Related Experiment Videos
Biosynthesis of hyperforin in Hypericum perforatum
Petra Adam1, Duilio Arigoni, Adelbert Bacher
1Lehrstuhl für Organische Chemie und Biochemie, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany.
Journal of Medicinal Chemistry
|October 4, 2002
Summary
Hyperforin biosynthesis in St. John's Wort primarily uses the deoxyxylulose phosphate pathway for isoprenoid units. The phloroglucinol component originates from a distinct polyketide mechanism, revealing key metabolic routes.
Area of Science:
- Metabolic biochemistry
- Natural product biosynthesis
- Plant secondary metabolism
Background:
- Hypericum perforatum (St. John's Wort) is a medicinal plant.
- Hyperforin is a key bioactive compound in St. John's Wort.
- Understanding hyperforin biosynthesis is crucial for its medicinal applications.
Purpose of the Study:
- To elucidate the biosynthetic pathway of hyperforin.
- To determine the origin of hyperforin's structural moieties.
- To investigate the role of the deoxyxylulose phosphate pathway in hyperforin formation.
Main Methods:
- Isotopic labeling of Hypericum perforatum sprouts with (13)C-glucose.
- Isolation and purification of hyperforin.
- Quantitative Nuclear Magnetic Resonance (NMR) spectroscopy for analyzing labeling patterns.
Main Results:
- Biosynthesis of hyperforin involves five isoprenoid moieties.
- These isoprenoid moieties are derived predominantly (>98%) via the deoxyxylulose phosphate pathway.
- The phloroglucinol moiety is generated through a polyketide-type mechanism.
Conclusions:
- The deoxyxylulose phosphate pathway is the primary route for isoprenoid units in hyperforin.
- A polyketide mechanism is responsible for the phloroglucinol moiety.
- This study clarifies the complex metabolic origins of hyperforin.