Bioactive non-ribosomal peptides and polyketides from entomopathogenic fungi for pest and pathogen control

Overview

This solution centers on non-ribosomal peptides and polyketide compounds produced by the entomopathogenic fungus Beauveria pseudobassiana strain RGM 2184. These secondary metabolites have demonstrated the ability to suppress insect defense systems, kill insect pests, and prevent the spread of opportunistic microorganisms. The approach provides a biologically derived alternative or complement to conventional chemical pesticides, supporting integrated pest management strategies in agriculture and potentially in public health vector control.

Technical specifications

• Fungal strain: Beauveria pseudobassiana RGM 2184, characterized through genomic analysis revealing non-ribosomal peptide synthetases and previously undescribed polyketide synthases.
• Bioactive compound classes: Non-ribosomal peptides and polyketides with insecticidal and antimicrobial activity.
• Mechanism of action: Suppression of insect immune defenses, direct insecticidal effects, and inhibition of opportunistic microbial growth.
• Validation evidence: Culture supernatant extract of strain RGM 2184 produced 79% mortality in Galleria mellonella larvae within 28 days after inoculation, demonstrating strong in vivo bioactivity.
• Discovery platform: Genome-driven identification of biosynthetic gene clusters enables targeted isolation and characterization of novel bioactive molecules.

Technology readiness level

The research is at an early discovery-to-proof-of-concept stage. Genomic characterization of strain RGM 2184 has confirmed the genetic capacity to produce non-ribosomal peptides and polyketides, and preliminary bioassays using culture supernatant extracts have demonstrated significant insecticidal activity against Galleria mellonella larvae. Further work is needed to purify individual compounds, establish structure-activity relationships, scale production, and validate efficacy under field conditions against target agricultural pests.