Characterization and Antimicrobial Studies of Iturin-Like and Bogorol-Like Lipopeptides From Spp. Strains GI9 and SKDU10

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2021 Nov 16

PMID 34782829

Citations 4

Authors

Shelley Sardul Singh

Deepika Sharma

Piyush Baindara

Stanzin Choksket

Harshvardhan

Santi M Mandal

Vishakha Grover

Suresh Korpole

Affiliations

Soon will be listed here.

Abstract

Accession numbers for whole-genome sequence of sp. strain GI9 and SKDU10 are CAGD01000001 to CAGD01000061 and LSSO00000000, respectively. Members of the genus 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 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 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 experiments, thereby exhibited potential use in biotechnological industry as effective biocontrol agents.

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