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Biosynthesis of para-Cyclophane-Containing Hirsutellone Family of Fungal Natural Products

et al.

Published Web Location

https://doi.org/10.1021/jacs.1c00098
Abstract

Hirsutellones are fungal natural products containing a macrocyclic para-cyclophane connected to a decahydrofluorene ring system. We have elucidated the biosynthetic pathway for pyrrocidine B (3) and GKK1032 A2 (4). Two small hypothetical proteins, an oxidoreductase and a lipocalin-like protein, function cooperatively in the oxidative cyclization of the cyclophane, while an additional hypothetical protein in the pyrrocidine pathway catalyzes the exo-specific cycloaddition to form the cis-fused decahydrofluorene.

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