Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (5): 200-205.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.031

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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 Online:2015-05-18 Published:2015-05-18

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