China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (7): 2200-2206.doi: 10.16431/j.cnki.1671-7236.2020.07.025

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Molecular Characteristics,Antigenicity and Phylogenetic Analysis of Oma87 Gene of Pasteurella multocida in Cattle

ZHANG Xingxing1, HUANG Xin1, HE Yanhua1, HE Lixiong2, HAN Mengli1, ZHANG Qian1, WU Tongzhong1, ZHONG Fagang1   

  1. 1. State Key Laboratory for Sheep Genetic Improvement and Healthy Production, Institute of Animal Husbabdry and Veterinary, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, China;
    2. Animal Husbandry and Veterinary Station of Xinjiang 4th Production and Construction Division, Kekedala 835000, China
  • Received:2020-02-04 Online:2020-07-20 Published:2020-07-18

Abstract: In order to reveal the molecular characteristics and phylogenetic analysis of Oma87 gene of Pasteurella multocida (Pm),the Oma87 gene in Pm8 (capsular serotype A) was amplified and cloned,the sequence and antigenicity was analyzed by bioinformatics software and conducted to construct phylogenetic tree in this study.The results showed that the length of the Oma87 gene was 2 376 bp,which encoded 791 amino acids.Amino acid sequence analysis found that the Oma87 protein was an acidic protein with hydrophilicity,which had high stability.It had a signal peptide but without transmembrane domain.The secondary and tertiary structure analysis found that the Oma87 protein was "N" type three-dimensional structure formed by random coils connected multiple extended strands.The nucleotide homology analysis result showed that the Oma87 gene of Xinjiang isolated strain Pm8 was highly homologous with bovine Pm (capsular serogroup A) isolated and part of swine Pm (capsular serogroup A) from other different geographic regions,but not highly homologous to other capsular serotype group.VaxiJen classified Oma87 protein as probable antigen because it had a value of 0.5478 which was higher than the normal threshold value of 0.4,proved that Oma87 protein could act as the immunogenic protein,which laid a foundation for further study on Oma87 protein as Pm vaccine candidate antigen.

Key words: Pasteurella multocida; Oma87 gene; molecular characteristics; antigenicity; phylogenetic

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