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Liu Y, Han S, Song L, Li L, Wang H, Pan M, Tan J. Screening of bacterial endophytes of larch against Neofusicoccum laricinum and validation of their safety. Microbiol Spectr 2024; 12:e0411223. [PMID: 38912806 PMCID: PMC11302231 DOI: 10.1128/spectrum.04112-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 05/14/2024] [Indexed: 06/25/2024] Open
Abstract
In order to provide a highly feasible research pathway for the control of larch shoot blight, healthy larch branches and leaves were collected from 13 sampling sites in 8 provinces in China. The antagonistic endophytic bacteria obtained from the screening were used to carry out disease control experiments in potted seedlings. The safety evaluation test was conducted on the antagonistic bacteria. Subsequently, the strains with better preventive effect and high safety were identified by morphological and molecular methods. A total of 391 strains of endophytic bacteria were isolated from healthy larch branches and leaves. Seventy-eight strains of larch endophytic bacteria with antagonistic effect were obtained by primary sieving. Ten strains of endophytic bacteria with obvious antagonism were further obtained by secondary sieving, and all of them had an inhibition rate of more than 57%. Among them, strains YN 2, JL 6, NMG 23, and JL 54 showed the highest inhibition rate of 63.16%-65.08%, which was significantly different from the other treatments. The results of the pot test showed that 14 days after inoculation with the pathogen, strains YN 2 and JL 54 were more effective in the control of larch shoot blight, with the preventive effects reaching 57.7% and 50.0%, respectively. Strains JL 6 and JL 54 were biologically safe in the safety evaluation test. Therefore, strain JL 54 was selected for identification. It was identified as Bacillus amyloliquefaciens through morphological observation, 16S rDNA sequence, gyrB gene sequence and 16S rDNA-gyrB tandem feature sequence analysis. IMPORTANCE Larch shoot blight is a widely distributed, damaging, and rapidly spreading fungal disease of forest trees that poses a serious threat to larch plantations. Endophytic bacteria have biological effects on host plants against pests and diseases, and they have a growth-promoting effect on plants. In this paper, we investigated for the first time the biocontrol effect of endophytic bacteria on larch shoot blight by screening endophytic bacteria with the function of antagonizing dieback fungi. Bacillus amyloliquefaciens JL 54 has a better prospect of biocontrol against larch shoot blight, which lays the foundation for the application of this bacterium in the future.
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Affiliation(s)
- Yuqian Liu
- College of Forestry and Grassland, Collaborative Innovation Center of Modern Forestry in South China, Nanjing Forestry University, Nanjing, China
| | - Shengjie Han
- College of Forestry and Grassland, Collaborative Innovation Center of Modern Forestry in South China, Nanjing Forestry University, Nanjing, China
| | - Liwen Song
- Jilin Provincial Academy of Forestry Science, Changchun, China
| | - Limei Li
- Jilin Provincial Academy of Forestry Science, Changchun, China
| | - Haifeng Wang
- Forestry Bureau of Dunhua City, Jilin Province, Dunhua, China
| | - Min Pan
- College of Forestry and Grassland, Collaborative Innovation Center of Modern Forestry in South China, Nanjing Forestry University, Nanjing, China
| | - Jiajin Tan
- College of Forestry and Grassland, Collaborative Innovation Center of Modern Forestry in South China, Nanjing Forestry University, Nanjing, China
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Tang Z, Wang L, Xiong Z, Zhu Y, Zhang H. Process optimized for production of iturin A in biofilm reactor by Bacillus velezensis ND. Bioprocess Biosyst Eng 2024; 47:1095-1105. [PMID: 38847888 DOI: 10.1007/s00449-024-03038-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 05/23/2024] [Indexed: 06/29/2024]
Abstract
In this research, to provide an optimal growth medium for the production of iturin A, the concentrations of key amino acid precursors were optimized in shake flask cultures using the response surface method. The optimized medium were applied in a biofilm reactor for batch fermentation, resulting in enhanced production of iturin A. On this basis, a step-wise pH control strategy and a combined step-wise pH and temperature control strategy were introduced to further improve the production of iturin A. Finally, the fed-batch fermentation was performed based on combined step-wise pH and temperature control. The titer and productivity of iturin A reached 7.86 ± 0.23 g/L and 65.50 ± 1.92 mg/L/h, respectively, which were 37.65 and 65.20% higher than that before process optimization.
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Affiliation(s)
- Zhongmin Tang
- College of Life Sciences, Shihezi University, Xinjiang, People's Republic of China
| | - Leiming Wang
- College of Life Sciences, Shihezi University, Xinjiang, People's Republic of China
| | - Zhengjun Xiong
- Sel Biochem Xinjiang Co., Ltd, Xinjiang, People's Republic of China
| | - Yuxia Zhu
- Sel Biochem Xinjiang Co., Ltd, Xinjiang, People's Republic of China
| | - Huili Zhang
- College of Life Sciences, Shihezi University, Xinjiang, People's Republic of China.
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3
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Yuan Y, Chu D, Fan J, Cui Z, Wang R, Zhang H, You X, Li Y, Wang X. Production of antifungal iturins from vegetable straw: A combined chemical-bacterial process. BIORESOURCE TECHNOLOGY 2023; 378:129010. [PMID: 37011842 DOI: 10.1016/j.biortech.2023.129010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
A combined chemical-bacterial process was developed to convert vegetable straw waste to high value antifungal iturins. Straws from three widely cultivated vegetable (cucumber, tomato and pepper) were evaluated as feedstocks for iturin production. Microwave assisted hydrolysis with very dilute acid (0.2% w/w H2SO4) achieved efficient reducing sugar recovery. The high glucose concentration in non-detoxified hydrolysate from pepper straw facilitated the optimal growth of Bacillus amyloliquefaciens strain Cas02 and stimulated the production of iturin. The fermentation parameters were optimised to enhance the iturin production efficiency. The obtained fermentation extract was further purified using macroporous adsorption resin, resulting in an iturin-rich extract that exhibited strong antifungal activity against Alternaria alternata with an IC50 of 176.44 μg/mL. Each iturin homologue was identified using NMR. Overall, 1.58 g iturin-rich extract containing 164.06 mg/g iturins was obtained from 100 g pepper straw, illustrating the great potential of valorising pepper straw via this process.
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Affiliation(s)
- Yuan Yuan
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Depeng Chu
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Jiajun Fan
- Green Chemistry Centre of Excellence, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Zhenzhen Cui
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China; Key Laboratory of Tobacco Pest Monitoring & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Rui Wang
- Enshi Tobacco Science and Technology Center, Enshi 445000, China
| | - Han Zhang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiangwei You
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Yiqiang Li
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiaoqiang Wang
- Key Laboratory of Tobacco Pest Monitoring & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
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Yuan T, Qazi IH, Yang P, Zhang X, Li J, Liu J. Analysis of endophytic bacterial flora of mulberry cultivars susceptible and resistant to bacterial wilt using metagenomic sequencing and culture-dependent approach. World J Microbiol Biotechnol 2023; 39:163. [PMID: 37067654 DOI: 10.1007/s11274-023-03599-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/30/2023] [Indexed: 04/18/2023]
Abstract
Endophytes have a wide range of potential in maintaining plant health and sustainable agricultural environmental conditions. In this study, we analysed the diversity of endophytic bacteria in four mulberry cultivars with different resistance capacity against bacterial wilt using metagenomic sequencing and culture-dependent approaches. We further assessed the role of 11 shared genera in the control of bacterial wilt of mulberry. The results of the present study showed that Actinobacteria, Firmicutes, and Proteobacteria were the three dominant phyla in all communities, with the representative genera Acinetobacter and Pseudomonas. The diversity analysis showed that the communities of the highly and moderately resistant varieties were more diverse compared to those of the weakly resistant and susceptible varieties. The control tests of mulberry bacterial wilt showed that Pantoea, Atlantibacter, Stenotrophomonas, and Acinetobacter were effective, with a control rate of over 80%. Microbacterium and Kosakonia were moderately effective, with a control rate between 50 and 80%. At the same time, Escherichia, Lysinibacillus, Pseudomonas, and Rhizobium were found to be less effective, with a control rate of less than 40%. In conclusion, this study provides a reasonable experimental reference data for the control of bacterial wilt of mulberry.
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Affiliation(s)
- Ting Yuan
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China
| | - Izhar Hyder Qazi
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China
- Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand, 67210, Pakistan
| | - Peijia Yang
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China
| | - Xueyin Zhang
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China
| | - Jinhao Li
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China
| | - Jiping Liu
- College of Animal Science, Regional Sericulture Training Center For Asia-Pacific, South China Agriculture University, Wushan Road, Guangzhou, 510642, Guangdong, China.
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5
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Sreedharan SM, Rishi N, Singh R. Microbial Lipopeptides: Properties, Mechanics and Engineering for Novel Lipopeptides. Microbiol Res 2023; 271:127363. [PMID: 36989760 DOI: 10.1016/j.micres.2023.127363] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 12/04/2022] [Accepted: 03/11/2023] [Indexed: 03/17/2023]
Abstract
Microorganisms produce active surface agents called lipopeptides (LPs) which are amphiphilic in nature. They are cyclic or linear compounds and are predominantly isolated from Bacillus and Pseudomonas species. LPs show antimicrobial activity towards various plant pathogens and act by inhibiting the growth of these organisms. Several mechanisms are exhibited by LPs, such as cell membrane disruption, biofilm production, induced systematic resistance, improving plant growth, inhibition of spores, etc., making them suitable as biocontrol agents and highly advantageous for industrial utilization. The biosynthesis of lipopeptides involves large multimodular enzymes referred to as non-ribosomal peptide synthases. These enzymes unveil a broad range of engineering approaches through which lipopeptides can be overproduced and new LPs can be generated asserting high efficacy. Such approaches involve several synthetic biology systems and metabolic engineering techniques such as promotor engineering, enhanced precursor availability, condensation domain engineering, and adenylation domain engineering. Finally, this review provides an update of the applications of lipopeptides in various fields.
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Zhang H, Wu J, Wang J, Xiao S, Zhao L, Yan R, Wu X, Wang Z, Fan L, Jin Y. Novel Isoindolinone-Based Analogs of the Natural Cyclic Peptide Fenestin A: Synthesis and Antitumor Activity. ACS Med Chem Lett 2022; 13:1118-1124. [PMID: 35859879 DOI: 10.1021/acsmedchemlett.2c00149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Small- and medium-sized cyclopeptides have been found to have extensive bioactivities and have drawn much attention from medicinal chemists. In the work described in this paper, various cyclic peptide analogs of Fenestin A were synthesized by intramolecular photoinduced electron-transfer cyclization reactions to study the influence of slight structural changes on the bioactivity of small cyclopeptides. The incorporation of thiazole and rigid isoindolinone fragments was found to improve the bioactivity of the cyclopeptide. Detailed in vitro studies of the apoptosis mechanism, mitochondrial membrane potential, cell cycle, intracellular Ca2+ concentration, and lactate dehydrogenase activity following treatment with a cyclopeptide showed that the cyclopeptide could induce apoptosis of tumor cells and lead to cycle arrest in the G2/M phase. The research also suggested that the photoinduced reaction could be applied to construct cyclic peptides stereoselectively, and the introduction of rigid fragments could enhance the biological activity of cyclopeptide drugs.
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Affiliation(s)
- Huanli Zhang
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Jingwan Wu
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Jingchun Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Shimei Xiao
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Lei Zhao
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Rui Yan
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Xiaodan Wu
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Zhiqiang Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
| | - Li Fan
- Institute of Medicine and Drug Research, Qiqihar Medical University, Qiqihar 161006, P. R. China
| | - Yingxue Jin
- Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
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7
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Lipopeptide Biosurfactants from Bacillus spp.: Types, Production, Biological Activities, and Applications in Food. J FOOD QUALITY 2022. [DOI: 10.1155/2022/3930112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biosurfactants are a functionally and structurally heterogeneous group of biomolecules produced by multiple filamentous fungi, yeast, and bacteria, and characterized by their distinct surface and emulsifying ability. The genus Bacillus is well studied for biosurfactant production as it produces various types of lipopeptides, for example, lichenysins, bacillomycin, fengycins, and surfactins. Bacillus lipopeptides possess a broad spectrum of biological activities such as antimicrobial, antitumor, immunosuppressant, and antidiabetic, in addition to their use in skincare. Moreover, Bacillus lipopeptides are also involved in various food products to increase the antimicrobial, surfactant, and emulsification impact. From the previously published articles, it can be concluded that biosurfactants have strong potential to be used in food, healthcare, and agriculture. In this review article, we discuss the versatile functions of lipopeptide Bacillus species with particular emphasis on the biological activities and their applications in food.
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8
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Wan C, Fan X, Lou Z, Wang H, Olatunde A, Rengasamy KRR. Iturin: cyclic lipopeptide with multifunction biological potential. Crit Rev Food Sci Nutr 2022; 62:7976-7988. [PMID: 33983074 DOI: 10.1080/10408398.2021.1922355] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Iturin, a metabolite produced by Bacillus subtilis, has a broad-spectrum antibacterial effect, and because they are secreted in the rhizosphere of plants, iturins are often mixed with many organic molecules. In recent years, people have improved their separation and purification methods but still cannot achieve simple and effective procedures, making Iturins an ideal biological control agent for insects and bacteria; commercial value still cannot be realized. With the in-depth studies of Iturins, its anti-cancer, hemolysis and other biological activities have gradually been discovered. This article reviews the branches of the Iturin family, structural features of these metabolite, separation and purification methods used for producing it, culture optimization, and various biological activities of the Iturin family, such as insecticidal, antibacterial, hemolytic and anticarcinogenic properties, among others have been summarized. Furthermore, this review revealed some commercial applications of Iturins and their relevance in research works. For example, in food packaging, clean water has good development potential.This can promote the commercial application of Iturins instead of other chemical and biological control agents that are environmentally friendly, pollution-free and have no side effects on humans. Furthermore, work documented anticancer, hemolytic and other biological activities of Iturin.
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Affiliation(s)
- Chunpeng Wan
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xiaoyuan Fan
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Zaixiang Lou
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Hongxin Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Ahmed Olatunde
- Department of Biochemistry, Abubakar Tafawa Balewa University, Bauchi, Nigeria
| | - Kannan R R Rengasamy
- Green Biotechnologies Research Centre of Excellence, University of Limpopo, Mankweng, South Africa
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Sharma J, Sundar D, Srivastava P. Biosurfactants: Potential Agents for Controlling Cellular Communication, Motility, and Antagonism. Front Mol Biosci 2021; 8:727070. [PMID: 34708073 PMCID: PMC8542798 DOI: 10.3389/fmolb.2021.727070] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/02/2021] [Indexed: 12/29/2022] Open
Abstract
Biosurfactants are surface-active molecules produced by microorganisms, either on the cell surface or secreted extracellularly. They form a thin film on the surface of microorganisms and help in their detachment or attachment to other cell surfaces. They are involved in regulating the motility of bacteria and quorum sensing. Here, we describe the various types of biosurfactants produced by microorganisms and their role in controlling motility, antagonism, virulence, and cellular communication.
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Affiliation(s)
| | - Durai Sundar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Preeti Srivastava
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
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10
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Singh P, Xie J, Qi Y, Qin Q, Jin C, Wang B, Fang W. A Thermotolerant Marine Bacillus amyloliquefaciens S185 Producing Iturin A5 for Antifungal Activity against Fusarium oxysporum f. sp. cubense. Mar Drugs 2021; 19:md19090516. [PMID: 34564178 PMCID: PMC8472358 DOI: 10.3390/md19090516] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/06/2021] [Accepted: 09/08/2021] [Indexed: 11/16/2022] Open
Abstract
Fusarium wilt of banana (also known as Panama disease), is a severe fungal disease caused by soil-borne Fusarium oxysporum f. sp. cubense (Foc). In recent years, biocontrol strategies using antifungal microorganisms from various niches and their related bioactive compounds have been used to prevent and control Panama disease. Here, a thermotolerant marine strain S185 was identified as Bacillus amyloliquefaciens, displaying strong antifungal activity against Foc. The strain S185 possesses multiple plant growth-promoting (PGP) and biocontrol utility properties, such as producing indole acetic acid (IAA) and ammonia, assimilating various carbon sources, tolerating pH of 4 to 9, temperature of 20 to 50 °C, and salt stress of 1 to 5%. Inoculation of S185 colonized the banana plants effectively and was mainly located in leaf and root tissues. To further investigate the antifungal components, compounds were extracted, fractionated, and purified. One compound, inhibiting Foc with minimum inhibitory concentrations (MICs) of 25 μg/disk, was identified as iturin A5 by high-resolution electrospray ionization mass spectrometry (HR-ESI-MS) and nuclear magnetic resonance (NMR). The isolated iturin, A5, resulted in severe morphological changes during spore germination and hyphae growth of Foc. These results specify that B. amyloliquefaciens S185 plays a key role in preventing the Foc pathogen by producing the antifungal compound iturin A5, and possesses potential as a cost-effective and sustainable biocontrol strain for Panama disease in the future. This is the first report of isolation of the antifungal compound iturin A5 from thermotolerant marine B. amyloliquefaciens S185.
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Affiliation(s)
- Pratiksha Singh
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
| | - Jin Xie
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
| | - Yanhua Qi
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
| | - Qijian Qin
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
| | - Cheng Jin
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
- National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Bin Wang
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
- National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China
- Correspondence: (B.W.); (W.F.)
| | - Wenxia Fang
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning 530007, China; (P.S.); (J.X.); (Y.Q.); (Q.Q.); (C.J.)
- National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning 530007, China
- Correspondence: (B.W.); (W.F.)
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11
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Zeng Y, Liu H, Zhu T, Han S, Li S. Preparation of Nanomaterial Wettable Powder Formulations of Antagonistic Bacteria from Phellodendron chinense and the Biological Control of Brown Leaf Spot Disease. THE PLANT PATHOLOGY JOURNAL 2021; 37:215-231. [PMID: 34111912 PMCID: PMC8200580 DOI: 10.5423/ppj.oa.02.2021.0020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/15/2021] [Accepted: 03/22/2021] [Indexed: 06/02/2023]
Abstract
Brown leaf spot disease caused by Nigrospora guilinensis on Phellodendron chinense occurs in a large area in Dayi County, Chengdu City, Sichuan Province, China each year. This outbreak has severely reduced the production of Chinese medicinal plants P. chinense and caused substantial economic losses. The bacterial isolate JKB05 was isolated from the healthy leaves of P. chinense, exhibited antagonistic effects against N. guilinensis and was identified as Bacillus megaterium. The following fermentation medium and conditions improved the inhibitory effect of B. megaterium JKB05 on N. guilinensis: 2% glucose, 0.1% soybean powder, 0.1% KCl, and 0.05% MgSO4; initial concentration 6 × 106 cfu/ml, and a 42-h optimal fermentation time. A composite of 0.1% nano-SiO2 JKB05 improved the thermal stability, acid-base stability and ultraviolet resistance by 16%, 12%, and 38.9%, respectively, and nano-SiO2 was added to the fermentation process. The best formula for the wettable powder was 35% kaolin, 4% polyethylene glycol, 8% Tween, and 2% humic acid. The following quality test results for the wettable powder were obtained: wetting time 87.0 s, suspension rate 80.33%, frequency of microbial contamination 0.08%, pH 7.2, fineness 95.8%, drying loss 1.47%, and storage stability ≥83.5%. A pot experiment revealed that the ability of JKB05 to prevent fungal infections on P. chinense increased considerably and achieved levels of control as high as 94%. The use of nanomaterials significantly improved the ability of biocontrol bacteria to control this disease.
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Affiliation(s)
- Yanling Zeng
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Han Liu
- Ganzi Institute of Forestry Research, Kangding 626001, China
| | - Tianhui Zhu
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Shan Han
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Shujiang Li
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
- Key Laboratory of National Forestry & Grassland Administration on Forest Resources Conservation and Ecological Safety in the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
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12
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Jeong SY, Son HJ. Effects of mycosubtilin homolog algicides from a marine bacterium, Bacillus sp. SY-1, against the harmful algal bloom species Cochlodinium polykrikoides. J Microbiol 2021; 59:389-400. [PMID: 33779952 DOI: 10.1007/s12275-021-1086-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 02/25/2021] [Accepted: 02/25/2021] [Indexed: 11/28/2022]
Abstract
The marine bacterium, Bacillus sp. SY-1, produced algicidal compounds that are notably active against the bloom-forming alga Cochlodinium polykrikoides. We isolated three algicidal compounds and identified these as mycosubtilins with molecular weights of 1056, 1070, and 1084 (designated MS 1056, 1070, and 1084, respectively), based on amino acid analyses and 1H, 13C, and two-dimensional nuclear magnetic resonance spectroscopy, including 1H-15N heteronuclear multiple bond correlation analysis. MS 1056 contains a β-amino acid residue with an alkyl side chain of C15, which has not previously been seen in known mycosubtilin families. MS 1056, 1070, and 1084 showed algicidal activities against C. polykrikoides with 6-h LC50 values of 2.3 ± 0.4, 0.8 ± 0.2, and 0.6 ± 0.1 μg/ml, respectively. These compounds also showed significant algicidal activities against other harmful algal bloom species. In contrast, MS 1084 showed no significant growth inhibitory effects against other organisms, including bacteria and microalgae, although does inhibit the growth of some fungi and yeasts. These observations imply that the algicidal bacterium Bacillus sp. SY-1 and its algicidal compounds could play an important role in regulating the onset and development of harmful algal blooms in natural environments.
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Affiliation(s)
- Seong-Yun Jeong
- Department of Biomedical, Daegu Catholic University, Gyengsan, 38430, Republic of Korea
| | - Hong-Joo Son
- College of Natural Resources and Life Science, Pusan National University, Miryang, 50463, Republic of Korea.
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Théatre A, Hoste ACR, Rigolet A, Benneceur I, Bechet M, Ongena M, Deleu M, Jacques P. Bacillus sp.: A Remarkable Source of Bioactive Lipopeptides. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2021; 181:123-179. [DOI: 10.1007/10_2021_182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Jiang C, Li Z, Shi Y, Guo D, Pang B, Chen X, Shao D, Liu Y, Shi J. Bacillus subtilis inhibits Aspergillus carbonarius by producing iturin A, which disturbs the transport, energy metabolism, and osmotic pressure of fungal cells as revealed by transcriptomics analysis. Int J Food Microbiol 2020; 330:108783. [PMID: 32659523 DOI: 10.1016/j.ijfoodmicro.2020.108783] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/08/2020] [Accepted: 07/01/2020] [Indexed: 12/24/2022]
Abstract
The contamination of Aspergillus carbonarius causes decreases and great decay of agricultural products, and threatens the human and animal health by producing mycotoxins, especially ochratoxin A. Bacillus subtilis has been proved to efficiently inhibit the growth of A. carbonarius. Revealing the major active compound and the mechanisms for the antifungal of B. subtilis are essential to enhance its antifungal activity and control the quality of antifungal products made of it. In this study, we determined that iturin A is the major compound that inhibits Aspergillus carbonarius, a widespread fungal pathogen of grape and other fruits. Iturin A significantly inhibited growth and ochratoxin A production of A. carbonarius with minimal inhibitory concentrations (MICs) of 10 μg/mL and 0.312 μg/mL, respectively. Morphological observations revealed that iturin A caused swelling of the fungal cells and thinning of the cell wall and membrane at 1/2 MIC, whereas it inhibited fungal spore germination and caused mitochondrial swelling at higher concentrations. A differential transcriptomic analysis indicated that the mechanisms used by iturin A to inhibit A. carbonarius were to downregulate the expression of genes related to cell membrane, transport, osmotic pressure, oxidation-reduction processes, and energy metabolism. Among the down-regulated genes, those related to the transport capacity were most significantly influenced, including the increase of energy-related transport pathways and decrease of other pathways. Notably, the genes related to taurine and hypotaurine metabolism were also decreased, indicating iturin A potentially cause the occurrence of osmotic imbalance in A. carbonarius, which may be the intrinsic cause for the swelling of fungal cells and mitochondria. Overall, iturin A produced by B. subtilis played important roles to inhibit A. carbonarius via changing the fungal cell structure and causing perturbations to energy, transport and osmotic pressure metabolisms in fungi. The results indicated a new direction for researches on the mechanisms for lipopeptides and provided useful information to develop more efficient antifungal agents, which are important to agriculture and biomedicine.
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Affiliation(s)
- Chunmei Jiang
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Zhenzhu Li
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Yihong Shi
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Dan Guo
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Bin Pang
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Xianqing Chen
- Jiaxing Synbiolab Biotechnology Co., Ltd., Jiaxing, Zhejiang Province 314006, China
| | - Dongyan Shao
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China
| | - Yanlin Liu
- College of Enology, Northwest A&F University, 23 Xinong Road, Yangling, Shaanxi Province 712100, China
| | - Junling Shi
- Key Laboratory for Space Bioscience & Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China.
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15
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Fei D, Liu FF, Gang HZ, Liu JF, Yang SZ, Ye RQ, Mu BZ. A new member of the surfactin family produced by Bacillus subtilis with low toxicity on erythrocyte. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.04.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Isolation, Identification and Antimicrobial Evaluation of Bactericides Secreting Bacillus subtilis Natto as a Biocontrol Agent. Processes (Basel) 2020. [DOI: 10.3390/pr8030259] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Herein, a bactericide-secreting Bacillus strain, potentially useful as a biocontrol agent, was isolated from the commercial Yanjing Natto food. Following the biochemical and physiological evaluation, the molecular identification was performed using 16S rDNA sequencing of polymerase chain reaction-amplified DNA that confirmed the natto isolate as Bacillus subtilis natto (B. subtilis natto). The biocontrol (microbial inhibitory) capability of B. subtilis natto was investigated against Staphylococcus aureus, Escherichia coli, Salmonella typhimurium, and yeast (Yarrowia lipolytica) and recorded. The antimicrobial activity of B. subtilis natto was further enhanced by optimizing the growth medium for optimal bactericides secretion. Under optimized conditions, B. subtilis natto exhibited much higher inhibitory activity against S. aureus with a zone of inhibition diameter up to 27 mm. After 48 h incubation, the optimally yielded B. subtilis natto broth was used to extract and purify the responsible bactericides by silica gel column chromatography, gel column chromatography, and semi-preparative high-performance liquid chromatography. Structural identification of purified bactericides (designated as NT-5, NT-6, and NT-7) from B. subtilis natto was performed by 13C-nuclear magnetic resonance (NMR) and mass spectral analyses. The NMR comparison also revealed that NT-5, NT-6, and NT-7 had identical structures, except for the fatty chain. In summary, the present study suggests the improved biocontrol and/or microbial inhibitory potential of newly isolated bactericides secreting B. subtilis natto.
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Lesson from Ecotoxicity: Revisiting the Microbial Lipopeptides for the Management of Emerging Diseases for Crop Protection. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17041434. [PMID: 32102264 PMCID: PMC7068399 DOI: 10.3390/ijerph17041434] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 11/17/2022]
Abstract
Microorganisms area treasure in terms of theproduction of various bioactive compounds which are being explored in different arenas of applied sciences. In agriculture, microbes and their bioactive compounds are being utilized in growth promotion and health promotion withnutrient fortification and its acquisition. Exhaustive explorations are unraveling the vast diversity of microbialcompounds with their potential usage in solving multiferous problems incrop production. Lipopeptides are one of such microbial compounds which havestrong antimicrobial properties against different plant pathogens. These compounds are reported to be produced by bacteria, cyanobacteria, fungi, and few other microorganisms; however, genus Bacillus alone produces a majority of diverse lipopeptides. Lipopeptides are low molecular weight compounds which havemultiple industrial roles apart from being usedas biosurfactants and antimicrobials. In plant protection, lipopeptides have wide prospects owing totheirpore-forming ability in pathogens, siderophore activity, biofilm inhibition, and dislodging activity, preventing colonization bypathogens, antiviral activity, etc. Microbes with lipopeptides that haveall these actions are good biocontrol agents. Exploring these antimicrobial compounds could widen the vistasof biological pest control for existing and emerging plant pathogens. The broader diversity and strong antimicrobial behavior of lipopeptides could be a boon for dealing withcomplex pathosystems and controlling diseases of greater economic importance. Understanding which and how these compounds modulate the synthesis and production of defense-related biomolecules in the plants is a key question—the answer of whichneeds in-depth investigation. The present reviewprovides a comprehensive picture of important lipopeptides produced by plant microbiome, their isolation, characterization, mechanisms of disease control, behavior against phytopathogens to understand different aspects of antagonism, and potential prospects for future explorations as antimicrobial agents. Understanding and exploring the antimicrobial lipopeptides from bacteria and fungi could also open upan entire new arena of biopesticides for effective control of devastating plant diseases.
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Rong S, Xu H, Li L, Chen R, Gao X, Xu Z. Antifungal activity of endophytic Bacillus safensis B21 and its potential application as a biopesticide to control rice blast. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 162:69-77. [PMID: 31836057 DOI: 10.1016/j.pestbp.2019.09.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 08/29/2019] [Accepted: 09/08/2019] [Indexed: 06/10/2023]
Abstract
Endophytic bacteria are potential biocontrol agents for the control of fungal diseases. Here, an endophyte strain, B21, was isolated from Osmanthus fragrans Lour. fruits and identified as Bacillus safensis by analysis of its 16S rDNA gene sequence and its biochemical and physiological characteristics. The culture filtrate showed antifungal activity against Magnaporthe oryzae, which causes rice blast disease, and the IC50 of the methanol extract was 15.56 μg/mL, which was significantly lower than that of carbendazim (25.16 μg/mL). The antifungal activity of the methanol extract was stable at a wide range of pH values (1-9) and temperatures (40-100 °C). Two antifungal compounds were isolated by organic extraction, silica gel column chromatography and high-performance liquid chromatography (HPLC). Based on electrospray ionization mass spectrometry (ESI-MS) and nuclear magnetic resonance spectrometry (NMR) analyses, the structures of the antifungal compounds were identified as iturin A2 and iturin A6. Additionally, the hyphae treated with iturin (iturin A2 or iturin A6) could be stained with the fluorescent dye propidium iodide (PI), indicating that these two compounds inhibited the growth of hyphae by changing the hyphal membrane permeability. In field experiments, spray treatment with fermentation broth resulted in a lower disease index than treatment with carbendazim, as did the culture filtrate. The results suggest that strain B21 and its bioactive compounds have the potential to be developed into a biopesticide for the biocontrol of rice blast.
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Affiliation(s)
- Songhao Rong
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
| | - Hong Xu
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
| | - Lihua Li
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
| | - Rongjun Chen
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
| | - Xiaoling Gao
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
| | - Zhengjun Xu
- Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China; Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China.
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19
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The role of iturin A from B. amyloliquefaciens BUZ-14 in the inhibition of the most common postharvest fruit rots. Food Microbiol 2019; 82:62-69. [DOI: 10.1016/j.fm.2019.01.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 12/23/2018] [Accepted: 01/19/2019] [Indexed: 10/27/2022]
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20
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Zhao H, Zhao X, Lei S, Zhang Y, Shao D, Jiang C, Sun H, Shi J. Effect of cell culture models on the evaluation of anticancer activity and mechanism analysis of the potential bioactive compound, iturin A, produced by Bacillus subtilis. Food Funct 2019; 10:1478-1489. [PMID: 30778489 DOI: 10.1039/c8fo02433b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Two-dimensional (2D) cell culture is widely used to evaluate the potential of food compounds in anticancer activity in vitro. However, 3D culture is rarely used. In this study, we compared the obtained anticancer activity and mechanisms of iturin A, a multiple functional compound produced by Bacillus subtilis, in 2D and 3D cultures of HepG2 cells. 3D culture resulted in a much higher 50% inhibitory concentration (55.26 μM) compared to 2D culture (11.91 μM). Reactive oxygen species accumulation, autophagy, apoptosis characterized by cytochrome c release, high apoptotic protein expression and caspase activation were detected in both 2D and 3D cultures. Induction of paraptosis was also detected in 2D culture and the cytoplasmic vacuoles occurred in large numbers. Compared with 2D culture, 3D culture can simulate the microenvironment in vivo and provide more accurate data. Therefore, 3D culture was recommended for the evaluation of anticancer activity of food compounds towards solid tumors.
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Affiliation(s)
- Haobin Zhao
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi Province 710072, China.
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21
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Daas MS, Acedo JZ, Rosana ARR, Orata FD, Reiz B, Zheng J, Nateche F, Case RJ, Kebbouche-Gana S, Vederas JC. Bacillus amyloliquefaciens ssp. plantarum F11 isolated from Algerian salty lake as a source of biosurfactants and bioactive lipopeptides. FEMS Microbiol Lett 2019; 365:4654845. [PMID: 29186395 DOI: 10.1093/femsle/fnx248] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 11/22/2017] [Indexed: 12/29/2022] Open
Abstract
In this study, we identified a new Bacillus strain isolated from an Algerian salty lake that produces metabolites that are active against Gram-positive and Gram-negative bacteria, as well as fungal pathogens. The draft genome sequence of the strain is presented herein. Genome sequence analysis identified the strain to be B. amyloliquefaciens subspecies plantarum F11, and showed that the strain carries the gene clusters for the production of a number of bioactive and surface-active compounds. These include the lipopeptides surfactin and fengycin, antibacterial polyketides macrolactin and bacillaene, and a putative novel lanthipeptide, among others. Through an activity-guided purification method using hydrophobic interaction chromatographic techniques, we confirmed the ability of the strain to produce fengycin lipopeptides. The identities of the isolated fengycin homologs were ascertained through tandem mass spectrometry.
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Affiliation(s)
- Mohamed Seghir Daas
- Valcore Laboratory, Department of Biology, University M'Hamed Bougara of Boumerdès, 35000, Boumerdès, Algeria.,Food Technology Research Division, Institut National de la Recherche Agronomiqued' Algérie, 16200, El Harrach, Algiers, Algeria
| | - Jeella Z Acedo
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Alberta, Canada
| | - Albert Remus R Rosana
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Alberta, Canada.,Department of Biological Sciences, University of Alberta, Edmonton, T6G 2E9, Alberta, Canada
| | - Fabini D Orata
- Department of Biological Sciences, University of Alberta, Edmonton, T6G 2E9, Alberta, Canada
| | - Béla Reiz
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Alberta, Canada
| | - Jing Zheng
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Alberta, Canada
| | - Farida Nateche
- Microbiology Group, Laboratory of Cellular and Molecular Biology, Faculty of Biological Sciences, University of Science and Technology-Houari Boumediene, 16111, Bab Ezzouar, Algiers, Algeria
| | - Rebecca J Case
- Department of Biological Sciences, University of Alberta, Edmonton, T6G 2E9, Alberta, Canada
| | - Salima Kebbouche-Gana
- Valcore Laboratory, Department of Biology, University M'Hamed Bougara of Boumerdès, 35000, Boumerdès, Algeria
| | - John C Vederas
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Alberta, Canada
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22
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Habe H, Taira T, Imura T. Surface Activity and Ca 2+-Dependent Aggregation Property of Lichenysin Produced by Bacillus licheniformis NBRC 104464. J Oleo Sci 2018; 67:1307-1313. [PMID: 30305561 DOI: 10.5650/jos.ess18107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Bacillus licheniformis NBRC 104464 produces a cyclic lipopeptide different from surfactin. After we performed liquid chromatography fractionation and purification, we used structural analyses to identify the cyclic lipopeptide as lichenysin. Surface tension measurements of lichenysin sodium salt in water yielded a critical micelle concentration (CMC) of 1.0×10-5 M. The surface tension at the CMC was 28.9 mN/m. Comparative analysis of Ca2+-influenced micellar aggregation of lichenysin and surfactin revealed that the formation rate of the lichenysin-Ca2+ complex aggregate remained low up to a [Ca2+]/[lichenysin] molar ratio of 80, whereas the surfactin-Ca2+ complex formed micellar aggregates at the same molar ratio. Further excessive addition of Ca2+ to the micellar solution of lichenysin induced higher turbidity than surfactin.
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Affiliation(s)
- Hiroshi Habe
- Environmental Management Research Institute, AIST
| | - Toshiaki Taira
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Tomohiro Imura
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
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23
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Sarwar A, Brader G, Corretto E, Aleti G, Abaidullah M, Sessitsch A, Hafeez FY. Qualitative analysis of biosurfactants from Bacillus species exhibiting antifungal activity. PLoS One 2018; 13:e0198107. [PMID: 29864153 PMCID: PMC5986119 DOI: 10.1371/journal.pone.0198107] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 05/14/2018] [Indexed: 11/28/2022] Open
Abstract
Bacillus spp. produce a broad spectrum of lipopeptide biosurfactants, among which surfactin, iturin and fengycin are widely studied families. The goals of this study were to characterize the biosurfactant activity of Bacillus spp. and to investigate their motility and biofilm formation capabilities. In addition, we extracted lipopeptides from these bacteria to assess their antifungal activities and analyzed these products by mass spectrometry (MS). B. amyloliquefaciens FZB42, Bacillus sp. NH 217 and B. subtilis NH-100 exhibited excellent biosurfactant and surface spreading activities, whereas B. atrophaeus 176s and Paenibacillus polymyxa C1225 showed moderate activity, and B. subtilis 168 showed no activity. Strains FZB42, NH-100, NH-217, 176s and CC125 exhibited excellent biofilm formation capabilities. Lipopeptide extracts displayed good antifungal activity against various phytopathogens and their associated diseases, such as Fusarium moniliforme (rice bakanae disease), Fusarium oxysporum (root rot), Fusarium solani (root rot) and Trichoderma atroviride (ear rot and root rot). Lipopeptide extracts of these strains also showed hemolytic activity, demonstrating their strong potential to produce surfactants. LCMS-ESI analyses identified the presence of surfactin, iturin and fengycin in the extracts of Bacillus strains. Thus, the strains assayed in this study show potential as biocontrol agents against various Fusarium and Trichoderma species.
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Affiliation(s)
- Ambrin Sarwar
- Department of Biosciences, Faculty of Sciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Günter Brader
- Health & Environment Department, Bioresources Unit, AIT Austrian Institute of Technology GmbH, AIT, Konrad Lorenz Strasse, Tulln, Austria
| | - Erika Corretto
- Health & Environment Department, Bioresources Unit, AIT Austrian Institute of Technology GmbH, AIT, Konrad Lorenz Strasse, Tulln, Austria
| | - Gajendar Aleti
- Health & Environment Department, Bioresources Unit, AIT Austrian Institute of Technology GmbH, AIT, Konrad Lorenz Strasse, Tulln, Austria
| | - Muhammad Abaidullah
- Department of Biosciences, Faculty of Sciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Angela Sessitsch
- Health & Environment Department, Bioresources Unit, AIT Austrian Institute of Technology GmbH, AIT, Konrad Lorenz Strasse, Tulln, Austria
| | - Fauzia Yusuf Hafeez
- Department of Biosciences, Faculty of Sciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
- * E-mail:
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24
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Tanaka K, Fukuda M, Amaki Y, Sakaguchi T, Inai K, Ishihara A, Nakajima H. Importance of prumycin produced by Bacillus amyloliquefaciens SD-32 in biocontrol against cucumber powdery mildew disease. PEST MANAGEMENT SCIENCE 2017; 73:2419-2428. [PMID: 28560847 DOI: 10.1002/ps.4630] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 04/29/2017] [Accepted: 05/25/2017] [Indexed: 05/14/2023]
Abstract
BACKGROUND Powdery mildew disease of cucurbits is caused mainly by Podosphaera fusca, which is one of the most important limiting factors in cucurbit production worldwide. Previously we reported that Bacillus amyloliquefaciens biocontrol strain SD-32 produces C17 bacillomycin D and [Ile 2002]surfactin, and that these metabolites play important roles in SD-32's biocontrol over cucumber gray mold disease. Our further investigation demonstrated that the culture broth and its supernatant suppressed cucumber powdery mildew disease in greenhouse experiments. However, the active principle(s) remained unknown. RESULTS The active compound was isolated from the culture supernatant after anti-powdery mildew disease activity-guided purification and identified as prumycin. Prumycin significantly suppressed the disease, whereas bacillomycin D and [Ile 2002]surfactin did not. Prumycin did not induce the expression of plant defense genes (PR1a and VSP1), suggesting that it does not act via plant defense response. Light microscopic observations of prumycin-treated cucumber cotyledon suggested that prumycin inhibits the conidial germination of P. fusca. CONCLUSION This study demonstrates that prumycin is a major factor in SD-32's suppression of cucumber powdery mildew disease. Our findings shed light for the first time on prumycin's role in biocontrol by Bacillus against this disease. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Keijitsu Tanaka
- Tsukuba Research & Technology Center, SDS Biotech KK, Ibaraki, Japan
| | - Mutsumi Fukuda
- Tsukuba Research & Technology Center, SDS Biotech KK, Ibaraki, Japan
| | - Yusuke Amaki
- Tsukuba Research & Technology Center, SDS Biotech KK, Ibaraki, Japan
| | | | - Koji Inai
- Tsukuba Research & Technology Center, SDS Biotech KK, Ibaraki, Japan
| | - Atsushi Ishihara
- Department of Agricultural Chemistry, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Hiromitsu Nakajima
- Department of Agricultural Chemistry, Faculty of Agriculture, Tottori University, Tottori, Japan
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25
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Coronel JR, Marqués A, Manresa Á, Aranda FJ, Teruel JA, Ortiz A. Interaction of the Lipopeptide Biosurfactant Lichenysin with Phosphatidylcholine Model Membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9997-10005. [PMID: 28885026 DOI: 10.1021/acs.langmuir.7b01827] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Lichenysins produced by Bacillus licheniformis are anionic lipopeptide biosurfactants with cytotoxic, antimicrobial, and hemolytic activities that possess enormous potential for chemical and biological applications. Through the use of physical techniques such as differential scanning calorimetry, small- and wide-angle X-ray diffraction, and Fourier-transform infrared spectroscopy as well as molecular dynamics simulations, we report on the interaction of Lichenysin with synthetic phosphatidylcholines differing in hydrocarbon chain length. Lichenysin alters the thermotropic phase behavior of phosphatidylcholines, displaying fluid-phase immiscibility and showing a preferential partitioning into fluid domains. The interlamellar repeat distance of dipalmitoylphosphatidylcholine (DPPC) is modified, affecting both the phospholipid palisade and the lipid/water interface, which also experiences a strong dehydration. Molecular dynamics confirms that Lichenysin is capable of interacting both with the hydrophobic portion of DPPC and with the polar headgroup region, which is of particular relevance to explain much of its properties. The results presented here help to establish a molecular basis for the Lichenysin-induced perturbation of model and biological membranes previously described in the literature.
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Affiliation(s)
- Jonathan R Coronel
- Escuela Superior Politécnica del Litoral, ESPOL , Facultad de Ingeniería Mecánica y Ciencias de la Producción, Campus Gustavo Galindo, P.O. Box 09-01-5863, Guayaquil, Ecuador
| | - Ana Marqués
- Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Barcelona , Joan XXIII s/n, E-08028 Barcelona, Spain
| | - Ángeles Manresa
- Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Barcelona , Joan XXIII s/n, E-08028 Barcelona, Spain
| | - Francisco J Aranda
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , Campus de Espinardo, E-30100 Murcia, Spain
| | - José A Teruel
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , Campus de Espinardo, E-30100 Murcia, Spain
| | - Antonio Ortiz
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , Campus de Espinardo, E-30100 Murcia, Spain
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Habe H, Taira T, Imura T. Screening of a Bacillus subtilis Strain Producing Multiple Types of Cyclic Lipopeptides and Evaluation of Their Surface-tension-lowering Activities. J Oleo Sci 2017; 66:785-790. [PMID: 28674328 DOI: 10.5650/jos.ess17039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Sixty Bacillus subtilis strains were investigated for their ability to produce cyclic lipopeptides (CLPs). Among them, B. subtilis NBRC 109107 produced at least three types of CLPs by high-performance liquid chromatography (HPLC) analysis, and these CLPs were thought to be surfactin, iturin A, and fengycin by polymerase chain reaction amplification of respective CLP synthetase-encoding genes. However, after HPLC fractionation and purification, structural analysis of the CLPs revealed that these were surfactin homologues, iturin A, and unknown CLPs, whose surface-tension-lowering activities were 29.4, 56.7, and 48.6 mN/m, respectively. By contrast, fengycin was not detected.
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Affiliation(s)
- Hiroshi Habe
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Toshiaki Taira
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Tomohiro Imura
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST)
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Perez KJ, Viana JDS, Lopes FC, Pereira JQ, Dos Santos DM, Oliveira JS, Velho RV, Crispim SM, Nicoli JR, Brandelli A, Nardi RMD. Bacillus spp. Isolated from Puba as a Source of Biosurfactants and Antimicrobial Lipopeptides. Front Microbiol 2017; 8:61. [PMID: 28197131 PMCID: PMC5281586 DOI: 10.3389/fmicb.2017.00061] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 01/10/2017] [Indexed: 11/13/2022] Open
Abstract
Several products of industrial interest are produced by Bacillus, including enzymes, antibiotics, amino acids, insecticides, biosurfactants and bacteriocins. This study aimed to investigate the potential of two bacterial isolates (P5 and C3) from puba, a regional fermentation product from cassava, to produce multiple substances with antimicrobial and surface active properties. Phylogenetic analyses showed close relation of isolates P5 and C3 with Bacillus amyloliquefaciens and Bacillus thuringiensis, respectively. Notably, Bacillus sp. P5 showed antimicrobial activity against pathogens such as Listeria monocytogenes and Bacillus cereus, in addition to antifungal activity. The presence of genes encoding pre-subtilosin (sboA), malonyl CoA transacylase (ituD), and the putative transcriptional terminator of surfactin (sfp) were detected in Bacillus sp. P5, suggesting the production of the bacteriocin subtilosin A and the lipopeptides iturin A and surfactin by this strain. For Bacillus sp. C3 the presence of sboA and spas (subtilin) genes was observed by the first time in members of B. cereus cluster. Bacillus sp. P5 showed emulsifying capability on mineral oil, soybean biodiesel and toluene, while Bacillus sp. C3 showed emulsifying capability only on mineral oil. The reduction of the surface tension in culture medium was also observed for strain P5, confirming the production of surface-active compounds by this bacterium. Monoprotonated molecular species and adducts of sodium and potassium ions of surfactin, iturin, and fengycin were detected in the P5 culture medium. Comparative MS/MS spectra of the peak m/z 1030 (C14 surfactin A or C15 surfactin B [M+Na]+) and peak m/z 1079 (C15 iturin [M+Na]+) showed the same fragmentation profile of standards, confirming the molecular identification. In conclusion, Bacillus sp. P5 showed the best potential for the production of antifungal, antibacterial, and biosurfactant substances.
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Affiliation(s)
- Karla J Perez
- Laboratório de Microbiologia Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas GeraisBelo Horizonte, Brazil; Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do SulPorto Alegre, Brazil
| | - Jaime Dos Santos Viana
- Laboratório de Microbiologia Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Fernanda C Lopes
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Jamile Q Pereira
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Daniel M Dos Santos
- Núcleo de Biomoléculas, Departamento de Bioquímica-Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Jamil S Oliveira
- Núcleo de Biomoléculas, Departamento de Bioquímica-Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Renata V Velho
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Silvia M Crispim
- Laboratório de Microbiologia Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Jacques R Nicoli
- Laboratório de Microbiologia Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
| | - Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Regina M D Nardi
- Laboratório de Microbiologia Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais Belo Horizonte, Brazil
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Kim IS, Yang SY, Park SK, Kim YC. Quorum sensing is a key regulator for the antifungal and biocontrol activity of chitinase-producing Chromobacterium sp. C61. MOLECULAR PLANT PATHOLOGY 2017; 18:134-140. [PMID: 26833901 PMCID: PMC6638307 DOI: 10.1111/mpp.12379] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 01/14/2016] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
Chromobacterium sp. strain C61 has strong biocontrol activity; however, the genetic and biochemical determinants of its plant disease suppression activity are not well understood. Here, we report the identification and characterization of two new determinants of its biocontrol activity. Transposon mutagenesis was used to identify mutants that were deficient in fungal suppression. One of these mutants had an insertion in a homologue of depD, a structural gene in the dep operon, that encodes a protein involved in non-ribosomal peptide synthesis. In the second mutant, the insertion was in a homologue of the luxI gene, which encodes a homoserine lactone synthase. The luxI- and depD- mutants had no antifungal activity in vitro and a dramatically reduced capacity to suppress various plant diseases in planta. Antifungal production and biocontrol were restored by complementation of the luxI- mutant. Other phenotypes associated with effective biological control, including motility and lytic enzyme secretion, were also affected by the luxI mutation. Biochemical analysis of ethyl acetate extracts of culture filtrates of the mutant and wild-type strains showed that a key antifungal compound, chromobactomycin, was produced by wild-type C61 and the complemented luxI- mutant, but not by the luxI- or depD- mutant. These data suggest that multiple biocontrol-related phenotypes are regulated by homoserine lactones in C61. Thus, quorum sensing plays an essential role in the biological control potential of diverse bacterial lineages.
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Affiliation(s)
- In Seon Kim
- Institute of Environmentally‐Friendly AgricultureCollege of Agriculture and Life Sciences, Chonnam National UniversityGwangju61186South Korea
| | - Si Young Yang
- Institute of Environmentally‐Friendly AgricultureCollege of Agriculture and Life Sciences, Chonnam National UniversityGwangju61186South Korea
| | - Seur Kee Park
- Department of Agricultural BiologySunchon National UniversitySuncheon 57922South Korea
| | - Young Cheol Kim
- Institute of Environmentally‐Friendly AgricultureCollege of Agriculture and Life Sciences, Chonnam National UniversityGwangju61186South Korea
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Cai XC, Liu CH, Wang BT, Xue YR. Genomic and metabolic traits endow Bacillus velezensis CC09 with a potential biocontrol agent in control of wheat powdery mildew disease. Microbiol Res 2016; 196:89-94. [PMID: 28164794 DOI: 10.1016/j.micres.2016.12.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/06/2016] [Accepted: 12/22/2016] [Indexed: 10/20/2022]
Abstract
Bacillus velezensis CC09, which was isolated from healthy leaves of Cinnamomum camphora and previously identified as Bacillus amyloliquefaciens CC09, shows great potential as a new biocontrol agent, in control of many phytopathogenic diseases. To extend our understanding of the potential antifungal capacities, we did a whole genome analysis of strain CC09. Result shows that strain CC09 has a relatively large genome size (4.17Mb) with an average GC content of 46.1%, and 4021 predicted genes. Thirteen secondary metabolites encoding clusters have been identified within the genome of B. velezensis CC09 using genome mining technique. Data of comparative genomic analysis indicated that 3 of the clusters are conserved by all strains of B. velezensis, B. amyloliquefaciens and B. subtilis 168, 9 by B. velezensis and B. amyloliquefaciens, and 2 by all strains of B. velezensis. Another 2 clusters encoding NRPS (Non-Ribosomal Peptide Synthetases) and NRPS-TransATPKS (NRPS and trans-Acyl Transferase Polyketide Synthetases) respectively are observed only in 15 B. velezensis strains, which might lead to the synthesis of novel bioactive compounds and could be explored as antimicrobial agents in the future. These clusters endow B. velezensis CC09 with strong and broad antimicrobial activities, for example, in control of wheat powdery mildew disease. Moreover, our data further confirmed the taxonomy of strain CC09 is a member of B. velezensis rather than a strain of B. amyloliquefaciens based on core genome sequence analysis using phylogenomic approach.
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Affiliation(s)
- Xun-Chao Cai
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Chang-Hong Liu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
| | - Bao-Tong Wang
- College of Plant Protection, Northwest A & F University, Xi'an 712100, China
| | - Ya-Rong Xue
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
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Kaur P, Joshi N, Singh I, Saini H. Identification of cyclic lipopeptides produced byBacillus vallismortisR2 and their antifungal activity againstAlternaria alternata. J Appl Microbiol 2016; 122:139-152. [DOI: 10.1111/jam.13303] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 08/21/2016] [Accepted: 09/17/2016] [Indexed: 11/28/2022]
Affiliation(s)
- P.K. Kaur
- Department of Microbiology; Guru Nanak Dev University; Amritsar India
| | - N. Joshi
- Department of Natural Products; National Institute of Pharmaceutical Education and Research; Mohali India
| | - I.P. Singh
- Department of Natural Products; National Institute of Pharmaceutical Education and Research; Mohali India
| | - H.S. Saini
- Department of Microbiology; Guru Nanak Dev University; Amritsar India
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Liu H, Gao L, Han J, Ma Z, Lu Z, Dai C, Zhang C, Bie X. Biocombinatorial Synthesis of Novel Lipopeptides by COM Domain-Mediated Reprogramming of the Plipastatin NRPS Complex. Front Microbiol 2016; 7:1801. [PMID: 27909427 PMCID: PMC5112269 DOI: 10.3389/fmicb.2016.01801] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 10/26/2016] [Indexed: 11/25/2022] Open
Abstract
Both donors and acceptors of communication-mediating (COM) domains are essential for coordinating intermolecular communication within nonribosomal peptides synthetases (NRPSs) complexes. Different sets of COM domains provide selectivity, allowing NRPSs to utilize different natural biosynthetic templates. In this study, novel lipopeptides were synthesized by reprogramming the plipastatin biosynthetic machinery. A Thr-to-Asp point mutation was sufficient to shift the selectivity of the donor COM domain of ppsB toward that of ppsD. Deletion and/or interchangeability established donor and acceptor function. Variations in acceptor COM domain did not result in novel product formation in the presence of its partner donor, whereas plipastatin formation was completely abrogated by altering donor modules. Five novel lipopeptides (cyclic pentapeptide, linear hexapeptide, nonapeptide, heptapeptide, and cyclic octapeptide) were identified and verified by high-resolution LC-ESI-MS/MS. In addition, we demonstrated the potential to generate novel strains with the antimicrobial activity by selecting compatible COM domains, and the novel lipopeptides exhibited antimicrobial activity against five of the fungal species at a contention of 31.25–125 μg/ml.
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Affiliation(s)
- Hongxia Liu
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Ling Gao
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Jinzhi Han
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Zhi Ma
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Chen Dai
- College of Life Sciences, Nanjing Agricultural University Nanjing, China
| | - Chong Zhang
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
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New Cyclic Lipopeptides of the Iturin Class Produced by Saltern-Derived Bacillus sp. KCB14S006. Mar Drugs 2016; 14:md14040072. [PMID: 27049393 PMCID: PMC4849076 DOI: 10.3390/md14040072] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/24/2016] [Accepted: 03/28/2016] [Indexed: 12/30/2022] Open
Abstract
Salterns, one of the most extreme natural hypersaline environments, are a rich source of halophilic and halotolerant microorganisms, but they remain largely underexplored ecological niches in the discovery of bioactive secondary metabolites. In continued efforts to investigate the metabolic potential of microbial populations from chemically underexplored sites, three new lipopeptides named iturin F1, iturin F2 and iturin A9 (1–3), along with iturin A8 (4), were isolated from Bacillus sp. KCB14S006 derived from a saltern. The structures of the isolated compounds were established by 1D-, 2D-NMR and HR-ESIMS, and their absolute configurations were determined by applying advanced Marfey’s method and CD spectroscopy. All isolates exhibited significant antifungal activities against various pathogenic fungi and moderate cytotoxic activities toward HeLa and srcts-NRK cell lines. Moreover, in an in vitro enzymatic assay, compound 4 showed a significant inhibitory activity against indoleamine 2,3-dioxygenase.
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Gao C, Yi X, Yu L, Pan L, Yang X, Qin M, Huang R. A New Alkaloid from the Deep-Sea Bacterium Bacillus amyloliquefaciens Gas 00152. Chem Nat Compd 2016. [DOI: 10.1007/s10600-016-1648-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Coronel JR, Aranda FJ, Teruel JA, Marqués A, Manresa Á, Ortiz A. Kinetic and Structural Aspects of the Permeabilization of Biological and Model Membranes by Lichenysin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:78-87. [PMID: 26652062 DOI: 10.1021/acs.langmuir.5b04294] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The various lichenysins produced by Bacillus licheniformis are anionic surfactants with interesting properties. Here it is shown that lichenysin caused hemolysis of human erythrocytes, which varied with lichenysin concentration in a sigmoidal manner. The release of K(+) from red blood cells induced by lichenysin preceded the leakage of hemoglobin, and in addition, hemolysis could be impeded by the presence of compounds in the external medium having a size larger than that of PEG 3350, indicating a colloid-osmotic mechanism for hemolysis. Lichenysin also caused permeabilization of model phospholipid membranes, which was a slow process with an initial lag period of 10-20 s observed for all lichenysin concentrations. A high cholesterol ratio in the membrane decreased the extent of leakage as compared to that of pure POPC, whereas at lower ratios the effect of cholesterol was the opposite, enhancing the extent of leakage. POPE was found to decrease the extent of leakage at all the concentrations assayed, and inclusion of DPPC resulted in a considerable increase in CF leakage extent. From this scenario it was concluded that lipid membrane composition plays a role in the target membrane selectivity of lichenysin. Molecular dynamics simulations indicated that lichenysin is well distributed along the bilayer, and Na(+) ions can penetrate inside the bilayer through the lichenysin molecules. The presence of lichenysin in the membrane increases the permeability of the membrane to hydrophilic molecules facilitating its flux across the lipid palisade. The results presented in this work contribute to understanding the molecular mechanisms that explain the biological actions of lichenysin related to biomembranes.
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Affiliation(s)
- Jonathan R Coronel
- Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Barcelona , Joan XXIII s/n, E-08028 Barcelona, Spain
| | - Francisco J Aranda
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , E-30100 Murcia, Spain
| | - José A Teruel
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , E-30100 Murcia, Spain
| | - Ana Marqués
- Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Barcelona , Joan XXIII s/n, E-08028 Barcelona, Spain
| | - Ángeles Manresa
- Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Barcelona , Joan XXIII s/n, E-08028 Barcelona, Spain
| | - Antonio Ortiz
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia , E-30100 Murcia, Spain
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Yokota K, Hayakawa H. Impact of Antimicrobial Lipopeptides from Bacillus sp. on Suppression of Fusarium Yellows of Tatsoi. Microbes Environ 2015; 30:281-3. [PMID: 26118972 PMCID: PMC4567569 DOI: 10.1264/jsme2.me15062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Iturin A and surfactin are antimicrobial lipopeptides produced by antagonistic Bacillus spp. We herein demonstrated that both lipopeptides amended the soil-mediated suppression of the soil-borne disease, Fusarium yellows of tatsoi (Brassica rapa var. rosularis). Significant disease suppression was conferred by the amendments of purified iturin A or surfactin to soil. However, an excess amount of iturin A or surfactin to soil resulted in the loss of disease suppression activity.
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Affiliation(s)
- Kenji Yokota
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture
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Torres MJ, Petroselli G, Daz M, Erra-Balsells R, Audisio MC. Bacillus subtilis subsp. subtilis CBMDC3f with antimicrobial activity against Gram-positive foodborne pathogenic bacteria: UV-MALDI-TOF MS analysis of its bioactive compounds. World J Microbiol Biotechnol 2015; 31:929-40. [PMID: 25820813 DOI: 10.1007/s11274-015-1847-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 03/21/2015] [Indexed: 02/07/2023]
Abstract
In this work a new Bacillus sp. strain, isolated from honey, was characterized phylogenetically. Its antibacterial activity against three relevant foodborne pathogenic bacteria was studied; the main bioactive metabolites were analyzed using ultraviolet matrix assisted laser desorption-ionization mass spectrometry (UV-MALDI MS). Bacillus CBMDC3f was phylogenetically characterized as Bacillus subtilis subsp. subtilis after rRNA analysis of the 16S subunit and the gyrA gene (access codes Genbank JX120508 and JX120516, respectively). Its antibacterial potential was evaluated against Listeria monocytogenes (9 strains), B. cereus (3 strains) and Staphylococcus aureus ATCC29213. Its cell suspension and cell-free supernatant (CFS) exerted significant anti-Listeria and anti-S. aureus activities, while the lipopeptides fraction (LF) also showed anti-B. cereus effect. The UV-MALDI-MS analysis revealed surfactin, iturin and fengycin in the CFS, whereas surfactin predominated in the LF. The CFS from CBMDC3f contained surfactin, iturin and fengycin with four, two and four homologues per family, respectively, whereas four surfactin, one iturin and one fengycin homologues were identified in the LF. For some surfactin homologues, their UV-MALDI-TOF/TOF (MS/MS; Laser Induced Decomposition method, LID) spectra were also obtained. Mass spectrometry analysis contributed with relevant information about the type of lipopeptides that Bacillus strains can synthesize. From our results, surfactin would be the main metabolite responsible for the antibacterial effect.
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Affiliation(s)
- M J Torres
- Instituto de Investigaciones para la Industria Química (INIQUI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Salta, Av.Bolivia 5150, 4400, Salta, Argentina
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Yang H, Li X, Li X, Yu H, Shen Z. Identification of lipopeptide isoforms by MALDI-TOF-MS/MS based on the simultaneous purification of iturin, fengycin, and surfactin by RP-HPLC. Anal Bioanal Chem 2015; 407:2529-42. [PMID: 25662934 DOI: 10.1007/s00216-015-8486-8] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/12/2014] [Accepted: 01/13/2015] [Indexed: 11/24/2022]
Abstract
A three-stage linear gradient strategy using reverse-phase high-performance liquid chromatography (HPLC) was optimized for rapid, high-quality, and simultaneous purification of the lipopeptide isoforms of iturin, fengycin, and surfactin, which may differ in composition by only a single amino acid and/or the fatty acid residue. Matrix-assisted laser desorption ionization time-of-flight tandem mass spectrometry (MALDI-TOF-MS/MS) was applied to detect the lipopeptides harvested from each reversed-phase HPLC peak. Amino acid analysis based on phenyl isothiocyanate derivatization was further used for confirmation of the amino acid species and molar ratio in a certain HPLC fraction. By this MALDI-TOF-MS/MS coupled with amino acid analysis, it was revealed that iturin at m/z 1,043 consists of a circular Asn-Tyr-Asn-Gln-Pro-Asn-Ser peptide and C14 β-OH fatty acid. Surfactin homologs from Bacillus subtilis THY-7 at m/z 1,030, 1,044, 1,058, and 1,072 possess a circular Glu-Leu-Leu-Val-Asp-Leu-Leu peptide and the β-OH fatty acid with a different length (C13-C16). Fengycin species at m/z 1,463 and 1,477 are homologs possessing the circular peptide Glu-Orn-Tyr-Thr-Glu-Ala-Pro-Gln-Tyr-Ile linked to a C16 or C17 γ-OH fatty acid, whereas fengycin at m/z 1,505 contains a Glu-Orn-Tyr-Thr-Glu-Val-Pro-Gln-Tyr-Ile sequence with a Val instead of Ala at position 6. The method developed in this work provided an efficient approach for characterization of diverse lipopeptide isoforms from the iturin, fengycin, and surfactin families.
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Affiliation(s)
- Huan Yang
- Key Laboratory for Industrial Biocatalysis of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
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Two new cyclic tetrapeptides from deep-sea bacterium Bacillus amyloliquefaciens GAS 00152. J Antibiot (Tokyo) 2014; 67:541-3. [DOI: 10.1038/ja.2014.27] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/18/2014] [Accepted: 02/27/2014] [Indexed: 01/11/2023]
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40
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Tanaka K, Ishihara A, Nakajima H. Isolation of anteiso-C17, iso-C17, iso-C16, and iso-C15 bacillomycin D from Bacillus amyloliquefaciens SD-32 and their antifungal activities against plant pathogens. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:1469-76. [PMID: 24548079 DOI: 10.1021/jf404531t] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Two new cyclic lipopeptides (3 and 4) were isolated from the culture filtrate of Bacillus amyloliquefaciens strain SD-32, together with two known metabolites, iso-C15 and iso-C16 bacillomycin D (1 and 2). Spectroscopic and chemical analyses identified the structures of the new compounds 3 and 4 as anteiso-C17 bacillomycin D, cyclic (l-Asn-d-Tyr-d-Asn-l-Pro-l-Glu-d-Ser-l-Thr-3-amino-14-methylhexadecanoic acid) and iso-C17 bacillomycin D, cyclic (l-Asn-d-Tyr-d-Asn-l-Pro-l-Glu-d-Ser-l-Thr-3-amino-15-methylhexadecanoic acid), respectively. The absolute configuration of C-3 in the β-amino fatty acid was determined to be R on the basis of the CD spectrum of its dinitrophenyl-p-methoxyaniline derivative. The activities of compounds 1-4 were evaluated against 13 plant pathogens: the activities of anteiso- and iso-C17 bacillomycin D (3 and 4) were almost the same and stronger than those of iso-C15 and iso-C16 bacillomycin D (1 and 2); iso-C15 bacillomycin D (1) was weakest. Compounds 2-4 inhibited the growth of all fungi tested; however, Pythium aphanidermatum was not inhibited at all by any of the compounds. Furthermore, compounds 1-4 at concentrations of 80, 40, 30, and 30 μM, respectively, inhibited completely the Botrytis cinerea infection in cucumber leaf.
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Affiliation(s)
- Keijitsu Tanaka
- Tsukuba Research and Technology Center, SDS Biotech K.K., Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
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Kim HJ, Choi HS, Yang SY, Kim IS, Yamaguchi T, Sohng JK, Park SK, Kim JC, Lee CH, Gardener BM, Kim YC. Both extracellular chitinase and a new cyclic lipopeptide, chromobactomycin, contribute to the biocontrol activity of Chromobacterium sp. C61. MOLECULAR PLANT PATHOLOGY 2014; 15:122-132. [PMID: 24033929 PMCID: PMC6638690 DOI: 10.1111/mpp.12070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Chromobacterium sp. strain C61 displays antifungal activities in vitro and has been used successfully for the biocontrol of plant diseases under field conditions. In this study, the roles of extracellular chitinase and an antifungal compound produced by strain C61 were investigated to elucidate their contributions to biological control activity. The bacterium possessed a locus chi54 encoding an extracellular chitinase, and mutation of chi54 eliminated chitinase production. Production of the extracellular enzyme and expression of the chi54 transcript were increased in the wild-type strain when chitin was added to the culture medium. In vitro assays showed that purified chitinase inhibited spore germination of multiple pathogens. However, the in planta biocontrol activity of filtrates of cultures grown in the presence of chitin was lower than that of filtrates grown without chitin, indicating that correlation between chitinase and biocontrol activity was lacking. The analysis of C61 culture filtrates revealed an antifungal cyclic lipopeptide, chromobactomycin, whose structure contained a unique nonameric peptide ring. The purified chromobactomycin inhibited the growth of several phytopathogenic fungi in vitro, and plant application significantly reduced disease severity for several pathogens. Furthermore, the production of chromobactomycin was reduced in cultures amended with chitin. These data suggest that the production of both the extracellular chitinase Chi54 and the newly identified antibiotic chromobactomycin can contribute, in an interconnected way, to the suppression of plant disease by Chromobacterium sp. strain C61.
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Affiliation(s)
- Hyun Jung Kim
- Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 500-757, South Korea
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Purification and Partial Characterization of Bacillomycin L Produced by Bacillus amyloliquefaciens K103 from Lemon. Appl Biochem Biotechnol 2013; 171:2262-72. [DOI: 10.1007/s12010-013-0424-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 08/05/2013] [Indexed: 12/29/2022]
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Leães FL, Velho RV, Caldas DGG, Pinto JV, Tsai SM, Brandelli A. Influence of pH and temperature on the expression of sboA and ituD genes in Bacillus sp. P11. Antonie van Leeuwenhoek 2013; 104:149-54. [PMID: 23677688 DOI: 10.1007/s10482-013-9935-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 05/06/2013] [Indexed: 10/26/2022]
Abstract
Temperature and pH are key factors influencing the production of antimicrobial peptides. In this work, qRT-PCR methodology was used to demonstrate the effect of these two variables on sboA (subtilosin A) and ituD (iturin A) expression in Bacillus sp. P11, an isolate from aquatic environment of the Amazon. Bacillus sp. P11 was incubated in BHI broth for 36 h at 30, 37 and 42 °C, and the pH values were 6.0, 7.4 and 8.0. The production of subtilosin A and iturin A was confirmed by mass spectrometry. The sboA expression increased 200-fold when the initial pH was 8.0. In contrast, ituD expression was maximum at pH 6.0. Increased temperature (42 °C) was adverse for both genes, but ituD expression increased at 37 °C. Expression of sboA and ituD was strongly affected by pH and temperature and qRT-PCR proved to be a powerful tool to investigate the potential of Bacillus strains to produce subtilosin A and iturin A.
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Affiliation(s)
- Fernanda Leal Leães
- Laboratório de Bioquímica e Microbiologia Aplicada, Universidade Federal do Rio Grande do Sul UFRGS, ICTA-UFRGS, Av. Bento Gonçalves 9500, Porto Alegre 91501-970, Brazil
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44
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Zhao X, Zhou ZJ, Han Y, Wang ZZ, Fan J, Xiao HZ. Isolation and identification of antifungal peptides from Bacillus BH072, a novel bacterium isolated from honey. Microbiol Res 2013; 168:598-606. [PMID: 23545354 DOI: 10.1016/j.micres.2013.03.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Revised: 02/27/2013] [Accepted: 03/02/2013] [Indexed: 10/27/2022]
Abstract
A bacterial strain BH072 isolated from a honey sample showed antifungal activity against mold. Based on morphological, biochemical, physiological tests, and analysis of 16S rDNA sequence, the strain was identified to be a new subspecies of Bacillus sp. It had a broad spectrum of antifungal activity against various mold, such as Aspergillus niger, Pythium, and Botrytis cinerea. Six pairs of antifungal genes primers were designed and synthesized, and ituA, hag, tasA genes were detected by PCR analysis. The remarkable antifungal activity could be associated with the co-production of these three peptides. One of them was purified by 30-40% ammonium sulfate precipitation, Sephadex G-75 gel filtration and anion exchange chromatography on D201 resin. The purified peptide was estimated to be 35.615 kDa and identified to be flagellin by micrOTOF-Q II. By using methanol extraction, another substance was isolated from fermentation liquor, and determined to be iturin with liquid chromatography-mass spectrometry (LC-MS) method. The third possible peptide encoded by tasA was not isolated in this study. The culture liquor displayed antifungal activity in a wide pH range (5.0-9.0) and at 40-100°C. The result of the present work suggested that Bacillus BH072 might be a bio-control bacterium of research value.
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Affiliation(s)
- Xin Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
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45
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Abstract
Sufu is a traditional Chinese fermented food. The safety of spontaneous fermentation products has been concerned by more and more people. A total of four isolates with big clear halos on the casein medium plate were isolated from spontaneous fermented Sufu in southern Sichuan. A1 and A3 most likely belong to Bacillus cereus B according to their phenotype and Biolog Microbial Identification System. B2 was classified in group as Bacillus amyloliquefaciens B with the same methods. A2 was identified as Bacillus subtilis according to their phenotype and 16SrRNA. The safety of the strains are also discussed.
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46
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Antifungal peptides produced by Bacillus amyloliquefaciens AG1 active against grapevine fungal pathogens. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-011-0415-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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47
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Zhao J, Guo L, Zeng H, Yang X, Yuan J, Shi H, Xiong Y, Chen M, Han L, Qiu D. Purification and characterization of a novel antimicrobial peptide from Brevibacillus laterosporus strain A60. Peptides 2012; 33:206-11. [PMID: 22244810 DOI: 10.1016/j.peptides.2012.01.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 01/02/2012] [Accepted: 01/02/2012] [Indexed: 11/25/2022]
Abstract
A novel antimicrobial peptide, with molecular mass of 1602.0469Da, produced by Brevibacillus laterosporus strain A60 was isolated and purified from the soil of mango plants. The purification procedure consisted of ammonium sulfate precipitation, cation exchange chromatography on an HiTrap SP HP column, thin layer chromatography and High Performance Liquid Chromatography (HPLC) on C18 reversed-phase column. After the four isolation procedures, one peptide with antimicrobial activity was obtained and named BL-A60. The determination of the complete amino acid sequences of this peptide showed that it contains eleven amino acid residues, L-Y-K-L-V-K-V-V-L-N-M, and a choline connected to the N-terminal and a tenuazonic acid modified of the C-terminal. This peptide shows relatively low identification to other antimicrobial peptides from bacteria. Purified BL-A60 showed high pH and thermal stability and a strong inhibition of different stages of the life cycle of Phytophthora capsici, including mycelial growth, sporangia formation and cystospore germination, with EC(50) values of 7.89, 0.60 and 21.96 μg ml(-1), respectively.
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Affiliation(s)
- Jing Zhao
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No 12 Zhongguancun South Street, Beijing 100081, China
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48
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Pseudomonas and other Microbes in Disease-Suppressive Soils. SUSTAINABLE AGRICULTURE REVIEWS 2012. [DOI: 10.1007/978-94-007-4113-3_5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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49
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Dunlap CA, Schisler DA, Price NP, Vaughn SF. Cyclic lipopeptide profile of three Bacillus subtilis strains; antagonists of Fusarium head blight. J Microbiol 2011; 49:603-9. [PMID: 21887643 DOI: 10.1007/s12275-011-1044-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 04/13/2011] [Indexed: 10/17/2022]
Abstract
The objective of the study was to identify the lipopetides associated with three Bacillus subtilis strains. The strains are antagonists of Gibberella zeae, and have been shown to be effective in reducing Fusarium head blight in wheat. The lipopeptide profile of three B. subtilis strains (AS43.3, AS43.4, and OH131.1) was determined using mass spectroscopy. Strains AS43.3 and AS43.4 produced the anti-fungal lipopeptides from the iturin and fengycin family during the stationary growth phase. All three strains produced the lipopeptide surfactin at different growth times. Strain OH131.1 only produced surfactin under these conditions. The antifungal activity of the culture supernatant and individual lipopeptides was determined by the inhibition of G. zeae. Cell-free supernatant from strains AS43.3 and AS43.4 demonstrated strong antibiosis of G. zeae, while strain OH131.1 had no antibiosis activity. These results suggest a different mechanism of antagonism for strain OH131.1, relative to AS43.3 and AS43.4.
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Affiliation(s)
- Christopher A Dunlap
- Crop Bioprotection, Research Units, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, 1815 North University Street, Peoria, Illinois 61604, USA.
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Combined use of LC–ESI-MS and antifungal tests for rapid identification of bioactive lipopeptides produced by Bacillus amyloliquefaciens CCMI 1051. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.05.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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