4WUK

Crystal structure of apo CH65 Fab

  • Classification: IMMUNE SYSTEM
  • Expression System: Trichoplusia ni

  • Deposited: 2014-11-01 Released: 2015-02-25 
  • Deposition Author(s): Lee, P.S., Wilson, I.A.
  • Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure of the apo anti-influenza CH65 Fab.

Lee, P.S.Arnell, A.J.Wilson, I.A.

(2015) Acta Crystallogr.,Sect.F 71: 145-148

  • DOI: 10.1107/S2053230X14027599

  • PubMed Abstract: 
  • Influenza viruses remain a persistent challenge to human health owing to their inherent ability to evade the immune response by antigenic drift. However, the discovery of broadly neutralizing antibodies (bnAbs) against divergent viruses has sparked r ...

    Influenza viruses remain a persistent challenge to human health owing to their inherent ability to evade the immune response by antigenic drift. However, the discovery of broadly neutralizing antibodies (bnAbs) against divergent viruses has sparked renewed interest in a universal influenza vaccine and novel therapeutic opportunities. Here, a crystal structure at 1.70 Å resolution is presented of the Fab of the human antibody CH65, which has broad neutralizing activity against a range of seasonal H1 isolates. Previous studies proposed that affinity maturation of this antibody lineage pre-organizes the complementarity-determining region (CDR) loops into an energetically favorable HA-bound conformation. Indeed, from the structural comparisons of free and HA-bound CH65 presented here, the CDR loops, and in particular the heavy-chain CDR3, adopt the same conformations in the free and bound forms. Thus, these findings support the notion that affinity maturation of the CH65 lineage favorably preconfigures the CDR loops for high-affinity binding to influenza hemagglutinin.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CH65 heavy chain
H
235N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CH65 light chain
L
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

Download SDF File 
Download CCD File 
L
2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID
N-CYCLOHEXYLTAURINE; CHES
C8 H17 N O3 S
MKWKNSIESPFAQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 57.095α = 90.00
b = 67.024β = 90.00
c = 130.551γ = 90.00
Software Package:
Software NamePurpose
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 StatesR56 AI099275

Revision History 

  • Version 1.0: 2015-02-25
    Type: Initial release
  • Version 1.1: 2015-04-08
    Type: Other
  • Version 1.2: 2015-04-15
    Type: Database references
  • Version 1.3: 2017-09-13
    Type: Author supporting evidence, Derived calculations, Other, Source and taxonomy, Structure summary
  • Version 1.4: 2017-11-22
    Type: Refinement description