Abstract
For production of genistein from N-acetylcysteamine-attached p-coumarate (p-coumaroyl-NAC) supplemented to the medium, a chalcone synthase (CHS) gene from Glycyrrhiza echinata, a chalcone isomerase (CHI) gene from Pueraria lobata, and an isoflavone synthase (IFS) gene from G. echinata were placed under the control of the galactose-inducible GAL promoters in pESC vector and were introduced in Saccharomyces cerevisiae. When the recombinant yeast cells (0.5 g wet weight) were used as “enzyme bags” and incubated at 30°C for 48 h in 100 ml of the buffer containing galactose and 1 mM (265 mg/l) p-coumaroyl-NAC, ca. 340 μg genistein/l was produced. Another system consisting of two enzyme bags was also generated for the purpose of production of genistein from tyrosine. One enzyme bag was an Escherichia coli cell containing a phenylalanine ammonia-lyase gene from a yeast, a 4-coumarate/cinnamate:CoA ligase gene from the actinomycete Streptomyces coelicolor A3(2), the CHS gene, and the CHI gene, in addition to the acetyl-CoA carboxylase gene from Corynebacteriumglutamicum, all of which were under the control of the isopropyl-β-d-thiogalactopyranoside-inducible T7 promoter, and thus producing (S)-naringenin from tyrosine. The other enzyme bag was a S.cerevisiae cell containing the IFS gene. Coincubation of the E.coli cells (0.5 g wet weight) and S. cerevisiae cells (0.5 g wet weight) at 26°C for 60 h in 20 ml of the buffer containing 3 mM (543 mg/l) tyrosine as the starting substrate yielded ca. 6 mg genistein/l.
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Acknowledgements
We thank S. Ayabe (Nihon University) for providing the cDNAs of IFS and CHS, Y. Ebizuka (The University of Tokyo) for the cDNA of CHI, and K. Imai (University of Tokyo) for advice in genetics of S. cerevisiae. This work was supported by the BioDesign Program of the Ministry of Agriculture, Forestry, and Fisheries of Japan and by a Grant-in-Aid for Scientific Research on Priority Areas “Applied Genomics” from Monkasho.
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Katsuyama, Y., Miyahisa, I., Funa, N. et al. One-pot synthesis of genistein from tyrosine by coincubation of genetically engineered Escherichia coli and Saccharomyces cerevisiae cells. Appl Microbiol Biotechnol 73, 1143–1149 (2007). https://doi.org/10.1007/s00253-006-0568-2
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DOI: https://doi.org/10.1007/s00253-006-0568-2