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Case Studies in Molecular Network-Guided Marine Biodiscovery.

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Mass spectrometry (MS/MS) molecular networking accelerates the discovery of novel marine sponge natural products. This technique identified rare indole alkaloids and unprecedented classes of compounds, including sesquiterpenes and sesterterpenes.

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Area of Science:

  • Marine Natural Products Chemistry
  • Analytical Chemistry
  • Biotechnology

Background:

  • Marine sponges are a rich source of diverse bioactive natural products.
  • Traditional methods for natural product discovery can be limited in identifying novel compounds.
  • Mass spectrometry/mass spectrometry (MS/MS) molecular networking offers advanced capabilities for natural product exploration.

Purpose of the Study:

  • To highlight the benefits and lessons learned from applying MS/MS molecular networking in marine sponge natural product research.
  • To showcase the utility of molecular networking in discovering new natural products and classes of compounds.
  • To demonstrate the power of molecular networking in overcoming limitations of other dereplication strategies.

Main Methods:

  • Application of MS/MS molecular networking for dereplication and prioritization of marine sponge extracts.
  • Case study analysis of discoveries including trachycladindoles, dysidealactams, cacolides, and thorectandrins.
  • Comparative analysis of molecular networking against alternate dereplication strategies.

Main Results:

  • Molecular networking facilitated the discovery of numerous new natural products and novel compound classes.
  • Identified trachycladindoles, a rare indole alkaloid class, from *Trachycladus laevispirulifer*.
  • Discovered unprecedented dysidealactams (sesquiterpene glycinyl-lactams/imides) from *Dysidea* sp., cacolides (sesterterpene butenolides) from *Cacospongia* sp., and thorectandrins (indole alkaloids).
  • Revealed new chemical and biological insights into known aplysinopsins through thorectandrin discovery.

Conclusions:

  • MS/MS molecular networking is a powerful and essential tool for discovering novel marine sponge natural products, including new compound classes.
  • This technique overcomes limitations of traditional methods, enabling the identification of compounds that might otherwise be missed or deprioritized.
  • The application of molecular networking provides significant benefits for natural product chemistry, expanding our understanding of marine biodiversity and chemical innovation.