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Pandey C, Prabha D, Negi YK, Maheshwari DK, Dheeman S, Gupta M. Macrolactin a mediated biocontrol of Fusarium oxysporum and Rhizoctonia solani infestation on Amaranthus hypochondriacus by Bacillus subtilis BS-58. Front Microbiol 2023; 14:1105849. [PMID: 36970695 PMCID: PMC10032343 DOI: 10.3389/fmicb.2023.1105849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/06/2023] [Indexed: 02/25/2023] Open
Abstract
Plant diseases are one of the main hurdles for successful crop production and sustainable agriculture development world-wide. Though several chemical measures are available to manage crop diseases, many of them have serious side effects on humans, animals and the environment. Therefore, the use of such chemicals must be limited by using effective and eco-friendly alternatives. In view of the same, we found a Bacillus subtilis BS-58 as a good antagonist towards the two most devastating phytopathogens, i.e., Fusarium oxysporum and Rhizoctonia solani. Both the pathogens attack several agricultural crops (including amaranth) and induce a variety of infections in them. The findings of scanning electron microscopy (SEM) in this study suggested that B. subtilis BS-58 could inhibit the growth of both the pathogenic fungi by various means such as perforation, cell wall lysis, and cytoplasmic disintegration in the fungal hyphae. Thin-layer chromatography, LC–MS and FT-IR data revealed the antifungal metabolite to be macrolactin A with a molecular weight of 402 Da. Presence of the mln gene in the bacterial genome further endorsed that the antifungal metabolite produced by BS-58 was macrolactin A. Pot trial conducted in the present study showed that seed treatment by BS-58 effectively reduced seedling mortality (54.00 and 43.76%) in amaranth, when grown in pathogen infested soil (F. oxysporum and R. solani, respectively), when compared to their respective negative controls. Data also revealed that the disease suppression ability of BS-58 was almost equivalent to the recommended fungicide, carbendazim. SEM analysis of roots of the seedlings recovered from pathogenic attack substantiated the hyphal disintegration by BS-58 and prevention of amaranth crop. The findings of this study conclude that macrolactin A produced by B. subtilis BS-58 is responsible for the inhibition of both the phytopathogens and the suppression of the diseases caused by them. Being native and target specific, such strains under suitable conditions, may result in ample production of antibiotic and better suppression of the disease.
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Affiliation(s)
- Chitra Pandey
- Department of Basic Sciences, College of Forestry (VCSG UUHF), Tehri Garhwal, Uttarakhand, India
- Department of Botany and Microbiology, Gurukula Kangri University, Haridwar, Uttarakhand, India
| | - Deepti Prabha
- Department of Seed Science and Technology, School of Agriculture and Allied Sciences, HNB Garhwal University, Srinagar, Pauri Garhwal, Uttarakhand, India
| | - Yogesh Kumar Negi
- Department of Basic Sciences, College of Forestry (VCSG UUHF), Tehri Garhwal, Uttarakhand, India
- *Correspondence: Yogesh Kumar Negi,
| | - Dinesh Kumar Maheshwari
- Department of Botany and Microbiology, Gurukula Kangri University, Haridwar, Uttarakhand, India
| | - Shrivardhan Dheeman
- Department of Botany and Microbiology, Gurukula Kangri University, Haridwar, Uttarakhand, India
| | - Monika Gupta
- Amity Institute of Microbial Technology, Amity University, Noida, Uttar Pradesh, India
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Liang L, Fu Y, Deng S, Wu Y, Gao M. Genomic, Antimicrobial, and Aphicidal Traits of Bacillus velezensis ATR2, and Its Biocontrol Potential against Ginger Rhizome Rot Disease Caused by Bacillus pumilus. Microorganisms 2021; 10:microorganisms10010063. [PMID: 35056513 PMCID: PMC8778260 DOI: 10.3390/microorganisms10010063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/10/2021] [Accepted: 12/23/2021] [Indexed: 11/27/2022] Open
Abstract
Ginger rhizome rot disease, caused by the pathogen Bacilluspumilus GR8, could result in severe rot of ginger rhizomes and heavily threaten ginger production. In this study, we identified and characterized a new Bacillus velezensis strain, designated ATR2. Genome analysis revealed B. velezensis ATR2 harbored a series of genes closely related to promoting plant growth and triggering plant immunity. Meanwhile, ten gene clusters involved in the biosynthesis of various secondary metabolites (surfactin, bacillomycin, fengycin, bacillibactin, bacilysin, difficidin, macrolactin, bacillaene, plantazolicin, and amylocyclicin) and two clusters encoding a putative lipopeptide and a putative phosphonate which might be explored as novel bioactive compounds were also present in the ATR2 genome. Moreover, B. velezensis ATR2 showed excellent antagonistic activities against multiple plant pathogenic bacteria, plant pathogenic fungi, human pathogenic bacteria, and human pathogenic fungus. B. velezensis ATR2 was also efficacious in control of aphids. The antagonistic compound from B. velezensis ATR2 against B.pumilus GR8 was purified and identified as bacillomycin D. In addition, B. velezensis ATR2 exhibited excellent biocontrol efficacy against ginger rhizome rot disease on ginger slices. These findings showed the potential of further applications of B. velezensis ATR2 as a biocontrol agent in agricultural diseases and pests management.
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Affiliation(s)
- Leiqin Liang
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; (L.L.); (Y.F.); (S.D.); (Y.W.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yajuan Fu
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; (L.L.); (Y.F.); (S.D.); (Y.W.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Sangsang Deng
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; (L.L.); (Y.F.); (S.D.); (Y.W.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yan Wu
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; (L.L.); (Y.F.); (S.D.); (Y.W.)
| | - Meiying Gao
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; (L.L.); (Y.F.); (S.D.); (Y.W.)
- Correspondence:
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Chu D, Ilyas N, Peng L, Wang X, Wang D, Xu Z, Gao Q, Tan X, Zhang C, Li Y, Yuan Y. Genomic insights on fighting bacterial wilt by a novel Bacillus amyloliquefaciens strain Cas02. Microb Biotechnol 2021; 15:1152-1167. [PMID: 34570959 PMCID: PMC8966013 DOI: 10.1111/1751-7915.13925] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 09/03/2021] [Accepted: 09/04/2021] [Indexed: 11/28/2022] Open
Abstract
Bacterial wilt, caused by the Ralstonia solanacearum, can infect several economically important crops. However, the management strategies available to control this disease are limited. Plant growth-promoting rhizobacteria (PGPR) have been considered promising biocontrol agents. In this study, Bacillus amyloliquefaciens strain Cas02 was isolated from the rhizosphere soil of healthy tobacco plants and evaluated for its effect on plant growth promotion and bacterial wilt suppression. Strain Cas02 exhibited several growth-promoting-related features including siderophore production, cellulase activity, protease activity, ammonia production and catalase activity. Moreover, strain Cas02 showed a significant inhibitory growth effect on R. solanacearum, and its active substances were separated and identified to be macrolactin A and macrolactin W by HPLC-DAD-ESI-MS/MS. Both greenhouse and field experiments demonstrated a good performance of Cas02 in plant growth promotion and bacterial wilt suppression. To explore the underlying genetic mechanisms, complete genome sequencing was performed and the gene clusters responsible for antibacterial metabolites expression were identified. Overall, these findings suggest that the strain Cas02 could be a potential biocontrol agent in bacterial wilt management and a source of antimicrobial compounds for further exploitation.
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Affiliation(s)
- Depeng Chu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Naila Ilyas
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Lijuan Peng
- Yunnan Tobacco Quality Supervision and Test Station, Kunming, 650106, China
| | - Xiaoqiang Wang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Dongkun Wang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Zongchang Xu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Qiang Gao
- Yishui Agricultural Technology Demonstration Park, Linyi, 276400, China
| | - Xiaolei Tan
- Yishui Agricultural Technology Demonstration Park, Linyi, 276400, China
| | - Chengsheng Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Yiqiang Li
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Yuan Yuan
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
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Bharadwaj KK, Sarkar T, Ghosh A, Baishya D, Rabha B, Panda MK, Nelson BR, John AB, Sheikh HI, Dash BP, Edinur HA, Pati S. Macrolactin A as a Novel Inhibitory Agent for SARS-CoV-2 M pro: Bioinformatics Approach. Appl Biochem Biotechnol 2021; 193:3371-3394. [PMID: 34212286 PMCID: PMC8248955 DOI: 10.1007/s12010-021-03608-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 06/21/2021] [Indexed: 12/27/2022]
Abstract
COVID-19 is a disease that puts most of the world on lockdown and the search for therapeutic drugs is still ongoing. Therefore, this study used in silico screening to identify natural bioactive compounds from fruits, herbaceous plants, and marine invertebrates that are able to inhibit protease activity in SARS-CoV-2 (PDB: 6LU7). We have used extensive screening strategies such as drug likeliness, antiviral activity value prediction, molecular docking, ADME, molecular dynamics (MD) simulation, and MM/GBSA. A total of 17 compounds were shortlisted using Lipinski’s rule in which 5 compounds showed significant predicted antiviral activity values. Among these 5, only 2 compounds, Macrolactin A and Stachyflin, showed good binding energy of −9.22 and −8.00 kcal/mol, respectively, within the binding pocket of the Mpro catalytic residues (HIS 41 and CYS 145). These two compounds were further analyzed to determine their ADME properties. The ADME evaluation of these 2 compounds suggested that they could be effective in developing therapeutic drugs to be used in clinical trials. MD simulations showed that protein–ligand complexes of Macrolactin A and Stachyflin with the target receptor (6LU7) were stable for 100 nanoseconds. The MM/GBSA calculations of Mpro–Macrolactin A complex indicated higher binding free energy (−42.58 ± 6.35 kcal/mol). Dynamic cross-correlation matrix (DCCM) and principal component analysis (PCA) on the residual movement in the MD trajectories further confirmed the stability of Macrolactin A bound state with 6LU7. In conclusion, this study showed that marine natural compound Macrolactin A could be an effective therapeutic inhibitor against SARS-CoV-2 protease (6LU7). Additional in vitro and in vivo validations are strongly needed to determine the efficacy and therapeutic dose of Macrolactin A in biological systems.
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Affiliation(s)
- Kaushik Kumar Bharadwaj
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Tanmay Sarkar
- Malda Polytechnic, West Bengal State Council of Technical Education, Govt. of West Bengal, Malda, West Bengal, 732102, India.,Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata, West Bengal, 700038, India
| | - Arabinda Ghosh
- Microbiology Division, Department of Botany, Gauhati University, Guwahati, Assam, ,781014, India
| | - Debabrat Baishya
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Bijuli Rabha
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Manasa Kumar Panda
- Environment and Sustainability Department, CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India
| | - Bryan Raveen Nelson
- Institute of Tropical Biodiversity and Sustainable Development, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.,Research Divisions, Association for Biodiversity Conservation and Research, Balasore, Odisha, 756001, India
| | - Akbar B John
- INOCEM Research Station, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
| | - Hassan I Sheikh
- Faculty of Fisheries and Food Science, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Bisnu Prasad Dash
- Department of Biosciences and Biotechnology, Fakir Mohan University, 756089, Balasore, India
| | - Hisham Atan Edinur
- Forensic Science Programme, School of Health Sciences, University Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Siddhartha Pati
- Research Divisions, Association for Biodiversity Conservation and Research, Balasore, Odisha, 756001, India. .,Centre of Excellence (OHEPEE), Khallikote University, Berhampur, Ganjam, Odisha, 761008, India.
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Dat TTH, Cuc NTK, Cuong PV, Smidt H, Sipkema D. Diversity and Antimicrobial Activity of Vietnamese Sponge-Associated Bacteria. Mar Drugs 2021; 19:md19070353. [PMID: 34206202 PMCID: PMC8307940 DOI: 10.3390/md19070353] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 12/13/2022] Open
Abstract
This study aimed to assess the diversity and antimicrobial activity of cultivable bacteria associated with Vietnamese sponges. In total, 460 bacterial isolates were obtained from 18 marine sponges. Of these, 58.3% belonged to Proteobacteria, 16.5% to Actinobacteria, 18.0% to Firmicutes, and 7.2% to Bacteroidetes. At the genus level, isolated strains belonged to 55 genera, of which several genera, such as Bacillus, Pseudovibrio, Ruegeria, Vibrio, and Streptomyces, were the most predominant. Culture media influenced the cultivable bacterial composition, whereas, from different sponge species, similar cultivable bacteria were recovered. Interestingly, there was little overlap of bacterial composition associated with sponges when the taxa isolated were compared to cultivation-independent data. Subsequent antimicrobial assays showed that 90 isolated strains exhibited antimicrobial activity against at least one of seven indicator microorganisms. From the culture broth of the isolated strain with the strongest activity (Bacillus sp. M1_CRV_171), four secondary metabolites were isolated and identified, including cyclo(L-Pro-L-Tyr) (1), macrolactin A (2), macrolactin H (3), and 15,17-epoxy-16-hydroxy macrolactin A (4). Of these, compounds 2-4 exhibited antimicrobial activity against a broad spectrum of reference microorganisms.
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Affiliation(s)
- Ton That Huu Dat
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
- Correspondence: (T.T.H.D.); (D.S.); Tel.: +84-94-949-2778 (T.T.H.D.); +31-317-483-113 (D.S.)
| | - Nguyen Thi Kim Cuc
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
| | - Pham Viet Cuong
- Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang, Hue City, Thua Thien Hue 531600, Vietnam; (N.T.K.C.); (P.V.C.)
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
| | - Detmer Sipkema
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands;
- Correspondence: (T.T.H.D.); (D.S.); Tel.: +84-94-949-2778 (T.T.H.D.); +31-317-483-113 (D.S.)
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Xiao F, Dong S, Liu Y, Feng Y, Li H, Yun CH, Cui Q, Li W. Structural Basis of Specificity for Carboxyl-Terminated Acyl Donors in a Bacterial Acyltransferase. J Am Chem Soc 2020; 142:16031-16038. [PMID: 32803979 DOI: 10.1021/jacs.0c07331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Macrolactins (MLNs) are a class of important antimacular degeneration and antitumor agents. Malonylated/succinylated MLNs are even more important due to their efficacy in overcoming multi-drug-resistant bacteria. However, which enzyme catalyzes this reaction remains enigmatic. Herein, we deciphered a β-lactamase homologue BmmI to be responsible for this step. BmmI could specifically attach C3-C5 alkyl acid thioesters onto 7-OH of MLN A and also exhibits substrate promiscuity toward acyl acceptors with different scaffolds. The crystal structure of BmmI covalently linked to the succinyl group and systematic mutagenesis highlighted the role of oxyanion holelike geometry in the recognition of carboxyl-terminated acyl donors. The engineering of this geometry expanded its substrate scope, with the R166A/G/Q variants recognizing up to C12 alkyl acid thioester. The structure of BmmI with acyl acceptor MLN A revealed the importance of Arg292 in the recognition of macrolide substrates. Moreover, the mechanism of the BmmI-catalyzed acyltransfer reaction was established, unmasking the deft role of Lys76 in governing acyl donors as well as catalysis. Our studies uncover the delicate mechanism underlying the substrate selectivity of acyltransferases, which would guide rational enzyme engineering for drug development.
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Affiliation(s)
- Fei Xiao
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 266003 Qingdao, China
| | | | - Yang Liu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 266003 Qingdao, China
| | | | - Huayue Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 266003 Qingdao, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237 Qingdao, China
| | - Cai-Hong Yun
- Department of Biochemistry and Biophysics & Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, 38 Xueyuan Road, 100191 Beijing, China
| | | | - Wenli Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 266003 Qingdao, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237 Qingdao, China
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Sapkota M, Gao M, Li L, Yang M, Shrestha SK, Choi H, Soh Y. Macrolactin A protects against LPS-induced bone loss by regulation of bone remodeling. Eur J Pharmacol 2020; 883:173305. [PMID: 32673673 DOI: 10.1016/j.ejphar.2020.173305] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/19/2022]
Abstract
An imbalance between bone resorption and bone formation leads to several kinds of bone diseases such as rheumatoid arthritis, osteoporosis and Paget's disease. The imbalance between bone formations relative to bone resorption is responsible in bone remodeling. Several studies have suggested that macrolactin A (MA) has potent anti-inflammatory, anti-cancer and anti-angiogenic effects in various cell types. We investigate whether macrolactin A (MA) could inhibit bone loss and enhance bone formation. We used bone marrow monocytes/macrophages (BMMs) cells to study osteoclast activity and MC3T3-E1 cells to study osteoblast activity. MA suppressed tartrate resistant acid phosphatase (TRAP) positive multinucleated cells in a concentration-dependent manner, as well as at a specific time point. MA markedly reduced bone resorption activity and F-actin ring formation. Moreover, MA markedly suppressed receptor activator of nuclear factor k-B ligand (RANKL)-induced osteoclastogenic marker genes and transcription factors in-vitro. MA repressed osteoclast differentiation via activation of the phosphoinositide kinase-3/Akt, extracellular signal-regulated kinase 1/2 (ERK 1/2), c-Jun N-terminal kinase (JNK), nuclear factor of activated T cells, cytoplasmic 1 (NFATc1) and c-Fos signaling pathways. MA enhanced pre-osteoblast cell differentiation on mineralization activity, alkaline phosphatase (ALP) activity, and the expression of osteoblastogenic markers including osterix, RUNX-2, SMAD4, BMP-2, and ALP. Importantly, MA repressed lipopolysaccharide (LPS)-induced inflammatory bone loss in mice as shown by TRAP staining of femurs and μCT analysis. Therefore, MA could be a promising candidate for the inhibition and management of osteoporosis, arthritis, and bone lytic diseases.
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Affiliation(s)
- Mahesh Sapkota
- School of Pharmacy, Jeonbuk National University, Jeonju, 561-756, South Korea
| | - Ming Gao
- College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea
| | - Liang Li
- School of Pharmacy, Jeonbuk National University, Jeonju, 561-756, South Korea
| | - Ming Yang
- School of Pharmacy, Jeonbuk National University, Jeonju, 561-756, South Korea
| | | | - Hyukjae Choi
- College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea.
| | - Yunjo Soh
- School of Pharmacy, Jeonbuk National University, Jeonju, 561-756, South Korea.
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Mechanism of Antibacterial Activity of Bacillus amyloliquefaciens C-1 Lipopeptide toward Anaerobic Clostridium difficile. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3104613. [PMID: 32190658 PMCID: PMC7073505 DOI: 10.1155/2020/3104613] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/13/2020] [Accepted: 02/04/2020] [Indexed: 02/06/2023]
Abstract
Probiotics may offer an attractive alternative for standard antibiotic therapy to treat Clostridium difficile infections (CDI). In this study, the antibacterial mechanism in vitro of newly isolated B. amyloliquefaciens C-1 against C. difficile was investigated. The lipopeptides surfactin, iturin, and fengycin produced by C-1 strongly inhibited C. difficile growth and viability. Systematic research of the bacteriostatic mechanism showed that the C-1 lipopeptides damage the integrity of the C. difficile cell wall and cell membrane. In addition, the lipopeptide binds to C. difficile genomic DNA, leading to cell death. Genome resequencing revealed many important antimicrobial compound-encoding clusters, including six nonribosomal peptides (surfactins (srfABCD), iturins (ituABCD), fengycins (fenABCDE), bacillibactin (bmyABC), teichuronic, and bacilysin) and three polyketides (bacillaene (baeEDLMNJRS), difficidin (difABCDEFGHIJ), and macrolactin (mlnABCDEFGHI)). In addition, there were other beneficial genes, such as phospholipase and seven siderophore biosynthesis gene clusters, which may contribute synergistically to the antibacterial activity of B. amyloliquefaciens C-1. We suggest that proper application of antimicrobial peptides may be effective in C. difficile control.
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Kaspar F, Neubauer P, Gimpel M. Bioactive Secondary Metabolites from Bacillus subtilis: A Comprehensive Review. JOURNAL OF NATURAL PRODUCTS 2019; 82:2038-2053. [PMID: 31287310 DOI: 10.1021/acs.jnatprod.9b00110] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bacillus subtilis is widely underappreciated for its inherent biosynthetic potential. This report comprehensively summarizes the known bioactive secondary metabolites from B. subtilis and highlights potential applications as plant pathogen control agents, drugs, and biosurfactants. B. subtilis is well known for the production of cyclic lipopeptides exhibiting strong surfactant and antimicrobial activities, such as surfactins, iturins, and fengycins. Several polyketide-derived macrolides as well as nonribosomal peptides, dihydroisocoumarins, and linear lipopeptides with antimicrobial properties have been reported, demonstrating the biosynthetic arsenal of this bacterium. Promising efforts toward the application of B. subtilis strains and their natural products in areas of agriculture and medicine are underway. However, industrial-scale availability of these compounds is currently limited by low fermentation yields and challenging accessibility via synthesis, necessitating the development of genetically engineered strains and optimized cultivation processes. We hope that this review will attract renewed interest in this often-overlooked bacterium and its impressive biosynthetic skill set.
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Affiliation(s)
- Felix Kaspar
- Institute of Biotechnology , Technical University of Berlin , Ackerstraße 76 , 13355 Berlin , Germany
| | - Peter Neubauer
- Institute of Biotechnology , Technical University of Berlin , Ackerstraße 76 , 13355 Berlin , Germany
| | - Matthias Gimpel
- Institute of Biotechnology , Technical University of Berlin , Ackerstraße 76 , 13355 Berlin , Germany
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Wu J, Xu G, Jin Y, Sun C, Zhou L, Lin G, Xu R, Wei L, Fei H, Wang D, Chen J, Lv Z, Liu K. Isolation and characterization of Bacillus sp. GFP-2, a novel Bacillus strain with antimicrobial activities, from Whitespotted bamboo shark intestine. AMB Express 2018; 8:84. [PMID: 29785529 PMCID: PMC5962526 DOI: 10.1186/s13568-018-0614-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 05/12/2018] [Indexed: 11/13/2022] Open
Abstract
The abuse of antibiotics and following rapidly increasing of antibiotic-resistant pathogens is the serious threat to our society. Natural products from microorganism are regarded as the important substitution antimicrobial agents of antibiotics. We isolated a new strain, Bacillus sp. GFP-2, from the Chiloscyllium plagiosum (Whitespotted bamboo shark) intestine, which showed great inhibitory effects on the growth of both Gram-positive and Gram-negative bacteria. Additionally, the growth of salmon was effectively promoted when fed with inactivated strain GFP-2 as the inhibition agent of pathogenic bacteria. The genes encoding antimicrobial peptides like LCI, YFGAP and hGAPDH and gene clusters for secondary metabolites and bacteriocins, such as difficidin, bacillibactin, bacilysin, surfactin, butirosin, macrolactin, bacillaene, fengycin, lanthipeptides and LCI, were predicted in the genome of Bacillus sp. GFP-2, which might be expressed and contribute to the antimicrobial activities of this strain. The gene encoding β-1,3-1,4-glucanase was successfully cloned from the genome and this protein was detected in the culture supernatant of Bacillus sp. GFP-2 by the antibody produced in rabbit immunized with the recombinant β-1,3-1,4-glucanase, indicating that this strain could express β-1,3-1,4-glucanase, which might partially contribute to its antimicrobial activities. This study can enhance a better understanding of the mechanism of antimicrobial activities in genus Bacillus and provide a useful material for the biotechnology study in antimicrobial agent development.
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Díaz-Cárdenas C, Cantillo A, Rojas LY, Sandoval T, Fiorentino S, Robles J, Ramos FA, Zambrano MM, Baena S. Microbial diversity of saline environments: searching for cytotoxic activities. AMB Express 2017; 7:223. [PMID: 29273919 PMCID: PMC5741568 DOI: 10.1186/s13568-017-0527-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/13/2017] [Indexed: 02/06/2023] Open
Abstract
In order to select halophilic microorganisms as a source of compounds with cytotoxic activities, a total of 135 bacterial strains were isolated from water and sediment samples collected from the Zipaquirá salt mine in the Colombian Andes. We determined the cytotoxic effects of 100 crude extracts from 54 selected organisms on the adherent murine mammary cell carcinoma 4T1 and human mammary adenocarcinoma MCF-7 cell lines. These extracts were obtained from strains of Isoptericola, Ornithinimicrobium, Janibacter, Nesterenkonia, Alkalibacterium, Bacillus, Halomonas, Chromohalobacter, Shewanella, Salipiger, Martellela, Oceanibaculum, Caenispirillum and Labrenzia. The extracts of 23 strains showed an IC50 of less than 100 μg mL−1. They were subsequently analyzed by LC/MS allowing dereplication of 20 compounds. The cytotoxic effect was related to a complex mixture of diketopiperazines present in many of the extracts analyzed. The greatest cytotoxic activity against both of the evaluated cell lines was obtained from the chloroform extract of Labrenzia aggregata USBA 371 which had an IC50 < 6 μg mL−1. Other extracts with high levels of cytotoxic activity were obtained from Bacillus sp. (IC50 < 50 μg mL−1) which contained several compounds such as macrolactin L and A, 7-O-succinoylmacrolactin F and iturin. Shewanella chilikensis USBA 344 also showed high levels of cytotoxic activity against both cell lines in the crude extract: an IC50 < 15 μg mL−1 against the 4T1 cell line and an IC50 < 68 μg mL−1 against the MCF-7 cell line. Nesterenkonia sandarakina CG 35, which has an IC50 of 118 µg mL−1 against 4T1, is a producer of diketopiperazines and 1-acetyl-β-carboline. Also, Ornithinimicrobium kibberense CG 24, which has IC50 < 50 μg mL−1, was a producer of diketopiperazines and lagunamycin. Our study demonstrates that these saline environments are habitats of halophilic and halotolerant bacteria that have previously unreported cytotoxic activity.
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12
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Jin J, Hwang K, Joo JD, Han JH, Kim CY. Combination therapy of 7-O-succinyl macrolactin A tromethamine salt and temozolomide against experimental glioblastoma. Oncotarget 2017; 9:2140-2147. [PMID: 29416760 PMCID: PMC5788628 DOI: 10.18632/oncotarget.23295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/05/2017] [Indexed: 11/25/2022] Open
Abstract
7-O-succinyl macrolactin A has shown anti-inflammatory, anti-angiogenesis, and anti-metastatic effects. It also exhibits strong suppression of tumor growth. In our previous study, we assessed the anti-neoplastic effects of 7-O-succinyl macrolactin A tromethamine salt (SMA salt) on a glioma cell line. Moreover, according to our data, SMA salt might be contributed to the inhibitory effects on migration and invasion, as well as a cytotoxic effect on the glioblastoma cell lines. In the present study, we investigated the anti-tumor effects of combination therapy with SMA salt and temozolomide (TMZ) in glioblastoma cell lines. The combination therapy affected cell viability significantly, decreasing in glioblastoma cell lines. In cell migration assays, combination therapy showed more inhibitory effects than TMZ in these cell lines. The tumor volume was significantly decreased in the combination group compared with both TMZ and control groups by using the orthotopic mouse model. The effects of combination therapy with SMA salt and TMZ attributed to the inhibition of migration, invasion activities and anti-tumor effects. SMA salt could be one of the promising candidates for combination therapy in clinical settings.
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Affiliation(s)
- Jun Jin
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea
| | - Kihwan Hwang
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea
| | - Jin-Deok Joo
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea
| | - Jung Ho Han
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea
| | - Chae-Yong Kim
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea
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13
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Noh K, Kang ΨW. Calculation of a First-In-Man Dose of 7- O-Succinyl Macrolactin A Based on Allometric Scaling of Data from Mice, Rats, and Dogs. Biomol Ther (Seoul) 2017; 25:648-658. [PMID: 28274094 PMCID: PMC5685435 DOI: 10.4062/biomolther.2016.192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 12/08/2016] [Accepted: 01/09/2017] [Indexed: 11/06/2022] Open
Abstract
7-O-Succinyl macrolactin A (SMA) exerts several pharmacological effects including anti-bacterial, anti-inflammation, and anti-cancer activities. Recently, SMA has been extensively evaluated as an anti-cancer drug. Thus, the objectives of the present study were to characterise the pharmacokinetics of SMA via both non-compartmental and compartmental analysis in mice, rats, and dogs, and to derive an appropriate first-in-man dose based on allometric scaling of the animal data. The time courses of plasma SMA concentrations after intravenous administration to rats and dogs were analysed retrospectively, as were data collected after intraperitoneal SMA injection in mice. Pharmacokinetic parameters were estimated via both noncompartmental and compartmental analysis, and were correlated with body weight and/or the potential maximum life-span. The clearance and distribution volume of SMA in humans were predicted, and a first-in-man dose proposed. A two-compartment model best described the time courses of SMA plasma concentrations after a saturation elimination process was applied to fit the dataset obtained from rats. Incorporation of the maximum potential life-span during allometric scaling was required to improve the estimation of human clearance. The SMA clearance and the distribution volume in the steady state, in a 70-kg adult male, were estimated to be 30.6 L/h and 19.5 L, respectively. To meet the area under the curve (AUC) required for anti-tumour activity, a dose of 100 mg (∼1.5 mg/kg) was finally proposed as the first dose for a 70-kg human. Although toxicological profiles derived from non-clinical studies must be considered before any final decision is made, our work will facilitate clinical studies on SMA.
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Affiliation(s)
- Keumhan Noh
- College of Pharmacy, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Ψ Wonku Kang
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
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14
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Li L, Sapkota M, Gao M, Choi H, Soh Y. Macrolactin F inhibits RANKL-mediated osteoclastogenesis by suppressing Akt, MAPK and NFATc1 pathways and promotes osteoblastogenesis through a BMP-2/smad/Akt/Runx2 signaling pathway. Eur J Pharmacol 2017; 815:202-209. [PMID: 28919027 DOI: 10.1016/j.ejphar.2017.09.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/08/2017] [Accepted: 09/12/2017] [Indexed: 01/27/2023]
Abstract
The balance between bone formation and bone resorption is maintained by osteoblasts and osteoclasts. In the current study, macrolactin F (MF) was investigated for novel biological activity on the receptor activator of nuclear factor-κB (NF-κB) ligand (RANKL)-induced osteoclastogenesis in primary bone marrow-derived macrophages (BMMs). We found that RANKL-induced osteoclast formation and differentiation from BMMs was significantly inhibited by MF in a dose-dependent manner without cytotoxicity. RANKL-induced F-actin ring formation and bone resorption activity in BMMs which was attenuated by MF. In addition, MF suppressed the expression of osteoclast-related genes, including c-myc, RANK, tartrate-resistant acid phosphatase (TRAP), nuclear factor of activated T cells c1 (NFATc1), cathepsin K and matrix metalloproteinase 9 (MMP9). Furthermore, the protein expression NFATc1, c-Fos, MMP9, cathepsin K and phosphorylation of Jun N-terminal kinase (JNK), p38 and Akt were also down-regulated by MF treatment. Interestingly, MF promoted pre-osteoblast cell differentiation on Alizarin Red-mineralization activity, alkaline phosphatase (ALP) activity, and the expression of osteoblastogenic markers including Runx2, Osterix, Smad4, ALP, type I collagen alpha 1 (Col1α), osteopontin (OPN), and osteocalcin (OCN) via activation of the BMP-2/smad/Akt/Runx2 pathway on MC3T3-E1. Taken together, these results indicate that MF may be useful as a therapeutic agent to enhance bone health and treat osteoporosis.
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Affiliation(s)
- Liang Li
- Department of Dental Pharmacology, School of Dentistry, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Mahesh Sapkota
- Department of Dental Pharmacology, School of Dentistry, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Ming Gao
- College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Hyukjae Choi
- College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
| | - Yunjo Soh
- Department of Dental Pharmacology, School of Dentistry, Chonbuk National University, Jeonju 561-756, Republic of Korea.
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15
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Arbsuwan N, Payoungkiattikun W, Sirithorn P, Daduang S, Jangpromma N, Dhiravisit A, Hahm YT, Neubert LK, Klaynongsruang S. Purification and characterization of macrolactins and amicoumacins from Bacillus licheniformis BFP011: a new source of food antimicrobial substances. CYTA - JOURNAL OF FOOD 2017. [DOI: 10.1080/19476337.2017.1337047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Nida Arbsuwan
- Center of Excellence on Agricultural Biotechnology: (AG-BIO/PERDO-CHE), Bangkok, Thailand
- Agricultural Biotechnology Research Center for Sustainable Economy, Khon Kaen University, Khon Kaen, Thailand
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Wisarut Payoungkiattikun
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Pisan Sirithorn
- Center of Excellence on Agricultural Biotechnology: (AG-BIO/PERDO-CHE), Bangkok, Thailand
| | - Sakda Daduang
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Nisachon Jangpromma
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Office of the Dean, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Apisak Dhiravisit
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Young Tae Hahm
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Republic of Korea
| | - Lorenz Kurt Neubert
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Sompong Klaynongsruang
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
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16
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Jin J, Choi SH, Lee JE, Joo JD, Han JH, Park SY, Kim CY. Antitumor activity of 7-O-succinyl macrolactin A tromethamine salt in the mouse glioma model. Oncol Lett 2017; 13:3767-3773. [PMID: 28529591 DOI: 10.3892/ol.2017.5918] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/17/2017] [Indexed: 11/05/2022] Open
Abstract
Chemoradiotherapy with temozolomide is the current standard treatment option for patients with glioblastoma. However, the majority of patients with glioblastoma survive for <2 years. Therefore, it is necessary to develop more effective therapeutic strategies for the treatment of glioblastoma. 7-O-succinyl macrolactin A tromethamine salt (SMA salt), a macrolactin compound, is known to possess an antiangiogenic activity. The present study investigated the antitumor effects of SMA salt in the treatment of glioblastoma by evaluating in vitro and in vivo antitumor effects of SMA salt in an experimental glioblastoma model. The antitumor effects of the drug on human glioblastoma U87MG, U251MG and LN229 cell lines were assessed using in vitro cell viability, migration and invasion assays. Nude mice with established U87MG glioblastoma were assigned to either the control or SMA salt treatment group. The volume of tumors and the duration of survival were also measured. SMA salt affected cell viability and caused a concentration-dependent inhibition effect on the migration and invasion of glioblastoma cell lines. Animals in the SMA salt treatment group demonstrated a significant reduction in tumor volume and an increase in survival (P<0.05). Treatment with SMA salt presented more cytotoxic effects as well as anti-migration and anti-invasion activity compared with the control group in vitro and in vivo. These results suggest that SMA salt has significant antitumor effects on glioblastoma.
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Affiliation(s)
- Jun Jin
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Suh Hee Choi
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea
| | - Jung Eun Lee
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea
| | - Jin-Deok Joo
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jung Ho Han
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Su-Young Park
- Research and Development Center, Daewoo Pharmaceutical Ind. Co., Ltd., Busan 49393, Republic of Korea
| | - Chae-Yong Kim
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do 13620, Republic of Korea.,Department of Neurosurgery, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
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17
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Liu Y, Qin W, Liu Q, Zhang J, Li H, Xu S, Ren P, Tian L, Li W. Genome-wide identification and characterization of macrolide glycosyltransferases from a marine-derived Bacillus strain and their phylogenetic distribution. Environ Microbiol 2016; 18:4770-4781. [PMID: 27130432 DOI: 10.1111/1462-2920.13367] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 04/25/2016] [Indexed: 11/30/2022]
Abstract
Clarifying glycosyltrasferases (GTs) function is of significance for the development of GT inhibitors as drugs, and the use of GTs to glycodiversify small molecules in the search of drug leads. While many Actinomyces natural-product GTs had been functionally characterized, our understanding towards Bacillus natural-product GTs is so far very limited. Herein, genome-wide identification of macrolide GT genes from marine-derived Bacillus methylotrophicus B-9987 revealed the presence of three macrolide GT genes bmmGT1-3. While bmmGT1 was previously revealed to be involved in the biosynthesis of trans-acyltransferase (AT) polyketides compounds macrolactins (MLNs) and bacillaenes (BAEs), the functions of bmmGT2 and bmmGT3 were probed, demonstrating that they are capable to biochemically catalyze glycosylation of MLNs and BAEs as well but interestingly with different regioselectivity, affording four new MLNs analogs. Notably, further genome mining revealed that the orthologs of these three macrolide GT genes showed a regular distribution in the subtilis- and the cereus-clade Bacillus strains; interestingly, bmmGT1 orthologs only occurred in the subtilis-clade Bacillus, and they were also found in the genomes of Streptomyces strains, suggesting their close phylogenetic relationship. These results provide the first significant insight into the important roles of Bacillus macrolide GTs in the biology of the species.
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Affiliation(s)
- Yang Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Wen Qin
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Quanquan Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Jun Zhang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Huayue Li
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Shanshan Xu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Pengfei Ren
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Li Tian
- First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road Qingdao, SD, 266061, P. R. China.,Qingdao University of Science & Technology, 53 Zhen Zhou Road Qingdao, SD, 266042, P. R. China
| | - Wenli Li
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
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18
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Qin W, Liu Y, Ren P, Zhang J, Li H, Tian L, Li W. Uncovering a Glycosyltransferase Provides Insights into the Glycosylation Step during Macrolactin and Bacillaene Biosynthesis. Chembiochem 2014; 15:2747-53. [DOI: 10.1002/cbic.201402384] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Indexed: 02/06/2023]
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19
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Kim E, Shin B, Kwon KI, Bang JS, Kang W. Simultaneous determination of 7-O-succinyl macrolactin A and its active major metabolite, macrolactin A in dog plasma using high-performance liquid chromatography with UV detection. J Sep Sci 2014; 37:2833-6. [PMID: 25103477 DOI: 10.1002/jssc.201400438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/08/2014] [Accepted: 07/21/2014] [Indexed: 11/07/2022]
Abstract
We developed a method for the simultaneous quantification of 7-O-succinyl macrolactin A and its active metabolite, macrolactin A, in dog plasma. After protein precipitation with acetonitrile including flufenamic acid as an internal standard, 7-O-succinyl macrolactin A, macrolactin A, and flufenamic acid were chromatographed on a reverse-phase C18 analytical column. The mobile phase, consisting of 20 mM acetate buffer and acetonitrile, was eluted using a gradient program at 1 mL/min, and the UV absorbance was measured at 230 nm. The retention times of 7-O-succinyl macrolactin A, flufenamic acid, and macrolactin A were 3.4, 4.8, and 6.9 min, respectively. The coefficient of variation in the assay precision for both substances was less than 6%, and the accuracy ranged from 96 to 105%. This method was used to measure the concentrations of 7-O-succinyl macrolactin A and macrolactin A in dog plasma following an intravenous administration of a single dose (25 mg/kg) of 7-O-succinyl macrolactin A salt.
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Affiliation(s)
- Eunyoung Kim
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
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20
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Park S, Regmi SC, Park SY, Lee EK, Chang JH, Ku SK, Kim DH, Kim JA. Protective effect of 7-O-succinyl macrolactin A against intestinal inflammation is mediated through PI3-kinase/Akt/mTOR and NF-κB signaling pathways. Eur J Pharmacol 2014; 735:184-92. [DOI: 10.1016/j.ejphar.2014.04.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/18/2014] [Accepted: 04/06/2014] [Indexed: 12/16/2022]
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21
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Metabolic drug-drug interaction potential of macrolactin A and 7-O-succinyl macrolactin A assessed by evaluating cytochrome P450 inhibition and induction and UDP-glucuronosyltransferase inhibition in vitro. Antimicrob Agents Chemother 2014; 58:5036-46. [PMID: 24890600 DOI: 10.1128/aac.00018-14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Macrolactin A (MA) and 7-O-succinyl macrolactin A (SMA), polyene macrolides containing a 24-membered lactone ring, show antibiotic effects superior to those of teicoplanin against vancomycin-resistant enterococci and methicillin-resistant Staphylococcus aureus. MA and SMA are currently being evaluated as antitumor agents in preclinical studies in Korea. We evaluated the potential of MA and SMA for the inhibition or induction of human liver cytochrome P450 (CYP) enzymes and UDP-glucuronosyltransferases (UGTs) in vitro to assess their safety as new molecular entities. We demonstrated that MA and SMA are potent competitive inhibitors of CYP2C9, with Ki values of 4.06 μM and 10.6 μM, respectively. MA and SMA also weakly inhibited UGT1A1 activity, with Ki values of 40.1 μM and 65.3 μM, respectively. However, these macrolactins showed no time-dependent inactivation of the nine CYPs studied. In addition, MA and SMA did not induce CYP1A2, CYP2B6, or CYP3A4/5. On the basis of an in vitro-in vivo extrapolation, our data strongly suggested that MA and SMA are unlikely to cause clinically significant drug-drug interactions mediated via inhibition or induction of most of the CYPs involved in drug metabolism in vivo, except for the inhibition of CYP2C9 by MA. Similarly, MA and SMA are unlikely to inhibit the activity of UGT1A1, UGT1A4, UGT1A6, UGT1A9, and UGT2B7 enzymes in vivo. Although further investigations will be required to clarify the in vivo interactions of MA with CYP2C9-targeted drugs, our findings offer a clearer understanding and prediction of drug-drug interactions for the safe use of MA and SMA in clinical practice.
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22
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Noh K, Kim DH, Shin BS, Yun HY, Kim E, Kang W. Simultaneous determination of 7-O-succinyl macrolactin A and its metabolite macrolactin A in rat plasma using liquid chromatography coupled to tandem mass spectrometry. J Pharm Biomed Anal 2014; 98:85-9. [PMID: 24887484 DOI: 10.1016/j.jpba.2014.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 05/07/2014] [Accepted: 05/09/2014] [Indexed: 11/25/2022]
Abstract
7-O-Succinyl macrolactin A (SMA) and its major metabolite macrolactin A (MA) are generated from Bacillus polyfermenticus KJS-2. Both substances show inhibitory effects on angiogenesis and cancer cell invasion. SMA in rat plasma is known to be relatively stable at room temperature, but MA was not detected due to its instability. Therefore, a stabilizer is required to accurately measure the substance in biological rat samples. In this study, NaF and eserine were examined to determine whether they could stabilize MA to allow for accurate measurement in rat plasma. We also developed a rapid and simple chromatographic method using tandem mass spectrometry (MS/MS) for the simultaneous determination of these compounds in rat plasma. After simple protein precipitation with acetonitrile including methaqualone (internal standard), the analytes were chromatographed on a Hilic column with a mobile phase of 10mM formic acid aqueous solution, methanol, and acetonitrile (15:15:70, v/v). The accuracy and precision of the assay were in accordance with FDA regulations for the validation of bioanalytical methods. This analytical method was successfully applied to monitor plasma concentrations of both compounds over time following intravenous administration of a salt form of SMA in rats.
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Affiliation(s)
- Keumhan Noh
- College of Pharmacy, Yeungnam University, Kyoungbuk 712-749, South Korea
| | - Dong Hee Kim
- Research and Development Center, Daewoo Pharm. Co. Ltd., Busan 604-836, South Korea
| | - Beom Soo Shin
- College of Pharmacy, Catholic University of Daegu, Kyoungbuk 712-702, South Korea
| | - Hwi-yeol Yun
- College of Pharmacy, Chungnam National University, Daejeon 305-764, South Korea
| | - Eunyoung Kim
- College of Pharmacy, Chung-Ang University, Seoul 156-756, South Korea.
| | - Wonku Kang
- College of Pharmacy, Chung-Ang University, Seoul 156-756, South Korea.
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Establishment of an efficient transformation protocol and its application in marine-derived Bacillus strain. SCIENCE CHINA-LIFE SCIENCES 2014; 57:627-35. [PMID: 24771061 DOI: 10.1007/s11427-014-4632-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 12/07/2013] [Indexed: 12/31/2022]
Abstract
Marine-derived Bacillus strains have been proved to be a very promising source for natural product leads. However, transformation of environmental strains is much more difficult than that of domesticated strains. Here, we report the development of an efficient and robust electroporation-based transformation system for marine-derived Bacillus marinus B-9987, which is a macrolactin antibiotics producer and a very promising biological control agent against fungal plant diseases. The transformation efficiency was greatly enhanced 10(3)-fold by using unmethylated plasmid to bypass modification-restriction barrier, and using glycine betaine to protect cells from electrical damages during electroporation. Addition of HEPES and 2 mmol L(-1) MgCl2 further improved the efficiency by additional 2-fold, with a maximum value of 7.1×10(4) cfu/μg pHT3101. To demonstrate the feasibility and efficiency of the protocol, a green fluorescent protein reporter system was constructed; furthermore, phosphopantetheinyl transferase gene sfp, which is essential to the biosynthesis of polyketides and nonribosomal peptides, was overexpressed in B-9987, leading to increased production of macrolactin A by about 1.6-fold. In addition, this protocol is also applicable to marine-derived Bacillus licheniforms EI-34-6, indicating it could be a reference for other undomesticated Bacillus strains. To our knowledge, this is the first report regarding the transformation of marine-derived Bacillus strain.
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24
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Jung JW, Kim JM, Kwon MH, Kim DH, Kang HE. Pharmacokinetics of macrolactin A and 7-O-succinyl macrolactin A in mice. Xenobiotica 2013; 44:547-54. [PMID: 24274354 DOI: 10.3109/00498254.2013.861542] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. As promising anti-macular degeneration and/or anti-tumour agents, a better understanding of the pharmacokinetics of macrolactin A (MA) and 7-O-succinyl macrolactin A (SMA) is essential. Thus, we evaluated the pharmacokinetics of MA and SMA after intravenous, oral, or intraperitoneal administration of each drug to mice. 2. Both hepatic and extra-hepatic extractions of MA were expected based on the rapid total body clearance (CL) of MA. MA also showed a large steady-state volume of distribution (Vss) in mice. A relatively slower CL (by 54.1%) and smaller Vss (by 85.8%) were observed for SMA than for MA. In accordance with the larger Vss values of MA than of SMA, the mouse tissues studied had good affinity to MA but less affinity to SMA. 3. Both MA and SMA had an extremely low oral extent of absolute bioavailability (F). This could have been a result of the instability of MA and SMA in the gastrointestinal tract, supported by their unstable property in acidic buffer. Gastrointestinal and/or hepatic first-pass extraction of MA and SMA may be other reasons. 4. The pharmacokinetic profiles of both MA and SMA were much improved (greater AUC and F values) following intraperitoneal administration than following oral administration due to avoidance of acidic degradation and/or gastrointestinal first-pass extraction.
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Affiliation(s)
- Ji Won Jung
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea , Bucheon, Gyeonggi-Do , South Korea and
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Elkahoui S, Abdel rahim H, Tabbene O, Shaaban M, Limam F, Laatsch H. Cyclo-(His,Leu): A new microbial diketopiperazine from a terrestrialBacillus subtilisstrain B38. Nat Prod Res 2013; 27:108-16. [DOI: 10.1080/14786419.2012.660635] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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He S, Wang H, Yan X, Zhu P, Chen J, Yang R. Preparative isolation and purification of macrolactin antibiotics from marine bacterium Bacillus amyloliquefaciens using high-speed counter-current chromatography in stepwise elution mode. J Chromatogr A 2012; 1272:15-9. [PMID: 23253117 DOI: 10.1016/j.chroma.2012.11.029] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 10/30/2012] [Accepted: 11/10/2012] [Indexed: 10/27/2022]
Abstract
Preparative high-speed counter-current chromatography (HSCCC) was successfully applied to the isolation and purification of two macrolactin antibiotics from marine bacterium Bacillus amyloliquefaciens for the first time using stepwise elution with a pair of two-phase solvent systems composed of n-hexane-ethyl acetate-methanol-water at (1:4:1:4, v/v) and (3:4:3:4, v/v). The preparative HSCCC separation was performed on 300 mg of crude sample yielding macrolactin B (22.7 mg) and macrolactin A (40.4 mg) in a one-step separation, with purities over 95% as determined by HPLC. The structures of these compounds were identified by MS, (1)H NMR and (13)C NMR. Our results demonstrated that HSCCC was an efficient technique to separate marine antibiotics, which provide an approach to solve the problem of their sample availability for drug development.
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Affiliation(s)
- Shan He
- Key Laboratory of Applied Marine Biotechnology (Ningbo University), Ministry of Education, Ningbo 315211, China
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Kim JM, Jung JW, Kim DH, Kang JS, Kim CG, Kang HE. A simple and sensitive HPLC-UV determination of 7-O-succinyl macrolactin A in rat plasma and urine and its application to a pharmacokinetic study. Biomed Chromatogr 2012; 27:273-9. [PMID: 22829119 DOI: 10.1002/bmc.2786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/11/2012] [Accepted: 06/25/2012] [Indexed: 11/11/2022]
Abstract
A simple, sensitive and reproducible isocratic reversed-phase (C(18) ) high-performance liquid chromatography (HPLC) method was developed to determine 7-O-succinyl macrolactin A (SMA) in rat plasma and urine samples using UV detector set at 230 nm. Lamotrigine was used as internal standards (IS) to ensure the precision and accuracy of the method. The retention times of SMA and IS for the plasma sample were 9.2 and 4.4 min, respectively, and those for the urine samples were 7.9 and 4.3 min, respectively. The intra- and inter-day variations of the analytical responses, expressed in terms of relative standard deviation, were less than 14.9%. The accuracy, in terms of average analytical recovery, ranged from 90.4 to 119%. The lower limits of quantification of SMA in rat plasma and urine samples were 0.02 and 0.1 µg/mL, respectively. This method is applicable for the pharmacokinetic studies of SMA in rats.
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Affiliation(s)
- Ju Myung Kim
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, 420-743, South Korea
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Chen XH, Koumoutsi A, Scholz R, Eisenreich A, Schneider K, Heinemeyer I, Morgenstern B, Voss B, Hess WR, Reva O, Junge H, Voigt B, Jungblut PR, Vater J, Süssmuth R, Liesegang H, Strittmatter A, Gottschalk G, Borriss R. Comparative analysis of the complete genome sequence of the plant growth-promoting bacterium Bacillus amyloliquefaciens FZB42. Nat Biotechnol 2007; 25:1007-1014. [PMID: 17704766 DOI: 10.1002/9781118297674.ch83] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Accepted: 07/09/2007] [Indexed: 05/24/2023]
Abstract
Bacillus amyloliquefaciens FZB42 is a Gram-positive, plant-associated bacterium, which stimulates plant growth and produces secondary metabolites that suppress soil-borne plant pathogens. Its 3,918-kb genome, containing an estimated 3,693 protein-coding sequences, lacks extended phage insertions, which occur ubiquitously in the closely related Bacillus subtilis 168 genome. The B. amyloliquefaciens FZB42 genome reveals an unexpected potential to produce secondary metabolites, including the polyketides bacillaene and difficidin. More than 8.5% of the genome is devoted to synthesizing antibiotics and siderophores by pathways not involving ribosomes. Besides five gene clusters, known from B. subtilis to mediate nonribosomal synthesis of secondary metabolites, we identified four giant gene clusters absent in B. subtilis 168. The pks2 gene cluster encodes the components to synthesize the macrolactin core skeleton.
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Affiliation(s)
- Xiao Hua Chen
- Bakteriengenetik, Institut für Biologie, Humboldt Universität, Chausseestrasse 117, D-10115 Berlin, Germany
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