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Article: Feeding Status Regulates the Polyubiquitination Step of the Ubiquitin-Proteasome-Dependent Proteolysis in Rainbow Trout (Oncorhynchus mykiss) Muscle1
- Article from:
- The Journal of Nutrition
- Article date:
- March 1, 2008
- Author:
CopyrightCopyright American Institute of Nutrition Mar 2008. Provided by ProQuest LLC. (Hide copyright information)
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Abstract
In mammals, the ubiquitin-proteasome proteolytic pathway is a major route of protein degradation and has been shown to be regulated by the feeding status via the protein kinase B (PKB)-Forkehead box-O transcription factor signaling pathway-mediated transcription regulation of atrophy-related ubiquitin ligases, atrogin1 and muscle RING finger 1. In contrast, in rainbow trout (Oncorhynchus mykiss), the activity of the proteasome in muscle was not affected during starvation-induced muscle degradation. The aim of this study was therefore to explore the molecular basis for this lack of induction of this proteolytic route during starvation. In this study, rainbow trout were food deprived ...