Meat-type chickens have a higher efficiency of mitochondrial oxidative phosphorylation than laying-type chickens

Masaaki Toyomizu, Motoi Kikusato, Yusuke Kawabata, Md Abul Kalam Azad, Eriko Inui, Taku Amo

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalComparative Biochemistry and Physiology - A Molecular and Integrative Physiology
Volume159
Issue number1
DOIs
Publication statusPublished - 2011 May

Keywords

  • AvUCP
  • Coupling efficiency
  • Mitochondria
  • Oxidative phosphorylation
  • Proton leak

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Molecular Biology

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