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Modifications of trout (Oncorhynchus mykiss) muscle proteins by preslaughter activity

Abstract : The effect of two different preslaughter procedures (limited or 15-min intense muscular activity) on muscle trout proteins was investigated. Muscle was sampled 45 min and 24 h post-mortem, proteins were separated using two-dimensional electrophoresis, and spots of interest were tentatively identified by MALDI-TOF spectrometry. Twenty-nine and 4 spots were differentially represented between the two groups of fish at 45 min and 24 h post-mortem, respectively. Spots that could be identified corresponded mainly to proteins involved in energy-producing pathways (triosephosphate isomerase, enolase, pyruvate dehydrogenase) or to structural proteins (desmin, cap-Z, myosin heavy chain fragment). Persistent under-representation of desmin, a key cytoskeletal protein, in fish submitted to intense muscular activity suggests that such a preslaughter treatment can have an effect on postmortem muscle integrity.
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Submitted on : Friday, May 29, 2020 - 10:22:46 PM
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Martine Morzel, Christophe Chambon, Florence Lefèvre, Gilles Paboeuf, Elisabeth Laville. Modifications of trout (Oncorhynchus mykiss) muscle proteins by preslaughter activity. Journal of Agricultural and Food Chemistry, American Chemical Society, 2006, 54, pp.2997-3001. ⟨10.1021/jf0528759⟩. ⟨hal-02655423⟩



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