Kannurin, a Novel Lipopeptide from Bacillus Cereus Strain AK1: Isolation, Structural Evaluation and Antifungal Activities
Publication Type:Journal Article
Source:Journal of Applied Microbiology, Volume 115, Number 6, p.1287–1296 (2013)
Keywords:Bacillus cereus, Biofilms, Cryptococcus neoformans, ESI-MS, lipopeptide, melanin
<p>Aim This study was performed to isolate and characterize novel antifungal lipopeptide from Bacillus cereus. Methods and Results Elucidation of its chemical structure was carried out by electrospray ionization mass spectra (ESI-MS) and Fourier transform infrared spectroscopy (FT-IR). The compound is a cyclic heptapeptide and composed of amino acids, Leu–Asp–Val–Leu–Leu–Leu–Leu. The in vitro activity of Kannurin against various pathogenic yeasts was assessed by CLSI M27-A and moulds by M38-A. It demonstrated broad-spectrum, fungicidal activity against clinically relevant yeasts and moulds. Kannurin exhibited low haemolytic activity and remained active over a wide pH and temperature range. In addition, Kannurin did not bind with melanin particles and was as active in inhibiting biofilms. Conclusions An antifungal surfactin-like lipopeptide produced by Bacillus cereus strain AK1 was purified and chemically characterized. We propose to name this lipopeptide compound ‘Kannurin’. To our knowledge, this is the first report of Bacillus cereus producing surfactin-like lipopeptide antibiotic with stronger antifungal activity. Significance and Impact of the Study Our results provide a valuable contribution towards a better understanding of the lipopeptide of Bacillus cereus. Moreover, it raises the possibility of using as an alternative antibiotic in clinical medicine.</p>
cited By (since 1996)0
Cite this Research Publication
Related Research Publications
- Identification and characterization of a library of surfactins and fengycins from a marine endophytic Bacillus sp.
- Surfactin, Iturin, and Fengycin Biosynthesis by Endophytic Bacillus sp. from Bacopa monnieri.
- Mass Spectrometric Characterization of a Novel Antimicrobial Peptide Isolated from Clitoria Ternatea
- Phosphoproteome of Cryptococcus neoformans
- Evidence of genotypic diversity among Candida auris isolates by multilocus sequence typing, matrix-assisted laser desorption ionization time-of-flight mass spectrometry and amplified fragment length polymorphism.