Production of soluble recombinant protein by pi value...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/64 (2006.01)

Patent

CA 2707188

The present invention relates to a method for improving secretion efficiency of a recombinant foreign protein using a polypeptide fragment containing N-region of a signal sequence (directional signal) or variants thereof with the controlled pi value and/or a secretional enhancer composed of a hydrophilic polypeptide with the controlled pi value. The method of the present inven-tion can be not only useful for the production of a recombinant foreign protein by preventing precipitation of an insoluble precipitate and by increasing extracellular or extra- periplasmic secretion efficiency of a recombinant protein but also useful for the transduction of an effective therapeutic protein by increasing membrane permeability using a strong secretional enhancer.

La présente invention concerne un procédé permettant d'améliorer l'efficacité de la sécrétion d'une protéine étrangère recombinante utilisant un fragment de polypeptide contenant une région N d'une séquence de signal (signal directionnel) ou de variants de celui-ci avec la valeur contrôlée du pi et/ou un agent renforçant la sécrétion composé d'un polypeptide hydrophile avec la valeur contrôlée du pi. Le procédé de la présente invention peut être non seulement utile pour la production d'une protéine étrangère recombinante en empêchant la précipitation d'un précipité insoluble et en augmentant l'efficacité de la sécrétion extracellulaire ou extra-périplasmique d'une protéine recombinante mais est également utile pour la transduction d'une protéine thérapeutique efficace en augmentant la perméabilité membranaire en utilisant un agent renforçant la sécrétion fort.

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