文章摘要
欧阳岁东.鳗源嗜水气单胞菌主要外膜蛋白基因克隆及其表达[J].水产学报,2006,30(4):566~570
鳗源嗜水气单胞菌主要外膜蛋白基因克隆及其表达
Cloning and expression of the major membrane protein gene of Aeromonas hydrophila strain isolated from Anguilla anguilla
投稿时间:2008-05-30  修订日期:2008-05-30
DOI:10.3724/SP.J.00001
中文关键词: 嗜水气单胞菌  欧鳗  主要外膜蛋白基因  克隆  表达
英文关键词: Aeromonas hydrophila  Anguilla anguilla  major outer membrane protein gene  cloning  expression
基金项目:福建省科技厅资助项目(B0410025)
作者单位E-mail
欧阳岁东 福建省农业科学院畜牧兽医研究所 ouyangsd@sina.com 
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中文摘要:
      
英文摘要:
      A pair of primers were designed according to the published nucleotide sequence of a putative outer membrane protein gene (omp) of Aeromonas hydrophila . With the specific primers, a target fragment about 1.1 kb was amplified from Aeromonas hydrophila ML316 via PCR .The target fragment was inserted into the linearized pGEM-T easy vector. After enzyme restriction and sequencing analysis,the nucleotide data had been further analyzed by DNAman and ClutalW software. The analysis results showed that the cloned DNA fragment had a longest open reading frame (ORF) of 1035 nt,it predicted to be encoded a 344 aa protein with the molecular weight of 36 kD. Hydrophobicity analysis suggested that the protein was highly hydrophilic, especialy at the first 24 amino acid, this region could function as signal peptide. The homologious comparison proved the cloned gene had 96% homology to the sequence of the omp gene, and the alignment of the amino acid sequence was 98% . The recombinant plasmid was constructed with the target gene and the expressing vector pGEX-4T-1 and then was transformed into E. coli BL21(DE3)by BamH and Sal I .The fusion protein was expressed under the IPTG inducing condition,and exhibited about 62 kD in size,very close to the predicted molecular weight of GST MOMP, furthermore,the fusion protein was specifically recognized by anti serum which raised against the major outer membrane protein of AHML316. Considering all these together, it proved that the cloned gene represented the major outer membrane protein gene of AHML316, and the expressed gene products shared identical antigenicity with the natural main outer membrane protein,and also provided technical support for developing an advanced gene engineering vaccine against Aeromonas hydrophila.
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