Process for producing mature recombinant mite group i allergen

C - Chemistry – Metallurgy – 12 – P

Patent

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Details

C12P 21/02 (2006.01) C07K 14/435 (2006.01) C12N 15/00 (2006.01) C12N 15/81 (2006.01)

Patent

CA 2701992

The present invention relates to a process for producing mature recombinant Mite Group I allergen comprising the steps of a) providing an allergen expression system in the form of a host cell selected from the group of yeasts containing a vector comprising cDNA encoding pro- allergen, b) cultivating the allergen expression system at a cultivation pH of between 5.5 and 7.5 for a cultivation period to express pro-allergen to obtain a cultivation mixture containing pro-allergen, c) adjusting the pH of the cultivation mixture to a maturation pH of between 3.5 and 5.0, d) maintaining the cultivation mixture at the maturation pH for a maturation period to convert the pro-allergen into mature allergen to obtain a product mixture, and e) subjecting the product mixture to a purification method to isolate mature allergen from the product mixture.

La présente invention porte sur un procédé de fabrication d'un allergène du groupe I des acariens recombinant mature. Ce procédé comprend les étapes consistant à : a) se procurer un système d'expression d'allergène sous la forme d'une cellule hôte choisie dans le groupe des levures contenant un vecteur comprenant de l'ADNc codant pour un pro-allergène, b) cultiver le système d'expression d'allergène à un pH de culture compris entre 5,5 et 7,5 pendant une période de culture pour exprimer un pro-allergène afin d'obtenir un mélange de culture contenant un pro-allergène, c) ajuster le pH du mélange de culture à un pH de maturation compris entre 3,5 et 5,0, d) maintenir le milieu de culture au pH de maturation pendant une période de maturation pour convertir le pro-allergène en allergène mature afin d'obtenir un mélange de produit, et e) soumettre le mélange de produit à une méthode de purification pour isoler l'allergène mature à partir du mélange de produit.

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