4U6V

Mechanisms of Neutralization of a Human Anti-Alpha Toxin Antibody


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanisms of Neutralization of a Human Anti-alpha-toxin Antibody.

Oganesyan, V.Peng, L.Damschroder, M.M.Cheng, L.Sadowska, A.Tkaczyk, C.Sellman, B.R.Wu, H.Dall'Acqua, W.F.

(2014) J Biol Chem 289: 29874-29880

  • DOI: 10.1074/jbc.M114.601328
  • Primary Citation of Related Structures:  
    4U6V

  • PubMed Abstract: 
  • MEDI4893 is a neutralizing human monoclonal antibody that targets α-toxin (AT) and is currently undergoing evaluation in the field of Staphylococcus aureus-mediated diseases. We have solved the crystal structure of MEDI4893 Fab bound to monomeric AT ...

    MEDI4893 is a neutralizing human monoclonal antibody that targets α-toxin (AT) and is currently undergoing evaluation in the field of Staphylococcus aureus-mediated diseases. We have solved the crystal structure of MEDI4893 Fab bound to monomeric AT at a resolution of 2.56 Å and further characterized its epitope using various engineered AT variants. We have found that MEDI4893 recognizes a novel epitope in the so-called "rim" domain of AT and exerts its neutralizing effect through a dual mechanism. In particular, MEDI4893 not only sterically blocks binding of AT to its cell receptor but also prevents it from adopting a lytic heptameric trans-membrane conformation.


    Organizational Affiliation

    From the Departments of Antibody Discovery and Protein Engineering and dallacquaw@medimmune.com.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fab, antigen binding fragment, heavy chainHK225Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fab, antigen binding fragment, light chainLM213Homo sapiensMutation(s): 0 
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-hemolysinAB293Staphylococcus aureus subsp. aureus TCH60Mutation(s): 0 
Find proteins for Q2G1X0 (Staphylococcus aureus (strain NCTC 8325 / PS 47))
Explore Q2G1X0 
Go to UniProtKB:  Q2G1X0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, H, K
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.524α = 90
b = 148.505β = 99.82
c = 93.824γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2014-09-24
    Changes: Database references
  • Version 1.2: 2014-11-05
    Changes: Database references