| Literature DB >> 20585042 |
Dafydd H Thomas1, Todd M Getz, Tiffanny N Newman, Carol A Dangelmaier, Nick Carpino, Satya P Kunapuli, Alexander Y Tsygankov, James L Daniel.
Abstract
T-cell ubiquitin ligand-2 (TULA-2) is a recently discovered histidine tyrosine phosphatase thought to be ubiquitously expressed. In this work, we have investigated whether TULA-2 has a key role in platelet glycoprotein VI (GPVI) signaling. This study indicates that TULA-2 is expressed in human and murine platelets and is able to associate with Syk and dephosphorylate it. Ablation of TULA-2 resulted in hyperphosphorylation of Syk and its downstream effector phospholipase C-γ2 as well as enhanced GPVI-mediated platelet functional responses. In addition, shorter bleeding times and a prothrombotic phenotype were observed in mice lacking TULA-2. We therefore propose that TULA-2 is the primary tyrosine phosphatase mediating the dephosphorylation of Syk and thus functions as a negative regulator of GPVI signaling in platelets.Entities:
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Year: 2010 PMID: 20585042 PMCID: PMC2953889 DOI: 10.1182/blood-2010-02-268136
Source DB: PubMed Journal: Blood ISSN: 0006-4971 Impact factor: 22.113