2AK4

Crystal Structure of SB27 TCR in complex with HLA-B*3508-13mer peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.246 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

T cell receptor recognition of a 'super-bulged' major histocompatibility complex class I-bound peptide

Tynan, F.E.Burrows, S.R.Buckle, A.M.Clements, C.S.Borg, N.A.Miles, J.J.Beddoe, T.Whisstock, J.C.Wilce, M.C.Silins, S.L.Burrows, J.M.Kjer-Nielsen, L.Kostenko, L.Purcell, A.W.McCluskey, J.Rossjohn, J.

(2005) Nat.Immunol. 6: 1114-1122

  • DOI: 10.1038/ni1257

  • PubMed Abstract: 
  • Unusually long major histocompatibility complex (MHC) class I-restricted epitopes are important in immunity, but their 'bulged' conformation represents a potential obstacle to alphabeta T cell receptor (TCR)-MHC class I docking. To elucidate how such ...

    Unusually long major histocompatibility complex (MHC) class I-restricted epitopes are important in immunity, but their 'bulged' conformation represents a potential obstacle to alphabeta T cell receptor (TCR)-MHC class I docking. To elucidate how such recognition is achieved while still preserving MHC restriction, we have determined here the structure of a TCR in complex with HLA-B(*)3508 presenting a peptide 13 amino acids in length. This complex was atypical of TCR-peptide-MHC class I interactions, being dominated at the interface by peptide-mediated interactions. The TCR assumed two distinct orientations, swiveling on top of the centrally bulged, rigid peptide such that only limited contacts were made with MHC class I. Although the TCR-peptide recognition resembled an antibody-antigen interaction, the TCR-MHC class I contacts defined a minimal 'generic footprint' of MHC-restriction. Thus our findings simultaneously demonstrate the considerable adaptability of the TCR and the 'shape' of MHC restriction.


    Organizational Affiliation

    The Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA-B35 variant
A, F, K, Q
276Homo sapiensMutation(s): 0 
Gene Names: HLA-B (HLAB)
Find proteins for P30685 (Homo sapiens)
Go to Gene View: HLA-B
Go to UniProtKB:  P30685
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, G, L, R
99Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
EBV peptide LPEPLPQGQLTAY
C, H, M, S
13Epstein-Barr virus (strain B95-8)Mutation(s): 0 
Find proteins for P03206 (Epstein-Barr virus (strain B95-8))
Go to UniProtKB:  P03206
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
SB27 T cell receptor alpha chain
D, I, N, T
211Homo sapiensMutation(s): 0 
Gene Names: TRAC (TCRA)
Find proteins for P01848 (Homo sapiens)
Go to UniProtKB:  P01848
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
SB27 T cell receptor beta chain
E, J, P, U
245Homo sapiensMutation(s): 0 
Gene Names: TRBC1
Find proteins for P01850 (Homo sapiens)
Go to UniProtKB:  P01850
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, J, K, L, Q, R, S
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.246 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 79.154α = 90.00
b = 213.282β = 89.94
c = 122.303γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PDB_EXTRACTdata extraction
REFMACrefinement
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2005-10-11
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance