›› 2007, Vol. 50 ›› Issue (6): 555-559.doi:

• 研究论文 • 上一篇    下一篇

东亚飞蝗中肠几丁质酶基因的克隆、序列分析及组织定位

张八生,曹月青,张伟,殷幼平,王中康,彭国雄,夏玉先*   

  1. (重庆大学生物工程学院基因工程研究中心,重庆市杀虫真菌农药工程技术研究中心,功能基因及调控技术重庆市重点实验室,重庆400044)
  • 出版日期:2007-06-20 发布日期:2007-12-20
  • 通讯作者: 夏玉先

Cloning, sequence analysis and tissue expression of chitinase gene from the midgut of Locusta migratoria manilensis (Meyen)

ZHANG Ba-Sheng, CAO Yue-Qing, ZHANG Wei, YIN You-Ping, WANG Zhong-Kang, PENG Guo-Xiong, XIA Yu-Xian   

  1. (Genetic Engineering Research Center, School of Bioengineering, Chongqing University, Chongqing Engineering Research Center for Fungal Insecticides, The Key Laboratory of Gene Function and Expression Regulation, Chongqing 400044, China)
  • Online:2007-06-20 Published:2007-12-20
  • Contact: XIA Yu-Xian

摘要: 通过RACE方法,克隆了东亚飞蝗Locusta migratoria manilensis (Meyen)几丁质酶基因 (LmChi)cDNA全序列 (GenBank 登录号:EF092841)。获得的cDNA全长1 604 bp,其中可读框1 452 bp, 编码483个氨基酸。推测其氨基酸序列与18家族昆虫几丁质酶有较高的相似性。与其他几丁质酶一样,东亚飞蝗几丁质酶序列也包含一个信号肽、一个几丁质酶活性位点、一个碳端丝氨酸富集区和一个几丁质结合域。半定量RT-PCR研究表明,LmChi基因只在东亚飞蝗不同发育阶段的中肠组织中表达,而在东亚飞蝗体壁、前肠和后肠均没有发现LmChi基因的转录。  

关键词: 东亚飞蝗, 几丁质酶基因, 中肠, 半定量RT-PCR

Abstract: The full cDNA of chitinase gene (LmChi) from the midgut of Locusta migratoria manilensis (Meyen) was cloned by means of 3′-RACE and 5′-RACE. The results showed that the cDNA was 1 604 bp in length and contained an open reading frame (ORF) of 1 452 bp (GenBank accession number: EF092841), which encoded 483 amino acids. The deduced amino acid sequence, which was composed of a signal peptide, a chitinase active site, a C-terminal serine-rich region and a domain normal present in chitinase, showed a high similarity with other insect chitinases from family 18.Semi-quantitative RT-PCR indicated that LmChi expressed only in the midgut, but not in the integument, foregut and hindgut of L. migratoria manilensis.  

Key words: Locusta migratoria manilensis, chitinase gene, midgut, semi-quantitative RT-PCR