2IKQ

Crystal structure of mouse Sts-1 PGM domain in complex with phosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.609 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.248 

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
  • Primary Citation of Related Structures:  2H0Q

  • 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 1
A, B, M
270Mus musculusGene Names: Ubash3b (Sts1)
EC: 3.1.3.48
Find proteins for Q8BGG7 (Mus musculus)
Go to UniProtKB:  Q8BGG7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B, M
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.609 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.248 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 116.960α = 90.00
b = 74.671β = 100.79
c = 101.279γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
CCP4model building
CCP4phasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-10-02 
  • Released Date: 2007-08-14 
  • Deposition Author(s): Chen, Y., Nassar, N.

Revision History 

  • Version 1.0: 2007-08-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance