3QIU

Crystal structure of the 226 TCR in complex with MCC/I-Ek


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

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This is version 1.4 of the entry. See complete history


Literature

Structural basis of specificity and cross-reactivity in T cell receptors specific for cytochrome c-I-E(k).

Newell, E.W.Ely, L.K.Kruse, A.C.Reay, P.A.Rodriguez, S.N.Lin, A.E.Kuhns, M.S.Garcia, K.C.Davis, M.M.

(2011) J Immunol 186: 5823-5832

  • DOI: https://doi.org/10.4049/jimmunol.1100197
  • Primary Citation of Related Structures:  
    3QIB, 3QIU, 3QIW, 3QJF, 3QJH

  • PubMed Abstract: 

    T cells specific for the cytochrome c Ag are widely used to investigate many aspects of TCR specificity and interactions with peptide-MHC, but structural information has long been elusive. In this study, we present structures for the well-studied 2B4 TCR, as well as a naturally occurring variant of the 5c.c7 TCR, 226, which is cross-reactive with more than half of possible substitutions at all three TCR-sensitive residues on the peptide Ag. These structures alone and in complex with peptide-MHC ligands allow us to reassess many prior mutagenesis results. In addition, the structure of 226 bound to one peptide variant, p5E, shows major changes in the CDR3 contacts compared with wild-type, yet the TCR V-region contacts with MHC are conserved. These and other data illustrate the ability of TCRs to accommodate large variations in CDR3 structure and peptide contacts within the constraints of highly conserved TCR-MHC interactions.


  • Organizational Affiliation

    Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN, E-K alpha chain179Mus musculusMutation(s): 0 
UniProt
Find proteins for P04224 (Mus musculus)
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Go to UniProtKB:  P04224
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UniProt GroupP04224
Glycosylation
Glycosylation Sites: 1Go to GlyGen: P04224-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MHC CLASS II H2-IA-BETA CHAIN196Mus musculusMutation(s): 0 
Gene Names: H2-Eb1
UniProt & NIH Common Fund Data Resources
Find proteins for P04230 (Mus musculus)
Explore P04230 
Go to UniProtKB:  P04230
IMPC:  MGI:95901
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UniProt GroupP04230
Glycosylation
Glycosylation Sites: 1Go to GlyGen: P04230-1
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
TCR 226 alpha chain205Mus musculusMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
TCR 226 beta chain243Mus musculusMutation(s): 0 
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  • Reference Sequence

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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
MCC peptide13Manduca sextaMutation(s): 0 
UniProt
Find proteins for P00039 (Manduca sexta)
Explore P00039 
Go to UniProtKB:  P00039
Entity Groups  
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UniProt GroupP00039
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.79α = 90
b = 71.4β = 90.75
c = 106.07γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-08-10
    Changes: Database references
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary
  • Version 1.4: 2024-11-27
    Changes: Data collection, Database references, Structure summary