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CRYSTAL STRUCTURE OF THE MURINE CLASS II ALLELE I-A(G7) COMPLEXED WITH THE GLUTAMIC ACID DECARBOXYLASE (GAD65) PEPTIDE 207-220


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A structural framework for deciphering the link between I-Ag7 and autoimmune diabetes.

Corper, A.L.Stratmann, T.Apostolopoulos, V.Scott, C.A.Garcia, K.C.Kang, A.S.Wilson, I.A.Teyton, L.

(2000) Science 288: 505-511


  • PubMed Abstract: 
  • Susceptibility to murine and human insulin-dependent diabetes mellitus correlates strongly with major histocompatibility complex (MHC) class II I-A or HLA-DQ alleles that lack an aspartic acid at position beta57. I-Ag7 lacks this aspartate and is the ...

    Susceptibility to murine and human insulin-dependent diabetes mellitus correlates strongly with major histocompatibility complex (MHC) class II I-A or HLA-DQ alleles that lack an aspartic acid at position beta57. I-Ag7 lacks this aspartate and is the only class II allele expressed by the nonobese diabetic mouse. The crystal structure of I-Ag7 was determined at 2.6 angstrom resolution as a complex with a high-affinity peptide from the autoantigen glutamic acid decarboxylase (GAD) 65. I-Ag7 has a substantially wider peptide-binding groove around beta57, which accounts for distinct peptide preferences compared with other MHC class II alleles. Loss of Asp(beta57) leads to an oxyanion hole in I-Ag7 that can be filled by peptide carboxyl residues or, perhaps, through interaction with the T cell receptor.


    Organizational Affiliation

    Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN
A
190Mus musculusMutation(s): 0 
Gene Names: H2-Aa
Find proteins for P04228 (Mus musculus)
Go to UniProtKB:  P04228
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
65 KD GLUTAMIC ACID DECARBOXYLASE+H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN
B
221Homo sapiensMutation(s): 0 
Gene Names: GAD2 (GAD65)
EC: 4.1.1.15
Find proteins for Q05329 (Homo sapiens)
Go to Gene View: GAD2
Go to UniProtKB:  Q05329
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.210 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 95.149α = 90.00
b = 110.123β = 90.00
c = 96.084γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CCP4data scaling
CNSrefinement
DENZOdata reduction
TRUNCATEdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-06-28
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-08-23
    Type: Refinement description, Source and taxonomy