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Analysis of the Molecular Characteristics of Chinese Yakow Major Histocompatibility Complex DRA Gene(MHC-ClassⅡ-DRA)

PU Lan-ping1, XI Dong-mei1, FAN Yue-yuan1, SU Ba-qi2, CHEN Xue-li3, LI Ji-zhong3, DENG Wei-dong1   

  1. 1. College of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China;
    2. Agriculture Science and Technology Bureau, Gongshan Dulong and Nu Autonomous County, Nujiang Lisu Autonomous Prefecture of Yunan Province, Gongshan 673500, China;
    3. Diqing Science and Animal Husbandry Bureay, Shangerila 674400, China
  • Received:2012-01-13 Online:2012-09-20 Published:2012-09-18

Abstract: To explore the resistance traits of Chinese Yakow, in the present study, the Yakow coding region sequence of the DRA gene had been amplified by one pair primer and deposited into the GenBank database under accession JQ347519. According to the ORF FINDER from NCBI and other bioinformatics tools, the length of the coding region was 762 bp which encoded 253 amino acids. Moreover, the characteristics of hydrophobicity, signal peptide, N-linked glycosylation and the secondary structure were predicted. Analysis the homology with other species and compared with cattle, Yakow DRA (bogr×bola-DRA) sequence showed highest similarity (99.0%). Unlike other MHC molecules, the DRA gene showed highly conserved characteristics across all animals especially ruminants in functional positions, such as antigen binding at peptide binding site (PBS), N-linked glycosylation, α1 and α2 domains.

Key words: Chinese Yakow; MHC; DRA; resistance

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