Macrolides from rare actinomycetes: Structures and bioactivities

Area of Science:

• Microbiology
• Natural Products Chemistry
• Pharmacology

Background:

• Rare actinomycetes are prolific producers of diverse secondary metabolites.
• Macrolides are a significant class of these metabolites, known for various biological activities.
• Previous research has identified numerous macrolides from actinomycetes, but rare genera remain underexplored.

Purpose of the Study:

• To review the bioactivities and representative structures of macrolides derived from rare actinomycetes.
• To identify promising macrolide classes for potential therapeutic applications.
• To consolidate information on macrolides from genera like Micromonospora, Saccharothrix, Amycolatopsis, Nocardiopsis, and Catenulispora.

Main Methods:

• Literature review of scientific databases.
• Analysis of published data on macrolide structures and bioactivities.
• Categorization of macrolides based on their source genus and biological effects.

Main Results:

• Twenty-six groups of macrolides from rare actinomycetes were identified and analyzed.
• Key macrolide groups with broad bioactivities include ammocidins, bafilomycins, neomaclafungins, rosaramicins, spinosyns, and tiacumicins.
• These macrolides exhibit a wide spectrum of activities: cytotoxic, antibacterial, antifungal, antimicrobial, insecticidal, anti-trypanosomal, antimalarial, antiprotozoal, antimycobacterial, and anti-herpetic.

Conclusions:

• Macrolides from rare actinomycetes possess diverse and potent bioactivities, making them valuable candidates for drug discovery.
• Genera such as Micromonospora are particularly rich sources of these compounds.
• Further investigation into these macrolides is warranted for their potential future applications in medicine.