10E8-developmental intermediates. We were assisted in this analysis by the preservation of a critical D-gene segment, which was unmutated in most 10E8-lineage sequences. UCA and early intermediates weakly bound a 26-residue-MPER peptide, whereas HIV-1 neutralization and epitope recognition in liposomes were only observed with late intermediates. Antibody 10E8 thus develops from a UCA with weak MPER affinity and substantial differences in CDR H2 and H3 from the mature 10E8; only after extensive somatic hypermutation do 10E8-lineage members gain recognition in the context of membrane and HIV-1 neutralization.


    Organizational Affiliation

    Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
10E8 heavy chain
H
236N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
10E8 mature light chain
L
215N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
H, L
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.601 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 68.784α = 90.00
b = 77.863β = 90.00
c = 85.003γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-07-13
    Type: Initial release