2012-04-26Bombyx mori , serine protease inhibitor , pathogenic microbial-induction , defense,"/> 家蚕丝氨酸蛋白酶抑制剂BmSPI37的克隆、 表达及微生物诱导分析

中国农业科学 ›› 2012, Vol. 45 ›› Issue (23): 4898-4908.doi: 10.3864/j.issn.0578-1752.2012.23.017

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家蚕丝氨酸蛋白酶抑制剂BmSPI37的克隆、 表达及微生物诱导分析

 李游山, 赵萍, 董照明, 邹勇, 夏庆友, 向仲怀   

  1. 西南大学家蚕基因组生物学国家重点实验室,重庆 400716
  • 收稿日期:2012-04-26 出版日期:2012-12-01 发布日期:2012-07-12
  • 通讯作者: li_youshan@126.com。通信作者赵 萍,Tel:023-68250885;E-mail:zhaop@swu.edu.cn
  • 作者简介:李游山,E-mail:li_youshan@126.com
  • 基金资助:

    国家基础研究计划(2012CB114600)、国家高技术研究发展计划(2011AA100306)、国家自然科学基金(30972147)

Cloning, Expression and Microbial-Induction Analysis of Bombyx mori Serine Protease Inhibitor BmSPI37

 LI  You-Shan, ZHAO  Ping, DONG  Zhao-Ming, ZOU  Yong, XIA  Qing-You, XIANG  Zhong-Huai   

  1. State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716
  • Received:2012-04-26 Online:2012-12-01 Published:2012-07-12

摘要: 【目的】鉴定新的家蚕蛋白酶抑制剂,探讨其在抵御病原微生物入侵方面的功能。【方法】对家蚕蛋白酶抑制剂BmSPI37进行T-A克隆、多序列比对、系统发育树构建、原核表达、RT-PCR时空表达特征及微生物诱导分析。【结果】克隆、表达了1个新的丝氨酸蛋白酶抑制剂,命名为BmSPI37。时空表达特征分析表明,BmSPI37在家蚕5龄幼虫后期表达量很高,而且在中部丝腺中高量表达;在蛹向蛾的变态发育时期,BmSPI37在雌蚕中的表达量显著高于雄蚕。微生物诱导试验表明,BmSPI37在大肠杆菌、黑胸败血菌、球孢白僵菌感染后,强烈上调表达。【结论】推测BmSPI37与防御病原微生物入侵有关。

关键词: 家蚕 , 丝氨酸蛋白酶抑制剂 , 病原微生物诱导 , 防御

Abstract: 【Objective】 The objective of this study is to identify a new protease inhibitor of silkworm (Bombyx mori) and to investigate its function in guarding against invasion of pathogenic microorganisms. 【Method】 T-A cloning, multiple sequence alignment, construction of phylogenetic tree, prokaryotic expression, spatio-temporal expression profile analysis and microbial-induced experiments were performed with BmSPI37. 【Result】 A new serine proteinase inhibitor, named BmSPI37, was cloned and expressed. Spatio-temporal expression profile analysis showed that BmSPI37 expressed highly at the late stage of 5th instar larvae, and expressed highly in the middle silk gland. The expression of BmSPI37 was significantly higher in female than in male during metamorphosis period from pupa to moth. Analysis of the expression of BmSPI37 after infection with Escherichia coli, Bacillus bombysepticus or Beauveria bassiana showed that BmSPI37 was strongly up-regulated.【Conclusion】It is speculated that BmSPI37 is related to defense against pathogenic microorganisms.

Key words: font-size: 10.5pt, mso-bidi-font-size: 10.0pt, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, 2012-04-26Bombyx mori ')">mso-fareast-font-family: 宋体" lang="EN-US">2012-04-26Bombyx mori , serine protease inhibitor , pathogenic microbial-induction , defense