生物技术通报 ›› 2015, Vol. 31 ›› Issue (5): 200-205.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.031

• 研究报告 • 上一篇    下一篇

家蝇抗真菌肽-溶菌酶基因的克隆、表达及序列分析

彭传林1,2, 魏川川1, 吴建伟1, 王宇1,3, 修江帆1, 尚小丽1, 赵学军1   

  1. (1.贵阳医学院寄生虫学教研室,贵阳 550004;2.皖北煤电集团总医院,宿州 234000;3.贵州省疾病预防控制中心,贵阳 550004)
  • 收稿日期:2014-09-01 出版日期:2015-05-18 发布日期:2015-05-18
  • 作者简介:彭传林,男, 硕士研究生,主治医师,研究方向:分子生物学;E-mail:2463749164@qq.com
  • 基金资助:
    国家科技支撑计划(2011BAC06B12),国家自然科学基金项目(81360254),贵州省科学技术基金项目(黔科合J字[2012] 2038号)

Cloning,Expression and Sequence Analysis of Musca domestica Antifungal Peptide-1 and Musca domestica Lysozyme

Peng Chuanlin 1,2, Wei Chuanchuan1, Wu Jianwei1, Wang Yu1,3, Xiu Jiangfan1, Shang Xiaoli 1, Zhao Xuejun1   

  1. (1. Department of Parasitology,Guiyang Medical College,Guiyang 550004;2. General Surgery of Wanbei Coal-electricity Group General Hospital,Suzhou 234000;3. Guizhou Center for Disease Control and Prevention,Guiyang 550004)
  • Received:2014-09-01 Published:2015-05-18 Online:2015-05-18

摘要: 旨在对家蝇抗真菌肽MAF-1-溶菌酶(LZM)基因进行生物信息学分析,并进行融合基因MAF-1-LMZ的克隆和表达分析。从GenBank获得家蝇抗真菌肽MAF-1和溶菌酶LZM的编码序列,分析和预测这两种蛋白质的结构和功能。PCR扩增融合蛋白质抗真菌肽-溶菌酶的基因 MAF-1-LMZ,将其克隆到原核表达载体pET-28a中,重组质粒pET-28a-MAF-1-LMZ在大肠杆菌OrigmiB/DE3中经用IPTG诱导表达,表达产物MAF-1-LMZ通过SDS-PAGE电泳进行鉴定,采用小试管法倍比稀释法进行活性验证。结果显示,融合蛋白质MAF-1-LMZ序列的ORF为969 bp,编码322个氨基酸残基,理论分子量为35 468.6 Da,等电点为8.31,在大肠杆菌OrigmiB/DE3中得到成功表达。其纯化后的目的蛋白具有抗真菌活性。

关键词: 家蝇, 抗真菌肽-溶菌酶, 重组表达, 序列分析

Abstract: The aim of this study is to have bioinformatics analysis of Musca domesitca antifungal peptide-1(MAF-1)and lysozymeb(LMZ), also clone fused MAF-1-LMZ gene and have expression analysis of it. The encoding sequences of MAF-1 and LMZ were fetched from GenBank, and the structures and functions of 2 proteins were analyzed and predicted. The gene MAF-1-LMZ was amplified by polymerase chain reaction(PCR), then was ligated into pET 28a and transformed into E. coli Origmi(DE3)competent cell, and induced with IPTG. The fusion protein MAF-1-LMZ in the expression vector was analyzed by SDS-PAGE. The activity of the protein was validated by methods of small test tube and doubling dilution. The open reading frame of the MAF-1-LMZ was 969 bp, encoding a putative protein consisting of 322 amino acids with a predicted molecular weight of 35 468.6 Da and pI of 8.31, indicating the gene expressed in E. coli Origmi(DE3)successfully. The purified target protein had the antifungal activity.

Key words: Musca domestica, antifungal peptide-1 with Lysozyme, recombinant expression, sequence analysis