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Isolation and characterization of an antimicrobial lipopeptide produced by Paenibacillus ehimensis MA2012
Author(s) -
Naing Kyaw Wai,
Lee Yong Seong,
Nguyen Xuan Hoa,
Jeong Min Hae,
Anees Muhammad,
Oh Byeong Seok,
Cho Jeong Yong,
Moon Jae Hak,
Kim Kil Yong
Publication year - 2015
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201400505
Subject(s) - lipopeptide , antimicrobial , chemistry , mass spectrometry , moiety , hypha , microbiology and biotechnology , bacteria , tandem mass spectrometry , peptide , amino acid , biology , stereochemistry , chromatography , biochemistry , genetics
In this study, a novel lipopeptide antibiotic was isolated from the culture supernatant of Paenibacillus ehimensis strain MA2012. After analyses by mass spectrometry (MS), nuclear magnetic resonance (NMR), and high resolution mass spectrometry (HR‐MS/MS) the compound was identified to be polypeptin C consisting of 3‐hydroxy‐4‐methyl‐hexanoic acid moiety and nine amino acids as peptide body. It has the same molecular mass (1115 Da) with that of polypeptin A and B but the amino acid positions differ. A relatively low concentration (125 ppm) of polypeptin C lowered the surface tension of water from 72.2 to 36.4 mN/m. It showed antimicrobial activity against several plant pathogenic bacteria and fungi. When the polypeptin C was applied to the ripe pepper fruits previously inoculated with conidia of Colletotrichum gloeosporioides , the hyphal growth on the fruit was significantly suppressed. Moreover, the hyphal morphology of C. gloeosporioides was greatly affected by the purified compound. All these data suggest the great potential of P. ehimensis MA2012 to control plant fungal and bacterial diseases.