Sulfotransferase Inhibition: Potential Impact of Diet and Environmental Chemicals on Steroid Metabolism and Drug Detoxification

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Colleges, School and Institutes


The cytosolic sulfotransferase enzymes (SULT isoforms) utilise PAPS (3'-phosphoadenosine-5'-phosphosulfate) as co-factor to transfer sulfonate groups onto a wide range of substrates. SULT1A3 has catecholamines such as dopamine as substrates while SULT 1E1 sulfonates oestrogens. SULT 1A1 sulfonates phenols and also oestrogens at a higher K-m than SULT 1E1. SULT 2A1 mainly sulfonates DHEA and some steroids, with hydroxy derivatives of polycyclic aromatic hydrocarbons. Studies on these isoforms with a range of environmental chemicals and dietary components have shown that SULT 1A1 is significantly inhibited by flavonoids; all flavones and flavonols with a 3',4'-dihydroxy motif had an IC50 of


Original languageEnglish
Pages (from-to)269-275
Number of pages7
JournalCurrent Drug Metabolism
Issue number4
Publication statusPublished - 1 May 2008


  • phthalates, phenols, inhibition, sufotransferase, flavonoids