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Flavonoid-converting capabilities of Clostridium butyricum
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Flavonoid-converting capabilities of Clostridium butyricum
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Journal Article
Flavonoid-converting capabilities of Clostridium butyricum
2025
Overview
Clostridium butyricum
inhabits various anoxic environments, including soil and the human gut. Here, this common bacterium comes into contact with abundant plant-derived flavonoids. Metabolization of these bioactive polyphenols has been studied in recent years, particularly focusing on gut bacteria due to the proposed health-promoting properties of these dietary constituents. Based on an initial report in 1997 on eriodictyol degradation (Miyake et al. 1997, J Agric Food Chem, 45:3738–3742), the present study systematically investigated
C. butyricum
for its ability to convert a set of structurally diverse flavonoids. Incubation experiments revealed that
C. butyricum
deglycosylated flavonoid
O
-glucosides but only when glucose was absent. Moreover, aglycone members of flavone, flavanone, dihydrochalcone, and flavanonol subclasses were degraded. The C-ring cleavage of the flavanones, naringenin and eriodictyol, was stereospecific and finally resulted in formation of the corresponding hydroxyphenylpropionic acids. Stereospecific C-ring cleavage of the flavanonol taxifolin led to taxifolin dihydrochalcone.
C. butyricum
did neither cleave flavonols and isoflavones nor catalyze de-rhamnosylation, demethylation, or dehydroxylation of flavonoids. Genes encoding potential flavonoid-metabolizing enzymes were detected in the
C. butyricum
genome. Overall, these findings indicate that
C. butyricum
utilizes flavonoids as alternative substrates and, as observed for the dihydrochalcone phloretin, can eliminate growth-inhibiting flavonoids through degradation.
Key points
• Clostridium butyricum deglycosylated flavonoid O-glucosides.
• Clostridium butyricum converted members of several flavonoid subclasses.
• Potential flavonoid-metabolizing enzymes are encoded in the C. butyricum genome.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
