3TF7

42F3 QL9/H2-Ld complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

T cell receptor signaling is limited by docking geometry to peptide-major histocompatibility complex.

Adams, J.J.Narayanan, S.Liu, B.Birnbaum, M.E.Kruse, A.C.Bowerman, N.A.Chen, W.Levin, A.M.Connolly, J.M.Zhu, C.Kranz, D.M.Garcia, K.C.

(2011) Immunity 35: 681-693

  • DOI: https://doi.org/10.1016/j.immuni.2011.09.013
  • Primary Citation of Related Structures:  
    3TF7, 3TFK, 3TJH, 3TPU

  • PubMed Abstract: 

    T cell receptor (TCR) engagement of peptide-major histocompatibility complex (pMHC) is essential to adaptive immunity, but it is unknown whether TCR signaling responses are influenced by the binding topology of the TCR-peptide-MHC complex. We developed yeast-displayed pMHC libraries that enabled us to identify new peptide sequences reactive with a single TCR. Structural analysis showed that four peptides bound to the TCR with distinct 3D and 2D affinities using entirely different binding chemistries. Three of the peptides that shared a common docking mode, where key TCR-MHC germline interactions are preserved, induced TCR signaling. The fourth peptide failed to induce signaling and was recognized in a substantially different TCR-MHC binding mode that apparently exceeded geometric tolerances compatible with signaling. We suggest that the stereotypical TCR-MHC docking paradigm evolved from productive signaling geometries and that TCR signaling can be modulated by peptides that are recognized in alternative TCR-pMHC binding orientations.


  • Organizational Affiliation

    Howard Hughes Medical Institute, and Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H2-Ld SBM2A [auth E],
D [auth A]
180Mus musculusMutation(s): 0 
UniProt
Find proteins for P01897 (Mus musculus)
Explore P01897 
Go to UniProtKB:  P01897
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UniProt GroupP01897
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
QL9 peptide (QLSPFPFDL)B [auth F],
E [auth B]
9Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q60597 (Mus musculus)
Explore Q60597 
Go to UniProtKB:  Q60597
IMPC:  MGI:1098267
Entity Groups  
UniProt GroupQ60597
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
42F3 Mut7 scFv (42F3 alpha chain, linker, 42F3 beta chain)C,
F [auth G],
G [auth I],
H [auth K]
256Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.487α = 90
b = 109.793β = 90
c = 213.59γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-12-07
    Type: Initial release
  • Version 1.1: 2012-01-18
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description