Journal
PROTEOMICS
Volume 13, Issue 9, Pages 1528-1544Publisher
WILEY
DOI: 10.1002/pmic.201200145
Keywords
2D DIGE; Animal proteomics; Centrifugal drip; Drip loss; Meat quality; Proteome map
Funding
- Food Institutional Research Measure (FIRM) through the Department of Agriculture, Food and Fisheries in Ireland
- Teagasc Walsh Fellowship scheme
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Variation in water-holding capacity (WHC), which presents a major economic burden to the swine industry, is considered to be underpinned by variation at a molecular and biochemical level. High-resolution 2D DIGE followed by MS analysis and Western blot were used to unravel the proteome of muscle exudate, collected following centrifugation, in the pH 47 range. A first 2DE-based protein map of this substrate was produced where 89 spots were successfully characterised. Two phenotypes divergent for WHC plus one intermediate were compared with a view to deciphering the biochemical processes impacting on variation in WHC. Twenty spots were observed to be altered across the phenotypes. Of these, 14 represented sixteen proteins including metabolic enzymes, stress response proteins and structural proteins. Triosephosphate isomerase and transferrin showed a major difference between the two extreme phenotypes, and may have potential as biological markers for WHC prediction. Several members of the HSPs family were highlighted. This proteomic study makes an important contribution towards a more detailed molecular view of the processes behind WHC and will provide a valuable resource for future investigations.
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