›› 2013, Vol. 40 ›› Issue (10): 81-85.

• 生物技术 • 上一篇    下一篇

新城疫病毒西藏分离株HN基因克隆与序列分析

朱洪云, 田广搂   

  1. 西藏大学农牧学院, 西藏林芝 860000
  • 收稿日期:2013-03-18 出版日期:2013-10-20 发布日期:2013-12-19
  • 通讯作者: 田广搂
  • 作者简介:朱洪云(1967-),男,四川人,博士,副教授,研究方向:兽医临床。
  • 基金资助:
    自治区级临床兽医学重点实验室。

Cloning and Sequence Analysis of HN Gene of Newcastle Disease Virus Tibet Isolates

ZHU Hong-yun, TIAN Guang-lou   

  1. College of Agriculture and Animal Husbandry, Tibet University, Linzhi 860000, China
  • Received:2013-03-18 Online:2013-10-20 Published:2013-12-19

摘要: 为确定西藏新城疫病毒(Newcastle disease virus,NDV)分离株HN基因结构特征及其与已知毒株的遗传相关性,本试验应用RT-PCR技术对西藏NDV分离株HN基因进行扩增,然后克隆至pMD18-T载体测序,并与国内外代表性毒株和当前疫苗株进行比对及系统发育分析。结果表明,NDV分离株HN基因片段长度为1734 bp, 编码577个氨基酸;推导的氨基酸序列均有5个糖基化位点, XZ10和XZ17有12个半胱氨酸残基,XZ20只有11个半胱氨酸残基。NDV西藏分离株HN基因与国内代表性毒株核苷酸同源性在81.1%~93.0%之间,氨基酸同源性在81.1%~93.6%之间;与疫苗株核苷酸同源性在87.8%~98.7%之间,氨基酸同源性在88.0%~98.9%之间。系统进化分析结果表明,NDV西藏分离株HN基因均属于Ⅱ型。

关键词: 新城疫病毒; HN基因; 序列分析

Abstract: To determine the structural characteristics and genetic correlation of NDV HN gene of Tibet,the NDV strains isolated from Tibet were detected by reverse transcriptase-polymerase chain reaction(RT-PCR) in this test.The HN gene was purified and cloned into pMD18-T vector for sequencing.The results showed that the HN gene fragments consisted of 1734 bp coding for 577 amino acids which contained 5 glycosylationsites,the HN gene of XZ10 and XZ17 contained 12 cysteine residues,but XZ20 just contained 11 cysteine residues. Compared with the other Newcastle disease virus strains discovered,the nucleotide homology of HN gene was 81.1% to 93.0%,and amino acid homology was 81.1% to 93.6%.Compared with the current vaccine strains,the nucleotide homology was 87.8% to 98.7%,the amino acid homology was 88.0% to 98.9%.The phylogenetic analysis showed that Tibet NDV strains HN gene belonged to Ⅱ type.

Key words: Newcastle disease virus; HN gene; sequence analysis

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