Keanumycins – Antifungal and Amoebicidal Natural Compounds for Agricultural Biocontrol

Reference Number TO 10-00127

Keywords

nonribosomal peptides (NRPs), keanumycin, biocontrol agents, ecological engineering, antifungal, amoebicidal

Invention Novelty

This invention provides keanumycins, a novel class of non-ribosomal lipopeptides derived from a strain of Pseudomonas nunensis. These compounds demonstrate strong antifungal and amoebicidal properties with minimal cytotoxicity, making them an excellent starting point for developing new antimycotics. Keanumycins hold promise for enhancing crop resistance to phytopathogens and soil-borne pests by contributing to the creation of suppressive soils.

Value Proposition

The overuse of anti-infectives in healthcare, livestock, and agriculture has caused a global rise in antimicrobial resistance. This has led to a crisis with serious socioeconomic impacts due to the prevalence of multidrug-resistant pathogens. There is an urgent need for new treatment options in stockbreeding and plant agriculture that do not rely on antimicrobials used in human medicine, and for new active moieties and compounds to combat increasing antibiotic resistance. Furthermore, there is a growing demand for sustainable and eco-friendly pest management solutions in agriculture.

Potential for ecofriendly pest management

Technology Description

Disclosed are the recently discovered keanumycins, nonribosomal lipopeptides, which are produced by a biosynthetic gene cluster identified and isolated from Pseudomonas nunensis. Keanumycins have been structurally elucidated and confirmed to have potent activity against amoeba like Acanthamoeba spec. and fungi including Candida spp.,Sporobolomyces salmonicolor, or Penicillium notatum. Keanumycins act by interfering with the viability and propagation of the pathogens by compromising the pathogen´s cell wall, thereby offering a natural means of controlling soil-borne pests. The well-characterized biosynthetic gene cluster can potentially be manipulated or transferred to other microbial hosts for enhanced production and application.

Commercial Opportunity

This technology presents significant commercial opportunities in the agricultural sector, particularly in the development of biocontrol agents for soil health management. The fermentation broth of the keanumycins producing organism can be applied directly to plants to prevent the development of diseases such as Botrytis blight or soybean rust and has the potential to develop an environmentally friendly alternative to antifungal agrochemicals. The technology is available for co-development and licensing.

Development Status

The peptides have been structurally elucidated and tested in functional assays. Further development is focused on optimizing production and conducting field trials for commercial application.