Abstract
A chemoselective amino-based probe was designed for discovering natural products with covalent binding potential to lysine. Using this reactivity-based technique, a marine-derived Streptomyces strain was identified, which could produce medermycin as the major metabolite. A new compound, mederpyrrole A, derived from medermycin and anthranilic acid through nonenzymatic reaction was isolated. Medermycin can react with primary amines under mild conditions to generate chimeric products possessing a naphthoquinone-pyrrole skeleton. It can also covalently bind to proteins.
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