2GSG | pdb_00002gsg

Crystal structure of the Fv fragment of a monoclonal antibody specific for poly-glutamine

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 
    0.253 (Depositor) 
  • R-Value Work: 
    0.229 (Depositor), 0.222 (DCC) 
  • R-Value Observed: 
    0.229 (Depositor) 

wwPDB Validation 3D Report Full Report

Validation slider image for 2GSG

This is version 1.3 of the entry. See complete history. 

Literature

The structure of a polyQ-anti-polyQ complex reveals binding according to a linear lattice model.

Li, P., Huey-Tubman, K.E., Gao, T., Li, X., West Jr., A.P., Bennett, M.J., Bjorkman, P.J.

(2007) Nat Struct Mol Biol 14: 381-387

  • DOI: https://doi.org/10.1038/nsmb1234
  • Primary Citation Related Structures: 
    2GSG

  • PubMed Abstract: 

    Huntington and related neurological diseases result from expansion of a polyglutamine (polyQ) tract. The linear lattice model for the structure and binding properties of polyQ proposes that both expanded and normal polyQ tracts in the preaggregation state are random-coil structures but that an expanded polyQ repeat contains a larger number of epitopes recognized by antibodies or other proteins. The crystal structure of polyQ bound to MW1, an antibody against polyQ, reveals that polyQ adopts an extended, coil-like structure. Consistent with the linear lattice model, multimeric MW1 Fvs bind more tightly to longer than to shorter polyQ tracts and, compared with monomeric Fv, bind expanded polyQ repeats with higher apparent affinities. These results suggest a mechanism for the toxicity of expanded polyQ and a strategy to link anti-polyQ compounds to create high-avidity therapeutics.

    • Organizational Affiliation: 
    • Division of Biology 114-96, California Institute of Technology, Pasadena, California 91125, USA. pingwei@neo.tamu.edu

Macromolecule Content 

  • Total Structure Weight: 51.95 kDa 
  • Atom Count: 3,926 
  • Modeled Residue Count: 464 
  • Deposited Residue Count: 468 
  • Unique protein chains: 2

Macromolecules

Find similar proteins by:
|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
monoclonal antibody light chain
A, C
116Mus musculusMutation(s): 0 
Find similar proteins by:
|  3D Structure
Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
monoclonal antibody heavy chain
B, D
118Mus musculusMutation(s): 0 

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free:  0.253 (Depositor) 
  • R-Value Work:  0.229 (Depositor), 0.222 (DCC) 
  • R-Value Observed: 0.229 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 162.876α = 90
b = 78.096β = 90
c = 50.697γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
MOLREPphasing
CNSrefinement
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-10-30
    Changes: Data collection, Database references, Derived calculations, Structure summary