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Qadri H, Shah AH, Almilaibary A, Mir MA. Microbiota, natural products, and human health: exploring interactions for therapeutic insights. Front Cell Infect Microbiol 2024; 14:1371312. [PMID: 39035357 PMCID: PMC11257994 DOI: 10.3389/fcimb.2024.1371312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 06/03/2024] [Indexed: 07/23/2024] Open
Abstract
The symbiotic relationship between the human digestive system and its intricate microbiota is a captivating field of study that continues to unfold. Comprising predominantly anaerobic bacteria, this complex microbial ecosystem, teeming with trillions of organisms, plays a crucial role in various physiological processes. Beyond its primary function in breaking down indigestible dietary components, this microbial community significantly influences immune system modulation, central nervous system function, and disease prevention. Despite the strides made in microbiome research, the precise mechanisms underlying how bacterial effector functions impact mammalian and microbiome physiology remain elusive. Unlike the traditional DNA-RNA-protein paradigm, bacteria often communicate through small molecules, underscoring the imperative to identify compounds produced by human-associated bacteria. The gut microbiome emerges as a linchpin in the transformation of natural products, generating metabolites with distinct physiological functions. Unraveling these microbial transformations holds the key to understanding the pharmacological activities and metabolic mechanisms of natural products. Notably, the potential to leverage gut microorganisms for large-scale synthesis of bioactive compounds remains an underexplored frontier with promising implications. This review serves as a synthesis of current knowledge, shedding light on the dynamic interplay between natural products, bacteria, and human health. In doing so, it contributes to our evolving comprehension of microbiome dynamics, opening avenues for innovative applications in medicine and therapeutics. As we delve deeper into this intricate web of interactions, the prospect of harnessing the power of the gut microbiome for transformative medical interventions becomes increasingly tantalizing.
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Affiliation(s)
- Hafsa Qadri
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Abdul Haseeb Shah
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Abdullah Almilaibary
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
- Department of Family and Community Medicine, Faculty of Medicine, Al Baha University, Al Bahah, Saudi Arabia
| | - Manzoor Ahmad Mir
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
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Supty MSA, Jahan K, Lee JS, Choi KH. Epiphytic Bacterial Community Analysis of Ulva prolifera in Garorim and Muan Bays, Republic of Korea. Microorganisms 2024; 12:1142. [PMID: 38930524 PMCID: PMC11205692 DOI: 10.3390/microorganisms12061142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/16/2024] [Accepted: 06/02/2024] [Indexed: 06/28/2024] Open
Abstract
The bacterial communities related to seaweed can vary considerably across different locations, and these variations influence the seaweed's nutrition, growth, and development. To study this further, we evaluated the bacteria found on the green marine seaweed Ulva prolifera from Garorim Bay and Muan Bay, two key locations on Republic of Korea's west coast. Our analysis found notable differences in the bacterial communities between the two locations. Garorim Bay hosted a more diverse bacterial population, with the highest number of ASVs (871) compared to Muan Bay's 156 ASVs. In Muan Bay, more than 50% of the bacterial community was dominated by Pseudomonadota. On the other hand, Garorim Bay had a more balanced distribution between Bacteroidota and Pseudomonadota (37% and 35.5%, respectively). Additionally, Cyanobacteria, particularly Cyanothece aeruginosa, were found in significant numbers in Garorim Bay, making up 8% of the community. Mineral analysis indicated that Garorim Bay had higher levels of S, Na, Mg, Ca, and Fe. Function-wise, both locations exhibited bacterial enrichment in amino acid production, nucleosides, and nucleotide pathways. In conclusion, this study broadens our understanding of the bacterial communities associated with Ulva prolifera in Korean waters and provides a foundation for future research on the relationships between U. prolifera and its bacteria.
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Affiliation(s)
| | | | | | - Keun-Hyung Choi
- Department of Earth, Environmental and Space Sciences, Chungnam National University, Daejeon 34134, Republic of Korea
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3
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Du YE, Cui J, Cho E, Hwang S, Jang YJ, Oh KB, Nam SJ, Oh DC. Serratiomycins D1-D3, Antibacterial Cyclic Peptides from a Serratia sp. and Structure Revision of Serratiomycin. JOURNAL OF NATURAL PRODUCTS 2024; 87:1330-1337. [PMID: 38687892 DOI: 10.1021/acs.jnatprod.3c00993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Serratiomycin (1) is an antibacterial cyclic depsipeptide, first discovered from a Eubacterium culture in 1998. This compound was initially reported to contain l-Leu, l-Ser, l-allo-Thr, d-Phe, d-Ile, and hydroxydecanoic acid. In the present study, 1 and three new derivatives, serratiomycin D1-D3 (2-4), were isolated from a Serratia sp. strain isolated from the exoskeleton of a long-horned beetle. The planar structures of 1-4 were elucidated by using mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. Comparison of the NMR chemical shifts and the physicochemical data of 1 to those of previously reported serratiomycin indeed identified 1 as serratiomycin. The absolute configurations of the amino units in compounds 1-4 were determined by the advanced Marfey's method, 2,3,4,6-tetra-O-acetyl-β-d-glucopyranosyl isothiocyanate derivatization, and liquid chromatography-mass spectrometric (LC-MS) analysis. Additionally, methanolysis and the modified Mosher's method were used to determine the absolute configuration of (3R)-hydroxydecanoic acid in 1. Consequently, the revised structure of 1 was found to possess d-Leu, l-Ser, l-Thr, d-Phe, l-allo-Ile, and d-hydroxydecanoic acid. In comparison with the previously published structure of serratiomycin, l-Leu, l-allo-Thr, and d-Ile in serratiomycin were revised to d-Leu, l-Thr, and l-allo-Ile. The new members of the serratiomycin family, compounds 2 and 3, showed considerably higher antibacterial activities against Staphylococcus aureus and Salmonella enterica than compound 1.
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Affiliation(s)
- Young Eun Du
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jinsheng Cui
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eunji Cho
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Sunghoon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yong-Joon Jang
- Natura Academia Research Center, Seoul 08826, Republic of Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences and Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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4
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Holland DC, Carroll AR. Marine indole alkaloid diversity and bioactivity. What do we know and what are we missing? Nat Prod Rep 2023; 40:1595-1607. [PMID: 36790012 DOI: 10.1039/d2np00085g] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Covering: marine indole alkaloids (n = 2048) and their reported bioactivities up to the end of 2021Despite increasing numbers of marine natural products (MNPs) reported each year, most have only been examined for cytotoxic, antibacterial, and/or antifungal biological activities with the majority found to be inactive in these assays. In this context, why are natural products continuing to be examined in assays they are unlikely to show significant activity in, and what targets might be more useful for expanding knowledge of their biologically relevant chemical space? We have undertaken a meta-analysis of the biological activities for 2048 marine indole alkaloids (MIAs), a diverse sub-class of MNPs reported up to the end of 2021, and this has highlighted that the bioactivity potentials for up to 86% of published MIAs remains underexplored and/or undefined. Although most published MIAs are not cytotoxic or antimicrobial, there is a continued focus on using these assays to evaluate new structurally related analogues. Using cheminformatics analyses, the chemical diversity of the 2048 MIAs were clustered using fragment based fingerprints and their reported bioactivity potency towards specific disease targets was assessed for structure activity trends. These analyses showed that there are groups of MIAs that possess potent and diverse activities and that many analogues, previously tested only in cellular toxicity assays, could be better exploited to generate structure activity relationships associated with leads to treat emerging diseases. A collection of indole drug and drug-lead structures from non-natural sources were also incorporated into the dataset providing complementary bioactivity profiles that were further used to predict underexplored areas of potential new activity and to better direct future testing of MIAs. Our findings clearly suggest the biological evaluation of MIAs continues to be conducted on a narrow range of bioassays and disease targets, and that shifting the focus to non-toxic disease targets should provide expanded knowledge of biologically relevant chemical space aimed at maximising the potential of MIAs for drug discovery.
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Affiliation(s)
- Darren C Holland
- School of Environment and Science, Griffith University, Gold Coast, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.
| | - Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.
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5
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Jeremia L, Deprez BE, Dey D, Conn GL, Wuest WM. Ribosome-targeting antibiotics and resistance via ribosomal RNA methylation. RSC Med Chem 2023; 14:624-643. [PMID: 37122541 PMCID: PMC10131624 DOI: 10.1039/d2md00459c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 02/17/2023] [Indexed: 03/05/2023] Open
Abstract
The rise of multidrug-resistant bacterial infections is a cause of global concern. There is an urgent need to both revitalize antibacterial agents that are ineffective due to resistance while concurrently developing new antibiotics with novel targets and mechanisms of action. Pathogen associated resistance-conferring ribosomal RNA (rRNA) methyltransferases are a growing threat that, as a group, collectively render a total of seven clinically-relevant ribosome-targeting antibiotic classes ineffective. Increasing frequency of identification and their growing prevalence relative to other resistance mechanisms suggests that these resistance determinants are rapidly spreading among human pathogens and could contribute significantly to the increased likelihood of a post-antibiotic era. Herein, with a view toward stimulating future studies to counter the effects of these rRNA methyltransferases, we summarize their prevalence, the fitness cost(s) to bacteria of their acquisition and expression, and current efforts toward targeting clinically relevant enzymes of this class.
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Affiliation(s)
- Learnmore Jeremia
- Department of Chemistry, Emory University 1515 Dickey Dr. Atlanta GA 30322 USA
| | - Benjamin E Deprez
- Department of Chemistry, Emory University 1515 Dickey Dr. Atlanta GA 30322 USA
| | - Debayan Dey
- Department of Biochemistry, Emory University School of Medicine 1510 Clifton Rd. Atlanta GA 30322 USA
| | - Graeme L Conn
- Department of Biochemistry, Emory University School of Medicine 1510 Clifton Rd. Atlanta GA 30322 USA
- Emory Antibiotic Resistance Center, Emory University School of Medicine 1510 Clifton Rd. Atlanta GA 30322 USA
| | - William M Wuest
- Department of Chemistry, Emory University 1515 Dickey Dr. Atlanta GA 30322 USA
- Emory Antibiotic Resistance Center, Emory University School of Medicine 1510 Clifton Rd. Atlanta GA 30322 USA
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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7
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Büttner H, Pidot SJ, Scherlach K, Hertweck C. Endofungal bacteria boost anthelminthic host protection with the biosurfactant symbiosin. Chem Sci 2022; 14:103-112. [PMID: 36605741 PMCID: PMC9769094 DOI: 10.1039/d2sc04167g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/20/2022] [Indexed: 11/22/2022] Open
Abstract
Effective protection of soil fungi from predators is crucial for their survival in the niche. Thus, fungi have developed efficient defence strategies. We discovered that soil beneficial Mortierella fungi employ a potent cytotoxin (necroxime) against fungivorous nematodes. Interestingly, this anthelminthic agent is produced by bacterial endosymbionts (Candidatus Mycoavidus necroximicus) residing within the fungus. Analysis of the symbiont's genome indicated a rich biosynthetic potential, yet nothing has been known about additional metabolites and their potential synergistic functions. Here we report that two distinct Mortierella endosymbionts produce a novel cyclic lipodepsipeptide (symbiosin), that is clearly of bacterial origin, but has striking similarities to various fungal specialized metabolites. The structure and absolute configuration of symbiosin were fully elucidated. By comparative genomics of symbiosin-positive strains and in silico analyses of the deduced non-ribosomal synthetases, we assigned the (sym) biosynthetic gene cluster and proposed an assembly line model. Bioassays revealed that symbiosin is not only an antibiotic, in particular against mycobacteria, but also exhibits marked synergistic effects with necroxime in anti-nematode tests. By functional analyses and substitution experiments we found that symbiosin is a potent biosurfactant and that this particular property confers a boost in the anthelmintic action, similar to formulations of therapeutics in human medicine. Our findings illustrate that "combination therapies" against parasites already exist in ecological contexts, which may inspire the development of biocontrol agents and therapeutics.
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Affiliation(s)
- Hannah Büttner
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute (Leibniz-HKI)Beutenbergstrasse 11a07745 JenaGermany
| | - Sacha J. Pidot
- Department of Microbiology and Immunology, Doherty Institute792 Elizabeth StreetMelbourne3000Australia
| | - Kirstin Scherlach
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute (Leibniz-HKI)Beutenbergstrasse 11a07745 JenaGermany
| | - Christian Hertweck
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute (Leibniz-HKI)Beutenbergstrasse 11a07745 JenaGermany,Institute of Microbiology, Faculty of Biological Sciences, Friedrich Schiller University Jena07743 JenaGermany
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8
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Miller RD, Iinishi A, Modaresi SM, Yoo BK, Curtis TD, Lariviere PJ, Liang L, Son S, Nicolau S, Bargabos R, Morrissette M, Gates MF, Pitt N, Jakob RP, Rath P, Maier T, Malyutin AG, Kaiser JT, Niles S, Karavas B, Ghiglieri M, Bowman SEJ, Rees DC, Hiller S, Lewis K. Computational identification of a systemic antibiotic for gram-negative bacteria. Nat Microbiol 2022; 7:1661-1672. [PMID: 36163500 PMCID: PMC10155127 DOI: 10.1038/s41564-022-01227-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 08/05/2022] [Indexed: 12/14/2022]
Abstract
Discovery of antibiotics acting against Gram-negative species is uniquely challenging due to their restrictive penetration barrier. BamA, which inserts proteins into the outer membrane, is an attractive target due to its surface location. Darobactins produced by Photorhabdus, a nematode gut microbiome symbiont, target BamA. We reasoned that a computational search for genes only distantly related to the darobactin operon may lead to novel compounds. Following this clue, we identified dynobactin A, a novel peptide antibiotic from Photorhabdus australis containing two unlinked rings. Dynobactin is structurally unrelated to darobactins, but also targets BamA. Based on a BamA-dynobactin co-crystal structure and a BAM-complex-dynobactin cryo-EM structure, we show that dynobactin binds to the BamA lateral gate, uniquely protruding into its β-barrel lumen. Dynobactin showed efficacy in a mouse systemic Escherichia coli infection. This study demonstrates the utility of computational approaches to antibiotic discovery and suggests that dynobactin is a promising lead for drug development.
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Affiliation(s)
- Ryan D Miller
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Akira Iinishi
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | | | - Byung-Kuk Yoo
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Thomas D Curtis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Patrick J Lariviere
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Libang Liang
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Sangkeun Son
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Samantha Nicolau
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Rachel Bargabos
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Madeleine Morrissette
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Michael F Gates
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Norman Pitt
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | | | | | - Timm Maier
- Biozentrum, University of Basel, Basel, Switzerland
| | - Andrey G Malyutin
- Beckman Institute, California Institute of Technology, Pasadena, CA, USA
| | - Jens T Kaiser
- Beckman Institute, California Institute of Technology, Pasadena, CA, USA
| | - Samantha Niles
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Blake Karavas
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Meghan Ghiglieri
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Sarah E J Bowman
- National Crystallization Center, Hauptman-Woodward Medical Research Institute, Buffalo, NY, USA
| | - Douglas C Rees
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA
| | | | - Kim Lewis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA.
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9
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Alarcon-Enos J, Quiroz-Carreño S, Muñoz-Nuñez E, Silva FL, Devotto-Moreno L, Seigler DS, Pastene-Navarrete E, Cespedes-Acuña CL. Cyclopeptide alkaloids from Discaria chacaye (Rhamnaceae) as result of symbiosis with Frankia (Actinomycetales). Chem Biodivers 2022; 19:e202200630. [PMID: 35916106 DOI: 10.1002/cbdv.202200630] [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: 06/29/2022] [Accepted: 07/27/2022] [Indexed: 11/07/2022]
Abstract
Cyclopeptide alkaloids with different biological activities are present in plants of the family Rhamnaceae. Plants of this family grow in a symbiotic relationship with aerobic Gram-positive actinomycetes belonging to the genus Frankia . This goal of this research was a study of the comparative profile of alkaloids present in Discaria chacaye and to establish a connection between the presence or absence of Frankia sp. and the alkaloids. In addition, insecticidal activities of the alkaloidal extract were examined. A total of 24 alkaloids were identified, of which 12 have a benzylisoquinoline skeleton, 9 were cyclopeptides, 2 isoquinolines, and 1 an aporphine. The presence of cyclopeptide alkaloids is associated with Frankia nodules in the plant root. The alkaloid extracts showed insecticidal activity with mortality dose-dependence and LD 50 values between 44 to 71 µg/mL.
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Affiliation(s)
- Julio Alarcon-Enos
- Universidad del Bio Bio, Ciencias Basicas, Avenida Andrés Bello 720, 38000708, Chillan, CHILE
| | - Soledad Quiroz-Carreño
- Universidad del Bio-Bio - Sede Chillan, Ciencias Básicas, Avenida Andrés Bello 720, 38000708, Chillan, CHILE
| | - Evelyn Muñoz-Nuñez
- Universidad del Bio-Bio - Sede Chillan, Ciencias Básicas, Avenida Andrés Bello 720, 38000708, Chillan, CHILE
| | - Fabiana L Silva
- Universidade Paulista Campus de Bauru Instituto de Ciências de Saúde: Universidade Paulista Campus de Bauru Instituto de Ciencias de Saude, Instituto de Ciencias da Saude, Av. Brigadeiro Luís Antônio, 3751, Sao Paulo, BRAZIL
| | - Luis Devotto-Moreno
- INIA: Instituto de Investigaciones Agropecuarias, Control Biológico, Av Vicente Mendez s7n, Chillan, CHILE
| | - David S Seigler
- : University of Illinois Urbana-Champaign Department of Chemistry, Deparment of Plant Biology, 1909 South Oak Street, Urbana-Champaing, UNITED STATES
| | - Edgar Pastene-Navarrete
- Universidad del Bio-Bio - Sede Chillan, Ciencias Básicas, Av Andres Bello 720, Chillan, CHILE
| | - Carlos L Cespedes-Acuña
- Universidad del Bio-Bio - Sede Chillan, Ciencias Básicas, Av Andres Bello 720, Chillan, CHILE
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Comparative Metagenomic Analysis of Biosynthetic Diversity across Sponge Microbiomes Highlights Metabolic Novelty, Conservation, and Diversification. mSystems 2022; 7:e0035722. [PMID: 35862823 PMCID: PMC9426513 DOI: 10.1128/msystems.00357-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Marine sponges and their microbial symbiotic communities are rich sources of diverse natural products (NPs) that often display biological activity, yet little is known about the global distribution of NPs and the symbionts that produce them. Since the majority of sponge symbionts remain uncultured, it is a challenge to characterize their NP biosynthetic pathways, assess their prevalence within the holobiont, and measure the diversity of NP biosynthetic gene clusters (BGCs) across sponge taxa and environments. Here, we explore the microbial biosynthetic landscapes of three high-microbial-abundance (HMA) sponges from the Atlantic Ocean and the Mediterranean Sea. This data set reveals striking novelty, with <1% of the recovered gene cluster families (GCFs) showing similarity to any characterized BGC. When zooming in on the microbial communities of each sponge, we observed higher variability of specialized metabolic and taxonomic profiles between sponge species than within species. Nonetheless, we identified conservation of GCFs, with 20% of sponge GCFs being shared between at least two sponge species and a GCF core comprised of 6% of GCFs shared across all species. Within this functional core, we identified a set of widespread and diverse GCFs encoding nonribosomal peptide synthetases that are potentially involved in the production of diversified ether lipids, as well as GCFs putatively encoding the production of highly modified proteusins. The present work contributes to the small, yet growing body of data characterizing NP landscapes of marine sponge symbionts and to the cryptic biosynthetic potential contained in this environmental niche. IMPORTANCE Marine sponges and their microbial symbiotic communities are a rich source of diverse natural products (NPs). However, little is known about the sponge NP global distribution landscape and the symbionts that produce them. Here, we make use of recently developed tools to perform untargeted mining and comparative analysis of sponge microbiome metagenomes of three sponge species in the first study considering replicate metagenomes of multiple sponge species. We present an overview of the biosynthetic diversity across these sponge holobionts, which displays extreme biosynthetic novelty. We report not only the conservation of biosynthetic and taxonomic diversity but also a core of conserved specialized metabolic pathways. Finally, we highlight several novel GCFs with unknown ecological function, and observe particularly high biosynthetic potential in Acidobacteriota and Latescibacteria symbionts. This study paves the way toward a better understanding of the marine sponge holobionts' biosynthetic potential and the functional and ecological role of sponge microbiomes.
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11
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Abstract
With the overmining of actinomycetes for compounds acting against Gram-negative pathogens, recent efforts to discover novel antibiotics have been focused on other groups of bacteria. Teixobactin, the first antibiotic without detectable resistance that binds lipid II, comes from an uncultured Eleftheria terra, a betaproteobacterium; odilorhabdins, from Xenorhabdus, are broad-spectrum inhibitors of protein synthesis, and darobactins from Photorhabdus target BamA, the essential chaperone of the outer membrane of Gram-negative bacteria. Xenorhabdus and Photorhabdus are symbionts of the nematode gut microbiome and attractive producers of secondary metabolites. Only small portions of their biosynthetic gene clusters (BGC) are expressed in vitro. To access their silent operons, we first separated extracts from a small library of isolates into fractions, resulting in 200-fold concentrated material, and then screened them for antimicrobial activity. This resulted in a hit with selective activity against Escherichia coli, which we identified as a novel natural product antibiotic, 3′-amino 3′-deoxyguanosine (ADG). Mutants resistant to ADG mapped to gsk and gmk, kinases of guanosine. Biochemical analysis shows that ADG is a prodrug that is converted into an active ADG triphosphate (ADG-TP), a mimic of GTP. ADG incorporates into a growing RNA chain, interrupting transcription, and inhibits cell division, apparently by interfering with the GTPase activity of FtsZ. Gsk of the purine salvage pathway, which is the first kinase in the sequential phosphorylation of ADG, is restricted to E. coli and closely related species, explaining the selectivity of the compound. There are probably numerous targets of ADG-TP among GTP-dependent proteins. The discovery of ADG expands our knowledge of prodrugs, which are rare among natural compounds.
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Yang Y, Zhu Y, Liu H, Wei J, Yu H, Dong B. Cultivation of gut microorganisms of the marine ascidian Halocynthia roretzi reveals their potential roles in the environmental adaptation of their host. MARINE LIFE SCIENCE & TECHNOLOGY 2022; 4:201-207. [PMID: 37073224 PMCID: PMC10077266 DOI: 10.1007/s42995-022-00131-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 03/28/2022] [Indexed: 05/03/2023]
Abstract
It has long been known that abundant symbiotic bacteria exist in the tunic and gut of marine ascidians, and that these play crucial roles in host development, physiological metabolism, and environmental adaptation. However, the identity, roles and functions of these symbiotic bacteria are known for only a few strains. In this study, we isolated and cultivated 263 strains of microorganisms from the intestine of the marine ascidian Halocynthia roretzi through a combination of aerobic and anaerobic culture approaches. Most cultivated species, both aerobic and anaerobic, from ascidian stool samples belonged to the genus Bacillus based on 16S rDNA sequencing identification and phylogenetic assays. The distribution of cultured bacteria varied with seasonal changes in environmental conditions. To explore the functions of cultured bacteria, we screened out a strain of Serratia sp. whose extracts showed high antibacterial activity against aquatic pathogens. These findings revealed the potential roles of gut microorganisms in ascidian defense and environmental adaptation, thus providing insights into the interaction and co-evolution between gut bacteria and their hosts. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-022-00131-4.
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Affiliation(s)
- Yang Yang
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Yuting Zhu
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Haiming Liu
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Jiankai Wei
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Haiyan Yu
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Bo Dong
- Ministry of Education Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003 China
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13
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An JS, Lim HJ, Lee JY, Jang YJ, Nam SJ, Lee SK, Oh DC. Hamuramicin C, a Cytotoxic Bicyclic Macrolide Isolated from a Wasp Gut Bacterium. JOURNAL OF NATURAL PRODUCTS 2022; 85:936-942. [PMID: 35362983 DOI: 10.1021/acs.jnatprod.1c01075] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A new bicyclic macrolide, hamuramicin C (1), was isolated from Streptomyces sp. MBP16, a gut bacterial strain of the wasp Vespa crabro flavofasciata. Its 22-membered macrocyclic lactone structure was determined by NMR and mass spectrometry. The relative configurations of hamuramicin C (1) were assigned by J-based configuration analysis utilizing 1H rotating frame Overhauser effect spectroscopy and heteronuclear long-range coupling NMR spectroscopy. Genomic and bioinformatic analyses of the bacterial strain enabled identification of the type-I polyketide synthase pathway, which employs a trans-acyltransferase system. The absolute configurations of 1 were proposed based on the analysis of the sequences of ketoreductases in the modular gene cluster. Moreover, hamuramicin C (1) demonstrated significant inhibitory activity against diverse human cancer cell lines (HCT116, A549, SNU-638, SK-HEP-1, and MDA-MB-231).
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Affiliation(s)
- Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyung-Ju Lim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Ji Yun Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yong-Joon Jang
- Natura Center of Life and Environment, Seoul 08826, Republic of Korea
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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14
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Das S, Wadud MA, Chakraborty S, Khokon MAR. Biorational management of root-knot of brinjal (Solanum melongena L.) caused by Meloidogyne javanica. Heliyon 2022; 8:e09227. [PMID: 35392394 PMCID: PMC8980756 DOI: 10.1016/j.heliyon.2022.e09227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 12/26/2021] [Accepted: 03/28/2022] [Indexed: 11/29/2022] Open
Abstract
Production of brinjal (Solanum melongena L.) is considerably reduced by infestations of root-knot nematodes (RKN). As chemical pesticides are increasingly being regulated globally, scientists are focusing on biorational management. An experiment was undertaken to screen resistant brinjal cultivars in Bangladesh against Meloidogyne javanica in a pot trial. Pot and field trials were also conducted to evaluate the efficacy and profitability of individual and combined applications of several biorational components to manage M. javanica on brinjal. Of twenty brinjal cultivars screened, cv. Noagram was found ‘moderately resistant’ and others were ‘susceptible’ to ‘highly susceptible’ against M. javanica. In both pot and field trials, most of the growth parameters of brinjal and reproductive parameters of M. javanica were significantly different than the control for both the individual and combined treatments of different biorational components which included cabbage, marigold, vermicompost, biogas digestate, Bacillus subtilis and Pseudomonas fluorescens. The yield was significantly higher for the combined treatments than the individual applications. The benefit-cost ratio (BCR) differed among the treatments. The highest yield (29.5 t/ha) and BCR (3.67) with the lowest reproductive factor (0.33) was obtained by the combined application of biogas digestate and B. subtilis. This is the first report on the efficiency and profitability assessment of biogas digestate in combination with a bio-agent in addressing the management of RKN, which might be very important considering the global concern of environmental pollution. The cultivar Noagram might be a potential source of resistant genes in brinjal against M. javanica.
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Affiliation(s)
- Sukalpa Das
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh
- Department of Agricultural Extension, Bangladesh
| | - Md. Abdul Wadud
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh
- Bangladesh Agricultural Research Institute, Bangladesh
| | - Shila Chakraborty
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md. Atiqur Rahman Khokon
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh
- Corresponding author.
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15
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Pathak K, Pathak MP, Saikia R, Gogoi U, Sahariah JJ, Zothantluanga JH, Samanta A, Das A. Cancer Chemotherapy via Natural Bioactive Compounds. Curr Drug Discov Technol 2022; 19:e310322202888. [PMID: 35362385 DOI: 10.2174/1570163819666220331095744] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/29/2021] [Accepted: 12/17/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND Cancer-induced mortality is increasingly prevalent globally which skyrocketed the necessity to discover new/novel safe and effective anticancer drugs. Cancer is characterized by the continuous multiplication of cells in the human which is unable to control. Scientific research is drawing its attention towards naturally-derived bioactive compounds as they have fewer side effects compared to the current synthetic drugs used for chemotherapy. OBJECTIVE Drugs isolated from natural sources and their role in the manipulation of epigenetic markers in cancer are discussed briefly in this review article. METHODS With advancing medicinal plant biotechnology and microbiology in the past century, several anticancer phytomedicines were developed. Modern pharmacopeia contains at least 25% herbal-based remedy including clinically used anticancer drugs. These drugs mainly include the podophyllotoxin derivatives vinca alkaloids, curcumin, mistletoe plant extracts, taxanes, camptothecin, combretastatin, and others including colchicine, artesunate, homoharringtonine, ellipticine, roscovitine, maytanasin, tapsigargin,andbruceantin. RESULTS Compounds (psammaplin, didemnin, dolastin, ecteinascidin,and halichondrin) isolated from marine sources and animals such as microalgae, cyanobacteria, heterotrophic bacteria, invertebrates. They have been evaluated for their anticancer activity on cells and experimental animal models and used chemotherapy.Drug induced manipulation of epigenetic markers plays an important role in the treatment of cancer. CONCLUSION The development of a new drug from isolated bioactive compounds of plant sources has been a feasible way to lower the toxicity and increase their effectiveness against cancer. Potential anticancer therapeutic leads obtained from various ethnomedicinal plants, foods, marine, and microorganisms are showing effective yet realistically safe pharmacological activity. This review will highlight important plant-based bioactive compounds like curcumin, stilbenes, terpenes, other polyphenolic phyto-compounds, and structurally related families that are used to prevent/ ameliorate cancer. However, a contribution from all possible fields of science is still a prerequisite for discovering safe and effective anticancer drugs.
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Affiliation(s)
- Kalyani Pathak
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - Manash Pratim Pathak
- Faculty of Pharmaceutical Sciences, Assam down town University, Panikhaiti, Guwahati-781026, Assam, India
| | - Riya Saikia
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - Urvashee Gogoi
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - Jon Jyoti Sahariah
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - James H Zothantluanga
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - Abhishek Samanta
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
| | - Aparoop Das
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786004, Assam, India
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16
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Zhai YJ, Huo GM, Wei J, Lin LB, Zhang Q, Li JN, Chen X, Han WB, Gao JM. Structures and absolute configurations of butenolide derivatives from the isopod-associated fungus Pidoplitchkoviella terricola. PHYTOCHEMISTRY 2022; 193:112981. [PMID: 34653910 DOI: 10.1016/j.phytochem.2021.112981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 10/04/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
In this research, twenty aromatic and branched aliphatic polyketides, including seven previously undescribed butenolide derivatives, piterriones A-G and one known analogue, along with twelve known altenusin derivatives, were isolated from the isopod-associated fungus Pidoplitchkoviella terricola. Their structures were elucidated by analysis of NMR (1D and 2D) and mass spectrometry data, and their absolute configurations were determined by Mosher's method, microscale derivatization, and comparison of their specific rotations and ECD spectra. Dihydroaltenuene B exhibited mushroom tyrosinase inhibitory activity with an IC50 value of 38.33 ± 1.59 μM, which was comparable to that of the positive control, kojic acid (IC50 = 39.72 ± 1.34 μM). A molecular-docking study disclosed the hydrogen bonding interactions between the 3-OH and 4'-OH of dihydroaltenuene B and the His244, Met280 and Gly281 residues of tyrosinase.
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Affiliation(s)
- Yi-Jie Zhai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Guang-Ming Huo
- Institute of Medicinal Fungi, School of Food Science, Nanjing Xiaozhuang University, Nanjing, Jiangsu, 210017, People's Republic of China
| | - Jing Wei
- College of Biology Pharmacy & Food Engineering, Shangluo University, Shangluo, 726000, Shaanxi, People's Republic of China
| | - Li-Bin Lin
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Qiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Jian-Nan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Xin Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China
| | - Wen-Bo Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China.
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shaanxi, China.
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17
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Böhringer N, Green R, Liu Y, Mettal U, Marner M, Modaresi SM, Jakob RP, Wuisan ZG, Maier T, Iinishi A, Hiller S, Lewis K, Schäberle TF. Mutasynthetic Production and Antimicrobial Characterization of Darobactin Analogs. Microbiol Spectr 2021; 9:e0153521. [PMID: 34937193 PMCID: PMC8694152 DOI: 10.1128/spectrum.01535-21] [Citation(s) in RCA: 25] [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: 09/10/2021] [Accepted: 11/15/2021] [Indexed: 12/15/2022] Open
Abstract
There is great need for therapeutics against multidrug-resistant, Gram-negative bacterial pathogens. Recently, darobactin A, a novel bicyclic heptapeptide that selectively kills Gram-negative bacteria by targeting the outer membrane protein BamA, was discovered. Its efficacy was proven in animal infection models of Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa, thus promoting darobactin A as a promising lead compound. Originally discovered from members of the nematode-symbiotic genus Photorhabdus, the biosynthetic gene cluster (BGC) encoding the synthesis of darobactin A can also be found in other members of the class Gammaproteobacteria. Therein, the precursor peptides DarB to -F, which differ in their core sequence from darobactin A, were identified in silico. Even though production of these analogs was not observed in the putative producer strains, we were able to generate them by mutasynthetic derivatization of a heterologous expression system. The analogs generated were isolated and tested for their bioactivity. The most potent compound, darobactin B, was used for cocrystallization with the target BamA, revealing a binding site identical to that of darobactin A. Despite its potency, darobactin B did not exhibit cytotoxicity, and it was slightly more active against Acinetobacter baumannii isolates than darobactin A. Furthermore, we evaluated the plasma protein binding of darobactin A and B, indicating their different pharmacokinetic properties. This is the first report on new members of this new antibiotic class, which is likely to expand to several promising therapeutic candidates. IMPORTANCE Therapeutic options to combat Gram-negative bacterial pathogens are dwindling with increasing antibiotic resistance. This study presents a proof of concept for the heterologous-expression approach to expand on the novel antibiotic class of darobactins and to generate analogs with different activities and pharmacokinetic properties. In combination with the structural data of the target BamA, this approach may contribute to structure-activity relationship (SAR) data to optimize inhibitors of this essential outer membrane protein of Gram-negative pathogens.
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Affiliation(s)
- Nils Böhringer
- Justus-Liebig-University Gießen, Gießen, Germany
- German Center of Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Gießen, Germany
| | - Robert Green
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Yang Liu
- Justus-Liebig-University Gießen, Gießen, Germany
| | - Ute Mettal
- Justus-Liebig-University Gießen, Gießen, Germany
| | - Michael Marner
- Fraunhofer Institute for Molecular Biology and Applied Ecology, Branch for Bioresources, Gießen, Germany
| | | | | | | | - Timm Maier
- Biozentrum, University of Basel, Basel, Switzerland
| | - Akira Iinishi
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | | | - Kim Lewis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Till F. Schäberle
- Justus-Liebig-University Gießen, Gießen, Germany
- German Center of Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Gießen, Germany
- Fraunhofer Institute for Molecular Biology and Applied Ecology, Branch for Bioresources, Gießen, Germany
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18
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DeWeese KJ, Osborne MG. Understanding the metabolome and metagenome as extended phenotypes: The next frontier in macroalgae domestication and improvement. JOURNAL OF THE WORLD AQUACULTURE SOCIETY 2021; 52:1009-1030. [PMID: 34732977 PMCID: PMC8562568 DOI: 10.1111/jwas.12782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 02/25/2021] [Indexed: 06/01/2023]
Abstract
"Omics" techniques (including genomics, transcriptomics, metabolomics, proteomics, and metagenomics) have been employed with huge success in the improvement of agricultural crops. As marine aquaculture of macroalgae expands globally, biologists are working to domesticate species of macroalgae by applying these techniques tested in agriculture to wild macroalgae species. Metabolomics has revealed metabolites and pathways that influence agriculturally relevant traits in crops, allowing for informed crop crossing schemes and genomic improvement strategies that would be pivotal to inform selection on macroalgae for domestication. Advances in metagenomics have improved understanding of host-symbiont interactions and the potential for microbial organisms to improve crop outcomes. There is much room in the field of macroalgal biology for further research toward improvement of macroalgae cultivars in aquaculture using metabolomic and metagenomic analyses. To this end, this review discusses the application and necessary expansion of the omics tool kit for macroalgae domestication as we move to enhance seaweed farming worldwide.
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Affiliation(s)
- Kelly J DeWeese
- Molecular and Computational Biology Section, Department of Biological Sciences, University of Southern California, California, Los Angeles
| | - Melisa G Osborne
- Molecular and Computational Biology Section, Department of Biological Sciences, University of Southern California, California, Los Angeles
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19
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Nguyen NA, Lin Z, Mohanty I, Garg N, Schmidt EW, Agarwal V. An Obligate Peptidyl Brominase Underlies the Discovery of Highly Distributed Biosynthetic Gene Clusters in Marine Sponge Microbiomes. J Am Chem Soc 2021; 143:10221-10231. [PMID: 34213321 DOI: 10.1021/jacs.1c03474] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Marine sponges are prolific sources of bioactive natural products, several of which are produced by bacteria symbiotically associated with the sponge host. Bacteria-derived natural products, and the specialized bacterial symbionts that synthesize them, are not shared among phylogenetically distant sponge hosts. This is in contrast to nonsymbiotic culturable bacteria in which the conservation of natural products and natural product biosynthetic gene clusters (BGCs) is well established. Here, we demonstrate the widespread conservation of a BGC encoding a cryptic ribosomally synthesized and post-translationally modified peptide (RiPP) in microbiomes of phylogenetically and geographically dispersed sponges from the Pacific and Atlantic oceans. Detection of this BGC was enabled by mining for halogenating enzymes in sponge metagenomes, which, in turn, allowed for the description of a broad-spectrum regiospecific peptidyl tryptophan-6-brominase which possessed no chlorination activity. In addition, we demonstrate the cyclodehydrative installation of azoline heterocycles in proteusin RiPPs. This is the first demonstration of halogenation and cyclodehydration for proteusin RiPPs and the enzymes catalyzing these transformations were found to competently interact with other previously described proteusin substrate peptides. Within a sponge microbiome, many different generalized bacterial taxa harbored this BGC with often more than 50 copies of the BGC detected in individual sponge metagenomes. Moreover, the BGC was found in all sponges queried that possess high diversity microbiomes but it was not detected in other marine invertebrate microbiomes. These data shed light on conservation of cryptic natural product biosynthetic potential in marine sponges that was not detected by traditional natural product-to-BGC (meta)genome mining.
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Affiliation(s)
- Nguyet A Nguyen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Ipsita Mohanty
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Neha Garg
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Eric W Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Vinayak Agarwal
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.,School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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20
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Silva M, Seijas P, Otero P. Exploitation of Marine Molecules to Manage Alzheimer's Disease. Mar Drugs 2021; 19:md19070373. [PMID: 34203244 PMCID: PMC8307759 DOI: 10.3390/md19070373] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/17/2021] [Accepted: 06/23/2021] [Indexed: 02/07/2023] Open
Abstract
Neurodegenerative diseases are sociosanitary challenges of today, as a result of increased average life expectancy, with Alzheimer’s disease being one of the most prevalent. This pathology is characterized by brain impairment linked to a neurodegenerative process culminating in cognitive decline and behavioral disorders. Though the etiology of this pathology is still unknown, it is usually associated with the appearance of senile plaques and neurofibrillary tangles. The most used prophylaxis relies on anticholinesterase drugs and NMDA receptor antagonists, whose main action is to relieve symptoms and not to treat or prevent the disease. Currently, the scientific community is gathering efforts to disclose new natural compounds effective against Alzheimer’s disease and other neurodegenerative pathologies. Marine natural products have been shown to be promising candidates, and some have been proven to exert a high neuroprotection effect, constituting a large reservoir of potential drugs and nutraceutical agents. The present article attempts to describe the processes of extraction and isolation of bioactive compounds derived from sponges, algae, marine bacteria, invertebrates, crustaceans, and tunicates as drug candidates against AD, with a focus on the success of pharmacological activity in the process of finding new and effective drug compounds.
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Affiliation(s)
- Marisa Silva
- MARE—Marine and Environmental Sciences Centre, Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal;
- Department of Plant Biology, Faculty of Science, University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal
| | - Paula Seijas
- Department of Pharmacology, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Paz Otero
- Department of Pharmacology, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain;
- Department of Production and Characterization of Novel Foods, Institute of Food Science Research (CIAL), Campus of International Excellence UAM+CSIC, 28049 Madrid, Spain
- Nutrition and Bromatology Group, CITACA, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, 32004 Ourense, Spain
- Correspondence: or
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21
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Lewis K. At the Crossroads of Bioenergetics and Antibiotic Discovery. BIOCHEMISTRY (MOSCOW) 2021; 85:1469-1483. [PMID: 33705287 DOI: 10.1134/s0006297920120019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Dr. Vladimir Skulachev was my mentor, and his pioneering work in the field of bioenergetics inspired the discoveries described in this review, written in the form of a personal account of events. Examining basic mechanisms of chemiosmotic coupling unexpectedly led us to transenvelope multidrug resistance pumps (MDR pumps) that severely limit development of novel antibiotics. One of the major advances of Skulachev and his group was the discovery of the mitochondrial membrane potential with the use of permeant cations such as TPP+, which served as electric probes. We describe our finding of their natural counterparts in plants, where they act as antimicrobials. The most challenging problems in antimicrobial drug discovery are antibiotic tolerance of chronic infections caused by dormant persister cells; antibiotic resistance, responsible for the current antimicrobial resistance crisis (AMR); and finding novel compounds acting against Gram-negative bacteria, protected by their powerful multidrug resistance pumps. Our study of persisters shows that these are rare cells formed by stochastic fluctuation in expression of Krebs cycle enzymes, leading to a drop in ATP, target shutdown, and antibiotic tolerance. Searching for compounds that can corrupt targets in the absence of ATP, we identified acyldepsipeptide (ADEP) that activates the ClpP protease, forcing cells to self-digest. Growing previously uncultured bacteria led us to teixobactin, a novel cell wall acting antibiotic. Teixobactin avoids efflux by targeting lipid II and lipid III, precursors of peptidoglycan and wall teichoic acid, located on the surface. The targets are immutable, and teixobactin is the first antibiotic with no detectable resistance. Our search for compounds acting against Gram-negative bacteria led to the discovery of darobactins, which also hit a surface target, the essential chaperone BamA.
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Affiliation(s)
- K Lewis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA 02115, USA.
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22
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Zhou LF, Wu J, Li S, Li Q, Jin LP, Yin CP, Zhang YL. Antibacterial Potential of Termite-Associated Streptomyces spp. ACS OMEGA 2021; 6:4329-4334. [PMID: 33623843 PMCID: PMC7893633 DOI: 10.1021/acsomega.0c05580] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Twenty-one strains of termite-associated actinomycetes were tested for their activities against three bacteria. The results showed that nine strains showed bacteriostatic activities against at least one tested bacterium, and the actinomycete YH01, which was isolated from the body surface of the queen of Odontotermes formosanus, had potent antibacterial activity. The YH01 was further identified as Streptomyces davaonensis. Two metabolites roseoflavin (1) and 8-methylamino-8-demethyl-d-riboflavin (2) were isolated and purified from S. davaonensis YH01. Their structures were determined by NMR, MS, and the related literature. The metabolite 1 showed strong inhibition activities against Bacillus subtilis (MIC = 1.56 μg/mL) and Staphylococcus aureus (MIC = 3.125 μg/mL), which were comparable to referenced gentamycin sulfate, with MIC values of 1.56 and 1.56 μg/mL, respectively. Furthermore, the anti-MRSA potential of compound 1 was determined against nine kinds of MRSA strains, with inhibition zones in the ranges of 12.7-19.7 mm under a concentration of 15 μg/6 mm discs and 18.3-22.7 mm under a concentration of 30 μg/6 mm discs. However, metabolite 1 had no inhibitory effect on Gram-negative bacteria. These results suggested that roseoflavin produced by YH01 holds promise for use against Gram-positive bacteria, especially to MRSA.
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Affiliation(s)
- Ling-Feng Zhou
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Jun Wu
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Shuai Li
- College
of Chemistry and Life Sciences, Zhejiang
Normal University, Jinhua 321004, People’s Republic
of China
| | - Qi Li
- Zhejiang
Jinhua Guangfu Hospital, Jinhua 321004, People’s Republic
of China
| | - Li-Ping Jin
- College
of Chemistry and Life Sciences, Zhejiang
Normal University, Jinhua 321004, People’s Republic
of China
| | - Cai-Ping Yin
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Ying-Lao Zhang
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
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23
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Das S, Abdul Wadud M, Atiqur Rahman Khokon M. Functional evaluation of culture filtrates of Bacillus subtilis and Pseudomonas fluorescens on the mortality and hatching of Meloidogyne javanica. Saudi J Biol Sci 2021; 28:1318-1323. [PMID: 33613061 PMCID: PMC7878824 DOI: 10.1016/j.sjbs.2020.11.055] [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: 09/29/2020] [Revised: 11/15/2020] [Accepted: 11/15/2020] [Indexed: 11/25/2022] Open
Abstract
Rhizospheric bacteria Bacillus subtilis and Pseudomonas fluorescens are two widely tested biological control agents against root-knot nematodes (RKN) of different crops. However, their performance as bio-control agents varies with their place of origin. Culture filtrates of rhizospheric bacteria contain some intermediary metabolites that have nematicidal activity. An in vitro experiment was undertaken to evaluate the functionality of culture filtrates of B. subtilis (MN252542.1) and P. fluorescens (MN256394.1) at different concentrations (1.0%, 2.5%, 5.0%, 7.0%, 10.0% and 25.0%) on the hatching and mortality of Meloidogyne javanica at different time span. Bacterial strains were isolated from rhizospheric soils of Bangladesh. At three days after incubation (DAI), 25.0% concentration of culture filtrates of both B. subtilis and P. fluorescens showed 100.0% mortality of second stage juveniles (J2) of M. javanica. Additionally, 25.0% concentration of culture filtrates of both bacteria showed 100.0% inhibition of hatching at one week after incubation (WAI). A decreasing trend in hatching of M. javanica was observed with the increment of the concentration of culture filtrates and progression of incubation time. The findings of this experiment reveal that culture filtrates of these accessions of B. subtilis and P. fluorescens are effective for controlling M. javanica and would be potential candidates for developing bio-nematicides.
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Affiliation(s)
- Sukalpa Das
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, Bangladesh & Department of Agricultural Extension, Bangladesh
| | - Md. Abdul Wadud
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh & Bangladesh Agriculture Research Institute, Bangladesh
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Buommino E, Vollaro A, Nocera FP, Lembo F, DellaGreca M, De Martino L, Catania MR. Synergistic Effect of Abietic Acid with Oxacillin against Methicillin-Resistant Staphylococcus pseudintermedius. Antibiotics (Basel) 2021; 10:antibiotics10010080. [PMID: 33467635 PMCID: PMC7830589 DOI: 10.3390/antibiotics10010080] [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: 12/10/2020] [Revised: 01/07/2021] [Accepted: 01/13/2021] [Indexed: 12/11/2022] Open
Abstract
Resin acids are valued in traditional medicine for their antiseptic properties. Among these, abietic acid has been reported to be active against methicillin-resistant Staphylococcus aureus (MRSA) strains. In veterinary healthcare, the methicillin-resistant Staphylococcus pseudintermedius (MRSP) strain is an important reservoir of antibiotic resistance genes including mecA. The incidence of MRSP has been increasing, and treatment options in veterinary medicine are partial. Here, we investigated the antimicrobial and antibiofilm properties of abietic acid against three MRSP and two methicillin-susceptible Staphylococcus pseudintermedius (MSSP) strains, isolated from diseased pet animals and human wound samples. Abietic acid showed a significant minimal inhibitory concentration (MIC) value ranging from 32 to 64 μg/mL (MRSPs) and 8 μg/mL (MSSP). By checkerboard method we demonstrated that abietic acid increased oxacillin susceptibility of MRSP strains, thus showing a synergistic interaction with oxacillin. Abietic acid was also able to contrast the vitality of treated MSSP and MRSP1 biofilms at 20 μg/mL and 40 μg/mL, respectively. Finally, the compound moderately reduced mecA, mecR1 and mec1 gene expression. In conclusion, the results here reported demonstrate the antimicrobial activity of abietic acid against MRSP and support the use of this compound as a potential therapeutic agent to be used in combinatorial antibiotic therapy.
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Affiliation(s)
- Elisabetta Buommino
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy;
- Correspondence: ; Tel.: +39-081-678510
| | - Adriana Vollaro
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (A.V.); (M.R.C.)
| | - Francesca P. Nocera
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80137 Naples, Italy; (F.P.N.); (L.D.M.)
| | - Francesca Lembo
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy;
| | - Marina DellaGreca
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy;
| | - Luisa De Martino
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80137 Naples, Italy; (F.P.N.); (L.D.M.)
| | - Maria R. Catania
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (A.V.); (M.R.C.)
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Niehs SP, Kumpfmüller J, Dose B, Little RF, Ishida K, Flórez LV, Kaltenpoth M, Hertweck C. Insect-Associated Bacteria Assemble the Antifungal Butenolide Gladiofungin by Non-Canonical Polyketide Chain Termination. Angew Chem Int Ed Engl 2020; 59:23122-23126. [PMID: 32588959 PMCID: PMC7756420 DOI: 10.1002/anie.202005711] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/10/2020] [Indexed: 12/17/2022]
Abstract
Genome mining of one of the protective symbionts (Burkholderia gladioli) of the invasive beetle Lagria villosa revealed a cryptic gene cluster that codes for the biosynthesis of a novel antifungal polyketide with a glutarimide pharmacophore. Targeted gene inactivation, metabolic profiling, and bioassays led to the discovery of the gladiofungins as previously-overlooked components of the antimicrobial armory of the beetle symbiont, which are highly active against the entomopathogenic fungus Purpureocillium lilacinum. By mutational analyses, isotope labeling, and computational analyses of the modular polyketide synthase, we found that the rare butenolide moiety of gladiofungins derives from an unprecedented polyketide chain termination reaction involving a glycerol-derived C3 building block. The key role of an A-factor synthase (AfsA)-like offloading domain was corroborated by CRISPR-Cas-mediated gene editing, which facilitated precise excision within a PKS domain.
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Affiliation(s)
- Sarah P. Niehs
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
| | - Jana Kumpfmüller
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
| | - Benjamin Dose
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
| | - Rory F. Little
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
| | - Keishi Ishida
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
| | - Laura V. Flórez
- Department for Evolutionary EcologyInstitute of Organismic and Molecular EvolutionJohannes Gutenberg University MainzHanns-Dieter-Hüsch-Weg 1555128MainzGermany
| | - Martin Kaltenpoth
- Department for Evolutionary EcologyInstitute of Organismic and Molecular EvolutionJohannes Gutenberg University MainzHanns-Dieter-Hüsch-Weg 1555128MainzGermany
| | - Christian Hertweck
- Department of Biomolecular ChemistryLeibniz Institute for Natural Product Research and Infection Biology, HKIBeutenbergstr. 11a07745JenaGermany
- Faculty of Biological SciencesFriedrich Schiller University Jena07743JenaGermany
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Niehs SP, Kumpfmüller J, Dose B, Little RF, Ishida K, Flórez LV, Kaltenpoth M, Hertweck C. Insect‐Associated Bacteria Assemble the Antifungal Butenolide Gladiofungin by Non‐Canonical Polyketide Chain Termination. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sarah P. Niehs
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
| | - Jana Kumpfmüller
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
| | - Benjamin Dose
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
| | - Rory F. Little
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
| | - Keishi Ishida
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
| | - Laura V. Flórez
- Department for Evolutionary Ecology Institute of Organismic and Molecular Evolution Johannes Gutenberg University Mainz Hanns-Dieter-Hüsch-Weg 15 55128 Mainz Germany
| | - Martin Kaltenpoth
- Department for Evolutionary Ecology Institute of Organismic and Molecular Evolution Johannes Gutenberg University Mainz Hanns-Dieter-Hüsch-Weg 15 55128 Mainz Germany
| | - Christian Hertweck
- Department of Biomolecular Chemistry Leibniz Institute for Natural Product Research and Infection Biology, HKI Beutenbergstr. 11a 07745 Jena Germany
- Faculty of Biological Sciences Friedrich Schiller University Jena 07743 Jena Germany
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27
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Sharma N, Khanna K, Manhas RK, Bhardwaj R, Ohri P, Alkahtani J, Alwahibi MS, Ahmad P. Insights into the Role of Streptomyces hydrogenans as the Plant Growth Promoter, Photosynthetic Pigment Enhancer and Biocontrol Agent against Meloidogyne incognita in Solanum lycopersicum Seedlings. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1109. [PMID: 32867342 PMCID: PMC7570317 DOI: 10.3390/plants9091109] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 12/17/2022]
Abstract
Root-knot nematodes (RKN), Meloidogyne sp. hinders functioning of crops and causes global losses in terms of productivity and yield. Meloidogyne sp. are microscopic, obligatory endoparasites with ubiquitous distribution in different parts of the world. Taking into consideration these aspects, the present study was conducted to explore nematicidal activity of the Streptomyces hydrogenans strain DH-16 against M. incognita to regulate its pathogenicity in plants. In-vitro experimentation revealed that pretreated seeds with solvent and culture supernatant lowered root galls in infested plants and promoted growth of Solanum lycopersicum seedlings, revealed through the morphological analysis. Additionally, antioxidative defense responses were induced with microbes. However, oxidative stress markers were considerably reduced after microbial inoculations. Apart from this, secondary metabolites were assessed and modulated in RKN infested plants on microbial supplementations. Confocal studies evaluated glutathione accumulation within root apices and its enhancement was directly proportional to defense responses. Therefore, the current study concluded the role of S. hydrogenans in stimulating antioxidant potential against RKN along with growth promoting aids. Thus, the outcome of the current study endorses that metabolites produced by S. hydrogenans can be used as safe biocontrol agents against M. incognita and also as plant growth promoting agents.
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Affiliation(s)
- Nandni Sharma
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India;
| | - Kanika Khanna
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab 143005, India; (K.K.); (R.B.)
| | - Rajesh Kumari Manhas
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab 143005, India;
| | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab 143005, India; (K.K.); (R.B.)
| | - Puja Ohri
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab 143005, India;
| | - Jawaher Alkahtani
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (J.A.); (M.S.A.)
| | - Mona S. Alwahibi
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (J.A.); (M.S.A.)
| | - Parvaiz Ahmad
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (J.A.); (M.S.A.)
- Department of Botany, S.P. College Srinagar, Jammu and Kashmir 190001, India
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Manici LM, Saccà ML, Lodesani M. Secondary Metabolites Produced by Honey Bee-Associated Bacteria for Apiary Health: Potential Activity of Platynecine. Curr Microbiol 2020; 77:3441-3449. [PMID: 32757039 DOI: 10.1007/s00284-020-02153-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 07/28/2020] [Indexed: 12/19/2022]
Abstract
Secondary metabolites of bacteria associated with honey bees were evaluated as part of an investigation on their potentiality for apiary health. Low molecular weight compounds released into culture filtrates by the four bacterial isolates taken from surface of healthy honey bees were analyzed using time-of-flight mass spectrometry. Only one low molecular weight compound was found in the culture filtrate of each isolate. Bacillus thuringiensis, Bifidobacterium asteroides and Acetobacteraceae bacterium, released into culture filtrates platynecine, a pyrrolizidine alkaloid of plant origin, which, until now, had never been reported as produced by bacteria. Lactobacillus kunkeei produced a 3,5-dinitropyridine, of unknown biological action never associated so far to bacteria. The highest relative concentration of platynecine was detected in B. thuringiensis (100%), B. asteroides and A. bacterium showed a concentration above 50% and below 25% that concentration. An in vitro assay on the potential for controlling the parasitic mite Varroa destructor by the culture filtrates of the three platynecine-producing bacteria was performed. Varroa mite mortality was proportional to the platynecine relative concentration into culture filtrate. Although miticidal activity of B. thuringiensis might be associated to other toxic proteins produced by this species, B. asteroides toxicity toward V. destructor along with the other findings of this study support the hypothesis that platynecine plays a direct or an indirect role in controlling varroa. Findings of this study suggest that secondary metabolites released by honey bee-associated bacteria represent a source of natural compounds to be considered in the challenge for counteracting the colony decline.
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Affiliation(s)
- L M Manici
- Council for Agricultural Research and Economics (CREA), Research Center for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy. .,CREA-AA, via di Corticella 133, Bologna, Italy.
| | - M L Saccà
- Council for Agricultural Research and Economics (CREA), Research Center for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy
| | - M Lodesani
- Council for Agricultural Research and Economics (CREA), Research Center for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy
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Antibacterial and cytotoxic metabolites of termite-associated Streptomyces sp. BYF63. J Antibiot (Tokyo) 2020; 73:766-771. [PMID: 32533072 DOI: 10.1038/s41429-020-0334-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/12/2020] [Accepted: 05/12/2020] [Indexed: 12/17/2022]
Abstract
Four anthraquinone derivatives, termstrin A, B, C and D (1-4), were isolated and purified from termite-associated Streptomyces sp. BYF63. Their structures were elucidated on the basis of extensive spectroscopic analyses (HR-ESI-MS, 1D and 2D NMR). Compounds 1 and 4 were found to possess potent antibacterial activities against Staphylococcus aureus, with the zone of inhibition (ZOI) values of 12.85 and 11.17 mm, respectively, which were comparable to that of penicillin sodium with ZOI of 13.15 mm. Furthermore, metabolite 1 showed moderate cytotoxicities against melanoma cell line A375 and gastric cancer cell line MGC-803, with IC50 values of 22.76 and 36.65 μM, respectively, which were less than those of referenced adriamycin.
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30
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Wenski SL, Cimen H, Berghaus N, Fuchs SW, Hazir S, Bode HB. Fabclavine diversity in Xenorhabdus bacteria. Beilstein J Org Chem 2020; 16:956-965. [PMID: 32461774 PMCID: PMC7214866 DOI: 10.3762/bjoc.16.84] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 04/23/2020] [Indexed: 12/18/2022] Open
Abstract
The global threat of multiresistant pathogens has to be answered by the development of novel antibiotics. Established antibiotic applications are often based on so-called secondary or specialized metabolites (SMs), identified in large screening approaches. To continue this successful strategy, new sources for bioactive compounds are required, such as the bacterial genera Xenorhabdus or Photorhabdus. In these strains, fabclavines are widely distributed SMs with a broad-spectrum bioactivity. Fabclavines are hybrid SMs derived from nonribosomal peptide synthetases (NRPS), polyunsaturated fatty acid (PUFA), and polyketide synthases (PKS). Selected Xenorhabdus and Photorhabdus mutant strains were generated applying a chemically inducible promoter in front of the suggested fabclavine (fcl) biosynthesis gene cluster (BGC), followed by the analysis of the occurring fabclavines. Subsequently, known and unknown derivatives were identified and confirmed by MALDI-MS and MALDI-MS2 experiments in combination with an optimized sample preparation. This led to a total number of 22 novel fabclavine derivatives in eight strains, increasing the overall number of fabclavines to 32. Together with the identification of fabclavines as major antibiotics in several entomopathogenic strains, our work lays the foundation for the rapid fabclavine identification and dereplication as the basis for future work of this widespread and bioactive SM class.
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Affiliation(s)
- Sebastian L Wenski
- Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Harun Cimen
- Adnan Menderes University, Faculty of Arts and Sciences, Department of Biology, 09010 Aydin, Turkey
| | - Natalie Berghaus
- Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Sebastian W Fuchs
- Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Selcuk Hazir
- Adnan Menderes University, Faculty of Arts and Sciences, Department of Biology, 09010 Aydin, Turkey
| | - Helge B Bode
- Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe Universität Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
- Senckenberg Gesellschaft für Naturforschung, Senckenberganlage 25, 60325 Frankfurt am Main, Germany
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31
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Sorokina M, Steinbeck C. Review on natural products databases: where to find data in 2020. J Cheminform 2020; 12:20. [PMID: 33431011 PMCID: PMC7118820 DOI: 10.1186/s13321-020-00424-9] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/22/2020] [Indexed: 02/06/2023] Open
Abstract
Natural products (NPs) have been the centre of attention of the scientific community in the last decencies and the interest around them continues to grow incessantly. As a consequence, in the last 20 years, there was a rapid multiplication of various databases and collections as generalistic or thematic resources for NP information. In this review, we establish a complete overview of these resources, and the numbers are overwhelming: over 120 different NP databases and collections were published and re-used since 2000. 98 of them are still somehow accessible and only 50 are open access. The latter include not only databases but also big collections of NPs published as supplementary material in scientific publications and collections that were backed up in the ZINC database for commercially-available compounds. Some databases, even published relatively recently are already not accessible anymore, which leads to a dramatic loss of data on NPs. The data sources are presented in this manuscript, together with the comparison of the content of open ones. With this review, we also compiled the open-access natural compounds in one single dataset a COlleCtion of Open NatUral producTs (COCONUT), which is available on Zenodo and contains structures and sparse annotations for over 400,000 non-redundant NPs, which makes it the biggest open collection of NPs available to this date.
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Affiliation(s)
- Maria Sorokina
- University Friedrich-Schiller, Lessing Strasse 8, 07743 Jena, Germany
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32
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Lewis K. The Science of Antibiotic Discovery. Cell 2020; 181:29-45. [DOI: 10.1016/j.cell.2020.02.056] [Citation(s) in RCA: 209] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/18/2020] [Accepted: 02/26/2020] [Indexed: 02/07/2023]
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Zhao L, Vo TD, Kaiser M, Bode HB. Phototemtide A, a Cyclic Lipopeptide Heterologously Expressed from Photorhabdus temperata Meg1, Shows Selective Antiprotozoal Activity. Chembiochem 2020; 21:1288-1292. [PMID: 31814269 PMCID: PMC7317862 DOI: 10.1002/cbic.201900665] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Indexed: 12/20/2022]
Abstract
A new cyclic lipopeptide, phototemtide A (1), was isolated from Escherichia coli expressing the biosynthetic gene cluster pttABC from Photorhabdus temperata Meg1. The structure of 1 was elucidated by HR-ESI-MS and NMR experiments. The absolute configurations of amino acids and 3-hydroxyoctanoic acid in 1 were determined by using the advanced Marfey's method and comparison after total synthesis of 1, respectively. Additionally, three new minor derivatives, phototemtides B-D (2-4), were identified by detailed HPLC-MS analysis. Phototemtide A (1) showed weak antiprotozoal activity against Plasmodium falciparum, with an IC50 value of 9.8 μm. The biosynthesis of phototemtides A-D (1-4) was also proposed.
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Affiliation(s)
- Lei Zhao
- Molecular Biotechnology, Department of Biosciences, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438, Frankfurt am Main, Germany.,Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, QianHuHouCun 1, 210014, Nanjing, China
| | - Tien Duy Vo
- Molecular Biotechnology, Department of Biosciences, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438, Frankfurt am Main, Germany
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002, Basel, Switzerland
| | - Helge B Bode
- Molecular Biotechnology, Department of Biosciences, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438, Frankfurt am Main, Germany.,Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University Frankfurt, Max-von-Laue-Strasse 15, 60438, Frankfurt am Main, Germany
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Esposito-Polesi NP. Contaminação versus manifestação endofítica: implicações no cultivo in vitro de plantas. RODRIGUÉSIA 2020. [DOI: 10.1590/2175-7860202071072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Resumo A cultura de tecidos vegetais é imprescindível à propagação e multiplicação uniforme de plantas, à conservação de germoplasma, a programas de melhoramento e à transformação genética. Essa técnica tem exigido, cada vez mais, estudos que colaborem com o entendimento dos mecanismos envolvidos no crescimento dos microrganismos nos meios de cultivo, bem como as relações que eles estabelecem com a planta hospedeira. Dessa maneira, a presente revisão pretende esclarecer esses questionamentos e promover a distinção entre contaminação e manifestação endofítica que ocorrem no cultivo in vitro por diferentes causas. Tal distinção permite diminuir o pânico que se instala quando do seu aparecimento, além de auxiliar na adoção de medidas de prevenção e/ou controle desses eventos sem que haja descartes desnecessários de material de alto valor comercial e genético.
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Dou X, Dong B. Origins and Bioactivities of Natural Compounds Derived from Marine Ascidians and Their Symbionts. Mar Drugs 2019; 17:md17120670. [PMID: 31795141 PMCID: PMC6950356 DOI: 10.3390/md17120670] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 02/07/2023] Open
Abstract
Marine ascidians are becoming important drug sources that provide abundant secondary metabolites with novel structures and high bioactivities. As one of the most chemically prolific marine animals, more than 1200 inspirational natural products, such as alkaloids, peptides, and polyketides, with intricate and novel chemical structures have been identified from ascidians. Some of them have been successfully developed as lead compounds or highly efficient drugs. Although numerous compounds that exist in ascidians have been structurally and functionally identified, their origins are not clear. Interestingly, growing evidence has shown that these natural products not only come from ascidians, but they also originate from symbiotic microbes. This review classifies the identified natural products from ascidians and the associated symbionts. Then, we discuss the diversity of ascidian symbiotic microbe communities, which synthesize diverse natural products that are beneficial for the hosts. Identification of the complex interactions between the symbiont and the host is a useful approach to discovering ways that direct the biosynthesis of novel bioactive compounds with pharmaceutical potentials.
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Affiliation(s)
- Xiaoju Dou
- Laboratory of Morphogenesis & Evolution, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China;
- College of Agricultural Science and Technology, Tibet Vocational Technical College, Lhasa 850030, China
| | - Bo Dong
- Laboratory of Morphogenesis & Evolution, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China;
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
- Correspondence: ; Tel.: +86-0532-82032732
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36
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Imai Y, Meyer KJ, Iinishi A, Favre-Godal Q, Green R, Manuse S, Caboni M, Mori M, Niles S, Ghiglieri M, Honrao C, Ma X, Guo JJ, Makriyannis A, Linares-Otoya L, Böhringer N, Wuisan ZG, Kaur H, Wu R, Mateus A, Typas A, Savitski MM, Espinoza JL, O'Rourke A, Nelson KE, Hiller S, Noinaj N, Schäberle TF, D'Onofrio A, Lewis K. A new antibiotic selectively kills Gram-negative pathogens. Nature 2019; 576:459-464. [PMID: 31747680 PMCID: PMC7188312 DOI: 10.1038/s41586-019-1791-1] [Citation(s) in RCA: 402] [Impact Index Per Article: 80.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 11/08/2019] [Indexed: 11/16/2022]
Abstract
The current need for novel antibiotics is especially acute for
drug-resistant Gram-negative pathogens1,2. These
microorganisms have a highly restrictive permeability barrier, which limits
penetration of most compounds3,4. As a result, the last class of
antibiotics acting against Gram-negative bacteria was developed in the
60s2. We reason that
useful compounds can be found in bacteria that share similar requirements for
antibiotics with humans, and focus on Photorhabdus symbionts of
entomopathogenic nematode microbiomes. Here we report a new antibiotic that we
name darobactin, from a screen of Photorhabdus isolates.
Darobactin is coded by a silent operon with little production under laboratory
conditions, and is ribosomally synthesized. Darobactin has an unusual structure
with two fused rings that form post-translationally. The compound is active
against important Gram-negative pathogens both in vitro and in
animal models of infection. Mutants resistant to darobactin map to BamA, an
essential chaperone and translocator that folds outer membrane proteins. Our
study suggests that bacterial symbionts of animals harbor antibiotics that are
particularly suitable for development into therapeutics.
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Affiliation(s)
- Yu Imai
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Kirsten J Meyer
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Akira Iinishi
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Quentin Favre-Godal
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Robert Green
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Sylvie Manuse
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Mariaelena Caboni
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Miho Mori
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Samantha Niles
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Meghan Ghiglieri
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Chandrashekhar Honrao
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, Boston, MA, USA
| | - Xiaoyu Ma
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, Boston, MA, USA
| | - Jason J Guo
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, Boston, MA, USA.,Barnett Institute for Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA
| | - Alexandros Makriyannis
- Center for Drug Discovery, Department of Pharmaceutical Sciences, Northeastern University, Boston, MA, USA
| | - Luis Linares-Otoya
- Institute for Insect Biotechnology, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Nils Böhringer
- Institute for Insect Biotechnology, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Zerlina G Wuisan
- Institute for Insect Biotechnology, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Hundeep Kaur
- Biozentrum, University of Basel, Basel, Switzerland
| | - Runrun Wu
- Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN, USA.,Markey Center for Structural Biology, Department of Biological Sciences, Purdue University, West Lafayette, IN, USA
| | - André Mateus
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Athanasios Typas
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Mikhail M Savitski
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Josh L Espinoza
- Department of Human Biology, J. Craig Venter Institute, La Jolla, CA, USA.,Department of Genomic Medicine, J. Craig Venter Institute, La Jolla, CA, USA
| | - Aubrie O'Rourke
- Department of Human Biology, J. Craig Venter Institute, La Jolla, CA, USA.,Department of Genomic Medicine, J. Craig Venter Institute, La Jolla, CA, USA
| | - Karen E Nelson
- Department of Human Biology, J. Craig Venter Institute, La Jolla, CA, USA.,Department of Genomic Medicine, J. Craig Venter Institute, La Jolla, CA, USA.,Department of Human Biology, J. Craig Venter Institute, Rockville, MD, USA.,Department of Genomic Medicine, J. Craig Venter Institute, Rockville, MD, USA
| | | | - Nicholas Noinaj
- Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN, USA.,Markey Center for Structural Biology, Department of Biological Sciences, Purdue University, West Lafayette, IN, USA
| | - Till F Schäberle
- Institute for Insect Biotechnology, Justus-Liebig-University of Giessen, Giessen, Germany.,Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany.,German Center for Infection Research (DZIF), Partner Site Giessen-Marburg-Langen, Giessen, Germany
| | - Anthony D'Onofrio
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA
| | - Kim Lewis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, MA, USA.
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37
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Shi YM, Bode HB. Chemical language and warfare of bacterial natural products in bacteria-nematode-insect interactions. Nat Prod Rep 2019; 35:309-335. [PMID: 29359226 DOI: 10.1039/c7np00054e] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Covering: up to November 2017 Organismic interaction is one of the fundamental principles for survival in any ecosystem. Today, numerous examples show the interaction between microorganisms like bacteria and higher eukaryotes that can be anything between mutualistic to parasitic/pathogenic symbioses. There is also increasing evidence that microorganisms are used by higher eukaryotes not only for the supply of essential factors like vitamins but also as biological weapons to protect themselves or to kill other organisms. Excellent examples for such systems are entomopathogenic nematodes of the genera Heterorhabditis and Steinernema that live in mutualistic symbiosis with bacteria of the genera Photorhabdus and Xenorhabdus, respectively. Although these systems have been used successfully in organic farming on an industrial scale, it was only shown during the last 15 years that several different natural products (NPs) produced by the bacteria play key roles in the complex life cycle of the bacterial symbionts, the nematode host and the insect prey that is killed by and provides nutrients for the nematode-bacteria pair. Since the bacteria can switch from mutualistic to pathogenic lifestyle, interacting with two different types of higher eukaryotes, and since the full system with all players can be established in the lab, they are promising model systems to elucidate the natural function of microbial NPs. This review summarizes the current knowledge as well as open questions for NPs from Photorhabdus and Xenorhabdus and tries to assign their roles in the tritrophic relationship.
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Affiliation(s)
- Yi-Ming Shi
- Merck-Stiftungsprofessur für Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Frankfurt am Main 60438, Germany
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38
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Schorn MA, Jordan PA, Podell S, Blanton JM, Agarwal V, Biggs JS, Allen EE, Moore BS. Comparative Genomics of Cyanobacterial Symbionts Reveals Distinct, Specialized Metabolism in Tropical Dysideidae Sponges. mBio 2019; 10:e00821-19. [PMID: 31088928 PMCID: PMC6520454 DOI: 10.1128/mbio.00821-19] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 01/22/2023] Open
Abstract
Marine sponges are recognized as valuable sources of bioactive metabolites and renowned as petri dishes of the sea, providing specialized niches for many symbiotic microorganisms. Sponges of the family Dysideidae are well documented to be chemically talented, often containing high levels of polyhalogenated compounds, terpenoids, peptides, and other classes of bioactive small molecules. This group of tropical sponges hosts a high abundance of an uncultured filamentous cyanobacterium, Hormoscilla spongeliae Here, we report the comparative genomic analyses of two phylogenetically distinct Hormoscilla populations, which reveal shared deficiencies in essential pathways, hinting at possible reasons for their uncultivable status, as well as differing biosynthetic machinery for the production of specialized metabolites. One symbiont population contains clustered genes for expanded polybrominated diphenylether (PBDE) biosynthesis, while the other instead harbors a unique gene cluster for the biosynthesis of the dysinosin nonribosomal peptides. The hybrid sequencing and assembly approach utilized here allows, for the first time, a comprehensive look into the genomes of these elusive sponge symbionts.IMPORTANCE Natural products provide the inspiration for most clinical drugs. With the rise in antibiotic resistance, it is imperative to discover new sources of chemical diversity. Bacteria living in symbiosis with marine invertebrates have emerged as an untapped source of natural chemistry. While symbiotic bacteria are often recalcitrant to growth in the lab, advances in metagenomic sequencing and assembly now make it possible to access their genetic blueprint. A cell enrichment procedure, combined with a hybrid sequencing and assembly approach, enabled detailed genomic analysis of uncultivated cyanobacterial symbiont populations in two chemically rich tropical marine sponges. These population genomes reveal a wealth of secondary metabolism potential as well as possible reasons for historical difficulties in their cultivation.
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Affiliation(s)
- Michelle A Schorn
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
| | - Peter A Jordan
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
| | - Sheila Podell
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
| | - Jessica M Blanton
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
| | - Vinayak Agarwal
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
- School of Chemistry and Biochemistry, School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Jason S Biggs
- University of Guam Marine Laboratory, UoG Station, Mangilao, Guam, USA
| | - Eric E Allen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
- Center for Microbiome Innovation, University of California, San Diego, California, USA
- Division of Biological Sciences, University of California, San Diego, California, USA
| | - Bradley S Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, California, USA
- Center for Microbiome Innovation, University of California, San Diego, California, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, California, USA
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39
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Martinez AFC, de Almeida LG, Moraes LAB, Cônsoli FL. Microbial Diversity and Chemical Multiplicity of Culturable, Taxonomically Similar Bacterial Symbionts of the Leaf-Cutting Ant Acromyrmex coronatus. MICROBIAL ECOLOGY 2019; 77:1067-1081. [PMID: 30789995 DOI: 10.1007/s00248-019-01341-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
Insects are a highly diverse group, exploit a wide range of habitats, and harbor bacterial symbionts of largely unknown diversity. Insect-associated bacterial symbionts are underexplored but promising sources of bioactive compounds. The community of culturable bacteria associated with the leaf-cutting ant Acromyrmex coronatus (Fabricius) and the diversity of their metabolites produced were investigated. Forty-six phylotypes belonging to Actinobacteria, Firmicutes, and Proteobacteria were identified. The chemical profiles of 65 isolates were further analyzed by LC-MS/MS, and principal components analysis (PCA) was used to group the isolates according to their chemical profiles. Historically, selection of bacterial strains for drug discovery has been based on phenotypic and/or genotypic traits. Use of such traits may well impede the discovery of new compounds; in this study, several indistinguishable phylotypes cultured in identical nutritional and environmental conditions produced completely different chemical profiles. Our data also demonstrated the wide chemical diversity to be explored in insect-associated symbionts.
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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, Piracicaba, SP, 13418-900, 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, Piracicaba, SP, 13418-900, 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 dos Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, 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, Piracicaba, SP, 13418-900, Brazil.
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40
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Hong SH, Ban YH, Byun WS, Kim D, Jang YJ, An JS, Shin B, Lee SK, Shin J, Yoon YJ, Oh DC. Camporidines A and B: Antimetastatic and Anti-inflammatory Polyketide Alkaloids from a Gut Bacterium of Camponotus kiusiuensis. JOURNAL OF NATURAL PRODUCTS 2019; 82:903-910. [PMID: 30912943 DOI: 10.1021/acs.jnatprod.8b01000] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chemical studies of gut bacteria of the carpenter ant Camponotus kiusiuensis led to the discovery of two new alkaloids, camporidines A and B (1 and 2), from Streptomyces sp. STA1. The structures of 1 and 2 were established as new polyketide alkaloids bearing a piperidine-cyclopentene-epoxide 6/5/3 tricyclic system based on NMR spectroscopic and mass spectrometric analysis. The relative configurations of the camporidines were determined by their 1H-1H NOESY/ROESY and 1D NOE NMR correlations. The experimental ECD spectra of 1 and 2 were compared with their calculated ECD spectra to assign their absolute configurations. Camporidine A (1) displayed antimetastatic activity by suppression of cell invasion against the metastatic breast cancer cell line MDA-MB-231 and showed an anti-inflammatory effect by suppressing nitric oxide production induced by lipopolysaccharide. In addition, the putative biosynthetic gene cluster of the camporidines was identified, and the biosynthetic pathway of the camporidines was proposed based on bioinformatic analysis of the full genome of Streptomyces sp. STA1. Camporidines A and B (1 and 2) could be biosynthesized by a modular type I PKS containing an acyl transferase domain that accepts an unusual extender unit, which becomes the (C1'-C6') hexyl side chain. The post-PKS modification enzymes were predicted to perform an amination and an oxidation along with spontaneous Schiff base formation and generate the unique piperidine-cyclopentene-epoxide 6/5/3 tricyclic framework.
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Affiliation(s)
- Seong-Heon Hong
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Yeon Hee Ban
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Woong Sub Byun
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Donghwa Kim
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Yong-Joon Jang
- Natura Academia Research Center , Seoul 08826 , Republic of Korea
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Bora Shin
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Yeo Joon Yoon
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
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41
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Yoon SY, Lee SR, Hwang JY, Benndorf R, Beemelmanns C, Chung SJ, Kim KH. Fridamycin A, a Microbial Natural Product, Stimulates Glucose Uptake without Inducing Adipogenesis. Nutrients 2019; 11:nu11040765. [PMID: 30939853 PMCID: PMC6520714 DOI: 10.3390/nu11040765] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 03/27/2019] [Accepted: 03/27/2019] [Indexed: 12/25/2022] Open
Abstract
Type 2 diabetes is a complex, heterogeneous, and polygenic disease. Currently, available drugs for treating type 2 diabetes predominantly include sulfonylureas, α-glucosidase inhibitors, and biguanides. However, long-term treatment with these therapeutic drugs is often accompanied by undesirable side effects, which have driven interest in the development of more effective and safer antidiabetic agents. To address the urgent need for new chemical solutions, we focused on the analysis of structurally novel and/or biologically new metabolites produced by insect-associated microbes as they have recently been recognized as a rich source of natural products. Comparative LC/MS-based analysis of Actinomadura sp. RB99, isolated from a fungus-growing termite, led to the identification of the type II polyketide synthase-derived fridamycin A. The structure of fridamycin A was confirmed by ¹H NMR data and LC/MS analysis. The natural microbial product, fridamycin A, was examined for its antidiabetic properties in 3T3-L1 adipocytes, which demonstrated that fridamycin A induced glucose uptake in 3T3-L1 cells by activating the AMP-activated protein kinase (AMPK) signaling pathway but did not affect adipocyte differentiation, suggesting that the glucose uptake took place through activation of the AMPK signaling pathway without inducing adipogenesis. Our results suggest that fridamycin A has potential to induce fewer side effects such as weight gain compared to rosiglitazone, a commonly used antidiabetic drug, and that fridamycin A could be a novel potential therapeutic candidate for the management of type 2 diabetes.
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Affiliation(s)
- Sun-Young Yoon
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Seoung Rak Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Ji Young Hwang
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - René Benndorf
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany.
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute, Beutenbergstraße 11a, 07745 Jena, Germany.
| | - Sang J Chung
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
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42
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Hsiao CC, Sieber S, Georgiou A, Bailly A, Emmanouilidou D, Carlier A, Eberl L, Gademann K. Synthesis and Biological Evaluation of the Novel Growth Inhibitor Streptol Glucoside, Isolated from an Obligate Plant Symbiont. Chemistry 2019; 25:1722-1726. [PMID: 30508325 DOI: 10.1002/chem.201805693] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 11/29/2018] [Indexed: 12/23/2022]
Abstract
The plant Psychotria kirkii hosts an obligatory bacterial symbiont, Candidatus Burkholderia kirkii, in nodules on their leaves. Recently, a glucosylated derivative of (+)-streptol, (+)-streptol glucoside, was isolated from the nodulated leaves and was found to possess a plant growth inhibitory activity. To establish a structure-activity relationship study, a convergent strategy was developed to obtain several pseudosugars from a single synthetic precursor. Furthermore, the glucosylation of streptol was investigated in detail and conditions affording specifically the α or β glucosidic anomer were identified. Although (+)-streptol was the most active compound, its concentration in P. kirkii plant leaves extract was approximately ten-fold lower than that of (+)-streptol glucoside. These results provide compelling evidence that the glucosylation of (+)-streptol protects the plant host against the growth inhibitory effect of the compound, which might constitute a molecular cornerstone for this successful plant-bacteria symbiosis.
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Affiliation(s)
- Chien-Chi Hsiao
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Simon Sieber
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Antri Georgiou
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland
| | - Aurélien Bailly
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland
| | - Despina Emmanouilidou
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Aurélien Carlier
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland
| | - Leo Eberl
- Institute of Plant and Microbial Biology, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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43
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Guchhait S, Goswami RK. Studies toward the synthesis of macrotermycin C: stereoselective construction of the acyclic skeleton of the aglycon. Org Biomol Chem 2019; 17:9502-9509. [DOI: 10.1039/c9ob01999e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first asymmetric synthesis of the acyclic skeleton of the aglycon of macrotermycin C has been achieved in 17 linear steps with 5.7% overall yield following a convergent approach.
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Affiliation(s)
- Sandip Guchhait
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Rajib Kumar Goswami
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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44
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Lee SR, Song JH, Song JH, Ko HJ, Baek JY, Trinh TA, Beemelmanns C, Yamabe N, Kim KH. Chemical Identification of Isoflavonoids from a Termite-Associated Streptomyces sp. RB1 and Their Neuroprotective Effects in Murine Hippocampal HT22 Cell Line. Int J Mol Sci 2018; 19:ijms19092640. [PMID: 30200599 PMCID: PMC6164413 DOI: 10.3390/ijms19092640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 08/25/2018] [Accepted: 08/31/2018] [Indexed: 12/13/2022] Open
Abstract
Insect-associated bacteria have been recognized as a very promising natural resource for discovering bioactive secondary metabolites with diverse pharmacological effects. One new isoflavonoid glycoside, termisoflavone D (1), together with seven known isoflavonoids (2–8), were identified from MeOH extracts of the fungus-growing termite-associated Streptomyces sp. RB1. The chemical structure of the new compound 1 was elucidated using comprehensive spectroscopic methods including 1D and 2D NMR, along with LC/MS analysis. The existence of two rhamnose moieties in 1 was determined with comparative NMR analysis, and the absolute configuration was elucidated using chemical reactions. The neuroprotective activities of compounds 1–8 were thoroughly investigated using the murine hippocampal HT22 cell line. Compound 5 prevented glutamate-induced HT22 cell death by blocking intracellular reactive oxygen species (ROS) accumulation. The present study provides the first experimental evidence for the potential use of isoflavonoids from termite-associated bacteria as lead compounds that can prevent neuronal damage induced by glutamate.
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Affiliation(s)
- Seoung Rak Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Ji Hoon Song
- College of Medicine, University of Ulsan, Seoul 05505, Korea.
| | - Jae-Hyoung Song
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Korea.
| | - Hyun-Jeong Ko
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Korea.
| | - Ji Yun Baek
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Tuy An Trinh
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans Knöll Institute (HKI), Beutenbergstrasse 11a, 07745 Jena, Germany.
| | - Noriko Yamabe
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
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45
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46
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Flórez LV, Scherlach K, Miller IJ, Rodrigues A, Kwan JC, Hertweck C, Kaltenpoth M. An antifungal polyketide associated with horizontally acquired genes supports symbiont-mediated defense in Lagria villosa beetles. Nat Commun 2018; 9:2478. [PMID: 29946103 PMCID: PMC6018673 DOI: 10.1038/s41467-018-04955-6] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 06/05/2018] [Indexed: 12/13/2022] Open
Abstract
Microbial symbionts are often a source of chemical novelty and can contribute to host defense against antagonists. However, the ecological relevance of chemical mediators remains unclear for most systems. Lagria beetles live in symbiosis with multiple strains of Burkholderia bacteria that protect their offspring against pathogens. Here, we describe the antifungal polyketide lagriamide, and provide evidence supporting that it is produced by an uncultured symbiont, Burkholderia gladioli Lv-StB, which is dominant in field-collected Lagria villosa. Interestingly, lagriamide is structurally similar to bistramides, defensive compounds found in marine tunicates. We identify a gene cluster that is probably involved in lagriamide biosynthesis, provide evidence for horizontal acquisition of these genes, and show that the naturally occurring symbiont strains on the egg are protective in the soil environment. Our findings highlight the potential of microbial symbionts and horizontal gene transfer as influential sources of ecological innovation.
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Affiliation(s)
- Laura V Flórez
- Department for Evolutionary Ecology, Institute of Organismic and Molecular Evolution, Johannes Gutenberg University, Johann-Joachim-Becher-Weg 13, 55128, Mainz, Germany.
| | - Kirstin Scherlach
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Products Research and Infection Biology, HKI, Beutenbergstr. 11a, 07745, Jena, Germany.
| | - Ian J Miller
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, 777 Highland Ave, Madison, WI, 53705-2222, USA
| | - Andre Rodrigues
- Department of Biochemistry and Microbiology, UNESP-São Paulo State University, Av. 24A, n. 1515-Bela Vista, Rio Claro, SP, 13506-900, Brazil
| | - Jason C Kwan
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, 777 Highland Ave, Madison, WI, 53705-2222, USA
| | - Christian Hertweck
- Department of Biomolecular Chemistry, Leibniz Institute for Natural Products Research and Infection Biology, HKI, Beutenbergstr. 11a, 07745, Jena, Germany
- Natural Product Chemistry, Friedrich Schiller University, 07743, Jena, Germany
| | - Martin Kaltenpoth
- Department for Evolutionary Ecology, Institute of Organismic and Molecular Evolution, Johannes Gutenberg University, Johann-Joachim-Becher-Weg 13, 55128, Mainz, Germany
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Touré S, Barthélémy M, Sorres J, Genta-Jouve G, Dusfour I, Eparvier V, Stien D. Mucorolactone, a Macrolactone from Mucor sp. SNB-VECD13A, a Fungus Isolated from the Cuticle of a Vespidae Species. Org Lett 2018; 20:3780-3783. [PMID: 29923409 DOI: 10.1021/acs.orglett.8b01367] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The newly discovered macrolactone, mucorolactone, along with eight known compounds, was isolated from an ethyl acetate extract of the insect-borne fungus Mucor sp. All structures were elucidated using 1D and 2D NMR and MS spectroscopic experiments. Relative and absolute configurations of the original skeleton of mucorolactone was deduced from NOESY experiments, from the 13C NMR chemical shift calculation based on the DP4 probability method, and from the comparison of experimental and calculated electronic circular dichroism spectra.
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Affiliation(s)
- Seindé Touré
- CNRS, Institut de Chimie des Substances Naturelles (ICSN), UPR2301, Université Paris-Sud , 1 avenue de la terrasse , 91198 Gif-sur-Yvette , France
| | - Morgane Barthélémy
- CNRS, Institut de Chimie des Substances Naturelles (ICSN), UPR2301, Université Paris-Sud , 1 avenue de la terrasse , 91198 Gif-sur-Yvette , France
| | - Jonathan Sorres
- CNRS, Institut de Chimie des Substances Naturelles (ICSN), UPR2301, Université Paris-Sud , 1 avenue de la terrasse , 91198 Gif-sur-Yvette , France
| | - Grégory Genta-Jouve
- C-TAC, UMR 8638 CNRS, Faculté de Pharmacie de Paris , Université Paris Descartes , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , 75006 Paris , France
| | - Isabelle Dusfour
- Institut Pasteur de la Guyane (IPG), Unité de Contrôle et Adaptation des Vecteurs, 97306 Cayenne , French Guiana
| | - Véronique Eparvier
- CNRS, Institut de Chimie des Substances Naturelles (ICSN), UPR2301, Université Paris-Sud , 1 avenue de la terrasse , 91198 Gif-sur-Yvette , France
| | - Didier Stien
- Sorbonne Université , CNRS, Laboratoire de Biodiversité et Biotechnologie Microbienne, USR3579, Observatoire Océanologique, 66650 Banyuls-sur-mer , France
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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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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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