1B3J

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

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


  • 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.,Sect.D 54: 451


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MHC CLASS I HOMOLOG MIC-A
A
274Homo sapiensGene Names: MICA (PERB11.1)
Find proteins for Q29983 (Homo sapiens)
Go to Gene View: MICA
Go to UniProtKB:  Q29983
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.246 
  • Space Group: F 41 3 2
Unit Cell:
Length (Å)Angle (°)
a = 261.500α = 90.00
b = 261.500β = 90.00
c = 261.500γ = 90.00
Software Package:
Software NamePurpose
CCP4phasing
CCP4model building
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-07-09
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model