Optimization of the expression of serine proteases in host cells

Abstract

The present invention relates to a method for the recombinant production of a serine protease comprising (a) culturing a host cell comprising one or more vectors, wherein the one or more vectors encode in expressible form the serine protease and a proteinaceous inhibitor of the serine protease, wherein the proteinaceous inhibitor of the serine protease is heterologous with respect to the serine protease, under conditions wherein the serine protease and the proteinaceous inhibitor of the serine protease are expressed; or (a') culturing a host cell the genome of which encodes in expressible form the serine protease and a proteinaceous inhibitor of the serine protease, wherein the proteinaceous inhibitor of the serine protease is heterologous with respect to the serine protease, and wherein the coding sequences of the serine protease and/or the proteinaceous inhibitor have been introduced into the host cell genome by applying a CRISPR technology, under conditions wherein the serine protease and the proteinaceous inhibitor of the serine protease are expressed; and (b) isolating the serine protease expressed in step (a) or (a′) from the host cell. The present invention also relates to a host cell comprising one or more vectors, wherein the one or more vectors encode in expressible form a serine protease and a proteinaceous inhibitor of the serine protease.