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 

wwPDB Validation 3D Report Full Report


This is version 1.3 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: 10.4049/jimmunol.1100197
  • Structures With Same Primary Citation

  • 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 ...

    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 LengthOrganismDetails
H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN, E-K alpha chainA179Mus musculusMutation(s): 0 
Find proteins for P04224 (Mus musculus)
Explore P04224 
Go to UniProtKB:  P04224
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MHC CLASS II H2-IA-BETA CHAINB196Mus musculusMutation(s): 0 
Gene Names: H2-Eb1
Find proteins for P04230 (Mus musculus)
Explore P04230 
Go to UniProtKB:  P04230
NIH Common Fund Data Resources
IMPC  MGI:95901
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TCR 226 alpha chainC205Mus musculusMutation(s): 0 
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
TCR 226 beta chainD243Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
MCC peptideE13Manduca sextaMutation(s): 0 
Find proteins for P00039 (Manduca sexta)
Explore P00039 
Go to UniProtKB:  P00039
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download CCD File 
A, 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 

  • 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