Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 93, Issue 7, Pages 1779-1787Publisher
WILEY
DOI: 10.1002/jsfa.5977
Keywords
Mytilus galloprovincialis; food safety; proteomics
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT, Lisbon, Portugal)
- Jose Castillejo
- Ministerio de Ciencia e Innovacion (MICINN, Madrid, Spain)
- FCT [PTDC/MAR/115347/2009]
- Fundação para a Ciência e a Tecnologia [PTDC/MAR/115347/2009] Funding Source: FCT
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Background Shellfish farming is an important economic activity that provides society with a valuable source of food. Analyses of the protein content and metabolism of shellfish are therefore of utmost importance to monitor the presence and effects of environmental contaminants in these organisms and also to assess food quality and authenticity. The aim of the present study was to compare different protein extraction protocols commonly used in two-dimensional gel electrophoresis (2DE) research and select the most suitable for the analysis of gill and digestive gland proteomes from the marine mussel Mytilus galloprovincialis. Results High-resolution protein separation was achieved by direct solubilisation of proteins from M. galloprovincialis tissues with urea (7 mol L1), thiourea (2 mol L1), CHAPS (40 g L1), DTT (65 mmol L1) and ampholytes (pH 47, 8 mL L1). Subsequent protein identification from 2DE gels by MALDI-TOF/TOF mass spectrometry revealed a high number of proteins with functions in cytoskeleton structure, dynamics and maintenance. Other proteins identified in the 2DE gels are involved in energy production and carbohydrate metabolism, metal transport, chaperones and stress response, cell signalling and regulation, proteolysis and protein transduction. Conclusion Important protein markers for contaminant and quality assessment of shellfish food products can be analysed using 2DE.(c) 2012 Society of Chemical Industry
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