1B3J

STRUCTURE OF THE MHC CLASS I HOMOLOG MIC-A, A GAMMADELTA T CELL LIGAND


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report



Literature

Crystal structure of the MHC class I homolog MIC-A, a gammadelta T cell ligand.

Li, P.Willie, S.T.Bauer, S.Morris, D.L.Spies, T.Strong, R.K.

(1999) Immunity 10: 577-584

  • DOI: 10.1016/s1074-7613(00)80057-6
  • Primary Citation of Related Structures:  
    1B3J

  • PubMed Abstract: 
  • The major histocompatibility complex (MHC) class I homolog MIC-A functions as a stress-inducible antigen that is recognized by a subset of gammadelta T cells independent of beta2-microglobulin and bound peptides. Its crystal structure reveals a drama ...

    The major histocompatibility complex (MHC) class I homolog MIC-A functions as a stress-inducible antigen that is recognized by a subset of gammadelta T cells independent of beta2-microglobulin and bound peptides. Its crystal structure reveals a dramatically altered MHC class I fold, both in detail and overall domain organization. The only remnant of a peptide-binding groove is a small cavity formed as the result of disordering a large section of one of the groove-defining helices. Loss of beta2-microglobulin binding is due to a restructuring of the interaction interfaces. Structural mapping of sequence variation suggests potential receptor binding sites on the underside of the platform on the side opposite of the surface recognized by alphabeta T cell receptors on MHC class I-peptide complexes.


    Related Citations: 
    • Expression, Purification, Crystallization and Cryst Graphic Charatterization of the Human Mhc Class I R Protein Mica
      Bauer, S., Willie, S.T., Spies, T., Strong, R.K.
      (1998) Acta Crystallogr D Biol Crystallogr 54: 451

    Organizational Affiliation

    Division of Basic Science, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MHC CLASS I HOMOLOG MIC-AA274Homo sapiensMutation(s): 0 
Gene Names: MICA-001MICAPERB11.1
Find proteins for Q29983 (Homo sapiens)
Explore Q29983 
Go to UniProtKB:  Q29983
NIH Common Fund Data Resources
PHAROS  Q29983
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
2 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 
  • Space Group: F 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 261.5α = 90
b = 261.5β = 90
c = 261.5γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CCP4model building
X-PLORrefinement
CCP4phasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-07-09
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary