1. Metatranscriptomics-guided discovery and characterization of a polyphenol-metabolizing gut microbial enzyme.
- Author
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Bae, Minwoo, Le, Chi, Mehta, Raaj S., Dong, Xueyang, Pieper, Lindsey M., Ramirez, Lorenzo, Alexander, Margaret, Kiamehr, Sina, Turnbaugh, Peter J., Huttenhower, Curtis, Chan, Andrew T., and Balskus, Emily P.
- Abstract
Gut microbial catechol dehydroxylases are a largely uncharacterized family of metalloenzymes that potentially impact human health by metabolizing dietary polyphenols. Here, we use metatranscriptomics (MTX) to identify highly transcribed catechol-dehydroxylase-encoding genes in human gut microbiomes. We discover a prevalent, previously uncharacterized catechol dehydroxylase (Gp Hcdh) from Gordonibacter pamelaeae that dehydroxylates hydrocaffeic acid (HCA), an anti-inflammatory gut microbial metabolite derived from plant-based foods. Further analyses suggest that the activity of Gp Hcdh may reduce anti-inflammatory benefits of polyphenol-rich foods. Together, these results show the utility of combining MTX analysis and biochemical characterization for gut microbial enzyme discovery and reveal a potential link between host inflammation and a specific polyphenol-metabolizing gut microbial enzyme. [Display omitted] • Metatranscriptomics analysis identifies prevalent gut bacterial catechol dehydroxylases • A catechol dehydroxylase from G. pamelaeae (Gp Hcdh) is highly transcribed in vivo • Gp Hcdh dehydroxylates hydrocaffeic acid, an abundant anti-inflammatory polyphenol • Gp Hcdh level correlates with anti-inflammatory activity of cruciferous vegetables Bae et al. uncover that a highly transcribed member (Gp Hcdh) of the gut bacterial catechol dehydroxylase family metabolizes hydrocaffeic acid, an abundant anti-inflammatory polyphenol. Analyses of human data suggest that the activity of Gp Hcdh may reduce anti-inflammatory activity of foods that are major sources of hydrocaffeic acid. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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