2H0Q

Crystal Structure of the PGM domain of the Suppressor of T-Cell receptor (Sts-1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A phosphatase activity of Sts-1 contributes to the suppression of TCR signaling.

Mikhailik, A.Ford, B.Keller, J.Chen, Y.Nassar, N.Carpino, N.

(2007) Mol Cell 27: 486-497

  • DOI: 10.1016/j.molcel.2007.06.015
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Precise signaling by the T cell receptor (TCR) is crucial for a proper immune response. To ensure that T cells respond appropriately to antigenic stimuli, TCR signaling pathways are subject to multiple levels of regulation. Sts-1 negatively regulates ...

    Precise signaling by the T cell receptor (TCR) is crucial for a proper immune response. To ensure that T cells respond appropriately to antigenic stimuli, TCR signaling pathways are subject to multiple levels of regulation. Sts-1 negatively regulates signaling pathways downstream of the TCR by an unknown mechanism(s). Here, we demonstrate that Sts-1 is a phosphatase that can target the tyrosine kinase Zap-70 among other proteins. The X-ray structure of the Sts-1 C terminus reveals that it has homology to members of the phosphoglycerate mutase/acid phosphatase (PGM/AcP) family of enzymes, with residues known to be important for PGM/AcP catalytic activity conserved in nature and position in Sts-1. Point mutations that impair Sts-1 phosphatase activity in vitro also impair the ability of Sts-1 to regulate TCR signaling in T cells. These observations reveal a PGM/AcP-like enzyme activity involved in the control of antigen receptor signaling.


    Organizational Affiliation

    Department of Molecular Genetics and Microbiology, Room 130, Life Sciences Building, Stony Brook University, Stony Brook, NY 11794-5222, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Suppressor of T-cell receptor signaling 1A, B, C261Mus musculusMutation(s): 0 
Gene Names: STS-1Ubash3bSts1
EC: 3.1.3.48
Find proteins for Q8BGG7 (Mus musculus)
Explore Q8BGG7 
Go to UniProtKB:  Q8BGG7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.229α = 90
b = 74.34β = 101.46
c = 100.106γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
HKL-2000data scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance