›› 2017, Vol. 44 ›› Issue (4): 980-985.doi: 10.16431/j.cnki.1671-7236.2017.04.006

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Cloning and Sequence Analysis of VP3 Gene of Cherry Valley Duck-origin Goose Hemorrhagic Polyomavirus

WAN Chun-he, LIU Rong-chang, CHENG Long-fei, FU Guang-hua, FU Qiu-ling, SHI Shao-hua, CHEN Hong-mei, HUANG Yu   

  1. Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fujian Animal Diseases Control Technology Development Center, Institute of Animal Husbandry and Veterinary Medicine of Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
  • Received:2016-08-01 Online:2017-04-20 Published:2017-05-03

Abstract:

In order to investigate goose hemorrhagic polyomavirus (GHPV) infection status in Fujian, China, 19 samples which were collected from different duck species were used to detecte GHPV, only one sample from Cheery Valley duck was tested positive (designated GHPV-FJ201601 strain). VP3 gene specific primers were designed by comparing the characterization of GHPV genomic sequences based on the genomic sequences download from GenBank. The length of the cloned VP3 gene was 654 bp, coding 217 amino acids. The theoretical pI of VP3 protein was 9.37, with 23 total number of negatively charged residues (Asp + Glu) and 28 total number of positively charged residues (Arg + Lys), respectively. The instability index of VP3 protein was 38.43, and it was a stable protein; The fat coefficient was 64.33; The total average hydrophobic index was -0.744. Also, the VP3 protein did not have signal peptides which was located in nucleus and having 14 phosphorylation sites. Nucleotides homology analysis of VP3 gene of GHPV isolates were higher with each other, which were no less than 99.7%. Phylogenetic analysis based on the VP3 gene showed that GHPV-FJ201601 strain shared the same genetic evolution cluster with goose-origin GHPV (14234 strain from Hungary and Toulouse Goose 2000 strain from France) rather than the duck-origin GHPV (Toulouse Muscovy Duck 2008 strain and Toulouse Mule Duck 2008 from France and 106 strain from China), all VP3 gene shared closer genetic distance with each other. In conclusion, this study was first evidence of Cheery Valley duck could infect GHPV in Fujian, which laid a good foundation for the enrichment the GHPV epidemiology data from different area and host.

Key words: goose hemorrhagic polyomavirus; Cherry Valley duck; VP3 gene; clone; sequence analysis

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