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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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: 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN, E-K alpha chainA179Mus musculusMutation(s): 0 
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UniProt GroupP04224
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MHC CLASS II H2-IA-BETA CHAINB196Mus musculusMutation(s): 0 
Gene Names: H2-Eb1
UniProt & NIH Common Fund Data Resources
Find proteins for P04230 (Mus musculus)
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IMPC:  MGI:95901
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
TCR 226 alpha chainC205Mus musculusMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
TCR 226 beta chainD243Mus musculusMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
MCC peptideE13Manduca sextaMutation(s): 0 
UniProt
Find proteins for P00039 (Manduca sexta)
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UniProt GroupP00039
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Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
F [auth A],
G [auth B]		2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
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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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