AUTHOR=Singh Shelley Sardul , Sharma Deepika , Baindara Piyush , Choksket Stanzin , Harshvardhan  , Mandal Santi M. , Grover Vishakha , Korpole Suresh 

TITLE=Characterization and Antimicrobial Studies of Iturin-Like and Bogorol-Like Lipopeptides From Brevibacillus spp. Strains GI9 and SKDU10

JOURNAL=Frontiers in Microbiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.729026

DOI=10.3389/fmicb.2021.729026

ISSN=1664-302X

ABSTRACT=<p>Accession numbers for whole-genome sequence of <italic>Brevibacillus</italic> sp. strain GI9 and SKDU10 are <ext-link ext-link-type="DDBJ/EMBL/GenBank" xlink:href="CAGD01000001" xmlns:xlink="http://www.w3.org/1999/xlink">CAGD01000001</ext-link> to <ext-link ext-link-type="DDBJ/EMBL/GenBank" xlink:href="CAGD01000061" xmlns:xlink="http://www.w3.org/1999/xlink">CAGD01000061</ext-link> and <ext-link ext-link-type="DDBJ/EMBL/GenBank" xlink:href="LSSO00000000" xmlns:xlink="http://www.w3.org/1999/xlink">LSSO00000000</ext-link>, respectively. Members of the genus <italic>Brevibacillus</italic> have been demonstrated to produce a variety of bioactive compounds including polyketides, lipopeptides and bacteriocins. Lipopeptides are non-ribosomally synthesized surface-active compounds with antimicrobial, antitumor, and immune-stimulatory activities. They usually exhibit strong antifungal and antibacterial activities and are considered as promising compounds in controlling fungal diseases. In this study, we have characterized two lipopeptides from <italic>Brevibacillus</italic> sp. strains GI9 and SKDU10. The corresponding lipopeptides were purified by reverse-phase high-performance liquid chromatography. Mass analysis and characterization by MALDI-TOF-MS (Matrix-assisted laser desorption ionization time-of-flight mass spectrometry) analysis revealed production of an iturin-like lipopeptide by strain GI9 and bogorol-like lipopeptide by strain SKDU10. Both lipopeptides exhibited broad spectrum antibacterial activity and inhibited the growth of various fungi. They showed minimum inhibitory concentration (MIC) values between 90 and 300 μg/ml against indicator strains of bacteria and drug-resistant <italic>Candida</italic> indicator strains. The lipopeptides did not show phytotoxic effect in seed germination experiments but caused hemolysis. Further, both lipopeptides inhibited the growth of fungi on fruits and vegetables in <italic>in vitro</italic> experiments, thereby exhibited potential use in biotechnological industry as effective biocontrol agents.</p>