›› 2018, Vol. 45 ›› Issue (7): 1750-1758.doi: 10.16431/j.cnki.1671-7236.2018.07.003

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Bioinformatics Analysis of Structure and Function of PON1 Gene in Longdong Cattle

ZHANG Juan1, MU Tong1, ZHAO Ping2, FENG Xiaofang1, WU Jianping3, GU Yaling1   

  1. 1. College of Agriculture, Ningxia University, Yinchuan 750021, China;
    2. Animal Husbandry and Technology Promotion Service Center of Pengyang County, Guyuan 756500, China;
    3. Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
  • Received:2017-12-05 Online:2018-07-20 Published:2018-07-20

Abstract:

In order to clarify the structure and function of paraoxonase 1 (PON1) gene,all exon sequences of PON1 gene in Longdong cattle were amplified by PCR method,the complete sequence was assembled by Seqman software,and the base composition,open reading frame,physical and chemical properties of coding protein,atomic composition,number of amino acid residues,hydrophilicity and hydrophobicity,molecular weight,isoelectric point,secondary structure,higher structure,etc were predicted and analyzed by bioinformatics method.The results showed that the CDS sequence of PON1 gene in Longdong cattle was 1 068 bp,encoding 355 amino acids,Leu was the most abundant,Cys and Trp were the least.The content of A+T (56.55%) was higher than that of G+C (43.26%) in base composition.Compared with the published sequence (GenBank accession No.:EU289337) of cattle,we found that there were mutations which were a synonymous mutation in exons 4,6,8 and 9,but none of them changed amino acids.PON1 protein was a stable water-soluble protein,the atomic composition was C1810H2796N454O533S12,the molecular mass was 39.83 ku,and the theoretical isoelectric point was 5.24.The number of amino acids of random coil,extended strand,α-helix and β-turn in the secondary structure of PON1 protein was 159,116,55 and 25,respectively,eventually formed a hybrid model with random coil and extended strand.Hydrophobic results of PON1 protein showed that the 8th Thr had the strongest hydrophobicity (the highest score:2.878) and the 299th Pro at the highest hydrophilicity (the lowest score:-2.222).The results of this study would lay a foundation for further study on the function of PON1 protein in Longdong cattle and explore the effect of PON1 gene mutation on the carcass and meat quality traits of local cattle in Gansu province.

Key words: Longdong cattle; PON1 gene; bioinformatics; mutation

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