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Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls
Published on: July 12, 2024
Proteomics of muscle-specific beef color stability
Poulson Joseph1, Surendranath P Suman, Gregg Rentfrow
1Department of Animal and Food Sciences, University of Kentucky, Lexington, Kentucky 40546, USA.
Journal of Agricultural and Food Chemistry
|February 29, 2012
Summary
Beef muscle color stability differs due to protein variations. Color-stable Longissimus lumborum (LL) had more antioxidant proteins and chaperones than color-labile Psoas major (PM) muscle. This suggests muscle-specific strategies for better beef color.
Area of Science:
- Meat science
- Proteomics
- Biochemistry
Background:
- Beef color is a critical quality attribute influencing consumer choice.
- Color stability varies significantly between different beef muscles.
- Understanding the molecular basis of color stability is essential for improving beef quality.
Purpose of the Study:
- To differentiate the sarcoplasmic proteome of color-stable Longissimus lumborum (LL) and color-labile Psoas major (PM) beef muscles.
- To identify proteins associated with color stability and lipid oxidation in beef.
- To elucidate the role of specific proteins in maintaining beef color.
Main Methods:
- Beef steaks from LL and PM muscles were subjected to 9 days of refrigerated retail display.
- Color stability and lipid oxidation were assessed.
- Proteomic analysis was performed to identify differentially abundant proteins.
Main Results:
- LL steaks exhibited superior color stability and reduced lipid oxidation compared to PM steaks.
- Proteomic analysis revealed 16 differentially abundant proteins, including antioxidant proteins and chaperones.
- Proteins like peroxiredoxin-2 and heat shock protein-27 kDa were abundant in LL and correlated with color stability.
Conclusions:
- The enhanced color stability of LL muscle is linked to the overabundance of antioxidant proteins and chaperones.
- Specific proteins correlate positively with redness and color stability, while others correlate negatively.
- Muscle-specific processing strategies may be necessary to improve overall beef color quality.
