Use of an amino acid auxotrophy cured prokaryotic strain for the recombinant production of a polypeptide

摘要

Herein is reported a method for producing a polypeptide in a prokaryotic cell, comprising the step of cultivating a prokaryotic cell comprising one or more nucleic acids encoding the polypeptide in a chemically defined minimal growth medium and recovering the polypeptide from the prokaryotic cell or the periplasm of the prokaryotic cell or from the medium, wherein the prokaryotic cell is an amino acid auxotrophy cured prokaryotic cell, wherein growth of the amino acid auxotrophy cured prokaryotic cell compared to the non-cured prokaryotic cell under the same cultivation conditions and in the same growth medium requires the supplementation of fewer amino acids to the growth medium, and wherein the chemically defined minimal growth medium is free of the amino acid corresponding to the auxotrophy that has been cured in the auxotrophy cured prokaryotic cell.