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1. (Article ID: 8632)
 
Sordon S, Popłoński J, Tronina T, Huszcza E
Microbial glycosylation of daidzein, genistein and biochanin A: two new glucosides of biochanin A
Molecules 22(1) (2017) E81 (1-9)
 

Biotransformation of daidzein, genistein and biochanin A by three selected filamentous fungi was investigated. As a result of biotransformations, six glycosylation products were obtained. Fungus Beauveria bassiana converted all tested isoflavones to 4″-O-methyl-7-O-glucosyl derivatives, whereas Absidia coerulea and Absidia glauca were able to transform genistein and biochanin A to genistin and sissotrin, respectively. In the culture of Absidia coerulea, in addition to the sissotrin, the product of glucosylation at position 5 was formed. Two of the obtained compounds have not been published so far: 4″-O-methyl-7-O-glucosyl biochanin A and 5-O-glucosyl biochanin A (isosissotrin). Biotransformation products were obtained with 22%-40% isolated yield.

fungi, genistein, microbial glycosylation, daidzein, biochanin A, isoflavones

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2. (Article ID: 8898)
 
Sordon S, Popłoński J, Tronina T, Huszcza E
Regioselective O-glycosylation of flavonoids by fungi Beauveria bassiana, Absidia coerulea and Absidia glauca
Bioorganic Chemistry 93 (2019) ID 102750
 

In the present study, the species: Beauveria bassiana, Absidia coerulea and Absidia glauca were used in biotransformation of flavones (chrysin, apigenin, luteolin, diosmetin) and flavanones (pinocembrin, naringenin, eriodictyol, hesperetin). The Beauveria bassiana AM 278 strain catalyzed the methylglucose attachment reactions to the flavonoid molecule at positions C7 and C3'. The application of the Absidia genus (A. coerulea AM 93, A. glauca AM 177) as the biocatalyst resulted in the formation of glucosides with a sugar molecule present at C7 and C3' positions of flavonoids skeleton. Nine of obtained products have not been previously reported in the literature.

biotransformation, Beauveria bassiana, Absidia coerulea, microbial glycosylation, Absidia glauca, flavanones, flavones

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