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Extensive analysis of the human platelet proteome by two‐dimensional gel electrophoresis and mass spectrometry
Author(s) -
García Angel,
Prabhakar Sripadi,
Brock Chris J.,
Pearce Andrew C.,
Dwek Raymond A.,
Watson Steve P.,
Hebestreit Holger F.,
Zitzmann Nicole
Publication year - 2004
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.200300665
Subject(s) - proteome , platelet , proteomics , two dimensional gel electrophoresis , gel electrophoresis , mass spectrometry , biology , platelet activation , tandem mass spectrometry , computational biology , microbiology and biotechnology , chemistry , biochemistry , bioinformatics , gene , immunology , chromatography
Platelets play a key role in the control of bleeding and wound healing, contributing to the formation of vascular plugs. Under pathologic circumstances, they are involved in thrombotic disorders, including heart disease. Since platelets do not have a nucleus, proteomics offers a powerful alternative approach to provide data on protein expression in these cells, helping to address their biology. In this publication we extend the previously reported analysis of the p I 4–5 region of the human platelet proteome to the p I 5–11 region. By using narrow p I range two‐dimensional electrophoresis (2‐DE) for protein separation followed by high‐throughput tandem mass spectrometry (MS/MS) for protein identification, we were able to identify 760 protein features, corresponding to 311 different genes, resulting in the annotation of 54% of the p I 5–11 range 2‐DE proteome map. We evaluated the physicochemical properties and functions of the identified platelet proteome. Importantly, the main group of proteins identified is involved in intracellular signalling and regulation of the cytoskeleton. In addition, 11 hypothetical proteins are reported. In conclusion, this study provides a unique inventory of the platelet proteome, contributing to our understanding of platelet function and building the basis for the identification of new drug targets.