1TMC

THE THREE-DIMENSIONAL STRUCTURE OF A CLASS I MAJOR HISTOCOMPATIBILITY COMPLEX MOLECULE MISSING THE ALPHA3 DOMAIN OF THE HEAVY CHAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The three-dimensional structure of a class I major histocompatibility complex molecule missing the alpha 3 domain of the heavy chain.

Collins, E.J.Garboczi, D.N.Karpusas, M.N.Wiley, D.C.

(1995) Proc.Natl.Acad.Sci.USA 92: 1218-1221


  • PubMed Abstract: 
  • Class I major histocompatibility complex (MHC) molecules are ternary complexes of the soluble serum protein beta 2-microglobulin, MHC heavy chain, and bound peptide. The first two domains (alpha 1, alpha 2) of the heavy chain create the peptide bindi ...

    Class I major histocompatibility complex (MHC) molecules are ternary complexes of the soluble serum protein beta 2-microglobulin, MHC heavy chain, and bound peptide. The first two domains (alpha 1, alpha 2) of the heavy chain create the peptide binding cleft and the surface that contacts the T-cell receptor. The third domain (alpha 3) associates with the T-cell co-receptor, CD8, during T-cell recognition. Here we describe the x-ray crystal structure of a human class I MHC molecule, HLA-Aw68, from which the alpha 3 domain has been proteolytically removed. The resulting molecule shows no gross morphological changes compared to the intact protein. A decameric peptide complexed with the intact HLA-Aw68 is seen to bind to the proteolized molecule in the conventional manner, demonstrating that the alpha 3 domain is not required for the structural integrity of the molecule or for peptide binding.


    Related Citations: 
    • The Foreign Antigen Binding Site and T Cell Recognition Regions of Class I Histocompatibility Antigens
      Bjorkman, P.J.,Saper, M.A.,Samraoui, B.,Bennett, W.S.,Strominger, J.L.,Wiley, D.C.
      (1987) Nature 329: 512
    • Comparison of the P2 Specificity Pocket in Three Human Histocompatibility Antigens: Hla-A(Asterisk)6801,Hla-A(Asterisk)0201, and Hla-B(Asterisk)2705
      Guo, H.-C.,Madden, D.R.,Silver, M.L.,Jardetzky, T.S.,Gorga, J.C.,Strominger, J.L.,Wiley, D.C.
      (1993) Proc.Natl.Acad.Sci.USA 90: 8053
    • Structure of the Human Class I Histocompatibility Antigen, Hla-A2
      Bjorkman, P.J.,Saper, M.A.,Samraoui, B.,Bennett, W.S.,Strominger, J.L.,Wiley, D.C.
      (1987) Nature 329: 506
    • Crystallization and X-Ray Diffraction Studies on the Histocompatibility Antigens Hla-A2 and Hla-A28 from Human Cell Membranes
      Bjorkman, P.J.,Strominger, J.L.,Wiley, D.C.
      (1985) J.Mol.Biol. 186: 205
    • Refined Structure of the Human Histocompatibility Antigen Hla-A2 at 2.6 Angstroms Resolution
      Saper, M.A.,Bjorkman, P.J.,Wiley, D.C.
      (1991) J.Mol.Biol. 219: 277
    • Five Viral Peptide-Hla-A2 Co-Crystals: Simultaneous Space Group Determination and X-Ray Data Collection
      Garboczi, D.N.,Madden, D.R.,Wiley, D.C.
      (1994) J.Mol.Biol. 239: 581
    • Different Length Peptides Bind to Hla-Aw68 Similarly at Their Ends But Bulge Out in the Middle
      Guo, H.-C.,Jardetzky, T.S.,Garrett, T.P.J.,Lane, W.S.,Strominger, J.L.,Wiley, D.C.
      (1992) Nature 360: 364
    • The Antigenic Identity of Peptide-Mhc Complexes: A Comparison of the Conformations of Five Viral Peptides Presented by Hla-A2
      Madden, D.R.,Garboczi, D.N.,Wiley, D.C.
      (1993) Cell 75: 693
    • Hla-A2-Peptide Complexes: Refolding and Crystallization of Molecules Expressed in Escherichia Coli and Complexed with Single Antigenic Peptides
      Garboczi, D.N.,Hung, D.T.,Wiley, D.C.
      (1992) Proc.Natl.Acad.Sci.USA 89: 3429


    Organizational Affiliation

    Department of Molecular and Cellular Biology, Howard Hughes Medical Institute, Harvard University, Cambridge, MA 02138.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA-AW68)
A
175Homo sapiensMutation(s): 0 
Gene Names: HLA-A (HLAA)
Find proteins for P01891 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P01891
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA 2-MICROGLOBULIN
B
100Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DECAMERIC PEPTIDE (EVAPPEYHRK)
C
10N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 48.230α = 90.00
b = 58.050β = 90.00
c = 109.530γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-03-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance