Halogenation of estrogens catalysed by a fungal chloroperoxidase. Issue 20 (13th October 2022)

• Record Type: Journal Article
• Authors: Undiano, Elizabeth; Roman, Rosa; Miranda-Molina, Alfonso; Ayala, Marcela
• Is Part Of: Natural product research. Volume 36:Issue 20(2022)
• Page Start: 5353
• Page End: 5357
• Publication Date: 2022-10-13
• Subjects: Biotransformation -- chloroperoxidase -- estradiol -- estrogen -- halogenation -- unspecific peroxygenase; Natural products -- Periodicals; Natural products -- Research -- Periodicals; Biological Factors -- Periodicals; Biological Products -- Periodicals; 547
• DOI: 10.1080/14786419.2021.1925269
• Languages: English
• ISSNs: 1478-6419

Abstract

Abstract: Chloroperoxidase (CPO) is a haeme-thiolate enzyme able to catalyse the halogenation and oxidation of a wide range of organic substrates. In this work, the CPO-catalysed chlorination and bromination reaction of natural estrogens was characterised. Estradiol, estrone and equiline were efficiently converted to halogenated compounds in the presence of chloride or bromide and hydrogen peroxide. The catalytic efficiency of CPO in this reaction is similar to that measured for other aromatic substrates; as expected the bromination reaction proceeds more efficiently than the chlorination reaction. Three major products were detected for chlorination of estradiol; two of them were monohalogenated compounds while a third product was a dihalogenated compound at positions 2 and 4 of the aromatic ring A. Chlorinated compounds are not substrates for tyrosinase, suggesting that the halogenated form of estrogens is less susceptible to form o -quinones. Abstract : D001