Structural Basis for Differential Recognition of Tyrosine Phosphorylated Sites in the Linker for Activation of T cells (LAT) by the Adaptor Protein Gads

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

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Structural basis for differential recognition of tyrosine-phosphorylated sites in the linker for activation of T cells (LAT) by the adaptor Gads.

Cho, S.Velikovsky, C.A.Swaminathan, C.P.Houtman, J.C.Samelson, L.E.Mariuzza, R.A.

(2004) EMBO J 23: 1441-1451

  • DOI: https://doi.org/10.1038/sj.emboj.7600168
  • Primary Citation of Related Structures:  
    1R1P, 1R1Q, 1R1S

  • PubMed Abstract: 

    The transmembrane protein, linker for activation of T cells (LAT), is essential for T-cell activation and development. Phosphorylation of LAT at multiple tyrosines creates binding sites for the adaptors Gads and Grb2, leading to nucleation of multiprotein signaling complexes. Human LAT contains five potential binding sites for Gads, of which only those at Tyr171 and Tyr191 appear necessary for T-cell function. We asked whether Gads binds preferentially to these sites, as differential recognition could assist in assembling defined LAT-based complexes. Measured calorimetrically, Gads-SH2 binds LAT tyrosine phosphorylation sites 171 and 191 with higher affinities than the other sites, with the differences ranging from only several fold weaker binding to no detectable interaction. Crystal structures of Gads-SH2 complexed with phosphopeptides representing sites 171, 191 and 226 were determined to 1.8-1.9 A resolutions. The structures reveal the basis for preferential recognition of specific LAT sites by Gads, as well as for the relatively greater promiscuity of the related adaptor Grb2, whose binding also requires asparagine at position +2 C-terminal to the phosphorylated tyrosine.

  • Organizational Affiliation

    Center for Advanced Research in Biotechnology, WM Keck Laboratory for Structural Biology, University of Maryland Biotechnology Institute, Rockville, MD, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GRB2-related adaptor protein 2
A, B, C, D
100Mus musculusMutation(s): 0 
Gene Names: GADS
Find proteins for O89100 (Mus musculus)
Explore O89100 
Go to UniProtKB:  O89100
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO89100
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
LAT pY171 peptide
E, F, G, H
7N/AMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.307α = 90
b = 90.307β = 90
c = 145.959γ = 90
Software Package:
Software NamePurpose
CrystalCleardata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection
  • Version 1.4: 2020-01-22
    Changes: Database references, Derived calculations