Metabolic rate shifts in fermentations expressing...

C - Chemistry – Metallurgy – 12 – P

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C12P 21/02 (2006.01) C07K 16/24 (2006.01) C07K 16/28 (2006.01) C12N 1/20 (2006.01) C12P 21/00 (2006.01) C12P 21/08 (2006.01)

Patent

CA 2426100

The invention provides a method for increasing product yield of a polypeptide of interest produced by recombinant host cells, where expression of the polypeptide by the recombinant host cells is regulated by an inducible system. More specifically, the method involves culturing the recombinant host cells under conditions of high metabolic and growth rate and then reducing the metabolic rate of the recombinant host cells at the time of induction of polypeptide expression. In particular, the invention provides a method of increasing product yield of an antibody, growth factor, or protease produced by a recombinant E. coli host cell regulated by an inducible system.

La présente invention concerne un procédé qui permet d'augmenter le rendement d'un polypeptide présentant un intérêt produit par des cellules hôtes de recombinaison, l'expression du polypeptide par les cellules hôtes de recombinaison étant régulé par un système inductible. De manière plus spécifique, le procédé consiste à cultiver les cellules hôtes de recombinaison dans des conditions de rythme et de croissance métaboliques élevés puis à réduire le rythme métabolique des cellules hôtes de recombinaison au moment de l'induction de l'expression du polypeptide. Cette invention concerne plus particulièrement un procédé qui permet d'augmenter le rendement d'un anticorps, d'un facteur de croissance ou d'une protéase produit par une cellule hôte E.coli de recombinaison régulée par un système inductible.

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