Antifungal peptidic compound from the deep-sea bacterium <Emphasis Type="Italic">Aneurinibacillus</Emphasis> sp. YR247 |
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Authors: | Atsushi Kurata Yuto Yamaura Takumi Tanaka Chiaki Kato Kaoru Nakasone Noriaki Kishimoto |
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Institution: | 1.Faculty of Agriculture,Kindai University,Nara City,Japan;2.Department of Marine Biodiversity Research,Japan Agency for Marine-Earth Science and Technology (JAMSTEC),Yokosuka,Japan;3.Faculty of Engineering,Kindai University,Higashi-Hiroshima City,Japan |
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Abstract: | Aneurinibacillus: sp. YR247 was newly isolated from the deep-sea sediment inside the Calyptogena community at a depth of 1171 m in Sagami Bay. The strain exhibited antifungal activity against the filamentous fungus Aspergillus brasiliensis NBRC9455. A crude extract prepared from the YR247 cells by ethanol extraction exhibited broad antimicrobial activities. The antifungal compound is stable at 4–70?°C and pH 2.0–12.0. After treatment with proteinase K, the antifungal activity was not detected, indicating that the antifungal compound of strain YR247 is a peptidic compound. Electrospray ionization mass spectrometry of the purified antifungal compound indicated that the peptidic compound has an average molecular weight of 1167.9. The molecular weight of the antifungal compound from strain YR247 is different from those of antimicrobial peptides produced by the related Aneurinibacillus and Bacillus bacteria. The antifungal peptidic compound from the deep-sea bacterium Aneurinibacillus sp. YR247 may be useful as a biocontrol agent. |
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