Journal of Integrative Agriculture ›› 2015, Vol. 14 ›› Issue (2): 337-346.DOI: 10.1016/S2095-3119(14)60771-1

• 论文 • 上一篇    下一篇

Characterization and functional analysis of β-1,3-galactosyltransferase involved in Cry1Ac resistance from Helicoverpa armigera (Hübner)

 ZHANG Li-li, LIANG Ge-mei, GAO Xi-wu, CAO Guang-chun, GUO Yu-yuan   

  1. 1、College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, P.R.China
    2、State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
  • 收稿日期:2013-12-31 出版日期:2015-02-01 发布日期:2015-02-11
  • 通讯作者: LIANG Ge-mei, Tel: +86-10-62815929, E-mail: gmliang@ippcaas.cn; GUO Yu-yuan, E-mail: yyguo@ippcaas.cn
  • 作者简介:ZHANG Li-li, E-mail: zhangliliwell@126.com
  • 基金资助:

    This research was supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2012BAD19B05) and the National Natural Science Foundation of China (30971921,31321004). We would like to thank Biotechnology Group in Institute of Plant Protection, Chinese Academy of Agricultural Sciences for provision of Cry1Ac strain.

Characterization and functional analysis of β-1,3-galactosyltransferase involved in Cry1Ac resistance from Helicoverpa armigera (Hübner)

 ZHANG Li-li, LIANG Ge-mei, GAO Xi-wu, CAO Guang-chun, GUO Yu-yuan   

  1. 1、College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, P.R.China
    2、State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
  • Received:2013-12-31 Online:2015-02-01 Published:2015-02-11
  • Contact: LIANG Ge-mei, Tel: +86-10-62815929, E-mail: gmliang@ippcaas.cn; GUO Yu-yuan, E-mail: yyguo@ippcaas.cn
  • About author:ZHANG Li-li, E-mail: zhangliliwell@126.com
  • Supported by:

    This research was supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2012BAD19B05) and the National Natural Science Foundation of China (30971921,31321004). We would like to thank Biotechnology Group in Institute of Plant Protection, Chinese Academy of Agricultural Sciences for provision of Cry1Ac strain.

摘要: Carbohydrate chains are the principal antigens by which Bacillus thuringiensis (Bt) identify receptor proteins. The interaction between the antigen and Bt causes a pore in the membrane of midgut epithelial cells of insects. Receptor proteins, such as aminopeptidase N and alkaline phosphatase, are glycoproteins. Cadherin is another cell surface receptor protein which has potential glycosylation sites. Glycosyltransferase is very important for the synthesis and modification of receptor proteins. It can indirectly influence the function of Bt. The 1 950 bp full-length cDNA encoding β-1,3-galactosyltransferase was cloned from the the midgut of Helicoverpa armigera by degenerative PCR combined with RACE techniques (GAL-Harm, GenBank accession no.: GQ904195.1) with two potential N-glycosylation sites (157NNTI160 and 272NKTL275). Protein sequence alignments revealed that H. armigera β-1,3-galactosyltransferase shared high identity with β-1,3-galactosyltransferase in other insect species. The expression level of the β-1,3-galactosyltransferase gene in Cry1Ac-resistant H. armigera larvae was 9.2-fold higher than that in susceptible strain. The function of β-1,3-galactosyltransferase was investigated using RNAi technique. The result showed Cry1Ac enhanced the toxicity against the siRNA-treated larvae compared with non-siRNA-treated ones, which indicated β-1,3-galactosyltransferase played an important role for the insecticidal toxicity of Cry1Ac in H. armigera.

关键词: &beta, -1 , 3-galactosyltransferase , Cry1Ac , resistance , Helicoverpa armigera , RNAi

Abstract: Carbohydrate chains are the principal antigens by which Bacillus thuringiensis (Bt) identify receptor proteins. The interaction between the antigen and Bt causes a pore in the membrane of midgut epithelial cells of insects. Receptor proteins, such as aminopeptidase N and alkaline phosphatase, are glycoproteins. Cadherin is another cell surface receptor protein which has potential glycosylation sites. Glycosyltransferase is very important for the synthesis and modification of receptor proteins. It can indirectly influence the function of Bt. The 1 950 bp full-length cDNA encoding β-1,3-galactosyltransferase was cloned from the the midgut of Helicoverpa armigera by degenerative PCR combined with RACE techniques (GAL-Harm, GenBank accession no.: GQ904195.1) with two potential N-glycosylation sites (157NNTI160 and 272NKTL275). Protein sequence alignments revealed that H. armigera β-1,3-galactosyltransferase shared high identity with β-1,3-galactosyltransferase in other insect species. The expression level of the β-1,3-galactosyltransferase gene in Cry1Ac-resistant H. armigera larvae was 9.2-fold higher than that in susceptible strain. The function of β-1,3-galactosyltransferase was investigated using RNAi technique. The result showed Cry1Ac enhanced the toxicity against the siRNA-treated larvae compared with non-siRNA-treated ones, which indicated β-1,3-galactosyltransferase played an important role for the insecticidal toxicity of Cry1Ac in H. armigera.

Key words: β-1 , 3-galactosyltransferase , Cry1Ac , resistance , Helicoverpa armigera , RNAi