中国农业科学 ›› 2010, Vol. 43 ›› Issue (11): 2355-2362 .doi: 10.3864/j.issn.0578-1752.2010.11.020

• 兽医 • 上一篇    下一篇

小反刍兽疫病毒P基因的克隆及其结构与功能分析

翟军军,窦永喜,张海瑞,毛立,蒙学莲,骆学农,才学鹏

  

  1. (中国农业科学院兰州兽医研究所/家畜疫病病原生物学国家重点实验室/甘肃省动物寄生虫病重点实验室)
  • 收稿日期:2010-01-05 修回日期:2010-03-23 出版日期:2010-06-01 发布日期:2010-06-01
  • 通讯作者: 才学鹏

Cloning of the Phosphoprotein Gene of Peste des Petits Ruminants and Analysis of Its Structure and Function

ZHAI Jun-jun, DOU Yong-xi, ZHANG Hai-rui, MAO Li, MENG Xue-lian, LUO Xue-nong, CAI Xue-peng
  

  1. (中国农业科学院兰州兽医研究所/家畜疫病病原生物学国家重点实验室/甘肃省动物寄生虫病重点实验室)
  • Received:2010-01-05 Revised:2010-03-23 Online:2010-06-01 Published:2010-06-01
  • Contact: CAI Xue-peng

摘要:

【目的】对小反刍兽疫病毒P基因进行克隆,并对其结构和功能的关系进行分析,为研究小反刍兽疫病毒P蛋白的功能及其在病毒增殖过程中的作用奠定基础。【方法】利用RT-PCR的方法对小反刍兽疫P基因全长进行克隆,通过生物学软件对其核苷酸序列和氨基酸序列进行了比对,利用I-TASSER进行三级结构预测,然后分析其结构和功能之间的关系。【结果】P基因和MV、CDV、RPV、DMV和PDV的P基因的相似性分别为62.9%、63.3%、64.4%、65.1%和60.4%,氨基酸的相似性分别为45.9%、46.2%、50.6%、50.3%和47.0%。三级结构表明该蛋白由3个结构域构成,中间是由多个α-螺旋构成的结构域,主要行使与L大蛋白和RNA结合的功能,两边分别是N-端和C-端结构域,C-端结构域含有3个α-螺旋,分别位于458—468aa、492—499aa和503—505aa位,主要作为N蛋白α-螺旋的结合位点。【结论】本研究成功地克隆小反刍兽疫病毒P基因,分析和预测了p蛋白的结构和功能的关系,为其进一步的生物学功能研究及其应用奠定了基础。

关键词: 小反刍兽疫病毒, P蛋白, 克隆, 结构与功能, 分析

Abstract:

【Objective】 The objective of the present study was to clone the gene of PPRV phosphoprotein and analyze the structure-function relationship of phosphoprotein. 【Method】 The phosphoprotein entire gene of PPRV was cloned by RT-PCR, in addition, the nucleotide and a mino acid sequences were analyzed and compared with other members of Morbillivirus through bioinformatics methods, and the protein tertiary structure was predicted using I-TASSER. 【Result】 Sequence analysis showed that the homologies of nucleotide sequences between PPRV and MV, CDV, RPV, DMV and PDV were 62.9%, 63.3%, 64.4%, 65.1%, and 60.4%, respectively, and the homologies of the deduced amino acid sequences were 45.9%, 46.2%, 50.6%, 50.3%, and 47.0%, respectively. The tertiary structure and analysis indicated that the phosphoprotein was composed of three distinct structural domains: an N-terminal hydrophilic domain, a central domain, and a C-terminal hydrophilic domain. In addition, the central hydrophobic domain of phosphoprotein had lots of alpha helix with the potential to bind both of the large protein and RNA. The C-terminal hydrophilic domain was composed of three alpha helix, and they lay in 458-468aa, 492-499aa and 503-505aa, respectively,and might play a role in their binding of alpha helix of the nucleoprotein. 【Conclusion】 The phosphoprotein gene from PPRV was successfully cloned . Furthermore, the structure and function of this gene were analyzed and predicted.

Key words: PPRV, phosphoprotein, cloning, structure and function, analysis