Genome-guided investigation of plant natural product biosynthesis

The Plant Journal : for Cell and Molecular Biology
Franziska KellnerSarah E O'Connor

Abstract

The medicinal plant Madagascar periwinkle, Catharanthus roseus (L.) G. Don, produces hundreds of biologically active monoterpene-derived indole alkaloid (MIA) metabolites and is the sole source of the potent, expensive anti-cancer compounds vinblastine and vincristine. Access to a genome sequence would enable insights into the biochemistry, control, and evolution of genes responsible for MIA biosynthesis. However, generation of a near-complete, scaffolded genome is prohibitive to small research communities due to the expense, time, and expertise required. In this study, we generated a genome assembly for C. roseus that provides a near-comprehensive representation of the genic space that revealed the genomic context of key points within the MIA biosynthetic pathway including physically clustered genes, tandem gene duplication, expression sub-functionalization, and putative neo-functionalization. The genome sequence also facilitated high resolution co-expression analyses that revealed three distinct clusters of co-expression within the components of the MIA pathway. Coordinated biosynthesis of precursors and intermediates throughout the pathway appear to be a feature of vinblastine/vincristine biosynthesis. The C. roseus genome a...Continue Reading

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Jan 10, 2016·Current Opinion in Biotechnology·Sabrina Schläger, Birgit Dräger
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