华北农学报 ›› 2023, Vol. 38 ›› Issue (6): 184-191. doi: 10.7668/hbnxb.20193801

所属专题: 植物保护 生物技术

• 资源环境·植物保护 • 上一篇    下一篇

黏虫新型抗菌肽Mysdiap基因克隆、序列分析及原核表达

张元臣1,2, 胡梦杰1, 薛爽1,2, 郭文军3, 沈红4, 王景顺1,2   

  1. 1 安阳工学院 生物与食品工程学院,河南 安阳 455000
    2 河南省太行山林业有害生物野外科学观测研究站,河南 林州 456550
    3 河南省安阳市殷都区自然资源局,河南 安阳 455000
    4 洛阳市森林病虫害防治检疫站,河南 洛阳 471000
  • 收稿日期:2023-06-25 出版日期:2023-12-28
  • 通讯作者:
    王景顺(1972—),男,河南安阳人,教授,博士,主要从事森林昆虫生态学研究。
  • 作者简介:

    张元臣(1984—),男,河南南阳人,副教授,博士,主要从事昆虫分子生态学研究。

  • 基金资助:
    国家青年自然科学基金项目(31802007); 河南省教育厅高校重点项目(22B220001); 安阳工学院博士后科研启动基金(BSH2020006)

Cloning,Sequence Analysis and Prokaryotic Expression of Novel Antimicrobial Peptide Gene Mysdiap in Oriental Armyworm,Mythimna separata

ZHANG Yuanchen1,2, HU Mengjie1, XUE Shuang1,2, GUO Wenjun3, SHEN Hong4, WANG Jingshun1,2   

  1. 1 College of Biology and Food Engineering,Anyang Institute of Technology,Anyang 455000,China
    2 Taihang Mountain Forest Pests Observation and Research Station of Henan Province,Linzhou 456550,China
    3 Bureau of Natural Resources of Yindu District,Anyang City,Anyang 455000,China
    4 Forest Diseases and Pest Quarantine Station of Luoyang,Luoyang 471000,China
  • Received:2023-06-25 Published:2023-12-28

摘要:

利用反转录PCR(RT-PCR)和末端快速扩增(RACE)技术从三龄黏虫体内获得新型抗菌肽Diapausin基因的全长序列,利用生物信息学软件对该序列进行分析,并用原核表达体系对其进行诱导表达,为探究该基因的结构和功能提供理论参考。结果表明,成功克隆到了黏虫新型抗菌肽Diapausin基因,命名为Mysdiap (GenBank登录号:AZJ51075)。该基因全长537 bp,其中5'端和3'端非编码区分别为63,279 bp,开放阅读框全长195 bp,编码64个氨基酸残基,预测蛋白质分子质量为7.13 ku,等电点为5.59。Mysdiap的N端前24个氨基酸残基为信号肽序列。多重联配结果表明,Mysdiap氨基酸序列中具有高度保守区域ECCRAHG。成功构建了pET-Mysdiap重组表达质粒,并在大肠杆菌中用IPTG诱导其表达,表达的重组蛋白分子质量在20 ku左右,以包涵体和可溶性蛋白形式存在。综上,从黏虫中克隆获得了新型抗菌肽基因Mysdiap的全长序列,并在大肠杆菌中成功诱导其表达。

关键词: 黏虫, 抗菌肽, Diapausin基因, 基因克隆, 原核表达

Abstract:

The full-length sequence of Diapausin,a novel antimicrobial peptide gene,was obtained from the third instar of oriental armyworm(Mythimna separata)by RT-PCR and RACE.And then,the amino acid sequence of Diapausin gene was analyzed by bioinformatics software.Finally,the prokaryotic expression system was used to induce the protein expression.This study would lay a theoretical foundation for further parsing of the function and structure of Diapausin gene in M.separata. Results showed that the novel antimicrobial peptide gene Diapausin was successfully cloned from M.separata and named Mysdiap (GenBank No.AZJ51075).The total length of this gene was 537 bp,with the 5' and 3' non-coding ends of 63,279 bp,respectively.The full length of the open reading frame was 195 bp,encoding 64 amino acid residues.The molecular weight and the isoelectric point of the protein were 7.13 ku and 5.59,respectively.The first 24 N-terminal amino acid residues of Mysdiap were signal peptide sequences.Multiple alignment of amino acid sequences showed that Mysdiap had a highly conserved region ECCRAHG.The recombinant expression plasmid pET-Mysdiap was successfully constructed and induced to express proteins by IPTG in Escherichia coli.The molecular weight of the expressed recombinant protein was about 20 ku,which could exist in both inclusion bodies and soluble proteins.In summary,the full-length sequence of the novel antimicrobial peptide gene Mysdiap was cloned from M.separata and successfully induced to express proteins in E.coli.

Key words: Mythimna separata, Antibacterial peptide, Diapausin gene, Gene cloning, Prokaryotic expression

引用本文

张元臣, 胡梦杰, 薛爽, 郭文军, 沈红, 王景顺. 黏虫新型抗菌肽Mysdiap基因克隆、序列分析及原核表达[J]. 华北农学报, 2023, 38(6): 184-191. doi: 10.7668/hbnxb.20193801.

ZHANG Yuanchen, HU Mengjie, XUE Shuang, GUO Wenjun, SHEN Hong, WANG Jingshun. Cloning,Sequence Analysis and Prokaryotic Expression of Novel Antimicrobial Peptide Gene Mysdiap in Oriental Armyworm,Mythimna separata[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(6): 184-191. doi: 10.7668/hbnxb.20193801.

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