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Shao X, Xie W, Liang Y, Luo G, Li L, Zheng W, Xu Q, Xu H. Algicidal characteristics of novel algicidal compounds, cyclic lipopeptide surfactins from Bacillus tequilensis strain D8, in eliminating Heterosigma akashiwo blooms. Front Microbiol 2022; 13:1066747. [PMID: 36532506 PMCID: PMC9748430 DOI: 10.3389/fmicb.2022.1066747] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/14/2022] [Indexed: 04/17/2024] Open
Abstract
Heterosigma akashiwo blooms have caused severe damage to marine ecosystems, the aquaculture industry and human health worldwide. In this study, Bacillus tequilensis D8 isolated from an H. akashiwo bloom area was found to exert high algicidal activity via extracellular metabolite production. This activity remained stable after exposure to different temperatures and light intensities. Scanning electron microscopy observation and fluorescein diacetate staining indicated that the algicidal substances rapidly destroyed algal plasma membranes and decreased esterase activity. Significant decreases in the maximum photochemical quantum yield and relative electron transfer rate were observed, which indicated photosynthetic membrane destruction. Subsequently, the algicidal compounds were separated and purified by high-performance liquid chromatography and identified as three surfactin homologues by interpreting high-resolution electrospray ionization mass spectrometry and nuclear magnetic resonance spectroscopy data. Among these, surfactin-C13 and surfactin-C14 exhibited strong algicidal activity against three HAB-causing species, namely, H. akashiwo, Skeletonema costatum, and Prorocentrum donghaiense, with 24 h-LC50 values of 1.2-5.31 μg/ml. Surfactin-C15 showed strong algicidal activity against S. costatum and weak algicidal activity against H. akashiwo but little activity against P. donghaiense. The present study illuminates the algicidal characteristics and mechanisms of action of surfactins on H. akashiwo and their potential applicability in controlling harmful algal blooms.
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Affiliation(s)
- Xueping Shao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Wanxin Xie
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Yiling Liang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Guiying Luo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Ling Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Wei Zheng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Qingyan Xu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
| | - Hong Xu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, China
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, Fujian, China
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Ma Z, Zhang S, Zhang S, Wu G, Shao Y, Mi Q, Liang J, Sun K, Hu J. Isolation and characterization of a new cyclic lipopeptide surfactin from a marine-derived Bacillus velezensis SH-B74. J Antibiot (Tokyo) 2020; 73:863-867. [PMID: 32655142 DOI: 10.1038/s41429-020-0347-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 11/10/2022]
Abstract
A marine-sediment-derived bacterium Bacillus velezensis SH-B74 can produce cyclic lipopeptides (CLPs). This study presented the isolation, characterization, and activity evaluation of a new CLP from the bacterial cultures of the strain SH-B74. Multiple chromatographic methods (solid-phase extraction and reversed-phase high-performance liquid chromatography) were applied to the purifying procedure of CLP, and the structural characterization of the new CLP was conducted by various spectroscopy (1D and 2D nuclear magnetic resonance together with Fourier transform infrared spectroscopy) and spectrometry (liquid chromatography-mass spectrometry, high-resolution mass spectrometry and tandem mass spectrometry) techniques as well as Marfey's method. The results displayed that the new CLP (anteiso-C15 Ile2,7 surfactin, 1) consists of a peptidic backbone of L-Glu1, L-Ile2, D-Leu3, L-Val4, L-Asp5, D-Leu6, L-Ile7, and an anteiso-C15 type saturated fatty acid chain. Further activity assay showed that the new CLP displays activity on the inhibition of the appressoria formation of rice blast causal pathogen Magnaporthe oryzae. To sum up, the results presented the perspective of potential application of the new CLP as a green agrichemical to control M. oryzae.
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Affiliation(s)
- Zongwang Ma
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China.
| | - Songya Zhang
- Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, 518055, Shenzhen, China
| | - Shihu Zhang
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Guoyang Wu
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Yue Shao
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Quanfeng Mi
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Junyu Liang
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Kun Sun
- College of Life Science, Northwest Normal University, 967 East Anning Road, 730070, Lanzhou, China
| | - Jiangchun Hu
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, 110016, Shenyang, China.
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Yan L, Liu G, Zhao B, Pang B, Wu W, Ai C, Zhao X, Wang X, Jiang C, Shao D, Liu Q, Li M, Wang L, Shi J. Novel Biomedical Functions of Surfactin A from Bacillus subtilis in Wound Healing Promotion and Scar Inhibition. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:6987-6997. [PMID: 32412748 DOI: 10.1021/acs.jafc.0c01658] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surfactin produced by Bacillus subtilis is a powerful biosurfactant in food, cosmetics, and pesticide industries. However, its suitability in wound healing applications is uncertain. In this article, we determined the effects of surfactin A from B. subtilis on wound healing, angiogenesis, cell migration, inflammatory response, and scar formation. The results indicated that 80.65 ± 2.03% of surfactin A-treated wounds were closed, whereas 44.30 ± 4.26% of the vehicle-treated wound areas remained open on day 7 (P < 0.05). In mechanisms, it upregulated the expression of hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF), accelerated keratinocyte migration through mitogen-activated protein kinase (MAPK) and nuclear factor-κB (NF-κB) signaling pathways, and regulated the secretion of proinflammatory cytokines and macrophage phenotypic switch. More attractive, surfactin A showed a seductive capability to inhibit scar tissue formation by affecting the expression of α-smooth muscle actin (α-SMA) and transforming growth factor (TGF-β). Overall, the study revealed a new function and potential of surfactin A as an affordable and efficient wound healing drug.
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Affiliation(s)
- Lu Yan
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Guanwen Liu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Bin Zhao
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Bing Pang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Wanqin Wu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Chongyang Ai
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Xixi Zhao
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Xinglong Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Xianyang, Shaanxi Province 712100, China
| | - Chunmei Jiang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Dongyan Shao
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Qianlong Liu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Meixuan Li
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Lei Wang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
| | - Junling Shi
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi Province 710072, China
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Ram H, Kumar Sahu A, Said MS, Banpurkar AG, Gajbhiye JM, Dastager SG. A novel fatty alkene from marine bacteria: A thermo stable biosurfactant and its applications. JOURNAL OF HAZARDOUS MATERIALS 2019; 380:120868. [PMID: 31319332 DOI: 10.1016/j.jhazmat.2019.120868] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 07/04/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
In this study, a novel thermo stable biosurfactants, 1-Pentanonacontene (C95H190) a fatty alkene and 3-Hydroxy-16-methylheptadecanoic acid (C18H36O3) were isolated from a marine isolate SGD-AC-13. Biosurfactants were produced using 1% yeast extract in tap water as production medium at 24 h in flask and 12 h in bioreactor. Using 16S rRNA gene sequence (1515 bp) and BCL card (bioMérieux VITEK®), strain was identified as Bacillus sp. Crude biosurfactant reduced the surface tension of distilled water to 31.32 ± 0.93 mN/m with CMC value of 0.3 mg/ml. Cell free supernatant showed excellent emulsification and oil displacement activity with stability up to 160 °C, pH 6-12 and 50 g/L NaCl conc. Biosurfactants were characterized using FTIR, TLC, HPLC LC-MS and NMR spectroscopy. Cell free supernatant reduced the contact angle of distilled water droplet from 117° to 52.28° and of 2% pesticide from 78.77° to 73.42° while 750 μg/ml of crude biosurfactant reduced from 66.06° to 56.33° for 2% pesticide and recovered 35% ULO and 12% HWCO from the contaminated sand. To our best of knowledge, this is the first report of thermo stable fatty alkene as a biosurfactant and is structurally different from previously reported, with having potential application in agriculture, oil recovery and bioremediation.
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Affiliation(s)
- Hari Ram
- NCIM Resource Center, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Amit Kumar Sahu
- NCIM Resource Center, CSIR-National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Madhukar S Said
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Arun G Banpurkar
- Department of Physics, Savitribai Phule Pune University, Pune, 411007, India
| | - Jayant M Gajbhiye
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Syed G Dastager
- NCIM Resource Center, CSIR-National Chemical Laboratory, Pune, 411008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune, 411008, India.
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Pan H, Tian X, Shao M, Xie Y, Huang H, Hu J, Ju J. Genome mining and metabolic profiling illuminate the chemistry driving diverse biological activities of Bacillus siamensis SCSIO 05746. Appl Microbiol Biotechnol 2019; 103:4153-4165. [DOI: 10.1007/s00253-019-09759-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 03/07/2019] [Accepted: 03/10/2019] [Indexed: 10/27/2022]
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Ma Z, Hu J. Complete genome sequence of a marine-sediment-derived bacterial strain Bacillus velezensis SH-B74, a cyclic lipopeptides producer and a biopesticide. 3 Biotech 2019; 9:162. [PMID: 30944809 PMCID: PMC6443728 DOI: 10.1007/s13205-019-1694-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 03/26/2019] [Indexed: 10/27/2022] Open
Abstract
A marine-sediment sample-derived strain Bacillus velezensis SH-B74 has the capacity to produce cyclic lipopeptides (CLPs), and these CLPs secreted by the strain show biological activities against various pests under both in vitro and in planta conditions, such evidence has supported that the strain SH-B74 is a biopesticide. To get a better insight into the mechanisms on the control of the pesticides by the strain, a genome sequencing project has been applied to the genomic DNA of the strain SH-B74. The results show that the strain SH-B74 has a chromosome size of 4,042,190 bp, with a GC content of 46.5%, in addition, the strain contains a 61,634 bp plasmid pSH-B74, with a GC content of 40.8%. Data from bioinformatic analysis reveal that the strain SH-B74 has genes with the capacity to increase environmental adaptation, promote the rhizosphere fitnesses and secrete a spectrum of antibiotics, including nonribosomal peptide synthetases (NRPSs)-derived CLPs bacillopeptin, plipastatin, and surfactin. The presence of CLPs in the bacterial cultures of the strain SH-B74 was confirmed further by LC-MS analysis. Thus, genome sequencing and analyses together with chemical analysis reveal the promising perspectives of the strain SH-B74 that are of spectacular importance to its trait as a plant beneficial microbe to be used in agriculture practices.
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Affiliation(s)
- Zongwang Ma
- College of Life Science, Northwest Normal University, Lanzhou, 730070 China
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016 China
| | - Jiangchun Hu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016 China
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Simultaneous quantification of lipopeptide isoforms by UPLC-MS in the fermentation broth from Bacillus subtilis CNPMS22. Anal Bioanal Chem 2018; 410:6827-6836. [PMID: 30074087 DOI: 10.1007/s00216-018-1281-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/04/2018] [Accepted: 07/17/2018] [Indexed: 01/28/2023]
Abstract
The rapid and accurate quantification of lipopeptide families in biological samples are challenging. We present the development and validation of a method for simultaneous quantification of three families of lipopeptides (iturins, fengycins, and surfactins) and their isoforms, as well as the homologous series. The method was optimized in UPLC-MS for a column temperature at 65 °C, injection volume of 5 μL, and sample temperature of 10 °C. The SIM mode was used for detection and quantification of lipopeptides exhibiting ions [M + H]+ and [M + 2H]2+. Since the maximum mass detection threshold of the equipment is 1250 Da and the fengycins have ions between 1435 and 1505 Da, the ions [M + 2H]2+ were chosen for fengycin identification. The monitored ions were as follows: m/z 1043.5, 1057.5, 1071.5, 718.3, 725.4, 739.4, 732.4, 746.4, 753.4, 1008.6, 1022.6, and 1036.6. The compounds were separated by reverse-phase chromatography using a C18 analytical column in a total time of 19 min. Standard curves were linear with rw 0.99 for all analytes. Intra- and inter-day precision for samples (50, 250, and 750 μg L-1) were within recommended limits. The proposed analytical method was capable of simultaneously quantifying 12 isoforms and homologous series of lipopeptide families in biological samples, thus making it an important industrial tool in the evaluation of lipopeptide production processes. Graphical abstract ᅟ.
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Liang X, Shi R, Radosevich M, Zhao F, Zhang Y, Han S, Zhang Y. Anaerobic lipopeptide biosurfactant production by an engineered bacterial strain for in situ microbial enhanced oil recovery. RSC Adv 2017. [DOI: 10.1039/c7ra02453c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Anaerobic lipopeptide biosurfactant production by engineered bacterial strain FA-2 was fulfilled forin situMEOR potential application.
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Affiliation(s)
- Xiaolong Liang
- Key Laboratory of Pollution Ecology and Environmental Engineering
- Institute of Applied Ecology
- Chinese Academy of Sciences
- Shenyang
- China
| | - Rongjiu Shi
- Key Laboratory of Pollution Ecology and Environmental Engineering
- Institute of Applied Ecology
- Chinese Academy of Sciences
- Shenyang
- China
| | - Mark Radosevich
- Biosystems Engineering & Soil Science Department
- University of Tennessee
- Knoxville
- USA
| | - Feng Zhao
- State Key Laboratory of Urban Water Resource and Environment
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150090
- China
| | - Yingyue Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering
- Institute of Applied Ecology
- Chinese Academy of Sciences
- Shenyang
- China
| | - Siqin Han
- Key Laboratory of Pollution Ecology and Environmental Engineering
- Institute of Applied Ecology
- Chinese Academy of Sciences
- Shenyang
- China
| | - Ying Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering
- Institute of Applied Ecology
- Chinese Academy of Sciences
- Shenyang
- China
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Chen Q, Liu B, Wang J, Che J, Liu G, Guan X. Antifungal Lipopeptides Produced by Bacillus sp. FJAT-14262 Isolated from Rhizosphere Soil of the Medicinal Plant Anoectochilus roxburghii. Appl Biochem Biotechnol 2016; 182:155-167. [PMID: 27854037 DOI: 10.1007/s12010-016-2317-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/30/2016] [Indexed: 11/25/2022]
Abstract
This study aimed to develop biocontrol Bacillus and explore bacterial biocontrol substances. According to the blood agar test, strain FJAT-14262 was screened as a biosurfactant-producer. The biosurfactant-producing ability of FJAT-14262 was further confirmed by the oil spreading tests because of its amphipathic character. Furthermore, its fermentation supernatant could decrease the surface tension from 74.1 to 32.7 mN m-1. Fourier transform infrared spectroscopy (FT-IR) analysis indicated that the biosurfactant produced by the strain FJAT-14262 was a kind of lipopeptides. Reverse-phase high-performance liquid chromatography (RP-HPLC) and liquid chromatography-mass spectrometry (LC-MS) analysis demonstrated that this lipopeptide contained surfactin with polar amino acids and hydrophobic fatty acid chains. Moreover, bioinformatic analysis revealed that the nonribosomal peptide synthetases genes srfAA, srfAB, and srfAC were structurally conserved in the FJAT-14262 genome. Importantly, the crude surfactant exhibited strong inhibitory activities against Fusarium oxysporum, suggesting that strain FJAT-14262 could be a potential biological control agent against Fusarium wilt.
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Affiliation(s)
- Qianqian Chen
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
- Agrobiological Resource Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, 350003, People's Republic of China
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fuzhou, Fujian, 350002, People's Republic of China
| | - Bo Liu
- Agrobiological Resource Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, 350003, People's Republic of China.
| | - Jieping Wang
- Agrobiological Resource Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, 350003, People's Republic of China
| | - Jianmei Che
- Agrobiological Resource Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, 350003, People's Republic of China
| | - Guohong Liu
- Agrobiological Resource Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, 350003, People's Republic of China
| | - Xiong Guan
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China.
- Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fuzhou, Fujian, 350002, People's Republic of China.
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Favaro G, Bogialli S, Di Gangi IM, Nigris S, Baldan E, Squartini A, Pastore P, Baldan B. Characterization of lipopeptides produced by Bacillus licheniformis using liquid chromatography with accurate tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:2237-2252. [PMID: 27487987 DOI: 10.1002/rcm.7705] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 07/21/2016] [Accepted: 07/30/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE The plant endophyte Bacillus licheniformis, isolated from leaves of Vitis vinifera, was studied to individuate and characterize the presence of bioactive lipopeptides having amino acidic structures. METHODS Crude extracts of liquid cultures were analyzed by ultra-high-performance liquid chromatography (UHPLC) coupled to a quadrupole time-of-flight (QTOF) mass analyzer. Chromatographic conditions were optimized in order to obtain an efficient separation of the different isobaric lipopeptides, avoiding merged fragmentations of co-eluted isomeric compounds and reducing possible cross-talk phenomena. Composition of the amino acids was outlined through the interpretation of the fragmentation behavior in tandem high-resolution mass spectrometry (HRMS/MS) mode, which showed both common-class and peculiar fragment ions. Both [M + H](+) and [M + Na](+) precursor ions were fragmented in order to differentiate some isobaric amino acids, i.e. Leu/Ile. Neutral losses characteristic of the iso acyl chain were also evidenced. RESULTS More than 90 compounds belonging to the classes of surfactins and lichenysins, known as biosurfactant molecules, were detected. Sequential LC/HRMS/MS analysis was used to identify linear and cyclic lipopeptides, and to single out the presence of a large number of isomers not previously reported. Some critical issues related to the simultaneous selection of different compounds by the quadrupole filter were highlighted and partially solved, leading to tentative assignments of several structures. Linear lichenysins are described here for the first time. CONCLUSIONS The approach was proved to be useful for the characterization of non-target lipopeptides, and proposes a rationale MS experimental scheme aimed to investigate the difference in amino acid sequence and/or in the acyl chain of the various congeners, when standards are not available. Results expanded the knowledge about production of linear and cyclic bioactive compounds from Bacillus licheniformis, clarifying the structures of isomeric forms, and enabling the use of selected endophytes to produce fungicides for eco-friendly biocontrol. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Gabriella Favaro
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy.
| | - Sara Bogialli
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Iole Maria Di Gangi
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Sebastiano Nigris
- Department of Biology, University of Padova, via Ugo Bassi 58/B, 35131, Padova, Italy
| | - Enrico Baldan
- Department of Biology, University of Padova, via Ugo Bassi 58/B, 35131, Padova, Italy
| | - Andrea Squartini
- Department of Agronomy, Animals, Food, Natural Resources and Environment, University of Padova, Viale dell'Università 16, 35020, Legnaro (PD), Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Barbara Baldan
- Department of Biology, University of Padova, via Ugo Bassi 58/B, 35131, Padova, Italy
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Pang X, Zhao J, Fang X, Liu H, Zhang Y, Cen S, Yu L. Surfactin derivatives from Micromonospora sp. CPCC 202787 and their anti-HIV activities. J Antibiot (Tokyo) 2016; 70:105-108. [PMID: 27301660 DOI: 10.1038/ja.2016.63] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/12/2016] [Accepted: 04/28/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Xu Pang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jianyuan Zhao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiaomei Fang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Hongyu Liu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yuqin Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Shan Cen
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Liyan Yu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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