Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Genome Mining and Heterologous Expression of Lipoamides and Amicoumacins From Compost-Associated Bacillus subtilis fmb60

Version 1 : Received: 2 March 2021 / Approved: 3 March 2021 / Online: 3 March 2021 (14:08:28 CET)

A peer-reviewed article of this Preprint also exists.

Yang, J.; Zhu, Q.; Xu, F.; Yang, M.; Du, H.; Bian, X.; Lu, Z.; Lu, Y.; Lu, F. Genome Mining, Heterologous Expression, Antibacterial and Antioxidant Activities of Lipoamides and Amicoumacins from Compost-Associated Bacillus subtilis fmb60. Molecules 2021, 26, 1892. Yang, J.; Zhu, Q.; Xu, F.; Yang, M.; Du, H.; Bian, X.; Lu, Z.; Lu, Y.; Lu, F. Genome Mining, Heterologous Expression, Antibacterial and Antioxidant Activities of Lipoamides and Amicoumacins from Compost-Associated Bacillus subtilis fmb60. Molecules 2021, 26, 1892.

Journal reference: Molecules 2021, 26, 1892
DOI: 10.3390/molecules26071892

Abstract

Abstract: Bacillus subtilis fmb60, which has broad-spectrum antimicrobial activities was isolated from plant straw compost. A hybrid NRPS/PKS cluster was screened from the genome. Sixteen secondary metabolites produced by the gene cluster were isolated and identified using LC-HRMS and NMR. Three lipoamides D–F (1-3) and two amicoumacin derivatives, amicoumacins D, E (4, 5), were identified, and are reported here for the first time. Lipoamides D–F exhibited strong antibacterial activities against harmful foodborne bacteria, with the MIC ranging from 6.25 to 25 µg/mL. Amicoumacin E scavenged 38.8% of ABTS+ radicals at 1 mg/mL. Direct cloning and heterologous expression of the NRPS/PKS and ace gene cluster identified its importance for the biosynthesis of amicoumacins. This study demonstrated that there is a high potential for biocontrol utilization of B. subtilis fmb60, and genome mining for clusters of secondary metabolites of B. subtilis fmb60 has revealed a greater biosynthetic potential for the production of novel natural products than previously anticipated.

Keywords

Bacillus subtilis; NRPS/PKS; amicoumacins; heterologous expression; bioactivities

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