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The biosynthesis of strictosidine, a key intermediate of monoterpene indole alkaloids, was successfully reconstructed in Nicotiana benthamiana, demonstrating the potential of Nicotiana benthamiana as a bioproduction chassis for small molecules.

Iridoid compounds are an important class of natural products. Here, the authors report on the discovery and engineering of nepetalactol-related short chain reductases and their application for the biosynthesis of nepetalactol or nepetalactone stereoisomers, as a versatile system for the production of the iridoid natural product scaffold.

The stereochemistry of the plant heteroyohimbine alkaloids is a key factor determining their diverse biological activities. Here, the authors carry out structural, localization and genetic experiments to understand the mechanism of stereoselectivity for three heteroyohimbine synthases and to identify their function in vivo.