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2ikq
From Proteopedia
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Crystal structure of mouse Sts-1 PGM domain in complex with phosphate
Overview
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.
About this Structure
2IKQ is a Single protein structure of sequence from Mus musculus with as ligand. Full crystallographic information is available from OCA.
Reference
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, Mol Cell. 2007 Aug 3;27(3):486-97. PMID:17679096
Page seeded by OCA on Wed Jan 23 14:12:12 2008
