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: 2.30 Å
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 

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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 U S A 92: 1218-1221

  • DOI: 10.1073/pnas.92.4.1218
  • Primary Citation of Related Structures:  
    1TMC

  • 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 binding cleft and the surface that contacts the T-cell receptor ...

    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: 
    • 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
    • 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
    • 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 U S A 90: 8053
    • 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
    • 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 U S A 89: 3429
    • 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
    • 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
    • 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
    • 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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA-AW68)A175Homo sapiensMutation(s): 0 
Gene Names: BETA-2-MICROGLOBULINHLA-AHLAA
Find proteins for P04439 (Homo sapiens)
Explore P04439 
Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BETA 2-MICROGLOBULINB100Homo sapiensMutation(s): 0 
Gene Names: BETA-2-MICROGLOBULINB2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DECAMERIC PEPTIDE (EVAPPEYHRK)C10N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.23α = 90
b = 58.05β = 90
c = 109.53γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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