畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (11): 1830-1836.doi: 10.11843/j.issn.0366-6964.2014.11.013

• 预防兽医 • 上一篇    下一篇

猪流行性腹泻病毒SNORF3基因的遗传变异分析

王隆柏1,林裕胜1,2,车勇良1,吴学敏1,陈如敬1,邵良平2,周伦江1*   

  1. (1.福建省农业科学院畜牧兽医研究所,福州 350013;2.福建农林大学动物科学院,福州 350002)
  • 收稿日期:2014-03-27 出版日期:2014-11-23 发布日期:2014-11-23
  • 通讯作者: 周伦江(1973-),男,福建周宁人,研究员,E-mail:lunjiang@163.com
  • 作者简介:王隆柏(1977-),男,福建宁化人,副研究员,主要从事分子生物学与免疫学研究
  • 基金资助:

    福建省公益性科研专项(2013R1025-7);福建省农科院青年创新基金项目(2012DQB-3)

Genetic Variation Analysis of SN and ORF3 Genes of Porcine Epidemic Diarrhea Virus

WANG Long-bai1,LIN Yu-sheng1,2,CHE Yong-liang1,WU Xue-min1,CHEN Ru-jing1,SHAO Liang-ping2,ZHOU Lun-jiang1*   

  1. (1.Institute of Animal Husbandry and Veterinary Medicine,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China;2.College of Animal Science,Fujian Agricultural and Forestry University,Fuzhou 350002,China)
  • Received:2014-03-27 Online:2014-11-23 Published:2014-11-23

摘要:

为探明2012—2013年在福建省流行猪流行性腹泻病毒(PEDV)结构蛋白的遗传变异情况,对7株PEDV流行毒株的SNORF3基因进行克隆、测序及分析。结果表明:7株PEDV S基因之间的核苷酸相似性为98.6%~99.4%,与attenuated DR13弱毒株和CV777标准株的相似性分别为93.7%~94.1%和93.8%~94.1%;同CV777标准株比较,存在64个氨基酸突变,其中有3个氨基酸较以往国内外流行毒株的变异不一样,为新变异氨基酸,氨基酸的插入和缺失与2008年泰国NPPED2008_2 株相似;7株PEDV毒株的N基因和ORF3基因之间核苷酸的相似性分别为96.5%~99.7%和99.7%~100%,与CV777标准株的相似性分别为96.6%~98.0%和96.6%~96.9%。遗传进化树表明:7株PEDV毒株的S基因和ORF3基因与泰国流行毒株的亲缘关系较近,N基因与CV777标准株亲缘关系较近。7株PEDV毒株的S基因和ORF3基因变异程度较大,可能源于泰国及韩国的变异株。

Abstract:

To investigate the variation in structure protein of porcine epidemic diarrhea virus (PEDV),SN and ORF3 genes of 7 PEDV strains were cloned and sequenced from different farms in Fujian in 2012-2013. The results indicated that the nucleotide sequences of S gene shared 98.6%-99.4% identity within them,shared 93.7%-94.1% identity with attenuated DR13 strain,shared 93.8%-94.1% identity with CV777 strain. Compared with CV777 strain,there were 64 variant amino acids,and 3 amino acids different from other prevalent strains at home and abroad,and might be new variations,and 5 amino acids insertion,and 2 amino acids deletion. The amino acids insertion and deletion were similar to NPPED2008_2 strain isolated in Thailand. The nucleotide sequence of N and ORF3 genes shared 96.5%-99.7% and 99.7%-100% identity within them,and shared 96.6%-98.0% and 96.6%-96.9% identity with CV777 strain,respectively. Phylogenetic analysis indicated that S and ORF3 genes of the 7 PEDV strains had a closer relationship with the Thailand strain,and N gene had a closer relationship with the CV777 strain. The results showed that S and ORF3 genes of the 7 PEDV strains varied greatly,and these strains might origin from Thailand and Korea strains.

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