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Biosynthesis of marcfortine A
M S Kuo1, V H Wiley, J I Cialdella
1Pharmacia & Upjohn Inc., Kalamazoo, Michigan, USA.
The Journal of Antibiotics
|October 1, 1996
Summary
Marcfortine A (MA) biosynthesis is elucidated, revealing its origin from methionine, tryptophan, lysine, and isoprene units derived from acetic acid. The study establishes the complete biosynthetic pathway for MA, including its pipecolic acid component.
Area of Science:
- Biochemistry
- Natural Product Biosynthesis
- Metabolic Pathways
Background:
- Marcfortine A (MA) is a complex alkaloid with an incompletely understood biosynthetic origin.
- Understanding the biosynthesis of natural products like MA is crucial for chemical biology and drug discovery.
Purpose of the Study:
- To elucidate the complete biosynthetic pathway of marcfortine A (MA).
- To identify the precursor molecules and metabolic routes involved in MA formation.
Main Methods:
- Utilized 13C labeling experiments to trace the incorporation of specific metabolites.
- Analyzed the 13C enrichment patterns in the final MA structure, particularly the pipecolic acid moiety.
Main Results:
- Marcfortine A (MA) is biosynthesized from methionine, tryptophan, and lysine.
- Two isoprene units within MA are derived from acetic acid.
- The pipecolic acid moiety of MA originates from lysine via alpha-ketoglutarate.
Conclusions:
- The complete carbon-atom biogenesis of marcfortine A (MA) has been accounted for.
- The biosynthetic pathway for the pipecolic acid moiety of MA has been definitively established.
- This study provides a comprehensive understanding of MA's formation at the molecular level.