Biomarkers of tenderness and intramuscular fat in five muscles from French PDO Maine-Anjou: I- Muscle type effect
Résumé
This paper describes the difference in the relative abundance of 20 proteins in five muscles: Longissimus thoracis (LT), Rectus abdominis (RA), Semimembranosus (SM), Semitendinosus (ST) and Triceps brachii (TB) of cattle from the French Maine Anjou Protected Designation of Origin (PDO). These proteins are biomarkers of tenderness and intramuscular fat previously identified by proteomic analysis. The relative abundance of the proteins was evaluated by Reverse Phase Protein Array (RPPA) with specific antibodies. The main results showed a muscle effect on 16 of 20 biomarkers. The RA muscle was significantly different from other muscles by the lower abundance of 6 proteins and the higher abundance of 5 proteins. In the ST muscle, 4 proteins were less abundant and 4 others corresponding to fast glycolytic type, were more abundant. Clustering analysis revealed associations between proteins irrespective of muscle type and others were muscle dependent. The knowledge of these associations are important to understand the mechanism involved in these meat properties.
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