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Journal Article
Research Support, Non-U.S. Gov't
Genetic variants in SIRT3 transcriptional regulatory region affect promoter activity and fat deposition in three cattle breeds.
Molecular and Cellular Probes 2017 April
Sirtuin 3 (SIRT3) is a mitochondrial nicotinamide adenine dinucleotide (NAD)-dependent deacetylase. It has crucial roles in regulating the respiratory chain, in adenosine triphosphate (ATP) production, and in both the citric acid and urea cycles. The aim of this study was to investigate whether SIRT3 could be used as a candidate gene in the breeding of cattle. Expression analysis by quantitative real-time polymerase chain reactions (qPCR) indicated that expression levels of SIRT3 were highest in the kidney, rumen, liver, omasum and muscle. Using sequencing technology on a total of 913 cattle representing three indigenous Chinese beef cattle breeds, three single nucleotide polymorphisms (SNPs) were identified in the promoter region of SIRT3, and five haplotypes representing five potential transcription factor compositions of polymorphic potential cis-acting elements. Association analysis indicated that the Hap3/8 diplotype performed better than other combinations in intramuscular fat content. In addition, the promoter activity with Hap1 haplotype was higher than the Hap8 haplotype, consistent with the association analysis. The results indicate that the polymorphisms in transcription factor binding sites of SIRT3 promoter may affect the transcriptional activity of SIRT3, and thus alter intramuscular fat content in beef cattle.
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