Sulfation

Sulfation in biochemistry is the enzyme-catalyzed addition of sulfate to another molecule. It often refers to a phase II enzyme reaction. This biotransformation process uses its cosubstrate 3'-phosphoadenosine-5'-phosphosulfate (PAPS) to transfer sulfate to a xenobiotic. Most of the time this is effective in rendering the xenobiotic less active from a pharmacological and toxicological standpoint, but sometimes it plays a role in the activation of xenobiotics (e.g. aromatic amines, methyl substituted polycyclic aromatic hydrocarbons).