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Zhang S, Chen Y, Zhu J, Lu Q, Cryle MJ, Zhang Y, Yan F. Structural diversity, biosynthesis, and biological functions of lipopeptides from Streptomyces. Nat Prod Rep 2023; 40:557-594. [PMID: 36484454 DOI: 10.1039/d2np00044j] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Covering: up to 2022Streptomyces are ubiquitous in terrestrial and marine environments, where they display a fascinating metabolic diversity. As a result, these bacteria are a prolific source of active natural products. One important class of these natural products is the nonribosomal lipopeptides, which have diverse biological activities and play important roles in the lifestyle of Streptomyces. The importance of this class is highlighted by the use of related antibiotics in the clinic, such as daptomycin (tradename Cubicin). By virtue of recent advances spanning chemistry and biology, significant progress has been made in biosynthetic studies on the lipopeptide antibiotics produced by Streptomyces. This review will serve as a comprehensive guide for researchers working in this multidisciplinary field, providing a summary of recent progress regarding the investigation of lipopeptides from Streptomyces. In particular, we highlight the structures, properties, biosynthetic mechanisms, chemical and chemoenzymatic synthesis, and biological functions of lipopeptides. In addition, the application of genome mining techniques to Streptomyces that have led to the discovery of many novel lipopeptides is discussed, further demonstrating the potential of lipopeptides from Streptomyces for future development in modern medicine.
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Affiliation(s)
- Songya Zhang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yunliang Chen
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
- The Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 1000050, China.
| | - Jing Zhu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Qiujie Lu
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
| | - Max J Cryle
- Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800 Australia
- EMBL Australia, Monash University, Clayton, Victoria, 3800 Australia
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Monash University, Clayton, Victoria, 3800 Australia
| | - Youming Zhang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
| | - Fu Yan
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
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2
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Li F, Mei DH, Ren T, Song QY. Crude Extracts and Secondary Metabolites of Epichloë bromicola against Phytophthora infestans. Chem Biodivers 2023; 20:e202200841. [PMID: 36471540 DOI: 10.1002/cbdv.202200841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Potato late blight caused by Phytophthora infestans is still one of the main factors limiting potato production. Epichloë spp. can provide host plants with various resistances, which makes them show great potential in the biological control of diseases. In this study, we explored the potential biological activity of crude extracts of 20 strains of Epichloë bromicola to control P. infestans. The crude extracts of strains 1 and 8 showed significant antifungal activity with an inhibition rate of 88 % and 81 %, respectively, and showed different effects on the mycelium morphology of P. infestans observed by scanning electron microscopy. Moreover, the two crude extracts demonstrated an interesting therapeutic and protective effect on potato late blight, and none of the extracts had an adverse effect against zebrafish embryos. A total of 13 metabolites were isolated from the crude extract of strain 8, and these tested compounds showed a weak antifungal effect and the inhibition rate was less than 80 %. These findings suggested that strains 1 and 8 have potential for biocontrol of late potato blight.
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Affiliation(s)
- Fan Li
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Da-Hai Mei
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Ting Ren
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Qiu-Yan Song
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
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3
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Choudhary M, Kumar V, Naik B, Verma A, Saris PEJ, Kumar V, Gupta S. Antifungal metabolites, their novel sources, and targets to combat drug resistance. Front Microbiol 2022; 13:1061603. [PMID: 36532457 PMCID: PMC9755354 DOI: 10.3389/fmicb.2022.1061603] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/08/2022] [Indexed: 09/29/2023] Open
Abstract
Excessive antibiotic prescriptions as well as their misuse in agriculture are the main causes of antimicrobial resistance which poses a growing threat to public health. It necessitates the search for novel chemicals to combat drug resistance. Since ancient times, naturally occurring medicines have been employed and the enormous variety of bioactive chemicals found in nature has long served as an inspiration for researchers looking for possible therapeutics. Secondary metabolites from microorganisms, particularly those from actinomycetes, have made it incredibly easy to find new molecules. Different actinomycetes species account for more than 70% of naturally generated antibiotics currently used in medicine, and they also produce a variety of secondary metabolites, including pigments, enzymes, and anti-inflammatory compounds. They continue to be a crucial source of fresh chemical diversity and a crucial component of drug discovery. This review summarizes some uncommon sources of antifungal metabolites and highlights the importance of further research on these unusual habitats as a source of novel antimicrobial molecules.
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Affiliation(s)
- Megha Choudhary
- Himalayan School of Biosciences, Swami Rama Himalayan University, Dehradun, India
| | - Vijay Kumar
- Himalayan School of Biosciences, Swami Rama Himalayan University, Dehradun, India
| | - Bindu Naik
- Department of Life Sciences (Food Technology & Nutrition), Graphic Era (Deemed to be University), Dehradun, India
| | - Ankit Verma
- Himalayan School of Biosciences, Swami Rama Himalayan University, Dehradun, India
| | - Per Erik Joakim Saris
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Vivek Kumar
- Himalayan School of Biosciences, Swami Rama Himalayan University, Dehradun, India
| | - Sanjay Gupta
- Himalayan School of Biosciences, Swami Rama Himalayan University, Dehradun, India
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4
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Combining OSMAC, metabolomic and genomic methods for the production and annotation of halogenated azaphilones and ilicicolins in termite symbiotic fungi. Sci Rep 2022; 12:17310. [PMID: 36243836 PMCID: PMC9569342 DOI: 10.1038/s41598-022-22256-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 10/12/2022] [Indexed: 01/10/2023] Open
Abstract
We gathered a collection of termite mutualistic strains from French Guiana to explore the metabolites of symbiotic microorganisms. Molecular networks reconstructed from a metabolomic analysis using LC-ESI-MS/MS methodology led us to identify two families of chlorinated polyketides, i.e., azaphilones from Penicillium sclerotiorum and ilicicolins from Neonectria discophora. To define the biosynthetic pathways related to these two types of scaffolds, we used a whole genome sequencing approach followed by hybrid assembly from short and long reads. We found two biosynthetic gene clusters, including two FAD-dependent halogenases. To exploit the enzymatic promiscuity of the two identified FAD halogenases, we sought to biosynthesize novel halogenated metabolites. An OSMAC strategy was used and resulted in the production of brominated analogs of ilicicolins and azaphilones as well as iodinated analogs of azaphilones.
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5
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Agarwal R, Gupta M, Antony A, Sen R, Raychoudhury R. In Vitro Studies Reveal that Pseudomonas, from Odontotermes obesus Colonies, can Function as a Defensive Mutualist as it Prevents the Weedy Fungus While Keeping the Crop Fungus Unaffected. MICROBIAL ECOLOGY 2022; 84:391-403. [PMID: 34495359 DOI: 10.1007/s00248-021-01798-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Insects that farm monocultures of fungi are canonical examples of nutritional symbiosis as well as independent evolution of agriculture in non-human animals. But just like in human agriculture, these fungal crops face constant threat of invasion by weeds which, if unchecked, take over the crop fungus. In fungus-growing termites, the crop fungus (Termitomyces) faces such challenges from the weedy fungus Pseudoxylaria. The mechanism by which Pseudoxylaria is suppressed is not known. However, evidence suggests that some bacterial secondary symbionts can serve as defensive mutualists by preventing the growth of Pseudoxylaria. However, such secondary symbionts must possess the dual, yet contrasting, capabilities of suppressing the weedy fungus while keeping the growth of the crop fungus unaffected. This study describes the isolation, identification, and culture-dependent estimation of the roles of several such putative defensive mutualists from the colonies of the wide-spread fungus-growing termite from India, Odontotermes obesus. From the 38 bacterial cultures tested, a strain of Pseudomonas showed significantly greater suppression of the weedy fungus than the crop fungus. Moreover, a 16S rRNA pan-microbiome survey, using the Nanopore platform, revealed Pseudomonas to be a part of the core microbiota of O. obesus. A meta-analysis of microbiota composition across different species of Odontotermes also confirms the widespread prevalence of Pseudomonas within this termite. These lines of evidence indicate that Pseudomonas could be playing the role of defensive mutualist within Odontotermes.
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Affiliation(s)
- Renuka Agarwal
- Department of Biological Sciences, Indian Institute of Science and Education Research Mohali (IISER Mohali), Knowledge City, Sector 81, Manauli, SAS Nagar, Punjab, PO 140306, India
| | - Manisha Gupta
- Department of Biological Sciences, Indian Institute of Science and Education Research Mohali (IISER Mohali), Knowledge City, Sector 81, Manauli, SAS Nagar, Punjab, PO 140306, India
| | - Abin Antony
- Department of Biological Sciences, Indian Institute of Science and Education Research Mohali (IISER Mohali), Knowledge City, Sector 81, Manauli, SAS Nagar, Punjab, PO 140306, India
| | - Ruchira Sen
- Sri Guru Gobind Singh College, Sector 26, Chandigarh, 160019, India
| | - Rhitoban Raychoudhury
- Department of Biological Sciences, Indian Institute of Science and Education Research Mohali (IISER Mohali), Knowledge City, Sector 81, Manauli, SAS Nagar, Punjab, PO 140306, India.
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6
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Ha MW, Kim J, Paek SM. Recent Achievements in Total Synthesis for Integral Structural Revisions of Marine Natural Products. Mar Drugs 2022; 20:md20030171. [PMID: 35323470 PMCID: PMC8951824 DOI: 10.3390/md20030171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
A great effort to discover new therapeutic ingredients is often initiated through the discovery of the existence of novel marine natural products. Since substances produced by the marine environment might be structurally more complex and unique than terrestrial natural products, there have been cases of misassignments of their structures despite the availability of modern spectroscopic and computational chemistry techniques. When it comes to refutation to erroneously or tentatively proposed structures empirical preparations through organic chemical synthesis has the greatest contribution along with close and sophiscated inspection of spectroscopic data. Herein, we analyzed the total synthetic studies that have decisively achieved in revelation of errors, ambiguities, or incompleteness of the isolated structures of marine natural products covering the period from 2018 to 2021.
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Affiliation(s)
- Min Woo Ha
- Jeju Research Institute of Pharmaceutical Sciences, College of Pharmacy, Jeju National University, 102 Jejudaehak-ro, Jeju 63243, Jeju-do, Korea;
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, 102 Jejudaehak-ro, Jeju 63243, Jeju-do, Korea
| | - Jonghoon Kim
- Department of Chemistry, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Korea;
| | - Seung-Mann Paek
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Gyeongnam-do, Korea
- Correspondence: ; Tel.: +82-55-772-2424
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7
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Antiparasitic Ovalicin Derivatives from Pseudallescheria boydii, a Mutualistic Fungus of French Guiana Termites. Molecules 2022; 27:molecules27041182. [PMID: 35208983 PMCID: PMC8877094 DOI: 10.3390/molecules27041182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/04/2022] [Accepted: 02/06/2022] [Indexed: 11/21/2022] Open
Abstract
Social insects are in mutualism with microorganisms, contributing to their resistance against infectious diseases. The fungus Pseudallescheria boydii SNB-CN85 isolated from termites produces ovalicin derivatives resulting from the esterification of the less hindered site of the ovalicin epoxide by long-chain fatty acids. Their structures were elucidated using spectroscopic analysis and semisynthesis from ovalicin. For ovalicin, these compounds displayed antiprotozoal activities against Plasmodium falciparum and Trypanosoma brucei, with IC50 values of 19.8 and 1.1 µM, respectively, for the most active compound, i.e., ovalicin linoleate. In parallel, metabolomic profiling of a collection of P. boydii strains associated with termites made it possible to highlight this class of compounds together with tyroscherin derivatives in all strains. Finally, the complete genome of P. boydii strains was obtained by sequencing, and the cluster of potential ovalicin and ovalicin biosynthesis genes was annotated. Through these metabolomic and genomic analyses, a new ovalicin derivative named boyden C, in which the 6-membered ring of ovalicin was opened by oxidative cleavage, was isolated and structurally characterized.
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8
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Han F, Liu G, Zhang X, Ding Y, Wang L, Wu Y, Chen Y, Zhang Q. Total Synthesis and Structure Revision of Boholamide A. Org Lett 2021; 23:4976-4980. [PMID: 34110162 DOI: 10.1021/acs.orglett.1c01382] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The 15-membered cyclic depsipeptide boholamide A and an epimer were prepared by total synthesis for the first time, thus leading to a revision of C6 stereochemistry in the originally proposed structure of natural boholamide A. This convergent route features achievement of a macro-lactamization step in a gram scale. The revised boholamide A was sythesized with 16 linear steps in 5.46% overall yield. This work facilitates the investigations of boholamide A as a potential hypoxia-selective anticancer agent.
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Affiliation(s)
- Fangzhi Han
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Guangju Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Xuhai Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Yahui Ding
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China.,College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Liang Wang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China.,College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Yijing Wu
- Accendatech Company, Ltd., Tianjin, 300384, People's Republic of China
| | - Yue Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China.,College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China
| | - Quan Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
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9
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An Overview of Antimicrobial Compounds from African Edible Insects and Their Associated Microbiota. Antibiotics (Basel) 2021; 10:antibiotics10060621. [PMID: 34067471 PMCID: PMC8224635 DOI: 10.3390/antibiotics10060621] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 01/26/2023] Open
Abstract
The need for easily biodegradable and less toxic chemicals in drug development and pest control continues to fuel the exploration and discovery of new natural molecules. Like certain plants, some insects can also respond rapidly to microbial infections by producing a plethora of immune-induced molecules that include antibacterial and antifungal peptides/polypeptides (AMPs), among other structurally diverse small molecules. The recent recognition that new natural product-derived scaffolds are urgently needed to tackle life-threatening pathogenic infections has been prompted by the health threats posed by multidrug resistance. Although many researchers have concentrated on the discovery of AMPs, surprisingly, edible insect-produced AMPs/small molecules have received little attention. This review will discuss the recent advances in the identification and bioactivity analysis of insect AMPs, with a focus on small molecules associated with the microbiota of selected African edible insects. These molecules could be used as templates for developing next-generation drugs to combat multidrug-resistant pathogens.
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10
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Li J, Sang M, Jiang Y, Wei J, Shen Y, Huang Q, Li Y, Ni J. Polyene-Producing Streptomyces spp. From the Fungus-Growing Termite Macrotermes barneyi Exhibit High Inhibitory Activity Against the Antagonistic Fungus Xylaria. Front Microbiol 2021; 12:649962. [PMID: 33868208 PMCID: PMC8047067 DOI: 10.3389/fmicb.2021.649962] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/08/2021] [Indexed: 11/19/2022] Open
Abstract
Fungus-growing termites are engaged in a tripartite mutualism with intestinal microbes and a monocultivar (Termitomyces sp.) in the fungus garden. The termites are often plagued by entomopathogen (Metarhizium anisopliae) and fungus garden is always threatened by competitors (Xylaria spp.). Here, we aim to understand the defensive role of intestinal microbes, the actinomycetes which were isolated from the gut of Macrotermes barneyi. We obtained 44 antifungal isolates, which showed moderate to strong inhibition to Xylaria sp. HPLC analysis indicated that different types of polyenes (tetraene, pentene, and heptaene) existed in the metabolites of 10 strong antifungal Streptomyces strains. Two pentene macrolides (pentamycin and 1′14-dihydroxyisochainin) were firstly purified from Streptomyces strain HF10, both exhibiting higher activity against Xylaria sp. and M. anisopliae than cultivar Termitomyces. Subsequently, tetraene and heptaene related gene disruption assay showed that the mutant strains lost the ability to produce corresponding polyenes, and they also had significantly decreased activities against Xylaria sp. and M. anisopliae compared to that of wild type strains. These results indicate that polyene-producing Streptomyces from the guts of M. barneyi have strong inhibition to competitor fungus and polyenes contribute to inhibitory effects on Xylaria sp.
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Affiliation(s)
- Jingjing Li
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Moli Sang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Yutong Jiang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Jianhua Wei
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Yulong Shen
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Qihong Huang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Yaoyao Li
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China.,School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Jinfeng Ni
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
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11
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Kett S, Pathak A, Turillazzi S, Cavalieri D, Marvasi M. Antifungals, arthropods and antifungal resistance prevention: lessons from ecological interactions. Proc Biol Sci 2021; 288:20202716. [PMID: 33529557 DOI: 10.1098/rspb.2020.2716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Arthropods can produce a wide range of antifungal compounds, including specialist proteins, cuticular products, venoms and haemolymphs. In spite of this, many arthropod taxa, particularly eusocial insects, make use of additional antifungal compounds derived from their mutualistic association with microbes. Because multiple taxa have evolved such mutualisms, it must be assumed that, under certain ecological circumstances, natural selection has favoured them over those relying upon endogenous antifungal compound production. Further, such associations have been shown to persist versus specific pathogenic fungal antagonists for more than 50 million years, suggesting that compounds employed have retained efficacy in spite of the pathogens' capacity to develop resistance. We provide a brief overview of antifungal compounds in the arthropods' armoury, proposing a conceptual model to suggest why their use remains so successful. Fundamental concepts embedded within such a model may suggest strategies by which to reduce the rise of antifungal resistance within the clinical milieu.
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Affiliation(s)
- Steve Kett
- Department of Natural Sciences, Middlesex University London, London, UK
| | - Ayush Pathak
- Institute of Integrative Biology, Department of Environmental Systems Science, ETH Zürich, Zurich, Switzerland
| | - Stefano Turillazzi
- Department of Biology, University of Florence, Sesto Fiorentino, Florence, Italy.,Insect Pharma Entomotherapy S.r.l, Sesto Fiorentino, Florence, Italy
| | - Duccio Cavalieri
- Department of Biology, University of Florence, Sesto Fiorentino, Florence, Italy
| | - Massimiliano Marvasi
- Department of Biology, University of Florence, Sesto Fiorentino, Florence, Italy
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12
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Menegatti C, Fukuda TTH, Pupo MT. Chemical Ecology in Insect-microbe Interactions in the Neotropics. PLANTA MEDICA 2021; 87:38-48. [PMID: 32854122 DOI: 10.1055/a-1229-9435] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Small molecules frequently mediate symbiotic interactions between microorganisms and their hosts. Brazil harbors the highest diversity of insects in the world; however, just recently, efforts have been directed to deciphering the chemical signals involved in the symbioses of microorganisms and social insects. The current scenario of natural products research guided by chemical ecology is discussed in this review. Two groups of social insects have been prioritized in the studies, fungus-farming ants and stingless bees, leading to the identification of natural products involved in defensive and nutritional symbioses. Some of the compounds also present potential pharmaceutical applications as antimicrobials, and this is likely related to their ecological roles. Microbial symbioses in termites and wasps are suggested promising sources of biologically active small molecules. Aspects related to public policies for insect biodiversity preservation are also highlighted.
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Affiliation(s)
- Carla Menegatti
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Taise T H Fukuda
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Mônica T Pupo
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
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13
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Oberpaul M, Zumkeller CM, Culver T, Spohn M, Mihajlovic S, Leis B, Glaeser SP, Plarre R, McMahon DP, Hammann P, Schäberle TF, Glaeser J, Vilcinskas A. High-Throughput Cultivation for the Selective Isolation of Acidobacteria From Termite Nests. Front Microbiol 2020; 11:597628. [PMID: 33240253 PMCID: PMC7677567 DOI: 10.3389/fmicb.2020.597628] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/19/2020] [Indexed: 12/27/2022] Open
Abstract
Microbial communities in the immediate environment of socialized invertebrates can help to suppress pathogens, in part by synthesizing bioactive natural products. Here we characterized the core microbiomes of three termite species (genus Coptotermes) and their nest material to gain more insight into the diversity of termite-associated bacteria. Sampling a healthy termite colony over time implicated a consolidated and highly stable microbiome, pointing toward the fact that beneficial bacterial phyla play a major role in termite fitness. In contrast, there was a significant shift in the composition of the core microbiome in one nest during a fungal infection, affecting the abundance of well-characterized Streptomyces species (phylum Actinobacteria) as well as less-studied bacterial phyla such as Acidobacteria. High-throughput cultivation in microplates was implemented to isolate and identify these less-studied bacterial phylogenetic group. Amplicon sequencing confirmed that our method maintained the bacterial diversity of the environmental samples, enabling the isolation of novel Acidobacteriaceae and expanding the list of cultivated species to include two strains that may define new species within the genera Terracidiphilus and Acidobacterium.
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Affiliation(s)
- Markus Oberpaul
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Celine M. Zumkeller
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Tanja Culver
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Marius Spohn
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Sanja Mihajlovic
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Benedikt Leis
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Stefanie P. Glaeser
- Institute of Applied Microbiology, Justus Liebig University Giessen, Giessen, Germany
| | - Rudy Plarre
- Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
| | - Dino P. McMahon
- Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
- Institute of Biology, Free University of Berlin, Berlin, Germany
| | - Peter Hammann
- Sanofi-Aventis Deutschland GmbH, R&D Integrated Drug Discovery, Hoechst Industrial Park, Frankfurt am Main, Germany
| | - Till F. Schäberle
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
- Institute for Insect Biotechnology, Justus Liebig University Giessen, Giessen, Germany
| | - Jens Glaeser
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
| | - Andreas Vilcinskas
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Giessen, Germany
- Institute for Insect Biotechnology, Justus Liebig University Giessen, Giessen, Germany
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14
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Chanana S, Thomas CS, Zhang F, Rajski SR, Bugni TS. hcapca: Automated Hierarchical Clustering and Principal Component Analysis of Large Metabolomic Datasets in R. Metabolites 2020; 10:E297. [PMID: 32708222 PMCID: PMC7407629 DOI: 10.3390/metabo10070297] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/13/2020] [Accepted: 07/18/2020] [Indexed: 11/16/2022] Open
Abstract
Microbial natural product discovery programs face two main challenges today: rapidly prioritizing strains for discovering new molecules and avoiding the rediscovery of already known molecules. Typically, these problems have been tackled using biological assays to identify promising strains and techniques that model variance in a dataset such as PCA to highlight novel chemistry. While these tools have shown successful outcomes in the past, datasets are becoming much larger and require a new approach. Since PCA models are dependent on the members of the group being modeled, large datasets with many members make it difficult to accurately model the variance in the data. Our tool, hcapca, first groups strains based on the similarity of their chemical composition, and then applies PCA to the smaller sub-groups yielding more robust PCA models. This allows for scalable chemical comparisons among hundreds of strains with thousands of molecular features. As a proof of concept, we applied our open-source tool to a dataset with 1046 LCMS profiles of marine invertebrate associated bacteria and discovered three new analogs of an established anticancer agent from one promising strain.
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Affiliation(s)
| | | | | | | | - Tim S. Bugni
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA; (S.C.); (C.S.T.); (F.Z.); (S.R.R.)
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15
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Ganley JG, Pandey A, Sylvester K, Lu KY, Toro-Moreno M, Rütschlin S, Bradford JM, Champion CJ, Böttcher T, Xu J, Derbyshire ER. A Systematic Analysis of Mosquito-Microbiome Biosynthetic Gene Clusters Reveals Antimalarial Siderophores that Reduce Mosquito Reproduction Capacity. Cell Chem Biol 2020; 27:817-826.e5. [PMID: 32619453 DOI: 10.1016/j.chembiol.2020.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/18/2020] [Accepted: 06/12/2020] [Indexed: 12/20/2022]
Abstract
Advances in infectious disease control strategies through genetic manipulation of insect microbiomes have heightened interest in microbially produced small molecules within mosquitoes. Herein, 33 mosquito-associated bacterial genomes were mined and over 700 putative biosynthetic gene clusters (BGCs) were identified, 135 of which belong to known classes of BGCs. After an in-depth analysis of the 135 BGCs, iron-binding siderophores were chosen for further investigation due to their high abundance and well-characterized bioactivities. Through various metabolomic strategies, eight siderophore scaffolds were identified in six strains of mosquito-associated bacteria. Among these, serratiochelin A and pyochelin were found to reduce female Anopheles gambiae overall fecundity likely by lowering their blood-feeding rate. Serratiochelin A and pyochelin were further found to inhibit the Plasmodium parasite asexual blood and liver stages in vitro. Our work supplies a bioinformatic resource for future mosquito-microbiome studies and highlights an understudied source of bioactive small molecules.
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Affiliation(s)
- Jack G Ganley
- Department of Chemistry, Duke University, Durham, NC, USA
| | - Ashmita Pandey
- Department of Biology, Molecular Biology Program, New Mexico State University, Las Cruces, NM, USA
| | - Kayla Sylvester
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA
| | - Kuan-Yi Lu
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA
| | | | - Sina Rütschlin
- Department of Chemistry, Konstanz Research School Chemical Biology, Zukunftskolleg, University of Konstanz, Konstanz, Germany
| | | | - Cody J Champion
- Department of Biology, Molecular Biology Program, New Mexico State University, Las Cruces, NM, USA
| | - Thomas Böttcher
- Department of Chemistry, Konstanz Research School Chemical Biology, Zukunftskolleg, University of Konstanz, Konstanz, Germany
| | - Jiannong Xu
- Department of Biology, Molecular Biology Program, New Mexico State University, Las Cruces, NM, USA
| | - Emily R Derbyshire
- Department of Chemistry, Duke University, Durham, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA.
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16
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Zhang XM, Peng AH, Xie WD, Wang M, Zheng D, Feng MK. Hexokinase II Inhibitory Effect of Secondary Metabolites Derived from a Streptomyces sp. Associated with Mud Dauber Wasp. Chem Biodivers 2020; 17:e2000140. [PMID: 32515903 DOI: 10.1002/cbdv.202000140] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/05/2020] [Indexed: 12/19/2022]
Abstract
Insect-microbial symbioses have vast biochemical diversity, which is beneficial to produce bioactive secondary metabolites. In this study, chemical examination of a Streptomyces sp. associated with a mud dauber wasp led to the isolation of fourteen compounds. Their structures were determined by spectroscopic methods and comparison with literature data. Among the isolates, compounds 1,2,3-benzotriazin-4(1H)-one and 4-(2-aminoethyl)phenyl acetate were first reported from this species. Bioactivities of the isolated compounds were assayed for the first time against hexokinase II. 4-(2-Aminoethyl)phenyl acetate, germicidin B, phenylacetic acid, isogermicidin A and germicidin C displayed significant inhibitory activity against hexokinase II, with the IC50 values of 5.11, 7.11, 7.15, 8.45 and 8.78 μM, respectively.
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Affiliation(s)
- Xiu-Mei Zhang
- Department of Pharmacy, Shandong Drug and Food Vocational College, Weihai, 264210, P. R. China
| | - Ai-Hong Peng
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai, 264209, P. R. China
| | - Wei-Dong Xie
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai, 264209, P. R. China
| | - Mei Wang
- Department of Pharmacy, Shandong Drug and Food Vocational College, Weihai, 264210, P. R. China
| | - Dan Zheng
- Department of Pharmacy, Shandong Drug and Food Vocational College, Weihai, 264210, P. R. China
| | - Ming-Kuan Feng
- Department of Pharmacy, Shandong Drug and Food Vocational College, Weihai, 264210, P. R. China
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17
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Torres JP, Lin Z, Fenton DS, Leavitt LU, Niu C, Lam PY, Robes JM, Peterson RT, Concepcion GP, Haygood MG, Olivera BM, Schmidt EW. Boholamide A, an APD-Class, Hypoxia-Selective Cyclodepsipeptide. JOURNAL OF NATURAL PRODUCTS 2020; 83:1249-1257. [PMID: 32186874 PMCID: PMC10172148 DOI: 10.1021/acs.jnatprod.0c00038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Calcium homeostasis is implicated in some cancers, leading to the possibility that selective control of calcium might lead to new cancer drugs. On the basis of this idea, we designed an assay using a glioblastoma cell line and screened a collection of 1000 unique bacterial extracts. Isolation of the active compound from a hit extract led to the identification of boholamide A (1), a 4-amido-2,4-pentadieneoate (APD)-class peptide. Boholamide A (1) applied in the nanomolar range induces an immediate influx of Ca2+ in glioblastoma and neuronal cells. APD-class natural products are hypoxia-selective cytotoxins that primarily target mitochondria. Like other APD-containing compounds, 1 is hypoxia selective. Since APD natural products have received significant interest as potential chemotherapeutic agents, 1 provides a novel APD scaffold for the development of new anticancer compounds.
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Affiliation(s)
- Joshua P Torres
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - David S Fenton
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Lee U Leavitt
- School of Biological Sciences, University of Utah, Salt Lake City, Utah 84112, United States
| | - Changshan Niu
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Pui-Ying Lam
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jose Miguel Robes
- The Marine Science Institute, University of the Philippines, Diliman, Quezon City 1101, Philippines
| | - Randall T Peterson
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112, United States
| | - Gisela P Concepcion
- The Marine Science Institute, University of the Philippines, Diliman, Quezon City 1101, Philippines
| | - Margo G Haygood
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Baldomero M Olivera
- School of Biological Sciences, University of Utah, Salt Lake City, Utah 84112, United States
| | - Eric W Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
- School of Biological Sciences, University of Utah, Salt Lake City, Utah 84112, United States
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18
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Xu X, Shao M, Yin C, Mao Z, Shi J, Yu X, Wang Y, Sun F, Zhang Y. Diversity, Bacterial Symbionts, and Antimicrobial Potential of Termite-Associated Fungi. Front Microbiol 2020; 11:300. [PMID: 32231643 PMCID: PMC7082625 DOI: 10.3389/fmicb.2020.00300] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/10/2020] [Indexed: 11/13/2022] Open
Abstract
The phylogenetic diversity of fungi isolated from the Odontotermes formosanus was investigated by dilution-plate method, combined with morphological characteristics and 5.8S rDNA sequencing. Thirty-nine fungi were isolated and purified from O. formosanus, which were belonging to two phyla and four classes (Sordariomycetes, Dothideomycetes, Eurotiomycetes, Agaricomycetes). Furthermore, nine bacterial 16S rRNA sequences were obtained from total fungal genomic DNA. All bacterial symbionts were segmented into four genera: Bacillus, Methylobacterium, Paenibacillus, and Trabulsiella. The antimicrobial activities of all endophytic fungi extracts were tested by using the filter paper method against Escherichia coli (ATCC 8739), Bacillus subtilis (ATCC 6633), Staphylococcus aureus (ATCC 6538), and Canidia albicans (ATCC 10231). The results exhibited that 25 extracts (64%) exhibited antibacterial activity against at least one of the tested bacterial strains. Furthermore, the secondary metabolites 1 [5-hydroxyramulosin (1a):biatriosporin M (1b) = 2:1] from the Pleosporales sp. BYCDW4 exhibited potent antimicrobial activities against E. coli, C. albicans, B. subtilis, and S. aureus with the inhibition zone diameter (IZD) of 13.67, 14.33, 12.17, and 11.33 mm, respectively, which were comparable with those of the positive control. 1-(2,5-Dihydroxyphenyl)-3-hydroxybutan-1-one (2) from the Microdiplodia sp. BYCDW8 showed medium inhibitory activities against B. subtilis and S. aureus, with the IZD range of 8.32–9.13 mm. In conclusion, the study showed the diversity of insect symbionts could be expected to develop the resource of new species and antibiotics.
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Affiliation(s)
- Xiao Xu
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Mingwei Shao
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Caiping Yin
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Zhenchuan Mao
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jingjing Shi
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Xinyuan Yu
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Ying Wang
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Feifei Sun
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Yinglao Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
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19
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Chevrette MG, Carlson CM, Ortega HE, Thomas C, Ananiev GE, Barns KJ, Book AJ, Cagnazzo J, Carlos C, Flanigan W, Grubbs KJ, Horn HA, Hoffmann FM, Klassen JL, Knack JJ, Lewin GR, McDonald BR, Muller L, Melo WGP, Pinto-Tomás AA, Schmitz A, Wendt-Pienkowski E, Wildman S, Zhao M, Zhang F, Bugni TS, Andes DR, Pupo MT, Currie CR. The antimicrobial potential of Streptomyces from insect microbiomes. Nat Commun 2019; 10:516. [PMID: 30705269 PMCID: PMC6355912 DOI: 10.1038/s41467-019-08438-0] [Citation(s) in RCA: 184] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/11/2019] [Indexed: 12/29/2022] Open
Abstract
Antimicrobial resistance is a global health crisis and few novel antimicrobials have been discovered in recent decades. Natural products, particularly from Streptomyces, are the source of most antimicrobials, yet discovery campaigns focusing on Streptomyces from the soil largely rediscover known compounds. Investigation of understudied and symbiotic sources has seen some success, yet no studies have systematically explored microbiomes for antimicrobials. Here we assess the distinct evolutionary lineages of Streptomyces from insect microbiomes as a source of new antimicrobials through large-scale isolations, bioactivity assays, genomics, metabolomics, and in vivo infection models. Insect-associated Streptomyces inhibit antimicrobial-resistant pathogens more than soil Streptomyces. Genomics and metabolomics reveal their diverse biosynthetic capabilities. Further, we describe cyphomycin, a new molecule active against multidrug resistant fungal pathogens. The evolutionary trajectories of Streptomyces from the insect microbiome influence their biosynthetic potential and ability to inhibit resistant pathogens, supporting the promise of this source in augmenting future antimicrobial discovery.
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Affiliation(s)
- Marc G Chevrette
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, 53706, WI, USA.,Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Caitlin M Carlson
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Humberto E Ortega
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-903, SP, Brazil
| | - Chris Thomas
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Gene E Ananiev
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Kenneth J Barns
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Adam J Book
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Julian Cagnazzo
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Camila Carlos
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Will Flanigan
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Kirk J Grubbs
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Heidi A Horn
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - F Michael Hoffmann
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Jonathan L Klassen
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, 06269, CT, USA
| | - Jennifer J Knack
- Department of Biology, Large Lakes Observatory, University of Minnesota-Duluth, Duluth, 55812, MN, USA
| | - Gina R Lewin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, 30332, GA, USA
| | - Bradon R McDonald
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Laura Muller
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | - Weilan G P Melo
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-903, SP, Brazil
| | - Adrián A Pinto-Tomás
- Center for Research in Microscopic Structures and Department of Biochemistry, School of Medicine, University of Costa Rica, San José, 10102, Costa Rica
| | - Amber Schmitz
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA
| | | | - Scott Wildman
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Miao Zhao
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, 53705, WI, USA
| | - Fan Zhang
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - Tim S Bugni
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, 53705, WI, USA
| | - David R Andes
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, 53705, WI, USA
| | - Monica T Pupo
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-903, SP, Brazil
| | - Cameron R Currie
- Department of Bacteriology, University of Wisconsin-Madison, Madison, 53706, WI, USA.
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20
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Antifungal activity of 3-acetylbenzamide produced by actinomycete WA23-4-4 from the intestinal tract of Periplaneta americana. J Microbiol 2018; 56:516-523. [PMID: 29956124 DOI: 10.1007/s12275-018-7510-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 03/15/2018] [Accepted: 05/01/2018] [Indexed: 10/28/2022]
Abstract
Actinomycetes are well-known for producing numerous bioactive secondary metabolites. In this study, primary screening by antifungal activity assay found one actinomycete strain WA23-4-4 isolated from the intestinal tract of Periplaneta americana that exhibited broad spectrum antifungal activity. 16S rDNA gene analysis of strain WA23-4-4 revealed close similarity to Streptomyces nogalater (AB045886) with 86.6% sequence similarity. Strain WA23-4-4 was considered as a novel Streptomyces and the 16s rDNA sequence has been submitted to GenBank (accession no. KX291006). The maximum antifungal activity of WA23-4-4 was achieved when culture conditions were optimized to pH 8.0, with 12% inoculum concentration and 210 ml ISP2 medium, which remained stable between the 5th and the 9th day. 3-Acetyl benzoyl amide was isolated by ethyl acetate extraction of WA23-4-4 fermentation broth, and its molecular formula was determined as C9H9NO2 based on MS, IR, 1H, and 13C NMR analyses. The compound showed significant antifungal activity against Candida albicans ATCC 10231 (MIC: 31.25 μg/ml) and Aspergillus niger ATCC 16404 (MIC: 31.25 μg/ml). However, the compound had higher MIC values against Trichophyton rubrum ATCC 60836 (MIC: 500 μg/ml) and Aspergillus fumigatus ATCC 96918 (MIC: 1,000 μg/ml). SEM analysis showed damage to the cell membrane of Candida albicans ATCC 10231 and to the mycelium of Aspergillus niger ATCC 16404 after being treatment with 3-acetyl benzoyl amide. In conclusion, this is the first time that 3-acetyl benzoyl amide has been identified from an actinomycete and this compound exhibited antifungal activity against Candida albicans ATCC 10231 and Aspergillus niger ATCC 16404.
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21
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Ganley JG, Carr G, Ioerger TR, Sacchettini JC, Clardy J, Derbyshire ER. Discovery of Antimicrobial Lipodepsipeptides Produced by aSerratiasp. within Mosquito Microbiomes. Chembiochem 2018; 19:1590-1594. [DOI: 10.1002/cbic.201800124] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Jack G. Ganley
- Department of Chemistry; Duke University; 124 Science Drive Durham NC 27708-0346 USA
| | - Gavin Carr
- Department of Biological Chemistry and Molecular Pharmacology; Harvard Medical School; 240 Longwood Avenue Boston MA 02115 USA
| | - Thomas R. Ioerger
- Department of Computer Science; Texas A&M University; College Station TX 77843 USA
| | - James C. Sacchettini
- Department of Biochemistry and Biophysics; Texas A&M University; College Station TX 77843 USA
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology; Harvard Medical School; 240 Longwood Avenue Boston MA 02115 USA
| | - Emily R. Derbyshire
- Department of Chemistry; Duke University; 124 Science Drive Durham NC 27708-0346 USA
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22
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Chen J, Li J, Wu L, Geng Y, Yu J, Chong C, Wang M, Gao Y, Bai C, Ding Y, Chen Y, Zhang Q. Syntheses and anti-pancreatic cancer activities of rakicidin A analogues. Eur J Med Chem 2018; 151:601-627. [PMID: 29656202 DOI: 10.1016/j.ejmech.2018.03.078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 03/22/2018] [Accepted: 03/27/2018] [Indexed: 12/28/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignant tumor and resistant to most therapies. Pancreatic cancer stem cells (PCSCs) had critical role in regulating PDAC progression, metastasis, and drug resistance. Therefore, targeting PCSCs is considered to be a promising strategy for treatment of PDAC. However, there is no effective drug that can selectively ablate PCSCs. A series of twenty rakicidin A analogues were synthesized via a combinatorial strategy and evaluated for their anti-PDAC activities, and the structure-activity relationship was also discussed. Compound 32g was prepared in 14 linear steps with 5.05% overall yield, which is much more efficient than our previously reported total synthesis of rakicidin A (19 linear steps with 0.19% yield). In a highly metastatic pancreatic cancer cell line ASPC-1, compound 32g showed about 4 times higher potency (IC50 = 0.022 μM) than rakicidin A (IC50 = 0.082 μM) at hypoxia condition, and 12 folds of hypoxia selectivity (IC50 = 0.27 μM at nomoxia condition). In contrast, the activity of adriamycin in the same hypoxic condition decreased. The percentage of PCSCs (with CD24+CD44+ESA+ biomarker), activity of ALDH, and the number of tumorspheres in PANC-1 cells were greatly reduced after treatment of 32g. More importantly, the tumor-initiating frequency was reduced by 19 folds after the treatment of 32g, which is better than that of rakicidin A (reduction of 4.7 folds).
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Affiliation(s)
- Jian Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China
| | - Jingpei Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China; High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Lingling Wu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China
| | - Yan Geng
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China; High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Jianming Yu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China; High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Chuanke Chong
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China; High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Mengmeng Wang
- Accendatech Company, Ltd., Tianjin, 300384, People's Republic of China
| | - Yuan Gao
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China; High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Cuigai Bai
- High-throughput Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin, 300457, People's Republic of China
| | - Yahui Ding
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China.
| | - Yue Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China.
| | - Quan Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, People's Republic of China.
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23
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Ponnapalli MG, Gundoju NR, Theerthala H, Bokam R, Yalavarthi NR. On the Structure of ( R)-2-Methylheptyl Isonicotinate: Evidence for the Structural Solution from Total Synthesis. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The controversial molecular identification of ( R)-2-methylheptyl isonicotinate (1) has been settled. Despite its significance as a potent anti-microbial agent against several clinically relevant pathogens, the structure of natural product is uncertain so far due to controversial reports. Its structure has been resolved as bis (2-ethylhexyl) phthalate (2) by total syntheses of chain isomers. In addition, we have also revised bis (2-methylheptyl) phthalate (3) as (2) in some reports.
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Affiliation(s)
- Mangala Gowri Ponnapalli
- Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, Telangana State, India, 500 007
| | - Narayana Rao Gundoju
- Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, Telangana State, India, 500 007
| | - Harikiran Theerthala
- Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, Telangana State, India, 500 007
| | - Ramesh Bokam
- Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, Telangana State, India, 500 007
| | - Nageswara Rao Yalavarthi
- Natural Products Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, Telangana State, India, 500 007
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24
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Lee D, Kang KS, Lee HJ, Kim KH. Chemical Characterization of a Renoprotective Metabolite from Termite-Associated Streptomyces sp. RB1 against Cisplatin-Induced Cytotoxicity. Int J Mol Sci 2018; 19:ijms19010174. [PMID: 29316657 PMCID: PMC5796123 DOI: 10.3390/ijms19010174] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 01/02/2018] [Accepted: 01/03/2018] [Indexed: 01/25/2023] Open
Abstract
Platinum-based anticancer drug therapies can cause renal damage and apoptotic kidney cell damage. The development of reno- and kidney-protective molecules is therefore urgently required. To address this challenge, we explored secondary metabolites of termite-associated Streptomyces sp. RB1 isolated from the cuticle of the South African termite, Macrotermes natalensis for their renoprotective ability using bioassay-guided fractionation and LLC-PK1 cells. Chemical investigation of the MeOH extract of Streptomyces sp. RB1 resulted in the isolation and identification of a renoprotective metabolite, 1-O-(2-aminobenzoyl)-α-l-rhamnopyranoside (ABR) (1) from the active fraction, which ameliorated cisplatin-induced cytotoxicity to 80% of the control value at 25 μM. Upregulated phosphorylation of c-Jun N-terminal kinases (JNK) and p38 following cisplatin treatment was markedly decreased after pre-treatment of cells with ABR. In addition, levels of cleaved caspase-3 and the percentage of apoptotic cells were also significantly reduced after pre-treatment with ABR. These findings provide experimental evidence that blocking the MAPK signaling cascade plays a critical role in mediating the renoprotective effect of ABR, which may inspire the development of novel therapeutic substances to prevent anticancer drug-induced nephrotoxicity.
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Affiliation(s)
- Dahae Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Hae-Jeung Lee
- Department of Food and Nutrition, Gachon University, Seongnam 13120, Korea.
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
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25
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Van Arnam EB, Currie CR, Clardy J. Defense contracts: molecular protection in insect-microbe symbioses. Chem Soc Rev 2018; 47:1638-1651. [DOI: 10.1039/c7cs00340d] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Insects frequently host microbes that produce defensive molecules: a successful protective strategy and also an opportunity for antibiotic discovery
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Affiliation(s)
- Ethan B. Van Arnam
- Keck Science Department
- Claremont McKenna
- Pitzer
- and Scripps Colleges
- Claremont
| | | | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology
- Harvard Medical School
- Boston
- USA
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26
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Chemical Interaction among Termite-Associated Microbes. J Chem Ecol 2017; 43:1078-1085. [PMID: 29134406 PMCID: PMC5735195 DOI: 10.1007/s10886-017-0900-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/09/2017] [Accepted: 10/27/2017] [Indexed: 12/27/2022]
Abstract
Bacteria and fungi in shared environments compete with one another for common substrates, and this competition typically involves microbially-produced small molecules. An investigation of one shared environmental niche, the carton material of the Formosan subterranean termite Coptotermes formosanus, identified the participants on one of these molecular exchanges. Molecular characterization of several termite-associated actinobacteria strains identified eleven known antimicrobial metabolites that may aid in protecting the C. formosanus colony from pathogenic fungal infections. One particular actinobacterial-derived small molecule, bafilomycin C1, elicited a strong chemical response from Trichoderma harzianum, a common soil saprophyte. Upon purification and structure elucidation, three major fungal metabolites were identified, t22-azaphilone, cryptenol, and homodimericin A. Both t22-azaphilone and homodimericin A are strongly upregulated, 123- and 38-fold, respectively, when exposed to bafilomycin C1, suggesting each play a role in defending T. harzianum from the toxic effect of bafilomycin C1.
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27
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Liu CX, Liu SH, Zhao JW, Zhang J, Wang XJ, Li JS, Wang JD, Xiang WS. A new spectinabilin derivative with cytotoxic activity from ant-derived Streptomyces sp. 1H-GS5. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2017; 19:924-929. [PMID: 27838921 DOI: 10.1080/10286020.2016.1254200] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 10/25/2016] [Indexed: 06/06/2023]
Abstract
A new spectinabilin derivative (1) was isolated from the fermentation broth of the ant-derived Streptomyces sp. 1H-GS5, and the structure was elucidated by extensive spectroscopic analysis. Compound 1 showed cytotoxicity against human tumor cell lines A549, HCT-116, and HepG2 with IC50 values of 9.7, 12.8, and 9.1 μg/ml, respectively, which was relative higher than that of spectinabilin.
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Affiliation(s)
- Chong-Xi Liu
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
| | - Shuang-He Liu
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
- b Department of New Drug Screening , Zhejiang Hisun Pharmaceutical Co., Ltd , Taizhou 318000 , China
| | - Jun-Wei Zhao
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
| | - Ji Zhang
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
| | - Xiang-Jing Wang
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
| | - Jian-Song Li
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
- b Department of New Drug Screening , Zhejiang Hisun Pharmaceutical Co., Ltd , Taizhou 318000 , China
| | - Ji-Dong Wang
- b Department of New Drug Screening , Zhejiang Hisun Pharmaceutical Co., Ltd , Taizhou 318000 , China
| | - Wen-Sheng Xiang
- a Life Science and Biotechnology Research Center , School of Life Science, Northeast Agricultural University , Harbin 150030 , China
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28
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Chanana S, Thomas CS, Braun DR, Hou Y, Wyche TP, Bugni TS. Natural Product Discovery Using Planes of Principal Component Analysis in R (PoPCAR). Metabolites 2017; 7:metabo7030034. [PMID: 28703778 PMCID: PMC5618319 DOI: 10.3390/metabo7030034] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/20/2017] [Accepted: 07/11/2017] [Indexed: 01/11/2023] Open
Abstract
Rediscovery of known natural products hinders the discovery of new, unique scaffolds. Efforts have mostly focused on streamlining the determination of what compounds are known vs. unknown (dereplication), but an alternative strategy is to focus on what is different. Utilizing statistics and assuming that common actinobacterial metabolites are likely known, focus can be shifted away from dereplication and towards discovery. LC-MS-based principal component analysis (PCA) provides a perfect tool to distinguish unique vs. common metabolites, but the variability inherent within natural products leads to datasets that do not fit ideal standards. To simplify the analysis of PCA models, we developed a script that identifies only those masses or molecules that are unique to each strain within a group, thereby greatly reducing the number of data points to be inspected manually. Since the script is written in R, it facilitates integration with other metabolomics workflows and supports automated mass matching to databases such as Antibase.
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Affiliation(s)
- Shaurya Chanana
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
| | - Chris S Thomas
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
| | - Doug R Braun
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
| | - Yanpeng Hou
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
| | - Thomas P Wyche
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
- Exploratory Science Center, Merck & Co., 320 Bent St., Cambridge, MA 02141, USA.
| | - Tim S Bugni
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA.
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29
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Martinez AFC, de Almeida LG, Moraes LAB, Cônsoli FL. Tapping the biotechnological potential of insect microbial symbionts: new insecticidal porphyrins. BMC Microbiol 2017; 17:143. [PMID: 28655338 PMCID: PMC5488367 DOI: 10.1186/s12866-017-1054-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 06/20/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The demand for sustainable agricultural practices and the limited progress toward newer and safer chemicals for use in pest control maintain the impetus for research and identification of new natural molecules. Natural molecules are preferable to synthetic organic molecules because they are biodegradable, have low toxicity, are often selective and can be applied at low concentrations. Microbes are one source of natural insecticides, and microbial insect symbionts have attracted attention as a source of new bioactive molecules because these microbes are exposed to various selection pressures in their association with insects. Analytical techniques must be used to isolate and characterize new compounds, and sensitive analytical tools such as mass spectrometry and high-resolution chromatography are required to identify the least-abundant molecules. RESULTS We used classical fermentation techniques combined with tandem mass spectrometry to prospect for insecticidal substances produced by the ant symbiont Streptomyces caniferus. Crude extracts from this bacterium showed low biological activity (less than 10% mortality) against the larval stage of the fall armyworm Spodoptera frugiperda. Because of the complexity of the crude extract, we used fractionation-guided bioassays to investigate if the low toxicity was related to the relative abundance of the active molecule, leading to the isolation of porphyrins as active molecules. Porphyrins are a class of photoactive molecules with a broad range of bioactivity, including insecticidal. The active fraction, containing a mixture of porphyrins, induced up to 100% larval mortality (LD50 = 37.7 μg.cm-2). Tandem mass-spectrometry analyses provided structural information for two new porphyrin structures. Data on the availability of porphyrins in 67 other crude extracts of ant ectosymbionts were also obtained with ion-monitoring experiments. CONCLUSIONS Insect-associated bacterial symbionts are a rich source of bioactive compounds. Exploring microbial diversity through mass-spectrometry analyses is a useful approach for isolating and identifying new compounds. Our results showed high insecticidal activity of porphyrin compounds. Applications of different experiments in mass spectrometry allowed the characterization of two new porphyrins.
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Affiliation(s)
- Ana Flávia Canovas Martinez
- Laboratório de Interações em Insetos, Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av Pádua Dias 11, 13418–900, Piracicaba, SP Brazil
| | - Luís Gustavo de Almeida
- Laboratório de Interações em Insetos, Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av Pádua Dias 11, 13418–900, Piracicaba, SP Brazil
| | - Luiz Alberto Beraldo Moraes
- Laboratório de Espectrometria de Massas Aplicada a Produtos Naturais, Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av Bandeirantes 3900, 14040–901, Ribeirão Preto, SP Brazil
| | - Fernando Luís Cônsoli
- Laboratório de Interações em Insetos, Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av Pádua Dias 11, 13418–900, Piracicaba, SP Brazil
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30
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Guo H, Benndorf R, Leichnitz D, Klassen JL, Vollmers J, Görls H, Steinacker M, Weigel C, Dahse HM, Kaster AK, de Beer ZW, Poulsen M, Beemelmanns C. Isolation, Biosynthesis and Chemical Modifications of Rubterolones A-F: Rare Tropolone Alkaloids from Actinomadura sp. 5-2. Chemistry 2017; 23:9338-9345. [PMID: 28463423 DOI: 10.1002/chem.201701005] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Indexed: 12/15/2022]
Abstract
The discovery of six new, highly substituted tropolone alkaloids, rubterolones A-F, from Actinomadura sp. 5-2, isolated from the gut of the fungus-growing termite Macrotermes natalensis is reported. Rubterolones were identified by using fungus-bacteria challenge assays and a HRMS-based dereplication strategy, and characterised by NMR and HRMS analyses and by X-ray crystallography. Feeding experiments and subsequent chemical derivatisation led to a first library of rubterolone derivatives (A-L). Genome sequencing and comparative analyses revealed their putative biosynthetic pathway, which was supported by feeding experiments. This study highlights how gut microbes can present a prolific source of secondary metabolites.
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Affiliation(s)
- Huijuan Guo
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - René Benndorf
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Daniel Leichnitz
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Jonathan L Klassen
- Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, CT, 06269-3125, USA
| | - John Vollmers
- Leibniz Institute DSMZ, German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Braunschweig, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University Jena, Lessingstraße 8, 07743, Jena, Germany
| | - Matthias Steinacker
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Christiane Weigel
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Hans-Martin Dahse
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
| | - Anne-Kristin Kaster
- Leibniz Institute DSMZ, German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124, Braunschweig, Germany
| | - Z Wilhelm de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agriculture Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Michael Poulsen
- Centre for Social Evolution, University of Copenhagen, 2100, Copenhagen East, Denmark
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstraße 11a, 07745, Jena, Germany
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31
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Ye L, Zhao S, Li Y, Jiang S, Zhao Y, Li J, Yan K, Wang X, Xiang W, Liu C. Streptomyces lasiicapitis sp. nov., an actinomycete that produces kanchanamycin, isolated from the head of an ant (Lasius fuliginosus L.). Int J Syst Evol Microbiol 2017; 67:1529-1534. [PMID: 28005517 DOI: 10.1099/ijsem.0.001756] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During a screening for novel and biotechnologically useful actinobacteria in insects, a kanchanamycin-producing actinomycete with antifungal activity, designated strain 3H-HV17(2)T, was isolated from the head of an ant (Lasius fuliginosus L.) and characterized using a polyphasic approach. 16S rRNA gene sequence similarity studies showed that strain 3H-HV17(2)T belongs to the genus Streptomyces with the highest sequence similarities to Streptomyces spectabilis NBRC 13424T (98.90 %, with which it phylogenetically clustered, Streptomyces alboflavus NRRL B-2373T (98.65 %) and Streptomyces flavofungini NBRC 13371T (98.36 %). Phylogenetic analysis based on the gyrB gene also supported the close relationship of these strains. The morphological and chemotaxonomic properties of the strain are also consistent with those members of the genus Streptomyces. A combination of DNA-DNA hybridization experiments and phenotypic tests were carried out between strain 3H-HV17(2)T and its phylogenetically closely related strains, which further clarified their relatedness and demonstrated that strain 3H-HV17(2)T could be distinguished from these strains. Therefore, strain 3H-HV17(2)T is concluded to represent a novel species of the genus Streptomyces, for which the name Streptomyces lasiicapitis sp. nov. is proposed. The type strain is 3H-HV17(2)T (=CGMCC 4.7349T=DSM 103124T).
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Affiliation(s)
- Lan Ye
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Shanshan Zhao
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Yao Li
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Shanwen Jiang
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Yue Zhao
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Jinmeng Li
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Kai Yan
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Xiangjing Wang
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
| | - Wensheng Xiang
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China.,State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Chongxi Liu
- Key Laboratory of Agriculture Biological Functional Gene of Heilongjiang Provincial Education Committee, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, PR China
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van der Meij A, Worsley SF, Hutchings MI, van Wezel GP. Chemical ecology of antibiotic production by actinomycetes. FEMS Microbiol Rev 2017; 41:392-416. [DOI: 10.1093/femsre/fux005] [Citation(s) in RCA: 220] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 02/02/2017] [Indexed: 12/13/2022] Open
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Hill P, Heberlig GW, Boddy CN. Sampling Terrestrial Environments for Bacterial Polyketides. Molecules 2017; 22:E707. [PMID: 28468277 PMCID: PMC6154731 DOI: 10.3390/molecules22050707] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 04/14/2017] [Accepted: 04/18/2017] [Indexed: 12/17/2022] Open
Abstract
Bacterial polyketides are highly biologically active molecules that are frequently used as drugs, particularly as antibiotics and anticancer agents, thus the discovery of new polyketides is of major interest. Since the 1980s discovery of polyketides has slowed dramatically due in large part to the repeated rediscovery of known compounds. While recent scientific and technical advances have improved our ability to discover new polyketides, one key area has been under addressed, namely the distribution of polyketide-producing bacteria in the environment. Identifying environments where producing bacteria are abundant and diverse should improve our ability to discover (bioprospect) new polyketides. This review summarizes for the bioprospector the state-of-the-field in terrestrial microbial ecology. It provides insight into the scientific and technical challenges limiting the application of microbial ecology discoveries for bioprospecting and summarizes key developments in the field that will enable more effective bioprospecting. The major recent efforts by researchers to sample new environments for polyketide discovery is also reviewed and key emerging environments such as insect associated bacteria, desert soils, disease suppressive soils, and caves are highlighted. Finally strategies for taking and characterizing terrestrial samples to help maximize discovery efforts are proposed and the inclusion of non-actinomycetal bacteria in any terrestrial discovery strategy is recommended.
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Affiliation(s)
- Patrick Hill
- Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
| | - Graham W Heberlig
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
| | - Christopher N Boddy
- Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
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34
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Elshahawi SI, Cao H, Shaaban KA, Ponomareva LV, Subramanian T, Farman ML, Spielmann HP, Phillips GN, Thorson JS, Singh S. Structure and specificity of a permissive bacterial C-prenyltransferase. Nat Chem Biol 2017; 13:366-368. [PMID: 28166207 PMCID: PMC5362326 DOI: 10.1038/nchembio.2285] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/01/2016] [Indexed: 11/21/2022]
Abstract
This study highlights the biochemical and structural characterization of the L-tryptophan C6 C-prenyltransferase (C-PT) PriB from Streptomyces sp. RM-5-8. PriB was found to be uniquely permissive to a diverse array of prenyl donors and acceptors including daptomycin. Two additional PTs also produced novel prenylated daptomycins with improved antibacterial activities over the parent drug.
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Affiliation(s)
- Sherif I. Elshahawi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY 40536
| | - Hongnan Cao
- Department of Biosciences, Rice University, Houston, TX 77005
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY 40536
| | - Larissa V. Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY 40536
| | - Thangaiah Subramanian
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536
| | - Mark L. Farman
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546
| | - H. Peter Spielmann
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536
- Department of Chemistry, Markey Cancer Center, Kentucky Center for Structural Biology, University of Kentucky, Lexington, KY 40536
| | | | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY 40536
| | - Shanteri Singh
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY 40536
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35
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Wyche TP, Ruzzini AC, Beemelmanns C, Kim KH, Klassen JL, Cao S, Poulsen M, Bugni TS, Currie CR, Clardy J. Linear Peptides Are the Major Products of a Biosynthetic Pathway That Encodes for Cyclic Depsipeptides. Org Lett 2017; 19:1772-1775. [PMID: 28326787 DOI: 10.1021/acs.orglett.7b00545] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Three new dentigerumycin analogues are produced by Streptomyces sp. M41, a bacterium isolated from a South African termite, Macrotermes natalensis. The structures of the complex nonribosomal peptide synthetase-polyketide synthase (NRPS/PKS) hybrid compounds were determined by 1D- and 2D-NMR spectroscopy, high-resolution mass spectrometry, and circular dichroism (CD) spectroscopy. Both cyclic and linear peptides are reported, and the genetic organization of the NRPS modules within the biosynthetic gene cluster accounts for the observed structural diversity.
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Affiliation(s)
- Thomas P Wyche
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States.,Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin , Madison, Wisconsin 53705, United States
| | - Antonio C Ruzzini
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Christine Beemelmanns
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Ki Hyun Kim
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Jonathan L Klassen
- Department of Bacteriology, University of Wisconsin , Madison, Wisconsin 53706, United States
| | - Shugeng Cao
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Michael Poulsen
- Department of Bacteriology, University of Wisconsin , Madison, Wisconsin 53706, United States
| | - Tim S Bugni
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin , Madison, Wisconsin 53705, United States
| | - Cameron R Currie
- Department of Bacteriology, University of Wisconsin , Madison, Wisconsin 53706, United States
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
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36
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Beemelmanns C, Ramadhar TR, Kim KH, Klassen JL, Cao S, Wyche TP, Hou Y, Poulsen M, Bugni TS, Currie CR, Clardy J. Macrotermycins A-D, Glycosylated Macrolactams from a Termite-Associated Amycolatopsis sp. M39. Org Lett 2017; 19:1000-1003. [PMID: 28207275 DOI: 10.1021/acs.orglett.6b03831] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Bioassay-guided metabolomic analyses led to the characterization of four new 20-membered glycosylated polyketide macrolactams, macrotermycins A-D, from a termite-associated actinomycete, Amycolatopsis sp. M39. M39's sequenced genome revealed the macrotermycin's putative biosynthetic gene cluster. Macrotermycins A and C had antibacterial activity against human-pathogenic Staphylococcus aureus and, of greater ecological relevance, they also had selective antifungal activity against a fungal parasite of the termite fungal garden.
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Affiliation(s)
- Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute , 07745 Jena, Germany
| | - Timothy R Ramadhar
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Ki Hyun Kim
- Natural Product Research Laboratory, School of Pharmacy, Sungkyunkwan University , Suwon 440-746, Republic of Korea
| | - Jonathan L Klassen
- Department of Molecular & Cell Biology, University of Connecticut , Storrs, Connecticut 06269, United States
| | - Shugeng Cao
- Daniel K. Inouye College of Pharmacy, University of Hawaii , Hilo, Hawaii 96720, United States
| | - Thomas P Wyche
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
| | | | - Michael Poulsen
- Centre for Social Evolution, Section for Ecology and Evolution, Department of Biology, University of Copenhagen , 2100 Copenhagen East, Denmark
| | | | | | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , Boston, Massachusetts 02115, United States
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37
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Wang J, Kuang B, Guo X, Liu J, Ding Y, Li J, Jiang S, Liu Y, Bai F, Li L, Zhang Q, Zhu XY, Xia B, Li CQ, Wang L, Yang G, Chen Y. Total Syntheses and Biological Activities of Vinylamycin Analogues. J Med Chem 2017; 60:1189-1209. [DOI: 10.1021/acs.jmedchem.6b01745] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jinghan Wang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Beijia Kuang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xiaoqian Guo
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
- High-throughput
Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin 300457, People’s Republic of China
| | - Jianwei Liu
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yahui Ding
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jiangnan Li
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, People’s Republic of China
| | - Shende Jiang
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, People’s Republic of China
| | - Ying Liu
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Fang Bai
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Luyuan Li
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Quan Zhang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xiao-Yu Zhu
- Hunter Biotechnology,
Inc., F1A, building 5, no. 88 Jiangling
Road, Binjiang Zone, Hangzhou, Zhejiang Province 310051, People’s Republic of China
| | - Bo Xia
- Hunter Biotechnology,
Inc., F1A, building 5, no. 88 Jiangling
Road, Binjiang Zone, Hangzhou, Zhejiang Province 310051, People’s Republic of China
| | - Chun-Qi Li
- Hunter Biotechnology,
Inc., F1A, building 5, no. 88 Jiangling
Road, Binjiang Zone, Hangzhou, Zhejiang Province 310051, People’s Republic of China
| | - Liang Wang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Guang Yang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yue Chen
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
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38
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Song QY, Yu HT, Zhang XX, Nan ZB, Gao K. Dahurelmusin A, a Hybrid Peptide–Polyketide from Elymus dahuricus Infected by the Epichloë bromicola Endophyte. Org Lett 2016; 19:298-300. [DOI: 10.1021/acs.orglett.6b03568] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiu-Yan Song
- State
Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture
Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Hai-Tao Yu
- Institute
of Plant Protection, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
| | - Xing-Xu Zhang
- State
Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture
Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Zhi-Biao Nan
- State
Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture
Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Kun Gao
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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39
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Kang HR, Lee D, Benndorf R, Jung WH, Beemelmanns C, Kang KS, Kim KH. Termisoflavones A-C, Isoflavonoid Glycosides from Termite-Associated Streptomyces sp. RB1. JOURNAL OF NATURAL PRODUCTS 2016; 79:3072-3078. [PMID: 28006913 DOI: 10.1021/acs.jnatprod.6b00738] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Three new isoflavonoid glycosides, termisoflavones A-C (1-3), and eight isoflavonoids (4-11) were isolated from termite-associated Streptomyces sp. RB1 recovered from the cuticle of the South African termite, Macrotermes natalensis. The structures of new compounds were determined by spectroscopic methods including 1D and 2D NMR and HR-MS analysis, as well as comparison of their NMR data with those of related isoflavonoid glycoside derivatives. The absolute configurations of the sugar moieties were clarified by chemical reactions. None of the isolates (1-11) displayed antifungal or antimicrobial activities (MICs > 100 μg/mL), whereas compounds 6 and 11 ameliorated cisplatin-induced kidney cell damage to 80% of the control value at a cisplatin dose of 25 μM.
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Affiliation(s)
- Hee Rae Kang
- School of Pharmacy, Sungkyunkwan University , Suwon 440-746, Republic of Korea
| | - Dahae Lee
- School of Pharmacy, Sungkyunkwan University , Suwon 440-746, Republic of Korea
| | - René Benndorf
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI) , Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Won Hee Jung
- Department of Systems Biotechnology, Chung-Ang University , Anseong, Gyeonggi-do 456-756, Republic of Korea
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI) , Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University , Seongnam 461-701, Republic of Korea
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University , Suwon 440-746, Republic of Korea
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40
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Synthesis of ent-BE-43547A1 reveals a potent hypoxia-selective anticancer agent and uncovers the biosynthetic origin of the APD-CLD natural products. Nat Chem 2016; 9:264-272. [DOI: 10.1038/nchem.2657] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/26/2016] [Indexed: 01/15/2023]
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41
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Komaki H, Ichikawa N, Hosoyama A, Hamada M, Harunari E, Ishikawa A, Igarashi Y. Draft genome sequence of Micromonospora sp. DSW705 and distribution of biosynthetic gene clusters for depsipeptides bearing 4-amino-2,4-pentadienoate in actinomycetes. Stand Genomic Sci 2016; 11:84. [PMID: 27795808 PMCID: PMC5075396 DOI: 10.1186/s40793-016-0206-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 10/12/2016] [Indexed: 11/26/2022] Open
Abstract
Here, we report the draft genome sequence of Micromonospora sp. DSW705 (=NBRC 110037), a producer of antitumor cyclic depsipeptides rakicidins A and B, together with the features of this strain and generation, annotation, and analysis of the genome sequence. The 6.8 Mb genome of Micromonospora sp. DSW705 encodes 6,219 putative ORFs, of which 4,846 are assigned with COG categories. The genome harbors at least three type I polyketide synthase (PKS) gene clusters, one nonribosomal peptide synthetase (NRPS) gene clusters, and three hybrid PKS/NRPS gene clusters. A hybrid PKS/NRPS gene cluster encoded in scaffold 2 is responsible for rakicidin synthesis. DNA database search indicated that the biosynthetic gene clusters for depsipeptides bearing 4-amino-2,4-pentadienoate are widely present in taxonomically diverse actinomycetes.
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Affiliation(s)
- Hisayuki Komaki
- Biological Resource Center, National Institute of Technology and Evaluation, Chiba, Japan
| | | | | | - Moriyuki Hamada
- Biological Resource Center, National Institute of Technology and Evaluation, Chiba, Japan
| | - Enjuro Harunari
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
| | - Arisa Ishikawa
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
| | - Yasuhiro Igarashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
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42
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Komaki H, Ishikawa A, Ichikawa N, Hosoyama A, Hamada M, Harunari E, Nihira T, Panbangred W, Igarashi Y. Draft genome sequence of Streptomyces sp. MWW064 for elucidating the rakicidin biosynthetic pathway. Stand Genomic Sci 2016; 11:83. [PMID: 27785333 PMCID: PMC5073741 DOI: 10.1186/s40793-016-0205-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 10/11/2016] [Indexed: 02/04/2023] Open
Abstract
Streptomyces sp. MWW064 (=NBRC 110611) produces an antitumor cyclic depsipeptide rakicidin D. Here, we report the draft genome sequence of this strain together with features of the organism and generation, annotation and analysis of the genome sequence. The 7.9 Mb genome of Streptomyces sp. MWW064 encoded 7,135 putative ORFs, of which 6,044 were assigned with COG categories. The genome harbored at least three type I polyketide synthase (PKS) gene clusters, seven nonribosomal peptide synthetase (NRPS) gene clusters, and four hybrid PKS/NRPS gene clusters, from which a hybrid PKS/NRPS gene cluster responsible for rakicidin synthesis was successfully identified. We propose the biosynthetic pathway based on bioinformatic analysis, and experimentally proved that the pentadienoyl unit in rakicidins is derived from serine and malonate.
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Affiliation(s)
- Hisayuki Komaki
- Biological Resource Center, National Institute of Technology and Evaluation (NBRC), Chiba, Japan
| | - Arisa Ishikawa
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
| | | | | | - Moriyuki Hamada
- Biological Resource Center, National Institute of Technology and Evaluation (NBRC), Chiba, Japan
| | - Enjuro Harunari
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
| | - Takuya Nihira
- International Center for Biotechnology, Osaka University, Osaka, Japan ; Mahidol University and Osaka University Collaborative Research Center on Bioscience and Biotechnology, Bangkok, Thailand
| | - Watanalai Panbangred
- Mahidol University and Osaka University Collaborative Research Center on Bioscience and Biotechnology, Bangkok, Thailand ; Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Yasuhiro Igarashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Toyama, Japan
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43
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Yang Z, Ma M, Yang CH, Gao Y, Zhang Q, Chen Y. Determination of the Absolute Configurations of Microtermolides A and B. JOURNAL OF NATURAL PRODUCTS 2016; 79:2408-2412. [PMID: 27579840 DOI: 10.1021/acs.jnatprod.5b01143] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Absolute configurations of the three consecutive chiral centers in the cyclic depsipeptide microtermolide A have been tentatively assigned as 2‴R, 3‴R, and 4‴R. However, on the basis of a structural comparison with vinylamycin, another depsipeptide with a unique 4-amino-2,4-pentadienolate structure, the chiral centers could also be assigned as 2‴R, 3‴R, and 4‴S. Here, the first total synthesis of microtermolide A is reported and the configurations of the three consecutive chiral centers were confirmed to be 2‴R, 3‴R, and 4‴S. A similar approach was used to determine the analogous centers in microtermolide B as 2‴R, 3‴R, and 4‴S.
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Affiliation(s)
- Zhantao Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Meiyan Ma
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Chun-Hua Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Yuan Gao
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Quan Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
| | - Yue Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, People's Republic of China
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44
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Nocardia lasii sp. nov., a novel actinomycete isolated from the cuticle of an ant (Lasius fuliginosus L). Antonie van Leeuwenhoek 2016; 109:1513-1520. [DOI: 10.1007/s10482-016-0753-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 08/06/2016] [Indexed: 11/26/2022]
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45
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Book AJ, Lewin GR, McDonald BR, Takasuka TE, Wendt-Pienkowski E, Doering DT, Suh S, Raffa KF, Fox BG, Currie CR. Evolution of High Cellulolytic Activity in Symbiotic Streptomyces through Selection of Expanded Gene Content and Coordinated Gene Expression. PLoS Biol 2016; 14:e1002475. [PMID: 27276034 PMCID: PMC4898821 DOI: 10.1371/journal.pbio.1002475] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 05/05/2016] [Indexed: 11/23/2022] Open
Abstract
The evolution of cellulose degradation was a defining event in the history of life. Without efficient decomposition and recycling, dead plant biomass would quickly accumulate and become inaccessible to terrestrial food webs and the global carbon cycle. On land, the primary drivers of plant biomass deconstruction are fungi and bacteria in the soil or associated with herbivorous eukaryotes. While the ecological importance of plant-decomposing microbes is well established, little is known about the distribution or evolution of cellulolytic activity in any bacterial genus. Here we show that in Streptomyces, a genus of Actinobacteria abundant in soil and symbiotic niches, the ability to rapidly degrade cellulose is largely restricted to two clades of host-associated strains and is not a conserved characteristic of the Streptomyces genus or host-associated strains. Our comparative genomics identify that while plant biomass degrading genes (CAZy) are widespread in Streptomyces, key enzyme families are enriched in highly cellulolytic strains. Transcriptomic analyses demonstrate that cellulolytic strains express a suite of multi-domain CAZy enzymes that are coregulated by the CebR transcriptional regulator. Using targeted gene deletions, we verify the importance of a highly expressed cellulase (GH6 family cellobiohydrolase) and the CebR transcriptional repressor to the cellulolytic phenotype. Evolutionary analyses identify complex genomic modifications that drive plant biomass deconstruction in Streptomyces, including acquisition and selective retention of CAZy genes and transcriptional regulators. Our results suggest that host-associated niches have selected some symbiotic Streptomyces for increased cellulose degrading activity and that symbiotic bacteria are a rich biochemical and enzymatic resource for biotechnology. Cellulose deconstruction helps shape the global carbon cycle; this study shows that high cellulolytic ability evolved in select lineages of the bacterial genus Streptomyces through key changes in gene content and transcriptional regulation. Only specific microbes can deconstruct the vast stores of carbon within plant biomass. Studying the distribution, diversity, and evolution of these cellulolytic organisms improves our understanding of the ecological functions of microbes in the environment and their contributions to the global carbon cycle. The bacterial genus Streptomyces is abundant in soil, appears to readily form symbiotic associations with eukaryotic hosts, and has long been thought to contribute to plant biomass degradation. Here, we show that the ability to rapidly deconstruct cellulose is surprisingly rare in the genus Streptomyces but is enriched in symbiotic stains associated with diverse insect hosts that feed on plant biomass. By using a combination of genomic, transcriptomic, and genetic analyses, we identify key changes in gene content and expression that confer cellulolytic activity. Our results support the idea that a complex interplay of genomic changes, occurring over ancient time scales, shapes the evolution of the ecologically important ability to deconstruct plant biomass.
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Affiliation(s)
- Adam J. Book
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Gina R. Lewin
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Bradon R. McDonald
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Taichi E. Takasuka
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Evelyn Wendt-Pienkowski
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Drew T. Doering
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Steven Suh
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Kenneth F. Raffa
- Department of Entomology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Brian G. Fox
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Cameron R. Currie
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
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46
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Beemelmanns C, Guo H, Rischer M, Poulsen M. Natural products from microbes associated with insects. Beilstein J Org Chem 2016; 12:314-27. [PMID: 26977191 PMCID: PMC4778507 DOI: 10.3762/bjoc.12.34] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/02/2016] [Indexed: 12/11/2022] Open
Abstract
Here we review discoveries of secondary metabolites from microbes associated with insects. We mainly focus on natural products, where the ecological role has been at least partially elucidated, and/or the pharmaceutical properties evaluated, and on compounds with unique structural features. We demonstrate that the exploration of specific microbial–host interactions, in combination with multidisciplinary dereplication processes, has emerged as a successful strategy to identify novel chemical entities and to shed light on the ecology and evolution of defensive associations.
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Affiliation(s)
- Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Huijuan Guo
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Maja Rischer
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Beutenbergstrasse 11a, 07745 Jena, Germany
| | - Michael Poulsen
- Centre for Social Evolution, Section for Ecology and Evolution, Department of Biology, University of Copenhagen, Universitetsparken 15, Building 3, 1st floor, 2100 Copenhagen East, Denmark
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47
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Benjamino J, Graf J. Characterization of the Core and Caste-Specific Microbiota in the Termite, Reticulitermes flavipes. Front Microbiol 2016; 7:171. [PMID: 26925043 PMCID: PMC4756164 DOI: 10.3389/fmicb.2016.00171] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 02/01/2016] [Indexed: 02/01/2023] Open
Abstract
The hindgut of the termite Reticulitermes flavipes harbors a complex symbiotic community consisting of protists, bacteria, and archaea. These symbionts aid in the digestion of lignocellulose from the termite’s wood meal. Termite hindguts were sampled and the V4 hyper-variable region of the 16S rRNA gene was sequenced and analyzed from individual termites. The core microbiota of worker termites consisted of 69 OTUs at the 97% identity level, grouped into 16 taxa, and together accounted for 67.05% of the sequences from the bacterial community. The core was dominated by Treponema, which contained 36 different OTUs and accounted for ∼32% of the sequences, which suggests Treponema sp. have an important impact on the overall physiology in the hindgut. Bray–Curtis beta diversity metrics showed that hindgut samples from termites of the same colony were more similar to each other than to samples from other colonies despite possessing a core that accounted for the majority of the sequences. The specific tasks and dietary differences of the termite castes could have an effect on the composition of the microbial community. The hindgut microbiota of termites from the alate castes differed from the worker caste with significantly lower abundances of Treponema and Endomicrobia, which dominated the hindgut microbiota in workers and soldiers. Protist abundances were also quantified in the same samples using qPCR of the 18S rRNA gene. Parabasalia abundances dropped significantly in the winged alates and the Oxymonadida abundances dropped in both alate castes. These data suggest that the changes in diet or overall host physiology affected the protist and bacterial populations in the hindgut. The in-depth bacterial characterization and protist quantification in this study sheds light on the potential community dynamics within the R. flavipes hindgut and identified a large and complex core microbiota in termites obtained from multiple colonies and castes.
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Affiliation(s)
- Jacquelynn Benjamino
- Department of Molecular and Cell Biology, University of Connecticut, Storrs CT, USA
| | - Joerg Graf
- Department of Molecular and Cell Biology, University of Connecticut, StorrsCT, USA; Institute for Systems Genomics, University of Connecticut, StorrsCT, USA
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48
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Berasategui A, Shukla S, Salem H, Kaltenpoth M. Potential applications of insect symbionts in biotechnology. Appl Microbiol Biotechnol 2016; 100:1567-1577. [PMID: 26659224 PMCID: PMC4737797 DOI: 10.1007/s00253-015-7186-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/15/2015] [Accepted: 11/17/2015] [Indexed: 12/21/2022]
Abstract
Symbiotic interactions between insects and microorganisms are widespread in nature and are often the source of ecological innovations. In addition to supplementing their host with essential nutrients, microbial symbionts can produce enzymes that help degrade their food source as well as small molecules that defend against pathogens, parasites, and predators. As such, the study of insect ecology and symbiosis represents an important source of chemical compounds and enzymes with potential biotechnological value. In addition, the knowledge on insect symbiosis can provide novel avenues for the control of agricultural pest insects and vectors of human diseases, through targeted manipulation of the symbionts or the host-symbiont associations. Here, we discuss different insect-microbe interactions that can be exploited for insect pest and human disease control, as well as in human medicine and industrial processes. Our aim is to raise awareness that insect symbionts can be interesting sources of biotechnological applications and that knowledge on insect ecology can guide targeted efforts to discover microorganisms of applied value.
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Affiliation(s)
- Aileen Berasategui
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena, Germany.
- Biochemistry Department, Max Planck Institute for Chemical Ecology, Jena, Germany.
| | - Shantanu Shukla
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena, Germany
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Hassan Salem
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Martin Kaltenpoth
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Jena, Germany.
- Department for Evolutionary Ecology, Institute of Zoology, Johannes Gutenberg University, Mainz, Germany.
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49
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Sang F, Ding Y, Wang J, Sun B, Sun J, Geng Y, Zhang Z, Ding K, Wu LL, Liu JW, Bai C, Yang G, Zhang Q, Li LY, Chen Y. Structure–Activity Relationship Study of Rakicidins: Overcoming Chronic Myeloid Leukemia Resistance to Imatinib with 4-Methylester-Rakicidin A. J Med Chem 2016; 59:1184-96. [DOI: 10.1021/acs.jmedchem.5b01841] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Feng Sang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
- School
of Life Sciences, Shandong University of Technology, Zibo 255049, People’s Republic of China
| | - Yahui Ding
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jinghan Wang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Bingxia Sun
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jianlei Sun
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yan Geng
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
- High-throughput
Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin 300457, People’s Republic of China
| | - Zhang Zhang
- State
Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Science, 190 Kai Yuan Avenue, Guangzhou 510530, People’s Republic of China
| | - Ke Ding
- State
Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine
and Health, Chinese Academy of Science, 190 Kai Yuan Avenue, Guangzhou 510530, People’s Republic of China
| | - Ling-Ling Wu
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
- High-throughput
Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin 300457, People’s Republic of China
| | - Jian-Wei Liu
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Cuigai Bai
- High-throughput
Molecular Drug Discovery Center, Tianjin International Joint Academy of BioMedicine, Tianjin 300457, People’s Republic of China
| | - Guang Yang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Quan Zhang
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Lu-Yuan Li
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yue Chen
- The
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People’s Republic of China
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50
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Vidyasagar A, Sureshan KM. Total syntheses of five uvacalols: structural validation of uvacalol A, uvacalol B and uvacalol C and disproval of the structures of uvacalol E and uvacalol G. Org Biomol Chem 2015; 13:3900-10. [PMID: 25655990 DOI: 10.1039/c4ob02663b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Uvacalols are novel carbasugars belonging to the family of C7-cyclitols, and are isolated from the roots of the medicinal plant, Uvaria calamistrata. In this study, we report the first syntheses of five uvacalols starting from a cheap and easily available chiral pool starting material, D-mannitol, in their optically pure form. D-Mannitol was converted to the alkene 2 through a series of regioselective and chemoselective transformations by following our previously reported strategies. Alkene 2 was converted to the enal 5 through a series of protective group manipulations. Enal 5 was converted to the diene 6 by the addition of vinyl magnesium bromide. Ring closing metathesis of the diene 6 using Grubbs’ second generation catalyst installed the core cyclohexenyl unit. Through several iterative and selective manipulations of various hydroxyl groups, uvacalol A, uvacalol B, uvacalol C, uvacalol E and uvacalol G were synthesized. A comparison of the (1)H NMR and (13)C NMR data of these synthesized molecules with the reported data, revealed that the reported structures of uvacalols A–C are correct and those of uvacalols E and G are wrong.
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Affiliation(s)
- Adiyala Vidyasagar
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695016, India.
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