期刊
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
卷 159, 期 1, 页码 75-81出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cbpa.2011.01.020
关键词
Mitochondria; Oxidative phosphorylation; Coupling efficiency; Proton leak; avUCP
资金
- Ministry of Education, Science and Culture of Japan
- Japan Society for the Promotion of Science
- Tohoku University Institute for International Advanced Research and Education
- Grants-in-Aid for Scientific Research [22790841] Funding Source: KAKEN
Meat-type chickens show high feed efficiency and have a very rapid growth rate compared with laying-type chickens. To clarify whether the type-specific difference in feed conversion efficiency is involved in mitochondrial bioenergetics, modular kinetic analysis was applied to oxidative phosphorylation in skeletal muscle mitochondria of both type chickens. Mitochondria from skeletal muscle of meat-type chickens showed greater substrate oxidation and phosphorylating activities, and less proton leak than those of the laying-type, resulting in a higher efficiency of oxidative phosphorylation. Gene expression and protein content of uncoupling protein (avUCP) but not adenine nucleotide translocase (avANT) gene expression were lower in skeletal muscle mitochondria of meat-type chickens than the laying-type. The current results regarding a higher efficiency of oxidative phosphorylation and UCP content may partially support the high feed efficiency of meat-type chickens. (C) 2011 Elsevier Inc. All rights reserved.
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