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Biotechnological production of plant‐specific hydroxylated phenylpropanoids
Author(s) -
Lin Yuheng,
Yan Yajun
Publication year - 2014
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.25237
Subject(s) - piceatannol , hydroxylation , phenylpropanoid , chemistry , monooxygenase , umbelliferone , biocatalysis , naringenin , resveratrol , biochemistry , organic chemistry , cytochrome p450 , enzyme , biosynthesis , coumarin , flavonoid , ionic liquid , antioxidant , catalysis
Hydroxylated phenylpropanoid compounds (e.g., esculetin, piceatannol, and eriodictyol) have been proved to possess important biological activities and pharmacological properties. These compounds exist at low abundance in nature, which hampers their cost‐effective isolation, and broad application. Meanwhile, regiospecific hydroxylation of complex aromatic compounds is still quite challenging for chemical synthesis. In past decades, biocatalytic hydroxylation of plant phenylpropanoids was achieved due to the identification and engineering of some cytochrome P450 hydroxylases; however, the conversion efficiency was still too low for scale‐up production use. In this work, we identify a non‐P450 monooxygenase (HpaBC) from Escherichia coli , which is able to catalyze the efficient ortho ‐hydroxylation towards plant phenylpropanoids umbelliferone and resveratrol; meanwhile it also exhibits activity towards naringenin. On this basis, whole‐cell biocatalysis enables the production of esculetin and piceatannol at high titers (2.7 and 1.2 g/L, respectively, in shake flasks) and high yields (close to 100%). To our knowledge, this work reports the highest titers and yields for biotechnological production of esculetin and piceatannol, representing a promising hydroxylation platform. Biotechnol. Bioeng. 2014;111: 1895–1899. © 2014 Wiley Periodicals, Inc.