ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (9): 1371-1379.doi: 10.11843/j.issn.0366-6964.2013.09.006

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Study on the Cloning and Ontogenetic mRNA Expression of Ovine LPIN1 Gene

WEI Lin-lin1, GAO Jin-sheng2, WANG Jing-lin1, CHENG Li-fen2, QIAO Li-ying1, JIA Xia-li1, ZHANG Jing1, YANG Kai-jie1, LIU Jian-hua1, LIANG Chen1, LIU Wen-zhong1*   

  1. (1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China; 2. Shanxi Provincial Working Station for Animal and Poultry Breeding, Taiyuan 030001, China)
  • Received:2013-05-08 Online:2013-09-23 Published:2013-09-23

Abstract:

This study aimed to clone ovine LPIN1 gene and to analyze its ontogenetic mRNA expression in seven adipose tissues of two breeds with distinct tail types, and based on which, to reveal the role of the gene in fat metabolism of sheep. RT-PCR technique was used to amplify LPIN1 gene. Bioinformatics methods were used to predict the physicochemical properties and domains in Lipin1 protein. Ninety six animals from Guangling Large Tailed and Small Tailed Han (48 for each breed with equal sex ratios) were slaughtered at 2, 4, 6, 8, 10 and 12 months of age, respectively. Adipose tissues were collected from great and small omental, mesenteric, retroperitoneal, subcutaneous, perirenal and tail fats to study the ontogenetic mRNA expression by real-time PCR. The results showed that the coding region was 2 688 bp in length, coding 895 amino acids. Lipin1 was a kind of unstable and hydrophilic protein with 10 potential glycosylation and 88 phosphorylation sites, but without transmembrane domain and signal peptide. N-and C-terminals contained two highly conserved regions(Lipin-N and LNS2 (Lipin/Ned1/Smp2)).  LPIN1 mRNA expressed in all adipose tissues studied, but the highest in perirenal fat and the lowest in mesenteric fats. Months of age, tissue and breed as well as their twoway interactions had significant influences on the LPIN1 mRNA expression. LPIN1 gene is significant in the genetic improvement of meat quality traits of sheep based on its direct participating in and indirect regulating fat metabolism.

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