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|Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B)
|Carnitine palmitoyltransferase 1
Peroxisome proliferator-activated receptors
Sparus aurata (Gilthead sea bream)
Fishe Feeding and feeds
|Boukouvala E, Leaver M, Favre-Krey L, Theodoridou M & Krey G (2010) Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B). Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology, 157 (2), pp. 189-197. http://www.sciencedirect.com/science/journal/10964959; https://doi.org/10.1016/j.cbpb.2010.06.004
|Understanding the control of piscine fatty acid metabolism is important for determining the nutritional requirements of fish, and hence for the production of optimal aquaculture diets. The regulation and expression of carnitine palmitoyltransferase 1 (CPT1; EC No 184.108.40.206) are critical processes in the control fatty acid metabolism, and here we report a cDNA from gilthead sea bream (Sparus aurata) which encodes a protein with high identity to vertebrate CPT1. This sea bream CPT1 mRNA is predominantly expressed in skeletal and cardiac muscle, with little expression in other tissues. Phylogenetic analysis of other vertebrate CPT1 sequences show that fish genomes contain a single gene related to mammalian CPT1B, and a further two multi-gene families related to mammalian CPT1A. Genes related to mammalian CPT1C are absent in fish. Therefore, based on both functional and evolutionary orthology to mammalian CPT1B, the sea bream CPT1 reported here is a CPT1B isoform. Sea bream CPT1B mRNA expression progressively decreases in heart and muscle up to 12 hours after last feeding, but returns to initial, non-fasted levels after 72 hours. In contrast, in liver non-fasted expression is low, but strongly increases at 24 and 72 hours after last feeding. In white muscle and liver, CPT1B mRNA expression is highly correlated with the expression of peroxisomal proliferator-activated receptor ı (PPARı).Thus fatty acid metabolism by CPT1B and its control by PPARs is similar in fish and mammals, but multiple genes for CPT1A-like proteins in fish also suggest different and more complex pathways of lipid utilisation than in mammals.
|Published in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology by Elsevier. Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, Volume 157, Issue 2, October 2010, pp. 189 - 197.; This is the peer reviewed version of this article.; NOTICE: this is the author’s version of a work that was accepted for publication in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, VOL 157, ISSUE 2, (October 2010). DOI 10.1016/j.cbpb.2010.06.004.
|Fulltext - Accepted Version
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