6FR4

003 TCR Study of CDR Loop Flexibility


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

In Silicoand Structural Analyses Demonstrate That Intrinsic Protein Motions Guide T Cell Receptor Complementarity Determining Region Loop Flexibility.

Holland, C.J.MacLachlan, B.J.Bianchi, V.Hesketh, S.J.Morgan, R.Vickery, O.Bulek, A.M.Fuller, A.Godkin, A.Sewell, A.K.Rizkallah, P.J.Wells, S.Cole, D.K.

(2018) Front Immunol 9: 674-674

  • DOI: 10.3389/fimmu.2018.00674
  • Primary Citation of Related Structures:  
    6FRA, 6FR3, 6FR5, 6FR4, 6FR7, 6FR6, 6FR9, 6FR8, 6FRC, 6FRB, 6FUN, 6FUM, 6FUP, 6FUO, 6FUR, 6FUQ, 6EH9, 6EH4, 6EH6, 6EH5, 6EH8, 6EH7

  • PubMed Abstract: 
  • T-cell immunity is controlled by T cell receptor (TCR) binding to peptide major histocompatibility complexes (pMHCs). The nature of the interaction between these two proteins has been the subject of many investigations because of its central role in immunity against pathogens, cancer, in autoimmunity, and during organ transplant rejection ...

    T-cell immunity is controlled by T cell receptor (TCR) binding to peptide major histocompatibility complexes (pMHCs). The nature of the interaction between these two proteins has been the subject of many investigations because of its central role in immunity against pathogens, cancer, in autoimmunity, and during organ transplant rejection. Crystal structures comparing unbound and pMHC-bound TCRs have revealed flexibility at the interaction interface, particularly from the perspective of the TCR. However, crystal structures represent only a snapshot of protein conformation that could be influenced through biologically irrelevant crystal lattice contacts and other factors. Here, we solved the structures of three unbound TCRs from multiple crystals. Superposition of identical TCR structures from different crystals revealed some conformation differences of up to 5 Å in individual complementarity determining region (CDR) loops that are similar to those that have previously been attributed to antigen engagement. We then used a combination of rigidity analysis and simulations of protein motion to reveal the theoretical potential of TCR CDR loop flexibility in unbound state. These simulations of protein motion support the notion that crystal structures may only offer an artifactual indication of TCR flexibility, influenced by crystallization conditions and crystal packing that is inconsistent with the theoretical potential of intrinsic TCR motions.


    Related Citations: 
    • Flexibility Study of CDRs in 003 TCR
      Rizkallah, P.J., Cole, D.K.
      () To be published --: --

    Organizational Affiliation

    Immunocore, Abingdon, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TCR 003 alpha chainA202Homo sapiensMutation(s): 0 
Gene Names: TRA@
UniProt
Find proteins for Q6NSA1 (Homo sapiens)
Explore Q6NSA1 
Go to UniProtKB:  Q6NSA1
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TCR 003 Beta ChainB244Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A], D [auth A], E [auth A], O [auth B], P [auth B], Q [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
F [auth A] , G [auth A] , H [auth A] , I [auth A] , J [auth A] , K [auth A] , L [auth A] , M [auth A] , 
F [auth A],  G [auth A],  H [auth A],  I [auth A],  J [auth A],  K [auth A],  L [auth A],  M [auth A],  R [auth B],  S [auth B],  T [auth B],  U [auth B],  V [auth B],  W [auth B],  X [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
N [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.28α = 90
b = 81.29β = 90.3
c = 65.09γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
xia2data reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-18
    Type: Initial release
  • Version 1.1: 2018-05-09
    Changes: Data collection, Database references, Derived calculations, Structure summary