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Integrin-dependent translocation of LASP-1 to the cytoskeleton of activated platelets correlates with LASP-1 phosphorylation at tyrosine 171 by Src-kinase

Integrin-dependent translocation of LASP-1 to the cytoskeleton of activated platelets correlates with LASP-1 phosphorylation at tyrosine 171 by Src-kinase

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TRAENKA, Julia, Christof R. HAUCK, Urs LEWANDROWSKI, Albert SICKMANN, Stepan GAMBARYAN, Petra THALHEIMER, Elke BUTT, 2009. Integrin-dependent translocation of LASP-1 to the cytoskeleton of activated platelets correlates with LASP-1 phosphorylation at tyrosine 171 by Src-kinase. In: Thrombosis and Haemostasis. 102(3), pp. 520-528. ISSN 0340-6245. Available under: doi: 10.1160/TH09-03-0143

@article{Traenka2009Integ-1123, title={Integrin-dependent translocation of LASP-1 to the cytoskeleton of activated platelets correlates with LASP-1 phosphorylation at tyrosine 171 by Src-kinase}, year={2009}, doi={10.1160/TH09-03-0143}, number={3}, volume={102}, issn={0340-6245}, journal={Thrombosis and Haemostasis}, pages={520--528}, author={Traenka, Julia and Hauck, Christof R. and Lewandrowski, Urs and Sickmann, Albert and Gambaryan, Stepan and Thalheimer, Petra and Butt, Elke} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/1123"> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Integrin-dependent translocation of LASP-1 to the cytoskeleton of activated platelets correlates with LASP-1 phosphorylation at tyrosine 171 by Src-kinase</dcterms:title> <dcterms:issued>2009</dcterms:issued> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Traenka, Julia</dc:contributor> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/1123"/> <dc:creator>Hauck, Christof R.</dc:creator> <dc:rights>deposit-license</dc:rights> <dc:contributor>Hauck, Christof R.</dc:contributor> <dc:creator>Lewandrowski, Urs</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-23T09:06:19Z</dc:date> <dcterms:abstract xml:lang="eng">During platelet adhesion, the complex cytoskeletal structure is rearranged resulting in the formation of F-actin-based filopodia and lamellipodia. Stimulatory platelet signalling pathways include binding of integrin αIIbβ3 to fibrinogen followed by activation of protein tyrosine kinases (PTK) and phosphorylation of downstream signalling proteins. In this study, we demonstrate that the scaffolding and F-actin binding protein LASP-1 undergoes tyrosine phosphorylation in thrombin-stimulated human platelets. By means of specific inhibitors we identified Src-kinase as the primary enzyme phosphorylating LASP-1 in intact cells. These data were confirmed in platelet model cells (A5-CHO cells), constitutively expressing integrin αIIbβ3. Fibrinogen-mediated cell stimulation resulted in a similar tyrosine phosphorylation of transiently transfected LASP-1. Site directed mutagenesis identified tyrosine 171 as the Src-kinase phosphorylation site. Immunofluorescence microscopic analysis of these cells revealed a relocation of LASP-1 to focal contacts and the leading edge of the membrane upon fibrinogen activation and tyrosine 171 phosphorylation. This translocation was also seen in adherent platelets. Concomitant with adhesion, LASP-1 translocated from the cytosol along the arms of the pseudopodia into the leading lamellae of the spreading platelets, indicating a crucial role of the protein in platelet cytoskeleton rearrangement.</dcterms:abstract> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-23T09:06:19Z</dcterms:available> <dc:language>eng</dc:language> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <dc:contributor>Thalheimer, Petra</dc:contributor> <dc:creator>Gambaryan, Stepan</dc:creator> <dc:creator>Thalheimer, Petra</dc:creator> <dc:contributor>Butt, Elke</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103416863-3868037-7"/> <dcterms:bibliographicCitation>Publ. in: Thrombosis and Haemostasis 102 (2009), 3, pp. 520-528</dcterms:bibliographicCitation> <dc:creator>Sickmann, Albert</dc:creator> <dc:contributor>Gambaryan, Stepan</dc:contributor> <dc:creator>Butt, Elke</dc:creator> <dc:contributor>Sickmann, Albert</dc:contributor> <dc:creator>Traenka, Julia</dc:creator> <dc:contributor>Lewandrowski, Urs</dc:contributor> </rdf:Description> </rdf:RDF>

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