Increase in the production of beta-carotene in recombinant Escherichia coli cultured in a chemically defined medium supplemented with amino acids

Abstract

Escherichia coli DH5 alpha strain was selected as the recombinant host, and a chemically defined medium supplemented with amino acids was used instead of a complex medium for the efficient production of beta-carotene. In a fed-batch culture using glycerol with a chemically defined medium supplemented with amino acids, the concentration, specific content, and productivity of beta-carotene were 2,470 mg/l, 72 mg/g cells, and 77 mg/l h after 32 h, respectively. These values were, respectively, 43, 33, and 26 % higher than those obtained using the complex medium. This is the highest beta-carotene production that has been reported among the recombinant cells to date.