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- Title
Genotype of bovine sterol regulatory element binding protein-1 (SREBP-1) is associated with fatty acid composition in Japanese Black cattle.
- Authors
Hoashi, Shogo; Ashida, Nobuhisa; Ohsaki, Hideki; Utsugi, Takeshi; Sasazaki, Shinji; Taniguchi, Masaaki; Oyama, Kenji; Mukai, Fumio; Mannen, Hideyuki
- Abstract
To investigate genetic factors that affect fatty acid composition in beef carcass, we previously investigated genetic profiles of stearoyl-CoA desaturase (SCD) and their effect on fatty acid composition in fat tissue of cattle. It has been known that sterol regulatory element binding protein (SREBP) is a transcription factor that regulates gene expression levels of SCD and other genes relevant to lipid and fatty acid metabolism in tissue. Therefore, we determined the full-length sequence of bovine SREBP-1 cDNA and then surveyed polymorphisms in whole exons and introns in the bovine genome. Large 84-bp insertion (long type: L) and deletion (short type: S) were found in intron 5 of bovine SREBP-1 in Japanese Black cattle, although there was no notable mutation in exon regions. The associations between the SREBP-1 genotypes and fatty acid compositions/fat melting points were analyzed by using genomic DNA with carcass trait information from 606 Japanese Black cattle. The S type contributed to 1.3% higher monounsaturated fatty acid (MUFA) proportion and 1.6°C lower melting point in intramuscular fat. Genotyping of bovine SREBP-1 is considered to reflect a genetic variation which is associated with physiologic characteristics of fat tissue in Japanese black cattle.
- Subjects
ANIMAL genome mapping; CATTLE breeds; CARRIER proteins; STEROLS; FATTY acids; GENE expression; GENETIC polymorphisms; ANIMAL genetics
- Publication
Mammalian Genome, 2007, Vol 18, Issue 12, p880
- ISSN
0938-8990
- Publication type
Article
- DOI
10.1007/s00335-007-9072-y