4P9M

Crystal structure of 8ANC195 Fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.212 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.6 of the entry. See complete history


Literature

Antibody 8ANC195 Reveals a Site of Broad Vulnerability on the HIV-1 Envelope Spike.

Scharf, L.Scheid, J.F.Lee, J.H.West, A.P.Chen, C.Gao, H.Gnanapragasam, P.N.Mares, R.Seaman, M.S.Ward, A.B.Nussenzweig, M.C.Bjorkman, P.J.

(2014) Cell Rep 7: 785-795

  • DOI: https://doi.org/10.1016/j.celrep.2014.04.001
  • Primary Citation of Related Structures:  
    4P9H, 4P9M

  • PubMed Abstract: 

    Broadly neutralizing antibodies (bNAbs) to HIV-1 envelope glycoprotein (Env) can prevent infection in animal models. Characterized bNAb targets, although key to vaccine and therapeutic strategies, are currently limited. We defined a new site of vulnerability by solving structures of bNAb 8ANC195 complexed with monomeric gp120 by X-ray crystallography and trimeric Env by electron microscopy. The site includes portions of gp41 and N-linked glycans adjacent to the CD4-binding site on gp120, making 8ANC195 the first donor-derived anti-HIV-1 bNAb with an epitope spanning both Env subunits. Rather than penetrating the glycan shield by using a single variable-region CDR loop, 8ANC195 inserted its entire heavy-chain variable domain into a gap to form a large interface with gp120 glycans and regions of the gp120 inner domain not contacted by other bNAbs. By isolating additional 8ANC195 clonal variants, we identified a more potent variant, which may be valuable for therapeutic approaches using bNAb combinations with nonoverlapping epitopes.


  • Organizational Affiliation

    Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
8ANC195 light chainA [auth L]215Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
8ANC195 Fab heavy chainB [auth H]244Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
C [auth H]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.212 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.482α = 90
b = 66.482β = 90
c = 219.034γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-21
    Type: Initial release
  • Version 1.1: 2014-06-04
    Changes: Data collection
  • Version 1.2: 2014-12-24
    Changes: Database references
  • Version 1.3: 2017-11-22
    Changes: Derived calculations, Refinement description, Source and taxonomy, Structure summary
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.6: 2024-10-23
    Changes: Structure summary