Characterization of a dynamic metabolon producing the defence compound dhurrin in sorghum

Research output: Contribution to journalArticlepeer-review

Authors

  • Tomas Laursen
  • Jonas Borch
  • Camilla Knudsen
  • Krutika Bavishi
  • Federico Torta
  • Helle Martens
  • Daniele Silvestro
  • Nikos Hadzakis
  • Markus Wenk
  • Carl Erik Olsen
  • Mohammed Motawia
  • Björn Hamberger
  • Birger Moller
  • Jean-Etienne Bassard

Colleges, School and Institutes

Abstract

Metabolic highways may be orchestrated by the assembly of sequential enzymes into protein complexes, or metabolons, to facilitate efficient channeling of intermediates and to prevent undesired metabolic cross-talk while maintaining metabolic flexibility. Here we report the isolation of the dynamic metabolon that catalyzes the formation of the cyanogenic glucoside dhurrin, a defence compound produced in sorghum plants. The metabolon was reconstituted in liposomes, which demonstrated the importance of membrane surface charge and the presence of the glucosyltransferase for metabolic channeling. We used in plant fluorescence lifetime imaging microscopy and fluorescence correlation spectroscopy to study functional and structural characteristics of the metabolon. Understanding the regulation of biosynthetic metabolons offers opportunities to optimize synthetic biology approaches for efficient production of high-value products in heterologous hosts.

Details

Original languageEnglish
Pages (from-to)890-893
JournalScience
Volume354
Issue number6314
Publication statusPublished - 18 Nov 2016