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Liu Z, Liu G, Guo X, Li Y, Ji N, Xu X, Sun Q, Yang J. Diversity of the protease-producing bacteria and their extracellular protease in the coastal mudflat of Jiaozhou Bay, China: in response to clam naturally growing and aquaculture. Front Microbiol 2023; 14:1164937. [PMID: 37275176 PMCID: PMC10236810 DOI: 10.3389/fmicb.2023.1164937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 04/24/2023] [Indexed: 06/07/2023] Open
Abstract
The booming mudflat aquaculture poses an accumulation of organic matter and a certain environmental threat. Protease-producing bacteria are key players in regulating the nitrogen content in ecosystems. However, knowledge of the diversity of protease-producing bacteria in coastal mudflats is limited. This study investigated the bacterial diversity in the coastal mudflat, especially protease-producing bacteria and their extracellular proteases, by using culture-independent methods and culture-dependent methods. The clam aquaculture area exhibited a higher concentration of carbon, nitrogen, and phosphorus when compared with the non-clam area, and a lower richness and diversity of bacterial community when compared with the clam naturally growing area. The major classes in the coastal mud samples were Bacteroidia, Gammaproteobacteria, and Alphaproteobacteria. The Bacillus-like bacterial community was the dominant cultivated protease-producing group, accounting for 52.94% in the non-clam area, 30.77% in the clam naturally growing area, and 50% in the clam aquaculture area, respectively. Additionally, serine protease and metalloprotease were the principal extracellular protease of the isolated coastal bacteria. These findings shed light on the understanding of the microbes involved in organic nitrogen degradation in coastal mudflats and lays a foundation for the development of novel protease-producing bacterial agents for coastal mudflat purification.
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Affiliation(s)
- Zhiyun Liu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Guangchao Liu
- College of Life Science, Qingdao Agricultural University, Qingdao, China
| | - Xuzhen Guo
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Yang Li
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Qingdao Special Food Research Institute, Qingdao, China
| | - Na Ji
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Qingdao Special Food Research Institute, Qingdao, China
| | - Xingfeng Xu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Qingdao Special Food Research Institute, Qingdao, China
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Qingdao Special Food Research Institute, Qingdao, China
| | - Jie Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Qingdao Special Food Research Institute, Qingdao, China
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2
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Rischer M, Guo H, Beemelmanns C. Signalling molecules inducing metamorphosis in marine organisms. Nat Prod Rep 2022; 39:1833-1855. [PMID: 35822257 DOI: 10.1039/d1np00073j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: findings from early 1980s until early 2022Microbial-derived cues of marine biofilms induce settlement and metamorphosis of marine organisms, a process responsible for the emergence of diverse flora and fauna in marine habitats. Although this phenomenon is known for more than 80 years, the research field has only recently gained much momentum. Here, we summarize the currently existing biochemical and microbial knowledge about microbial signalling molecules, con-specific signals, and synthetic compounds that induce or prevent recruitment, settlement, and metamorphosis in invertebrate larvae. We discuss the possible modes of action and conclude with perspectives for future research directions in the field of marine chemical ecology.
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Affiliation(s)
- Maja Rischer
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Beutenbergstraße 11a, Jena, 07745, Germany.
| | - Huijuan Guo
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Beutenbergstraße 11a, Jena, 07745, Germany.
| | - Christine Beemelmanns
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Beutenbergstraße 11a, Jena, 07745, Germany. .,Biochemistry of Microbial Metabolism, Institute of Biochemistry, Leipzig University, Johannisallee 21-23, Leipzig 04103, Germany
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Lim SJ, Min DJ, Kim S, Lee J, Lee ES, Kim H, Cho SY, Beak HS, Lee CS, Nam SJ, Ko J. Pseudoalteromone A, a Ubiquinone Derivative from Marine Pseudoalteromonas spp., Suppresses Melanogenesis. Mar Drugs 2021; 19:612. [PMID: 34822483 PMCID: PMC8618130 DOI: 10.3390/md19110612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 02/08/2023] Open
Abstract
An ubiquinone derivative, pseudoalteromone A (1), has been isolated from two marine-derived Pseudoalteromonas spp., APmarine002 and ROA-050, and its anti-melanogenesis activity was investigated. The anti-melanogenic capacity of pseudoalteromone A was demonstrated by assessing the intracellular and extracellular melanin content and cellular tyrosinase activity in the B16 cell line, Melan-a mouse melanocyte cell line, and MNT-1 human malignant melanoma cell line. Treatment with pseudoalteromone A (40 μg/mL) for 72 h reduced α-melanocyte-stimulating hormone (α-MSH)-induced intracellular melanin production by up to 44.68% in B16 cells and 38.24% in MNT-1 cells. Notably, pseudoalteromone A induced a concentration-dependent reduction in cellular tyrosinase activity in B16 cell, and Western blot analyses showed that this inhibitory activity was associated with a significant decrease in protein levels of tyrosinase and tyrosinase-related protein 1 (Tyrp-1), suggesting that pseudoalteromone A exerts its anti-melanogenesis activity through effects on melanogenic genes. We further evaluated the skin-whitening effect of pseudoalteromone A in the three-dimensional (3D) pigmented-epidermis model, MelanoDerm, and visualized the 3D distribution of melanin by two-photon excited fluorescence imaging in this human skin equivalent. Collectively, our findings suggest that pseudoalteromone A inhibits tyrosinase activity and expression and that this accounts for its anti-melanogenic effects in melanocytes.
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Affiliation(s)
- Su-Jin Lim
- Department of Beauty and Cosmetic Science, Eulji University, Seongnam 13135, Korea;
| | - Dae-jin Min
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
| | - Sohee Kim
- The Graduate School of Industrial Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul 03760, Korea;
| | - Jihye Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea;
- Laboratories of Marine New Drugs, REDONE Seoul, Seoul 08594, Korea
| | - Eun-Soo Lee
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
| | - Hyuk Kim
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
| | - Sung-Yoen Cho
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
| | - Heung-Soo Beak
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
| | - Chang-Seok Lee
- Department of Beauty and Cosmetic Science, Eulji University, Seongnam 13135, Korea;
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea;
| | - Jaeyoung Ko
- Basic Research & Innovation Division, Amorepacific R&D Unit, Yongin 17074, Korea; (D.-j.M.); (E.-S.L.); (H.K.); (S.-Y.C.); (H.-S.B.)
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4
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Cavalcanti GS, Alker AT, Delherbe N, Malter KE, Shikuma NJ. The Influence of Bacteria on Animal Metamorphosis. Annu Rev Microbiol 2021; 74:137-158. [PMID: 32905754 DOI: 10.1146/annurev-micro-011320-012753] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The swimming larvae of many marine animals identify a location on the seafloor to settle and undergo metamorphosis based on the presence of specific surface-bound bacteria. While bacteria-stimulated metamorphosis underpins processes such as the fouling of ship hulls, animal development in aquaculture, and the recruitment of new animals to coral reef ecosystems, little is known about the mechanisms governing this microbe-animal interaction. Here we review what is known and what we hope to learn about how bacteria and the factors they produce stimulate animal metamorphosis. With a few emerging model systems, including the tubeworm Hydroides elegans, corals, and the hydrozoan Hydractinia, we have begun to identify bacterial cues that stimulate animal metamorphosis and test hypotheses addressing their mechanisms of action. By understanding the mechanisms by which bacteria promote animal metamorphosis, we begin to illustrate how, and explore why, the developmental decision of metamorphosis relies on cues from environmental bacteria.
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Affiliation(s)
- Giselle S Cavalcanti
- Viral Information Institute and Department of Biology, San Diego State University, San Diego, California 92182, USA; , , , ,
| | - Amanda T Alker
- Viral Information Institute and Department of Biology, San Diego State University, San Diego, California 92182, USA; , , , ,
| | - Nathalie Delherbe
- Viral Information Institute and Department of Biology, San Diego State University, San Diego, California 92182, USA; , , , ,
| | - Kyle E Malter
- Viral Information Institute and Department of Biology, San Diego State University, San Diego, California 92182, USA; , , , ,
| | - Nicholas J Shikuma
- Viral Information Institute and Department of Biology, San Diego State University, San Diego, California 92182, USA; , , , ,
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Guo H, Rischer M, Westermann M, Beemelmanns C. Two Distinct Bacterial Biofilm Components Trigger Metamorphosis in the Colonial Hydrozoan Hydractinia echinata. mBio 2021; 12:e0040121. [PMID: 34154406 PMCID: PMC8262903 DOI: 10.1128/mbio.00401-21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/13/2021] [Indexed: 12/28/2022] Open
Abstract
In marine environments, the bacterially induced metamorphosis of larvae is a widespread cross-kingdom communication phenomenon that is critical for the persistence of many marine invertebrates. However, the majority of inducing bacterial signals and underlying cellular mechanisms remain enigmatic. The marine hydroid Hydractinia echinata is a well-known model system for investigating bacterially stimulated larval metamorphosis, as larvae transform into the colonial adult stage within 24 h of signal detection. Although H. echinata has served as a cell biological model system for decades, the identity and influence of bacterial signals on the morphogenic transition remained largely unexplored. Using a bioassay-guided analysis, we first determined that specific bacterial (lyso)phospholipids, naturally present in bacterial membranes and vesicles, elicit metamorphosis in Hydractinia larvae in a dose-response manner. Lysophospholipids, as single compounds or in combination (50 μM), induced metamorphosis in up to 50% of all larvae within 48 h. Using fluorescence-labeled bacterial phospholipids, we demonstrated that phospholipids are incorporated into the larval membranes, where interactions with internal signaling cascades are proposed to occur. Second, we identified two structurally distinct exopolysaccharides of bacterial biofilms, the new Rha-Man polysaccharide from Pseudoalteromonas sp. strain P1-9 and curdlan from Alcaligenes faecalis, to induce metamorphosis in up to 75% of tested larvae. We also found that combinations of (lyso)phospholipids and curdlan induced transformation within 24 h, thereby exceeding the morphogenic activity observed for single compounds and bacterial biofilms. Our results demonstrate that two structurally distinct, bacterium-derived metabolites converge to induce high transformation rates of Hydractinia larvae and thus may help ensure optimal habitat selection. IMPORTANCE Bacterial biofilms profoundly influence the recruitment and settlement of marine invertebrates, critical steps for diverse marine processes such as the formation of coral reefs, the maintenance of marine fisheries, and the fouling of submerged surfaces. However, the complex composition of biofilms often makes the characterization of individual signals and regulatory mechanisms challenging. Developing tractable model systems to characterize these coevolved interactions is the key to understanding fundamental processes in evolutionary biology. Here, we characterized two types of bacterial signaling molecules, phospholipids and polysaccharides, that induce the morphogenic transition. We then analyzed their abundance and combinatorial activity. This study highlights the general importance of multiple bacterial signal converging activity in development-related cross-kingdom signaling and poses the question of whether complex lipids and polysaccharides are general metamorphic cues for cnidarian larvae.
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Affiliation(s)
- Huijuan Guo
- Leibniz Institute for Natural Product Research and Infection Biology—Hans Knöll Institute, Jena, Germany
| | - Maja Rischer
- Leibniz Institute for Natural Product Research and Infection Biology—Hans Knöll Institute, Jena, Germany
| | - Martin Westermann
- Electron Microscopy Centre, Friedrich Schiller University Jena, Jena, Germany
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology—Hans Knöll Institute, Jena, Germany
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6
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Cheng MJ, Wu MD, Chen JJ, Chen CY, Aung T, Wu HC, Hsun-Hsuo-Chang, Lai MH. Compounds from Monascus sanguineus. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03410-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Alker AT, Delherbe N, Purdy TN, Moore BS, Shikuma NJ. Genetic examination of the marine bacterium Pseudoalteromonas luteoviolacea and effects of its metamorphosis-inducing factors. Environ Microbiol 2020; 22:4689-4701. [PMID: 32840026 PMCID: PMC8214333 DOI: 10.1111/1462-2920.15211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/14/2020] [Accepted: 08/22/2020] [Indexed: 12/13/2022]
Abstract
Pseudoalteromonas luteoviolacea is a globally distributed marine bacterium that stimulates the metamorphosis of marine animal larvae, an important bacteria-animal interaction that can promote the recruitment of animals to benthic ecosystems. Recently, different P. luteoviolacea isolates have been shown to produce two stimulatory factors that can induce tubeworm and coral metamorphosis; Metamorphosis-Associated Contractile structures (MACs) and tetrabromopyrrole (TBP) respectively. However, it remains unclear what proportion of P. luteoviolacea isolates possess the genes encoding MACs, and what phenotypic effect MACs and TBP have on other larval species. Here, we show that 9 of 19 sequenced P. luteoviolacea genomes genetically encode both MACs and TBP. While P. luteoviolacea biofilms producing MACs stimulate the metamorphosis of the tubeworm Hydroides elegans, TBP biosynthesis genes had no effect under the conditions tested. Although MACs are lethal to larvae of the cnidarian Hydractinia symbiologicarpus, P. luteoviolacea mutants unable to produce MACs are capable of stimulating metamorphosis. Our findings reveal a hidden complexity of interactions between a single bacterial species, the factors it produces and two species of larvae belonging to different phyla.
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Affiliation(s)
- Amanda T. Alker
- Department of Biology and Viral Information Institute, San Diego State University, San Diego, CA, 92182
| | - Nathalie Delherbe
- Department of Biology and Viral Information Institute, San Diego State University, San Diego, CA, 92182
| | - Trevor N. Purdy
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, 92093
| | - Bradley S. Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, 92093
| | - Nicholas J. Shikuma
- Department of Biology and Viral Information Institute, San Diego State University, San Diego, CA, 92182
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8
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Molecular Network and Culture Media Variation Reveal a Complex Metabolic Profile in Pantoea cf. eucrina D2 Associated with an Acidified Marine Sponge. Int J Mol Sci 2020; 21:ijms21176307. [PMID: 32878176 PMCID: PMC7504411 DOI: 10.3390/ijms21176307] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 01/07/2023] Open
Abstract
The Gram-negative Pantoea eucrina D2 was isolated from the marine sponge Chondrosia reniformis. Sponges were collected in a shallow volcanic vents system in Ischia island (South Italy), influenced by CO2 emissions and lowered pH. The chemical diversity of the secondary metabolites produced by this strain, under different culture conditions, was explored by a combined approach including molecular networking, pure compound isolation and NMR spectroscopy. The metabolome of Pantoea cf. eucrina D2 yielded a very complex molecular network, allowing the annotation of several metabolites, among them two biosurfactant clusters: lipoamino acids and surfactins. The production of each class of metabolites was highly dependent on the culture conditions, in particular, the production of unusual surfactins derivatives was reported for the first time from this genus; interestingly the production of these metabolites only arises by utilizing inorganic nitrogen as a sole nitrogen source. Major components of the extract obtained under standard medium culture conditions were isolated and identified as N-lipoamino acids by a combination of 1D and 2D NMR spectroscopy and HRESI-MS analysis. Assessment of the antimicrobial activity of the pure compounds towards some human pathogens, indicated a moderate activity of leucine containing N-lipoamino acids towards Staphylococcus aureus, Staphylococcus epidermidis and a clinical isolate of the emerging food pathogen Listeria monocytogenes.
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9
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Frank U, Nicotra ML, Schnitzler CE. The colonial cnidarian Hydractinia. EvoDevo 2020; 11:7. [PMID: 32226598 PMCID: PMC7098123 DOI: 10.1186/s13227-020-00151-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 03/12/2020] [Indexed: 11/27/2022] Open
Abstract
Hydractinia, a genus of colonial marine cnidarians, has been used as a model organism for developmental biology and comparative immunology for over a century. It was this animal where stem cells and germ cells were first studied. However, protocols for efficient genetic engineering have only recently been established by a small but interactive community of researchers. The animal grows well in the lab, spawns daily, and its relatively short life cycle allows genetic studies. The availability of genomic tools and resources opens further opportunities for research using this animal. Its accessibility to experimental manipulation, growth- and cellular-plasticity, regenerative ability, and resistance to aging and cancer place Hydractinia as an emerging model for research in many biological and environmental disciplines.
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Affiliation(s)
- Uri Frank
- 1Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Matthew L Nicotra
- 2Departments of Surgery and Immunology, Center for Evolutionary Biology and Medicine, Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA 15261 USA
| | - Christine E Schnitzler
- 3Whitney Laboratory for Marine Bioscience, University of Florida, St. Augustine, FL 320803 USA.,4Department of Biology, University of Florida, Gainesville, FL 32611 USA
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Rischer M, Lee SR, Eom HJ, Park HB, Vollmers J, Kaster AK, Shin YH, Oh DC, Kim KH, Beemelmanns C. Spirocyclic cladosporicin A and cladosporiumins I and J from a Hydractinia-associated Cladosporium sphaerospermum SW67. Org Chem Front 2019. [DOI: 10.1039/c8qo01104d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The identification of three new spirocyclic natural products named cladosporicin A, cladosporiumins I and J from the fungus Cladosporium sphaerospermum SW67 is reported.
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Affiliation(s)
- Maja Rischer
- Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute
- 07745 Jena
- Germany
| | - Seoung Rak Lee
- School of Pharmacy
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | - Hee Jeong Eom
- School of Pharmacy
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | | | - John Vollmers
- Karlsruhe Institute of Technology
- Institute for Biological Interfaces (IBG 5)
- Germany
| | - Anne-Kristin Kaster
- Karlsruhe Institute of Technology
- Institute for Biological Interfaces (IBG 5)
- Germany
| | - Yern-Hyerk Shin
- 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
| | - Ki Hyun Kim
- School of Pharmacy
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute
- 07745 Jena
- Germany
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11
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Bruns H, Ziesche L, Taniwal NK, Wolter L, Brinkhoff T, Herrmann J, Müller R, Schulz S. N-Acylated amino acid methyl esters from marine Roseobacter group bacteria. Beilstein J Org Chem 2018; 14:2964-2973. [PMID: 30591820 PMCID: PMC6296433 DOI: 10.3762/bjoc.14.276] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/15/2018] [Indexed: 01/13/2023] Open
Abstract
Bacteria of the Roseobacter group (Rhodobacteraceae) are important members of many marine ecosystems. Similar to other Gram-negative bacteria many roseobacters produce N-acylhomoserine lactones (AHLs) for communication by quorum sensing systems. AHLs regulate different traits like cell differentiation or antibiotic production. Related N-acylalanine methyl esters (NAMEs) have been reported as well, but so far only from Roseovarius tolerans EL-164. While screening various roseobacters isolated from macroalgae we encountered four strains, Roseovarius sp. D12_1.68, Loktanella sp. F13, F14 and D3 that produced new derivatives and analogs of NAMEs, namely N-acyl-2-aminobutyric acid methyl esters (NABME), N-acylglycine methyl esters (NAGME), N-acylvaline methyl esters (NAVME), as well as for the first time a methyl-branched NAME, N-(13-methyltetradecanoyl)alanine methyl ester. These compounds were detected by GC–MS analysis, and structural proposals were derived from the mass spectra and by derivatization. Verification of compound structures was performed by synthesis. NABMEs, NAVMEs and NAGMEs are produced in low amounts only, making mass spectrometry the method of choice for their detection. The analysis of both EI and ESI mass spectra revealed fragmentation patterns helpful for the detection of similar compounds derived from other amino acids. Some of these compounds showed antimicrobial activity. The structural similarity of N-acylated amino acid methyl esters and similar lipophilicity to AHLs might indicate a yet unknown function as signalling compounds in the ecology of these bacteria, although their singular occurrence is in strong contrast to the common occurrence of AHLs. Obviously the structural motif is not restricted to Roseovarius spp. and occurs also in other genera.
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Affiliation(s)
- Hilke Bruns
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Lisa Ziesche
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Nargis Khakin Taniwal
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Laura Wolter
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111 Oldenburg, Germany
| | - Thorsten Brinkhoff
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26111 Oldenburg, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University, Campus E8.1, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University, Campus E8.1, 66123 Saarbrücken, Germany
| | - Stefan Schulz
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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12
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Role of Chemical Mediators in Aquatic Interactions across the Prokaryote-Eukaryote Boundary. J Chem Ecol 2018; 44:1008-1021. [PMID: 30105643 DOI: 10.1007/s10886-018-1004-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 07/24/2018] [Accepted: 07/30/2018] [Indexed: 10/28/2022]
Abstract
There is worldwide growing interest in the occurrence and diversity of metabolites used as chemical mediators in cross-kingdom interactions within aquatic systems. Bacteria produce metabolites to protect and influence the growth and life cycle of their eukaryotic hosts. In turn, the host provides a nutrient-enriched environment for the bacteria. Here, we discuss the role of waterborne chemical mediators that are responsible for such interactions in aquatic multi-partner systems, including algae or invertebrates and their associated bacteria. In particular, this review highlights recent advances in the chemical ecology of aquatic systems that support the overall ecological significance of signaling molecules across the prokaryote-eukaryote boundary (cross-kingdom interactions) for growth, development and morphogenesis of the host. We emphasize the value of establishing well-characterized model systems that provide the basis for the development of ecological principles that represent the natural lifestyle and dynamics of aquatic microbial communities and enable a better understanding of the consequences of environmental change and the most effective means of managing community interactions.
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13
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Son S, Kim E, Kim JW, Ko SK, Lee B, Lee JS, Hong YS, Jang JH, Ahn JS. Isolation and Structure Determination of a New Lumichrome Glycoside Isolated from a Soil Streptomyces sp. KCB16C001. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Microbial studies of soil samples collected at Ochang, Korea led to the isolation of the actinobacterium Streptomyces sp. KCB16C001. Subsequent LC/MS analysis of the culture extract for dereplication purposes enabled the identification of a new metabolite ochangoside (1), whose chemical structure was determined to be 1-( α -L-rhamnosyl)-lumichrome by scale-up purification and structure elucidation procedures based mainly on NMR and MS spectroscopic data. Determination of the stereochemistry of the sugar moiety was achieved by LC/MS analysis of the sugar derivatized with L-cysteine methyl ester and o -tolyl isothiocyanate. Our results represent a rare example of natural lumichrome glycoside with a sugar unit attached at N −1.
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Affiliation(s)
- Sangkeun Son
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | - Eun Kim
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jong Won Kim
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | - Sung-Kyun Ko
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Byeongsan Lee
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | - Jung-Sook Lee
- Korean Collection for Type Cultures, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 56212, Republic of Korea
| | - Young-Soo Hong
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jae-Hyuk Jang
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jong Seog Ahn
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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