Antifungal activity improved by coproduction of cyclodextrins and anabaenolysins in Cyanobacteria

Tania K. Shishido , Jouni Jokela, Clara-Theresia Kolehmainen, David P. Fewer, Matti Wahlsten, Hao Wang, Leo Rouhiainen, Ermanno Rizzi, Gianluca De Bellis, Perttu Permi, Kaarina Sivonen

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review


Cyclodextrins are cyclic oligosaccharides widely used in the pharmaceutical industry to improve drug delivery and to increase the solubility of hydrophobic compounds. Anabaenolysins are lipopeptides produced by cyanobacteria with potent lytic activity in cholesterol-containing membranes. Here, we identified the 23- to 24-kb gene clusters responsible for the production of the lipopeptide anabaenolysin. The hybrid nonribosomal peptide synthetase and polyketide synthase biosynthetic gene cluster is encoded in the genomes of three anabaenolysin-producing strains of Anabaena. We detected previously unidentified strains producing known anabaenolysins A and B and discovered the production of new variants of anabaenolysins C and D. Bioassays demonstrated that anabaenolysins have weak antifungal activity against Candida albicans. Surprisingly, addition of the hydrophilic fraction of the whole-cell extracts increased the antifungal activity of the hydrophobic anabaenolysins. The fraction contained compounds identified by NMR as α-, β-, and γ-cyclodextrins, which undergo acetylation. Cyclodextrins have been used for decades to improve the solubility and bioavailability of many drugs including antifungal compounds. This study shows a natural example of cyclodextrins improving the solubility and efficacy of an antifungal compound in an ancient lineage of photosynthetic bacteria.
TidskriftProceedings of the National Academy of Sciences of the United States of America
Sidor (från-till)13669-13674
Antal sidor6
StatusPublicerad - 2015
MoE-publikationstypA1 Tidskriftsartikel-refererad


  • 1183 Växtbiologi, mikrobiologi, virologi

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