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A new path for terpenoid biosynthesis.

Vincent Courdavault1, Nicolas Papon2

  • 1Biomolécules et Biotechnologies Végétales (BBV), Équipe d'Accueil 2106, Université de Tours, 37200 Tours, France.

Trends in Biochemical Sciences
|August 1, 2022
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Summary
This summary is machine-generated.

Scientists discovered a new pathway for making triterpenes, which are important C30 organic compounds. This new route uses hexaprenyl diphosphate (HexPP) and special terpene synthase (TS) enzymes, challenging old ideas about triterpene biosynthesis.

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Area of Science:

  • Biochemistry
  • Organic Chemistry
  • Molecular Biology

Background:

  • Triterpenes are C30 organic compounds vital to all living organisms.
  • Their biosynthesis was traditionally understood to proceed exclusively from squalene or oxidosqualene.

Purpose of the Study:

  • To describe a newly identified biosynthetic pathway for triterpenes.
  • To characterize the enzymes involved in this novel pathway.

Main Methods:

  • Investigated the cyclization of hexaprenyl diphosphate (HexPP).
  • Utilized terpene synthase (TS) enzymes with bifunctional activity.
  • Analyzed the products of the novel enzymatic reactions.

Main Results:

  • Identified a new triterpene biosynthetic route.
  • Demonstrated the cyclization of HexPP by bifunctional TS enzymes.
  • Challenged the established understanding of triterpene precursor molecules.

Conclusions:

  • A novel pathway for triterpene synthesis exists, distinct from the squalene/oxidosqualene route.
  • Bifunctional terpene synthases play a key role in this alternative pathway.
  • This discovery expands our understanding of natural product biosynthesis.