Method for mass production of antimicrobial peptide

C - Chemistry – Metallurgy – 12 – P

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Details

C12P 21/02 (2006.01) C07K 7/08 (2006.01) C07K 14/435 (2006.01) C07K 14/46 (2006.01) C07K 14/47 (2006.01) C07K 14/815 (2006.01) C07K 19/00 (2006.01) C12N 15/62 (2006.01)

Patent

CA 2261569

The present invention provides a method for mass production of an antimicrobial peptide, which comprises the steps of: constructing a fusion gene containing a first gene encoding a negatively charged acidic peptide having at least two cysteine residues and a second gene encoding a positively charged basic antimicrobial peptide; transforming a host microorganism with an expression vector comprising the fusion gene; cultivating the transformed microorganism to express a fusion peptide containing the acidic peptide and the antimicrobial peptide; and, recovering the expressed antimicrobial peptide. In accordance with the present invention, the inhibitory effect of the expressed antimicrobial peptide on the growth of host microorganism can be dramatically minimized by fusing it with the acidic peptide. Accordingly, antimicrobial peptides can be produced massively from a recombinant microorganism regardless of the kind of the antimicrobial peptides.

Procédé de production en masse d'un peptide antimicrobien, qui consiste à construire un gène obtenu par fusion d'un premier gène codant un peptide acide à charge négative ayant au moins deux restes cystéine, et d'un second gène codant un peptide antimicrobien basique à charge positive, à transformer un micro-organisme hôte avec un vecteur d'expression comportant le gène de fusion, à cultiver le micro-organisme ainsi transformé pour exprimer un peptide de fusion contenant le peptide acide et le peptide antimicrobien, et à récupérer le peptide antimicrobien exprimé. Selon la présente invention, l'effet inhibiteur du peptide antimicrobien exprimé sur la croissance du micro-organisme hôte peut être fortement réduit, grâce à la fusion dudit peptide avec le peptide acide. Par conséquent, des peptides antimicrobiens peuvent être produits massivement à partir d'un micro-organisme de recombinaison, quel que soit le type des peptides antimicrobiens.

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