Process for the fermentative production of heterologous proteins by means of Escherichia coli

摘要

Producing a heterologous protein, comprises cultivating a Escherichia coli strain in a fermentation medium, and separating the heterologous protein from the medium, where the E. coli strain contains a gene encoding heterologous protein, the gene is functionally linked with a signal sequence encoding a signal peptide, the strain releases the heterologous protein into the fermentation medium and the E. coli strain exhibits an attenuated guanosine tetraphosphate (ppGpp)/guanosine pentaphosphate (pppGpp)-synthetase II activity (PSII activity).