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Complexity of fungal polyketide biosynthesis and function.

Maria C Stroe1, Jia Gao1, Michael Pitz1

  • 1Department of Microbiology, Institute for Applied Biosciences, Karlsruhe Institute of Technology (KIT) - South Campus, Karlsruhe, Germany.

Molecular Microbiology
|November 14, 2023
PubMed
Summary

Microbial secondary metabolites (SMs) are crucial in natural environments, despite being dispensable for growth. Research reveals complex polyketide biosynthesis pathways and hidden potential in fungal genomes.

Keywords:
Alternaria alternataAspergillus nidulansantibioticmycotoxinpolyketidesecondary metabolites

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Area of Science:

  • Microbiology
  • Biochemistry
  • Genomics

Background:

  • Microbial secondary metabolites (SMs) were initially considered non-essential for organism growth.
  • However, SMs play vital roles in natural environments and have significant applications for humans.
  • Polyketides, a class of SMs, include well-known compounds like aflatoxin.

Purpose of the Study:

  • To explore the complexity of polyketide biosynthesis pathways.
  • To investigate the potential of 'sleeping' genes in fungal genomes for SM production.
  • To understand the ecological functions of polyketides.

Main Methods:

  • Analysis of gene clusters involved in polyketide biosynthesis.
  • Genomic analysis to identify hidden SM biosynthetic potential.
  • Studies on organismic interactions to determine ecological roles.

Main Results:

  • Polyketide biosynthesis exhibits significant complexity, deviating from simple gene cluster models.
  • Fungal genomes harbor substantial, previously uncharacterized SM biosynthetic capabilities.
  • Emerging evidence suggests ecological functions for polyketides in producing fungi.

Conclusions:

  • The biosynthesis of polyketides is more intricate than previously assumed.
  • Fungal genomes represent a rich resource for discovering novel SMs.
  • Understanding the ecological roles of SMs is crucial for their study.