INSILICO DESIGN AND CONSTRUCTION OF A CHIMERIC GENE COMPRISING THE A SUBUNIT OF VIBRIO CHOLERA PILIN AND THE B SUBUNIT OF CHOLERA TOXIN

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AMERIAN MILAD; NAZARIAN SHAHRAM; HONARI HOSEIN; MINAIE MOHAMMAD EBRAHIM; KORDBACHEH EMAD

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Journal: IRANIAN JOURNAL OF MEDICAL MICROBIOLOGY Year:2017 | Volume:11 | Issue:3 Page(s): 37-48

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Title

INSILICO DESIGN AND CONSTRUCTION OF A CHIMERIC GENE COMPRISING THE A SUBUNIT OF VIBRIO CHOLERA PILIN AND THE B SUBUNIT OF CHOLERA TOXIN

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Keywords

VIBRIO CHOLERAEQ2

VIRULENCE FACTORSQ2

CHOLERA TOXINQ2

BIOINFORMATIC DESIGENQ2

CHIMERIC GENEQ2

Abstract

Background and Aims: Cholera is a lethal diarrheal disease that cause by VIBRIO CHOLERAE. CHOLERA TOXIN and colonization factor pili (tcpA) are the major virulence factor in V.choleraepathogenesis. The B subunit of the enterotoxin) ctxB) which is responsible for toxin binding to eukaryotic cells and toxin-coregulated pili A (tcpA) that is essential for V.cholerae colonization, have immunogenic properties. Chimeric proteins carrying epitopes, linkers or adjuvant sequences could increase immunogenicity for recombinant antigens and can also elicit broad immune responses. The aim of this study was to design am immunogen against adherence and toxicity of V.cholorae.Materials and Methods: ctxB and tcpA genes were analyzed for rare codons and gene optimization was performed using optimization software. The half-life and protein instability index was determined. Secondary and tertiary structure was predicted and evaluated. Linear and conformational epitopes were predicted. Recombinant pET28a/chimeric gene plasmid was transformed to E.coli BL21 DE3 and expression was induced with Isopropyl b-D-1-thiogalactopyranoside (IPTG). The protein expression was evaluated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE).Results: Chimeric protein instability index was 24.04 and the codon adaptation index of chimeric constructs increased to 0.9. The tertiary predicted structure of the chimeric proteins confirmed and mRNA was stable. Conformational and linear epitopes were seen in both domains of the chimeric protein. Restriction analysis confirmed cloning of the gene into pET28a vector.Expression of recombinant protein in E.coli led to the production of chimeric protein with 35 k Da molecular weight.Conclusions: According to the results of bioinformatics and recombinant protein expression, the design chimeric protein could be used as an immunogen to evaluate the immunity against cholera.

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APA: Copy

AMERIAN, MILAD, NAZARIAN, SHAHRAM, HONARI, HOSEIN, MINAIE, MOHAMMAD EBRAHIM, & KORDBACHEH, EMAD. (2017). INSILICO DESIGN AND CONSTRUCTION OF A CHIMERIC GENE COMPRISING THE A SUBUNIT OF VIBRIO CHOLERA PILIN AND THE B SUBUNIT OF CHOLERA TOXIN. IRANIAN JOURNAL OF MEDICAL MICROBIOLOGY, 11(3), 37-48. SID. https://sid.ir/paper/132654/en

Vancouver: Copy

AMERIAN MILAD, NAZARIAN SHAHRAM, HONARI HOSEIN, MINAIE MOHAMMAD EBRAHIM, KORDBACHEH EMAD. INSILICO DESIGN AND CONSTRUCTION OF A CHIMERIC GENE COMPRISING THE A SUBUNIT OF VIBRIO CHOLERA PILIN AND THE B SUBUNIT OF CHOLERA TOXIN. IRANIAN JOURNAL OF MEDICAL MICROBIOLOGY[Internet]. 2017;11(3):37-48. Available from: https://sid.ir/paper/132654/en

IEEE: Copy

MILAD AMERIAN, SHAHRAM NAZARIAN, HOSEIN HONARI, MOHAMMAD EBRAHIM MINAIE, and EMAD KORDBACHEH, “INSILICO DESIGN AND CONSTRUCTION OF A CHIMERIC GENE COMPRISING THE A SUBUNIT OF VIBRIO CHOLERA PILIN AND THE B SUBUNIT OF CHOLERA TOXIN,” IRANIAN JOURNAL OF MEDICAL MICROBIOLOGY, vol. 11, no. 3, pp. 37–48, 2017, [Online]. Available: https://sid.ir/paper/132654/en

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