1
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Chen M, Xu C, Wang X, Wu Y, Li L. Nonribosomal peptide synthetases and nonribosomal cyanopeptides synthesis in Microcystis: A comparative genomics study. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Liu T, Gu Y, Zhou Z, Liu Z, Yin H, Qin C, Yi T, Tao J. Ecological strategies of biological and chemical control agents on wildfire disease of tobacco (Nicotiana tabacum L.). BMC Microbiol 2021; 21:184. [PMID: 34139992 PMCID: PMC8212473 DOI: 10.1186/s12866-021-02237-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 04/19/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND To investigate the ecological effects of chemical and biological control methods on tobacco wildfire disease, a plot field experiment was conducted to compare the control efficiency and mechanisms of a chemical pesticide (kasugamycin wettable powder, KWP) and a biological control agent (BCA) through high-throughput sequencing of bacterial 16S rRNA genes. RESULTS The results showed that the BCA displayed better performance in decreasing the disease index and morbidity of tobacco than the chemical pesticide. By monitoring the endophytic community within tobacco leaves, it was found that the control effects of these two methods might be mediated by different changes in the endophytic bacterial communities and community assembly patterns. The application of either method decreased the taxonomic diversity of the leaf endophytic community. Compared to the BCA, KWP showed a more significant effect on the endophytic community structure, while the endophytic community treated with the BCA was able to return to the original state, which presented much lower disease infection. The disease control efficiency of KWP and BCA treatments might be achieved by increasing the abundance of Sphingomonas and Streptophyta, respectively. Furthermore, an analysis of the ecological processes in community assembly indicated that the BCA strengthened the homogeneous and variable selection, while KWP enhanced ecological drift. CONCLUSIONS The results suggested different control mechanisms between KWP and BCA treatments, which will help in developing diverse ecological strategies for plant disease control.
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Affiliation(s)
- Tianbo Liu
- College of Plant Protection, Hunan Agricultural University, Changsha, China
- Central South Agricultural Experiment Station of China Tobacco, Changsha, China
| | - Yabing Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
| | - Zhicheng Zhou
- Central South Agricultural Experiment Station of China Tobacco, Changsha, China
| | - Zhenghua Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
| | - Chong Qin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
| | - Tuyong Yi
- College of Plant Protection, Hunan Agricultural University, Changsha, China.
| | - Jiemeng Tao
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China.
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3
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Comparative characterization of two cyanobacteria strains of the order Spirulinales isolated from the Baltic Sea - polyphasic approach in practice. ALGAL RES 2021. [DOI: 10.1016/j.algal.2020.102170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Ertekin E, Meslier V, Browning A, Treadgold J, DiRuggiero J. Rock structure drives the taxonomic and functional diversity of endolithic microbial communities in extreme environments. Environ Microbiol 2020; 23:3937-3956. [PMID: 33078515 DOI: 10.1111/1462-2920.15287] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 10/07/2020] [Accepted: 10/18/2020] [Indexed: 11/29/2022]
Abstract
Endolithic (rock-dwelling) microbial communities are ubiquitous in hyper-arid deserts around the world and the last resort for life under extreme aridity. These communities are excellent models to explore biotic and abiotic drivers of diversity because they are of low complexity. Using high-throughput amplicon and metagenome sequencing, combined with X-ray computed tomography, we investigated how water availability and substrate architecture modulated the taxonomic and functional composition of gypsum endolithic communities in the Atacama Desert, Chile. We found that communities inhabiting gypsum rocks with a more fragmented substrate architecture had higher taxonomic and functional diversity, despite having less water available. This effect was tightly linked with community connectedness and likely the result of niche differentiation. Gypsum communities were functionally similar, yet adapted to their unique micro-habitats by modulating their carbon and energy acquisition strategies and their growth modalities. Reconstructed population genomes showed that these endolithic microbial populations encoded potential pathways for anoxygenic phototrophy and atmospheric hydrogen oxidation as supplemental energy sources.
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Affiliation(s)
- Emine Ertekin
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA
| | - Victoria Meslier
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA.,MetaGenoPolis, Jouy-en-Josas, France
| | | | | | - Jocelyne DiRuggiero
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA.,Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, USA
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5
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Laszakovits JR, MacKay AA. Removal of cyanotoxins by potassium permanganate: Incorporating competition from natural water constituents. WATER RESEARCH 2019; 155:86-95. [PMID: 30831427 DOI: 10.1016/j.watres.2019.02.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 01/31/2019] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
In recent years, harmful algal blooms capable of producing toxins including microcystins, cylindrospermopsin, and saxitoxin have increased in occurrence and severity. These toxins can enter drinking water treatment plants and, if not effectively removed, pose a serious threat to human health. The work here investigated the efficacy of permanganate oxidation as a treatment strategy, with a focus on incorporating competition by cyanobacterial cells and dissolved organic matter (DOM). We report rate constants of 272 ± 23 M-1 s-1 for the reaction between permanganate and microcystin-LR, 0.26 ± 0.05 M-1 s-1 for the reaction between permanganate and cylindrospermopsin, and, using chemical analogs, estimate a maximum rate constant of 2.7 ± 0.2 M-1 s-1 for the reaction between permanganate and saxitoxin. We conclude that permanganate only shows potential to remove microcystins. No pH (6-10) or alkalinity (0-50 mM) dependence was observed for the rate of reaction between microcystin-LR and permanganate; however, a temperature dependence was observed and can be characterized by an activation energy of 16 ± 5 kJ mol-1. The competition posed by cyanobacterial cells was quantified by an apparent second order rate constant of 2.5 ± 0.3 × 10-6 L μg chl-a-1 s-1. From this apparent second order rate constant, it was concluded that cyanobacterial cells are not efficient scavengers of permanganate within typical contact times but this second order rate constant can be used to accurately predict microcystin degradation in algal-impacted waters. The competition posed by DOM depended on both the amount of DOM present (as measured by TOC) and its electron donating capacity (as predicted by SUVA-254 or E2/E3 ratio). DOM was concluded to scavenge permanganate efficiently and we forward that this should be considered in permanganate dosing calculations.
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Affiliation(s)
- Juliana R Laszakovits
- Department of Civil, Environmental, and Geodetic Engineering at The Ohio State University, USA
| | - Allison A MacKay
- Department of Civil, Environmental, and Geodetic Engineering at The Ohio State University, USA.
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6
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Janssen EML. Cyanobacterial peptides beyond microcystins - A review on co-occurrence, toxicity, and challenges for risk assessment. WATER RESEARCH 2019; 151:488-499. [PMID: 30641464 DOI: 10.1016/j.watres.2018.12.048] [Citation(s) in RCA: 185] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/18/2018] [Accepted: 12/31/2018] [Indexed: 05/28/2023]
Abstract
Cyanobacterial bloom events that produce natural toxins occur in freshwaters across the globe, yet the potential risk of many cyanobacterial metabolites remains mostly unknown. Only microcystins, one class of cyanopeptides, have been studied intensively and the wealth of evidence regarding exposure concentrations and toxicity led to their inclusion in risk management frameworks for water quality. However, cyanobacteria produce an incredible diversity of hundreds of cyanopeptides beyond the class of microcystins. The question arises, whether the other cyanopeptides are in fact of no human and ecological concern or whether these compounds merely received (too) little attention thus far. Current observations suggest that an assessment of their (eco)toxicological risk is indeed relevant: First, other cyanopeptides, including cyanopeptolins and anabaenopeptins, can occur just as frequently and at similar nanomolar concentrations as microcystins in surface waters. Second, cyanopeptolins, anabaenopeptins, aeruginosins and microginins inhibit proteases in the nanomolar range, in contrast to protein phosphatase inhibition by microcystins. Cyanopeptolins, aeruginosins, and aerucyclamide also show toxicity against grazers in the micromolar range comparable to microcystins. The key challenge for a comprehensive risk assessment of cyanopeptides remains their large structural diversity, lack of reference standards, and high analytical requirements for identification and quantification. One way forward would be a prevalence study to identify the priority candidates of tentatively abundant, persistent, and toxic cyanopeptides to make comprehensive risk assessments more manageable.
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Affiliation(s)
- Elisabeth M-L Janssen
- Swiss Federal Institute of Aquatic Science and Technology, Eawag, Dübendorf, 8600, Switzerland.
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7
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Formighieri C, Melis A. Cyanobacterial production of plant essential oils. PLANTA 2018; 248:933-946. [PMID: 29974209 DOI: 10.1007/s00425-018-2948-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/25/2018] [Indexed: 05/12/2023]
Abstract
Synechocystis (a cyanobacterium) was employed as an alternative host for the production of plant essential oil constituents. β-Phellandrene synthase (PHLS) genes from different plants, when expressed in Synechocystis, enabled synthesis of variable monoterpene hydrocarbon blends, converting Synechocystis into a cell factory that photosynthesized and released useful products. Monoterpene synthases are secondary metabolism enzymes that catalyze the generation of essential oil constituents in terrestrial plants. Essential oils, including monoterpene hydrocarbons, are of interest for their commercial application and value. Therefore, heterologous expression of monoterpene synthases for high-capacity essential oil production in photosynthetic microorganism transformants is of current interest. In the present work, the cyanobacterium Synechocystsis PCC 6803 was employed as an alternative host for the production of plant essential oil constituents. As a case study, β-phellandrene synthase (PHLS) genes from different plants were heterologously expressed in Synechocystis. Genomic integration of individual PHLS-encoding sequences endowed Synechocystis with constitutive monoterpene hydrocarbons generation, occurring concomitant with photosynthesis and cell growth. Specifically, the β-phellandrene synthase from Lavandula angustifolia (lavender), Solanum lycopersicum (tomato), Pinus banksiana (pine), Picea sitchensis (Sitka spruce) and Abies grandis (grand fir) were active in Synechocystis transformants but, instead of a single product, they generated a blend of terpene hydrocarbons comprising β-phellandrene, α-phellandrene, β-myrcene, β-pinene, and δ-carene with variable percentage ratios ranging from < 10 to > 90% in different product combinations and proportions. Our results suggested that PHLS enzyme conformation and function depends on the cytosolic environment in which they reside, with the biochemical properties of the latter causing catalytic deviations from the products naturally observed in the corresponding gene-encoding plants, giving rise to the terpene hydrocarbon blends described in this work. These findings may have commercial application in the generation of designer essential oil blends and will further assist the development of heterologous cyanobacterial platforms for the generation of desired monoterpene hydrocarbon products.
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Affiliation(s)
- Cinzia Formighieri
- Plant and Microbial Biology, University of California, Berkeley, CA, 94720-3102, USA
| | - Anastasios Melis
- Plant and Microbial Biology, University of California, Berkeley, CA, 94720-3102, USA.
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8
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May DS, Kang HS, Santarsiero BD, Krunic A, Burdette JE, Swanson SM, Orjala J. Ribocyclophanes A-E, Glycosylated Cyclophanes with Antiproliferative Activity from Two Cultured Terrestrial Cyanobacteria. JOURNAL OF NATURAL PRODUCTS 2018; 81:572-578. [PMID: 29381355 PMCID: PMC5898370 DOI: 10.1021/acs.jnatprod.7b00954] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The cell extracts of two cultured freshwater Nostoc spp., UIC 10279 and UIC 10366, both from the suburbs of Chicago, showed antiproliferative activity against MDA-MB-231 and MDA-MB-435 cancer cell lines. Bioassay-guided fractionation led to the isolation of five glycosylated cylindrocyclophanes, named ribocyclophanes A-E (1-5) and cylindrocyclophane D (6). The structure determination was carried out by HRESIMS and 1D and 2D NMR analyses and confirmed by single-crystal X-ray crystallography. The structures of ribocyclophanes A-E (1-5) contain a β-d-ribopyranose glycone in the rare 1 C4 conformation. Among isolated compounds, ribocyclophane D (4) showed antiproliferative activity against MDA-MB-435 and MDA-MB-231 cancer cells with an IC50 value of less than 1 μM.
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Affiliation(s)
- Daniel S. May
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Hahk-Soo Kang
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Bernard D. Santarsiero
- Center for Biomolecular Sciences, University of Illinois at Chicago, Chicago, IL 60607, United States
| | - Aleksej Krunic
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Joanna E. Burdette
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Steven M. Swanson
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Jimmy Orjala
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, United States
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9
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Stewart AK, Ravindra R, Van Wagoner RM, Wright JLC. Metabolomics-Guided Discovery of Microginin Peptides from Cultures of the Cyanobacterium Microcystis aeruginosa. JOURNAL OF NATURAL PRODUCTS 2018; 81:349-355. [PMID: 29405714 DOI: 10.1021/acs.jnatprod.7b00829] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report a mass-spectrometry-based metabolomics study of a laboratory-cultured strain of Microcystis aeruginosa (UTEX LB2385), which has led to the discovery of five peptides (1-5) belonging to the microginin class of linear cyanopeptides. The structures and configurations of these peptides were determined by spectroscopic analyses and chemical derivitization. The microginin peptides described herein are the first reported derivatives containing N-methyl methionine (1, 5) and N-methyl methionine sulfoxide (2-4). The two tripeptide microginin analogues (4, 5) identified represent the smallest members of this peptide family. Their angiotensin-converting enzyme (ACE) inhibitory activity was also investigated. Microginin 527 (4) was the most potent of the group, with an IC50 of 31 μM.
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Affiliation(s)
- Allison K Stewart
- Center for Marine Science, Department of Chemistry and Biochemistry, University of North Carolina Wilmington , 5600 Marvin K. Moss Lane, Wilmington, North Carolina 28409, United States
| | - Rudravajhala Ravindra
- Center for Marine Science, Department of Chemistry and Biochemistry, University of North Carolina Wilmington , 5600 Marvin K. Moss Lane, Wilmington, North Carolina 28409, United States
| | - Ryan M Van Wagoner
- Center for Marine Science, Department of Chemistry and Biochemistry, University of North Carolina Wilmington , 5600 Marvin K. Moss Lane, Wilmington, North Carolina 28409, United States
| | - Jeffrey L C Wright
- Center for Marine Science, Department of Chemistry and Biochemistry, University of North Carolina Wilmington , 5600 Marvin K. Moss Lane, Wilmington, North Carolina 28409, United States
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10
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Nowruzi B, Haghighat S, Fahimi H, Mohammadi E. Nostoc
cyanobacteria species: a new and rich source of novel bioactive compounds with pharmaceutical potential. JOURNAL OF PHARMACEUTICAL HEALTH SERVICES RESEARCH 2017. [DOI: 10.1111/jphs.12202] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Bahareh Nowruzi
- Department of Biology, Science and Research Branch; Islamic Azad University; Tehran Iran
| | - Setareh Haghighat
- Department of Microbiology; Faculty of Advanced Sciences & Technology; Pharmaceutical Sciences Branch; Islamic Azad University; IAUPS; Tehran Iran
| | - Hossein Fahimi
- Department of Molecular and Cellular Sciences; Faculty of Advanced Sciences & Technology; Pharmaceutical Sciences Branch; Islamic Azad University; IAUPS; Tehran Iran
| | - Ehsan Mohammadi
- Department of Molecular and Cellular Sciences; Faculty of Advanced Sciences & Technology; Pharmaceutical Sciences Branch; Islamic Azad University; IAUPS; Tehran Iran
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11
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Voráčová K, Hájek J, Mareš J, Urajová P, Kuzma M, Cheel J, Villunger A, Kapuscik A, Bally M, Novák P, Kabeláč M, Krumschnabel G, Lukeš M, Voloshko L, Kopecký J, Hrouzek P. The cyanobacterial metabolite nocuolin a is a natural oxadiazine that triggers apoptosis in human cancer cells. PLoS One 2017; 12:e0172850. [PMID: 28253280 PMCID: PMC5333925 DOI: 10.1371/journal.pone.0172850] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 02/11/2017] [Indexed: 12/22/2022] Open
Abstract
Oxadiazines are heterocyclic compounds containing N-N-O or N-N-C-O system within a six membered ring. These structures have been up to now exclusively prepared via organic synthesis. Here, we report the discovery of a natural oxadiazine nocuolin A (NoA) that has a unique structure based on 1,2,3-oxadiazine. We have identified this compound in three independent cyanobacterial strains of genera Nostoc, Nodularia, and Anabaena and recognized the putative gene clusters for NoA biosynthesis in their genomes. Its structure was characterized using a combination of NMR, HRMS and FTIR methods. The compound was first isolated as a positive hit during screening for apoptotic inducers in crude cyanobacterial extracts. We demonstrated that NoA-induced cell death has attributes of caspase-dependent apoptosis. Moreover, NoA exhibits a potent anti-proliferative activity (0.7-4.5 μM) against several human cancer lines, with p53-mutated cell lines being even more sensitive. Since cancers bearing p53 mutations are resistant to several conventional anti-cancer drugs, NoA may offer a new scaffold for the development of drugs that have the potential to target tumor cells independent of their p53 status. As no analogous type of compound was previously described in the nature, NoA establishes a novel class of bioactive secondary metabolites.
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Affiliation(s)
- Kateřina Voráčová
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Jan Hájek
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
- Biology Centre (CAS) v.v.i., Institute of Hydrobiology, České Budějovice, Czech Republic
| | - Jan Mareš
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
- Biology Centre (CAS) v.v.i., Institute of Hydrobiology, České Budějovice, Czech Republic
- Centre for Phycology, Institute of Botany (CAS) v.v.i., Czech Republic
| | - Petra Urajová
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
| | - Marek Kuzma
- Laboratory of Molecular Structure Characterization, Institute of Microbiology (CAS), Prague, Czech Republic
| | - José Cheel
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
| | - Andreas Villunger
- Medical University Innsbruck, Division of Developmental Immunology, Biocenter Innsbruck, Innsbruck, Austria
- Tyrolean Cancer Research Institute, Innsbruck, Austria
| | - Alexandra Kapuscik
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
| | - Marcel Bally
- British Columbia Cancer Agency, Department of Experimental Therapeutics, Vancouver, BC Canada
| | - Petr Novák
- Laboratory of Molecular Structure Characterization, Institute of Microbiology (CAS), Prague, Czech Republic
| | - Martin Kabeláč
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Gerhard Krumschnabel
- Medical University Innsbruck, Division of Developmental Immunology, Biocenter Innsbruck, Innsbruck, Austria
| | - Martin Lukeš
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
| | | | - Jiří Kopecký
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
| | - Pavel Hrouzek
- Centre Algatech, Institute of Microbiology, The Czech Academy of Sciences (CAS) v.v.i., Třeboň, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
- * E-mail:
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12
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Formighieri C, Melis A. Sustainable heterologous production of terpene hydrocarbons in cyanobacteria. PHOTOSYNTHESIS RESEARCH 2016; 130:123-135. [PMID: 26895437 DOI: 10.1007/s11120-016-0233-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/11/2016] [Indexed: 05/19/2023]
Abstract
Cyanobacteria can be exploited as photosynthetic platforms for heterologous generation of terpene hydrocarbons with industrial application. However, the slow catalytic activity of terpene synthases (k cat = 4 s-1 or slower) makes them noncompetitive for the pool of available substrate, thereby limiting the rate and yield of product generation. Work in this paper applied transformation technologies in Synechocystis for the heterologous production of β-phellandrene (monoterpene) hydrocarbons. Conditions were defined whereby expression of the β-phellandrene synthase (PHLS), as a CpcB·PHLS fusion protein with the β-subunit of phycocyanin, accounted for up to 20 % of total cellular protein. Moreover, CpcB·PHLS was heterologously co-expressed with enzymes of the mevalonic acid (MVA) pathway and geranyl-diphosphate synthase, increasing carbon flux toward the terpenoid biosynthetic pathway and enhancing substrate availability. These improvements enabled yields of 10 mg of β-phellandrene per g of dry cell weight generated in the course of a 48-h incubation period, or the equivalent of 1 % β-phellandrene:biomass (w:w) carbon-partitioning ratio. The work helped to identify prerequisites for the efficient heterologous production of terpene hydrocarbons in cyanobacteria: (i) requirement for overexpression of the heterologous terpene synthase, so as to compensate for the slow catalytic turnover of the enzyme, and (ii) enhanced endogenous carbon partitioning toward the terpenoid biosynthetic pathway, e.g., upon heterologous co-expression of the MVA pathway, thereby supplementing the native metabolic flux toward the universal isopentenyl-diphosphate and dimethylallyl-diphosphate terpenoid precursors. The two prerequisites are shown to be critical determinants of yield in the photosynthetic CO2 to terpene hydrocarbons conversion process.
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Affiliation(s)
- Cinzia Formighieri
- Department of Plant and Microbial Biology, University of California, 111 Koshland Hall, Berkeley, CA, 94720-3102, USA
| | - Anastasios Melis
- Department of Plant and Microbial Biology, University of California, 111 Koshland Hall, Berkeley, CA, 94720-3102, USA.
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13
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Le Manach S, Khenfech N, Huet H, Qiao Q, Duval C, Marie A, Bolbach G, Clodic G, Djediat C, Bernard C, Edery M, Marie B. Gender-Specific Toxicological Effects of Chronic Exposure to Pure Microcystin-LR or Complex Microcystis aeruginosa Extracts on Adult Medaka Fish. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8324-8334. [PMID: 27409512 DOI: 10.1021/acs.est.6b01903] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cyanobacterial blooms often occur in freshwater lakes and constitute a potential health risk to human populations, as well as to other organisms. However, their overall and specific implications for the health of aquatic organisms that are chronically and environmentally exposed to cyanobacteria producing hepatotoxins, such as microcystins (MCs), together with other bioactive compounds have still not been clearly established and remain difficult to assess. The medaka fish was chosen as the experimental aquatic model for studying the cellular and molecular toxicological effects on the liver after chronic exposures (28 days) to environmentally relevant concentrations of pure MC-LR, complex extracts of MC producing or nonproducing cyanobacterial biomasses, and of a Microcystis aeruginosa natural bloom. Our results showed a higher susceptibility of females to the different treatments compared to males at both the cellular and the molecular levels. Although hepatocyte lysis increased with MC-containing treatments, lysis always appeared more severe in the liver of females compare to males, and the glycogen cellular reserves also appeared to decrease more in the liver of females compared to those in the males. Proteomic investigations reveal divergent responses between males and females exposed to all treatments, especially for proteins involved in metabolic and homeostasis processes. Our observations also highlighted the dysregulation of proteins involved in oogenesis in female livers. These results suggest that fish populations exposed to cyanobacteria blooms may potentially face several ecotoxicological issues.
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Affiliation(s)
- Séverine Le Manach
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Nour Khenfech
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Hélène Huet
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
- Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , BioPôle Alfort, 94700 Maison-Alfort, France
| | - Qin Qiao
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Charlotte Duval
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Arul Marie
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Gérard Bolbach
- Institut de Biologie Paris Seine/FR 3631, Plateforme Spectrométrie de masse et Protéomique, Sorbonne Universités, Université Pierre et Marie Curie , 75005 Paris, France
| | - Gilles Clodic
- Institut de Biologie Paris Seine/FR 3631, Plateforme Spectrométrie de masse et Protéomique, Sorbonne Universités, Université Pierre et Marie Curie , 75005 Paris, France
| | - Chakib Djediat
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Cécile Bernard
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Marc Edery
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
| | - Benjamin Marie
- UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d'Histoire Naturelle , CP 39, 12 Rue Buffon, 75005 Paris, France
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14
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Gunasekera SP, Imperial L, Garst C, Ratnayake R, Dang LH, Paul VJ, Luesch H. Caldoramide, a Modified Pentapeptide from the Marine Cyanobacterium Caldora penicillata. JOURNAL OF NATURAL PRODUCTS 2016; 79:1867-1871. [PMID: 27380142 PMCID: PMC5215049 DOI: 10.1021/acs.jnatprod.6b00203] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The isolation, structure determination, and biological activities of a new linear pentapeptide, caldoramide (5), from the marine cyanobacterium Caldora penicillata from Florida are described. Caldoramide (5) has structural similarities to belamide A (4), dolastatin 10 (1), and dolastatin 15 (2). We profiled caldoramide against parental HCT116 colorectal cancer cells and isogenic cells lacking oncogenic KRAS or hypoxia-inducible factors 1α (HIF-1α) and 2α (HIF-2α). Caldoramide (5) showed differential cytotoxicity for cells containing both oncogenic KRAS and HIF over the corresponding knockout cells. LCMS dereplication indicated the presence of caldoramide (5) in a subset of C. penicillata samples.
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Affiliation(s)
- Sarath P. Gunasekera
- Smithsonian Marine Station at Ft. Pierce, 701 Seaway Drive, Ft. Pierce, Florida 34949, USA
| | - Lorelie Imperial
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, USA
- Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, USA
| | - Christiana Garst
- Smithsonian Marine Station at Ft. Pierce, 701 Seaway Drive, Ft. Pierce, Florida 34949, USA
| | - Ranjala Ratnayake
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, USA
- Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, USA
| | - Long H. Dang
- Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, USA
- Department of Medicine, University of Florida, Gainesville, Florida 32610, USA
| | - Valerie J. Paul
- Smithsonian Marine Station at Ft. Pierce, 701 Seaway Drive, Ft. Pierce, Florida 34949, USA
| | - Hendrik Luesch
- Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, USA
- Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, USA
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15
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Strangman WK, Wright JL. Microginins 680, 646, and 612—new chlorinated Ahoa-containing peptides from a strain of cultured Microcystis aeruginosa. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Teta R, Sala GD, Glukhov E, Gerwick L, Gerwick WH, Mangoni A, Costantino V. Combined LC-MS/MS and Molecular Networking Approach Reveals New Cyanotoxins from the 2014 Cyanobacterial Bloom in Green Lake, Seattle. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:14301-10. [PMID: 26567695 PMCID: PMC4851459 DOI: 10.1021/acs.est.5b04415] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Cyanotoxins obtained from a freshwater cyanobacterial collection at Green Lake, Seattle during a cyanobacterial harmful algal bloom in the summer of 2014 were studied using a new approach based on molecular networking analysis of liquid chromatography tandem mass spectrometry (LC-MS/MS) data. This MS networking approach is particularly well-suited for the detection of new cyanotoxin variants and resulted in the discovery of three new cyclic peptides, namely microcystin-MhtyR (6), which comprised about half of the total microcystin content in the bloom, and ferintoic acids C (12) and D (13). Structure elucidation of 6 was aided by a new microscale methylation procedure. Metagenomic analysis of the bloom using the 16S-ITS rRNA region identified Microcystis aeruginosa as the predominant cyanobacterium in the sample. Fragments of the putative biosynthetic genes for the new cyanotoxins were also identified, and their sequences correlated to the structure of the isolated cyanotoxins.
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Affiliation(s)
- Roberta Teta
- The NeaNat Group (www.neanat.unina.it), Dipartimento di Farmacia, Universita degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Gerardo Della Sala
- The NeaNat Group (www.neanat.unina.it), Dipartimento di Farmacia, Universita degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Evgenia Glukhov
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, 9500 Gilman Drive, MC 0212, La Jolla, CA 92093-0212, USA
| | - Lena Gerwick
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, 9500 Gilman Drive, MC 0212, La Jolla, CA 92093-0212, USA
| | - William H. Gerwick
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, 9500 Gilman Drive, MC 0212, La Jolla, CA 92093-0212, USA
| | - Alfonso Mangoni
- The NeaNat Group (www.neanat.unina.it), Dipartimento di Farmacia, Universita degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Valeria Costantino
- The NeaNat Group (www.neanat.unina.it), Dipartimento di Farmacia, Universita degli Studi di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
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17
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A phycocyanin·phellandrene synthase fusion enhances recombinant protein expression and β-phellandrene (monoterpene) hydrocarbons production in Synechocystis (cyanobacteria). Metab Eng 2015; 32:116-124. [DOI: 10.1016/j.ymben.2015.09.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 09/04/2015] [Accepted: 09/08/2015] [Indexed: 11/19/2022]
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18
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Tomek P, Hrouzek P, Kuzma M, Sýkora J, Fišer R, Černý J, Novák P, Bártová S, Šimek P, Hof M, Kavan D, Kopecký J. Cytotoxic Lipopeptide Muscotoxin A, Isolated from Soil Cyanobacterium Desmonostoc muscorum, Permeabilizes Phospholipid Membranes by Reducing Their Fluidity. Chem Res Toxicol 2015; 28:216-24. [DOI: 10.1021/tx500382b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Petr Tomek
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
- Auckland
Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, 85 Park Road, 1023 Auckland, New Zealand
| | - Pavel Hrouzek
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
- Faculty
of Science, Institute of Chemistry, University of South Bohemia, Branišovská
1760, 370 05 České
Budějovice, Czech Republic
| | - Marek Kuzma
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Jan Sýkora
- Department
of Biophysical Chemistry, J. Heyrovský Institute of Physical
Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
2155/3, 182 23 Prague
8, Czech Republic
| | - Radovan Fišer
- Department
of Genetics and Microbiology, Faculty of Sciences, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic
| | - Jan Černý
- Department
of Cell Biology, Faculty of Sciences, Charles University, Viničná
7, 128 00 Prague
2, Czech Republic
| | - Petr Novák
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
- Department
of Biochemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 40 Prague, Czech Republic
| | - Simona Bártová
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
- Department
of Analytical Chemistry, Institute of Chemical Technology, Technická
5, 166 28 Dejvice, Prague, Czech Republic
| | - Petr Šimek
- Institute
of Entomology, Biology Centre, Academy of Sciences of the Czech Republic, v.v.i., 370 05 České Budějovice, Czech Republic
| | - Martin Hof
- Department
of Biophysical Chemistry, J. Heyrovský Institute of Physical
Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
2155/3, 182 23 Prague
8, Czech Republic
| | - Daniel Kavan
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Jiří Kopecký
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
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19
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Formighieri C. Cyanobacteria as a Platform for Direct Photosynthesis-to-Fuel Conversion. SPRINGERBRIEFS IN ENVIRONMENTAL SCIENCE 2015. [DOI: 10.1007/978-3-319-16730-5_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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20
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Formighieri C, Melis A. Regulation of β-phellandrene synthase gene expression, recombinant protein accumulation, and monoterpene hydrocarbons production in Synechocystis transformants. PLANTA 2014; 240:309-24. [PMID: 24838596 DOI: 10.1007/s00425-014-2080-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 04/13/2014] [Indexed: 05/04/2023]
Abstract
Successful application of the photosynthesis-to-fuels approach requires a high product-to-biomass carbon-partitioning ratio. The work points to the limiting amounts of heterologous terpene synthase in cyanobacteria as a potential barrier in the yield of terpene hydrocarbons via photosynthesis. Cyanobacteria like Synechocystis sp. can be exploited as platforms in a photosynthesis-to-fuels process for the generation of terpene hydrocarbons. Successful application of this concept requires maximizing photosynthesis and attaining a high endogenous carbon partitioning toward the desirable product. The work addressed the question of the regulation of β-phellandrene synthase transgene expression in relation to product yield from the terpenoid biosynthetic pathway of cyanobacteria. The choice of strong alternative transcriptional and translational cis-regulatory elements and the choice of the Synechocystis genomic DNA loci for transgene insertion were investigated. Specifically, the β-phellandrene synthase transgene was expressed under the control of the endogenous psbA2 promoter, or under the control of the Ptrc promoter from Escherichia coli with the translation initiation region of highly expressed gene 10 from bacteriophage T7. These heterologous elements allowed for constitutive transgene expression. In addition, the β-phellandrene synthase construct was directed to replace the Synechocystis cpc operon, encoding the peripheral phycocyanin rods of the phycobilisome antenna. Results showed that a 4-fold increase in the cellular content of the β-phellandrene synthase was accompanied by a 22-fold increase in β-phellandrene yield, suggesting limitations in rate and yield by the amount of the transgenic enzyme. The work points to the limiting amount of transgenic terpene synthases as a potential barrier in the heterologous generation of terpene products via the process of photosynthesis.
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Affiliation(s)
- Cinzia Formighieri
- Department of Plant and Microbial Biology, University of California, 111 Koshland Hall, Berkeley, CA, 94720-3102, USA,
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21
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Kapuścik A, Hrouzek P, Kuzma M, Bártová S, Novák P, Jokela J, Pflüger M, Eger A, Hundsberger H, Kopecký J. Novel Aeruginosin-865 from Nostoc sp. as a potent anti-inflammatory agent. Chembiochem 2013; 14:2329-37. [PMID: 24123716 DOI: 10.1002/cbic.201300246] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Indexed: 01/13/2023]
Abstract
Aeruginosin-865 (Aer-865), isolated from terrestrial cyanobacterium Nostoc sp. Lukešová 30/93, is the first aeruginosin-type peptide containing both a fatty acid and a carbohydrate moiety, and is the first aeruginosin to be found in the genus Nostoc. Mass spectrometry, chemical and spectroscopic analysis as well as one- and two-dimensional NMR and chiral HPLC analysis of Marfey derivatives were applied to determine the peptidic sequence: D-Hpla, D-Leu, 5-OH-Choi, Agma, with hexanoic and mannopyranosyl uronic acid moieties linked to Choi. We used an AlphaLISA assay to measure the levels of proinflammatory mediators IL-8 and ICAM-1 in hTNF-α-stimulated HLMVECs. Aer-865 showed significant reduction of both: with EC50 values of (3.5±1.5) μg mL(-1) ((4.0±1.7) μM) and (50.0±13.4) μg mL(-1) ((57.8±15.5) μM), respectively. Confocal laser scanning microscopy revealed that the anti-inflammatory effect of Aer-865 was directly associated with inhibition of NF-κB translocation to the nucleus. Moreover, Aer-865 did not show any cytotoxic effect.
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Affiliation(s)
- Aleksandra Kapuścik
- Department of Phototrophic Microorganisms-ALGATECH, Institute of Microbiology, Academy of Science of the Czech Republic, Opatovický mlýn, 379 81 Třeboň (Czech Republic)
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22
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Estimation of ion competition via correlated responsivity offset in linear ion trap mass spectrometry analysis: theory and practical use in the analysis of cyanobacterial hepatotoxin microcystin-LR in extracts of food additives. BIOMED RESEARCH INTERNATIONAL 2013; 2013:414631. [PMID: 23586036 PMCID: PMC3622288 DOI: 10.1155/2013/414631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 12/12/2012] [Accepted: 01/16/2013] [Indexed: 11/17/2022]
Abstract
Responsivity is a conversion qualification of a measurement device given by the functional dependence between the input and output quantities. A concentration-response-dependent calibration curve represents the most simple experiment for the measurement of responsivity in mass spectrometry. The cyanobacterial hepatotoxin microcystin-LR content in complex biological matrices of food additives was chosen as a model example of a typical problem. The calibration curves for pure microcystin and its mixtures with extracts of green alga and fish meat were reconstructed from the series of measurement. A novel approach for the quantitative estimation of ion competition in ESI is proposed in this paper. We define the correlated responsivity offset in the intensity values using the approximation of minimal correlation given by the matrix to the target mass values of the analyte. The estimation of the matrix influence enables the approximation of the position of a priori unknown responsivity and was easily evaluated using a simple algorithm. The method itself is directly derived from the basic attributes of the theory of measurements. There is sufficient agreement between the theoretical and experimental values. However, some theoretical issues are discussed to avoid misinterpretations and excessive expectations.
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23
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Wang XJ, Zhang J, Wang JD, Qian PT, Liu CX, Xiang WS. Novel cyclopentenone derivatives produced by a rare actinobacterial strain Actinoalloteichus nanshanensis sp. nov. NEAU 119. Nat Prod Res 2013; 27:1863-9. [DOI: 10.1080/14786419.2013.771349] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xiang-Jing Wang
- School of Life Science, Life Science and Biotechnology Research Center, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ji Zhang
- School of Life Science, Life Science and Biotechnology Research Center, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ji-Dong Wang
- Department of New Drug Screening, Zhejiang Hisun Pharmaceutical Company Limited, Taizhou, 318000, People's Republic of China
| | - Ping-Ting Qian
- School of Life Science, Life Science and Biotechnology Research Center, Northeast Agricultural University, Harbin, 150030, People's Republic of China
- Department of New Drug Screening, Zhejiang Hisun Pharmaceutical Company Limited, Taizhou, 318000, People's Republic of China
| | - Chong-Xi Liu
- School of Life Science, Life Science and Biotechnology Research Center, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Wen-Sheng Xiang
- School of Life Science, Life Science and Biotechnology Research Center, Northeast Agricultural University, Harbin, 150030, People's Republic of China
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24
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D'ors A, Bartolomé MC, Sánchez-Fortún S. Toxic risk associated with sporadic occurrences of Microcystis aeruginosa blooms from tidal rivers in marine and estuarine ecosystems and its impact on Artemia franciscana nauplii populations. CHEMOSPHERE 2013; 90:2187-2192. [PMID: 23246722 DOI: 10.1016/j.chemosphere.2012.11.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 11/06/2012] [Accepted: 11/16/2012] [Indexed: 06/01/2023]
Abstract
Microcystis aeruginosa is a species of freshwater cyanobacteria which can form harmful algal blooms in freshwater water bodies worldwide. However, in spite its sporadic occurrences for short periods of time in estuarine waters, their influence on zooplankton populations present in these ecosystems has not been extensively studied. In this work, Artemia franciscana was used as test organism model, studying mortality against several strains of M. aeruginosa with different degrees of toxigenicity, measuring whole-live cells and homogenate extracts. Results were compared with microcystin-LR equivalent content, measured by immunoassay. The results show that there were no significant differences between both exposure models (whole cells and extracts), and there are significant differences respect to the toxigenicity of cyanobacterial blooms depending of the M. aerugionosa strain involved in the process. Analysis of microcystin-LR equivalent concentration test immediately below the lowest significant concentration in all M. aerugionosa strains was used to determine the potential risk associated with the cell densities during a bloom. Comparison among the selected M. aerugionsa strains show that these factors have influence in the results obtained, and thus, several differences have been evidenced depending of the microcystin-LR equivalent production and the strain type involved.
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Affiliation(s)
- A D'ors
- Dpto. Toxicología y Farmacología, Universidad Complutense de Madrid, Avenida Puerta de Hierro, s/n, 28040 Madrid, Spain
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25
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Leikoski N, Fewer DP, Jokela J, Alakoski P, Wahlsten M, Sivonen K. Analysis of an inactive cyanobactin biosynthetic gene cluster leads to discovery of new natural products from strains of the genus Microcystis. PLoS One 2012; 7:e43002. [PMID: 22952627 PMCID: PMC3428304 DOI: 10.1371/journal.pone.0043002] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 07/16/2012] [Indexed: 11/26/2022] Open
Abstract
Cyanobactins are cyclic peptides assembled through the cleavage and modification of short precursor proteins. An inactive cyanobactin gene cluster has been described from the genome Microcystis aeruginosa NIES843. Here we report the discovery of active counterparts in strains of the genus Microcystis guided by this silent cyanobactin gene cluster. The end products of the gene clusters were structurally diverse cyclic peptides, which we named piricyclamides. Some of the piricyclamides consisted solely of proteinogenic amino acids while others contained disulfide bridges and some were prenylated or geranylated. The piricyclamide gene clusters encoded between 1 and 4 precursor genes. They encoded highly diverse core peptides ranging in length from 7–17 amino acids with just a single conserved amino acid. Heterologous expression of the pir gene cluster from Microcystis aeruginosa PCC7005 in Escherichia coli confirmed that this gene cluster is responsible for the biosynthesis of piricyclamides. Chemical analysis demonstrated that Microcystis strains could produce an array of piricyclamides some of which are geranylated or prenylated. The genetic diversity of piricyclamides in a bloom sample was explored and 19 different piricyclamide precursor genes were found. This study provides evidence for a stunning array of piricyclamides in Microcystis, a worldwide occurring bloom forming cyanobacteria.
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Affiliation(s)
- Niina Leikoski
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - David P. Fewer
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Jouni Jokela
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Pirita Alakoski
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Matti Wahlsten
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Kaarina Sivonen
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
- * E-mail:
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26
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Balunas MJ, Grosso MF, Villa FA, Engene N, McPhail KL, Tidgewell K, Pineda LM, Gerwick L, Spadafora C, Kyle DE, Gerwick WH. Coibacins A-D, antileishmanial marine cyanobacterial polyketides with intriguing biosynthetic origins. Org Lett 2012; 14:3878-81. [PMID: 22794317 DOI: 10.1021/ol301607q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four unsaturated polyketide lactone derivatives, coibacins A-D, were isolated from a Panamanian marine cyanobacterium, cf. Oscillatoria sp. The two different types of termini observed in these co-occurring metabolites, either a methyl cyclopropyl ring as seen in curacin A or a methyl vinyl chloride similar to that observed in the jamaicamides, suggest an intriguing flexibility in the "beta branch" forming biosynthetic process. The coibacins possess selective antileishmanial activity as well as potent anti-inflammatory activity.
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Affiliation(s)
- Marcy J Balunas
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California 92093, USA
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27
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Kang HS, Krunic A, Orjala J. Sanctolide A, a 14-membered PK-NRP hybrid macrolide from the cultured cyanobacterium Oscillatoria sancta (SAG 74.79). Tetrahedron Lett 2012; 53:3563-3567. [PMID: 22711943 PMCID: PMC3375721 DOI: 10.1016/j.tetlet.2012.04.136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Sanctolide A (1), a 14-membered polyketide-nonribosomal peptide (PK-NRP) hybrid macrolide, was isolated from the cultured cyanobacterium Oscillatoria sancta (SAG 74.79). The planar structure was determined using various spectroscopic techniques including HRESIMS, and 1D and 2D NMR analyses. The relative configuration was assigned by J-based configurational analysis in combination with NOE correlations. The absolute configuration was determined by Mosher ester and enantioselective HPLC analyses. The structure of sanctolide A (1) features a rare N-methyl enamide and a 2-hydroxyisovaleric acid, which are incorporated to form a 14-membered macrolide ring structure, comprising a new type of cyanobacterial macrolides derived from a PKS-NRPS hybrid biosynthetic pathway.
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Affiliation(s)
- Hahk-Soo Kang
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Aleksej Krunic
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Jimmy Orjala
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
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28
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Kang HS, Santarsiero BD, Kim H, Krunic A, Shen Q, Swanson SM, Chai H, Kinghorn AD, Orjala J. Merocyclophanes A and B, antiproliferative cyclophanes from the cultured terrestrial Cyanobacterium Nostoc sp. PHYTOCHEMISTRY 2012; 79:109-15. [PMID: 22571940 PMCID: PMC3374012 DOI: 10.1016/j.phytochem.2012.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 03/02/2012] [Accepted: 03/16/2012] [Indexed: 05/07/2023]
Abstract
The cell extract of a cultured terrestrial Nostoc sp. (UIC 10062), obtained from a sample collected at Grand Mere State Park in Michigan, displayed antiproliferative activity against the HT-29 human colon cancer cell line. Bioactivity-guided fractionation of the cell extract, combined with LC-MS analysis, led to the isolation of two cyclophanes, named merocyclophanes A and B (1 and 2). Their structures were determined by various spectroscopic techniques including HRESIMS, and 1D and 2D NMR analyses. The stereoconfiguration was assigned on the basis of X-ray crystallographic and CD analyses. The structures of merocyclophanes A and B (1 and 2) established a hitherto unknown [7.7]paracyclophane skeleton in nature, as characterized by α-branched methyls at C-1/14. Merocyclophanes A and B (1 and 2) displayed antiproliferative activity against the HT-29 human colon cancer cell line with IC₅₀ values of 3.3 and 1.7 μM, respectively.
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Affiliation(s)
- Hahk-Soo Kang
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
| | - Bernard D. Santarsiero
- Center for Pharmaceutical Biotechnology, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Hyunjung Kim
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
| | - Aleksej Krunic
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
| | - Qi Shen
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
| | - Steven M. Swanson
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
| | - Heebyung Chai
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - A. Douglas Kinghorn
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Jimmy Orjala
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, USA
- Adress for correspondence: Jimmy Orjala, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, 833, South Wood Street, University of Illinois at Chicago, Chicago, IL 60612, USA, (M/C781), Tel: 312-996-5583, Fax: 312-996-7107,
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Kang HS, Krunic A, Orjala J. Stigonemapeptin, an Ahp-containing depsipeptide with elastase inhibitory activity from the bloom-forming freshwater cyanobacterium Stigonema sp. JOURNAL OF NATURAL PRODUCTS 2012; 75:807-11. [PMID: 22483033 PMCID: PMC3338906 DOI: 10.1021/np300150h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Stigonemapeptin (1), a depsipeptide containing an Ahp (3-amino-6-hydroxy-2-piperidone) residue, was isolated from a bloom sample of the freshwater cyanobacterium Stigonema sp. collected from North Nokomis Lake in the Highland Lake District of northern Wisconsin. The planar structure was determined by 1D and 2D NMR experiments as well as HRESIMS analysis. The absolute configurations of the amino acids were determined using the advanced Marfey's method after acid hydrolysis. Stigonemapeptin (1), characterized by the presence of the Ahp residue, also contained the modified amino acids Abu (2-amino-2-butenoic acid) and N-formylated Pro. Stigonemapeptin (1) showed in vitro elastase and chymotrypsin inhibitory activity, with IC(50) values of 0.26 and 2.93 μM, respectively.
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Affiliation(s)
| | | | - Jimmy Orjala
- To whom correspondence should be addressed. Tel: +1-312-996-5583. Fax: +1-312-996-7107.
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30
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Cheruku P, Plaza A, Lauro G, Keffer J, Lloyd JR, Bifulco G, Bewley CA. Discovery and synthesis of namalide reveals a new anabaenopeptin scaffold and peptidase inhibitor. J Med Chem 2012; 55:735-42. [PMID: 22168797 DOI: 10.1021/jm201238p] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The discovery, structure elucidation, and solid-phase synthesis of namalide, a marine natural product, are described. Namalide is a cyclic tetrapeptide; its macrocycle is formed by only three amino acids, with an exocyclic ureido phenylalanine moiety at its C-terminus. The absolute configuration of namalide was established, and analogs were generated through Fmoc-based solid phase peptide synthesis. We found that only natural namalide and not its analogs containing l-Lys or l-allo-Ile inhibited carboxypeptidase A at submicromolar concentrations. In parallel, an inverse virtual screening approach aimed at identifying protein targets of namalide selected carboxypeptidase A as the third highest scoring hit. Namalide represents a new anabaenopeptin-type scaffold, and its protease inhibitory activity demonstrates that the 13-membered macrolactam can exhibit similar activity as the more common hexapeptides.
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Affiliation(s)
- Pradeep Cheruku
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
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31
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Zapomělová E, Hrouzek P, Řezanka T, Jezberová J, Řeháková K, Hisem D, Komárková J. POLYPHASIC CHARACTERIZATION OF DOLICHOSPERMUM SPP. AND SPHAEROSPERMOPSIS SPP. (NOSTOCALES, CYANOBACTERIA): MORPHOLOGY, 16S rRNA GENE SEQUENCES AND FATTY ACID AND SECONDARY METABOLITE PROFILES(1). JOURNAL OF PHYCOLOGY 2011; 47:1152-1163. [PMID: 27020196 DOI: 10.1111/j.1529-8817.2011.01034.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The genera Dolichospermum (Ralfs ex Bornet et Flahault) Wacklin, L. Hoffm. et Komárek and Sphaerospermopsis Zapomělová, Jezberová, Hrouzek, Hisem, K. Řeháková et Komárk.-Legn. represent a highly diversified group of planktonic cyanobacteria that have been recently separated from the traditional genus Anabaena Bory ex Bornet et Flahault. In this study, morphological diversity, phylogeny of the 16S rRNA gene, production of fatty acids, and secondary metabolite profiles were evaluated in 33 strains of 14 morphospecies isolated from the Czech Republic. Clustering of the strains based on 16S rRNA gene sequences corresponded to wider groups of species in terms of morphology. The overall secondary metabolite and fatty acid profiles, however, were not correlated to each other and neither were they correlated to the 16S rRNA phylogeny nor the morphology of the strains. Nevertheless, a minor part of the detected secondary metabolites (19% of all compounds) was present only in close relatives and can be thus considered as autapomorphic features.
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Affiliation(s)
- Eliška Zapomělová
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Pavel Hrouzek
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Tomáš Řezanka
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Jitka Jezberová
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Klára Řeháková
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Daniel Hisem
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
| | - Jaroslava Komárková
- Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech RepublicInstitute of Microbiology, AS CR, Vídeňská 1083, CZ-14220 Prague, Czech RepublicBiology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovický mlýn, CZ-379 81 Třeboň, Czech Republic University of South Bohemia, Faculty of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ-37982 Třeboň, Czech Republic
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Kang HS, Krunic A, Shen Q, Swanson SM, Orjala J. Minutissamides A-D, antiproliferative cyclic decapeptides from the cultured cyanobacterium Anabaena minutissima. JOURNAL OF NATURAL PRODUCTS 2011; 74:1597-605. [PMID: 21699148 PMCID: PMC3142320 DOI: 10.1021/np2002226] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Four cyclic decapeptides, minutissamides A-D (1-4), were isolated from the cultured cyanobacterium Anabaena minutissima (UTEX 1613). The planar structures were determined using various spectroscopic techniques including HRESIMS and 1D and 2D NMR experiments. The absolute configurations of the α-amino acid residues were assigned using Marfey's method after acid hydrolysis. The absolute configuration of a β-amino acid residue was assigned by a combination of the advanced Marfey's method, J-based configurational analysis, and ROE spectroscopic analysis. The structures of minutissamides A-D (1-4) were characterized by the presence of three nonstandard α-amino acid residues (two α,β-dehydro-α-aminobutyric acids and one N-methylated Asn) and one β-amino acid residue (2-hydroxy-3-amino-4-methyldodecanoic acid or 2-hydroxy-3-amino-4-methylhexadecanoic acid). Minutissamides A-D (1-4) exhibited antiproliferative activity against the HT-29 human colon cancer cell line with IC₅₀ values of 2.0, 20.0, 11.8, and 22.7 μM, respectively.
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Affiliation(s)
| | | | | | | | - Jimmy Orjala
- To whom correspondence should be addressed. Tel: +1-312-996-5583. Fax: +1-312-996-7107.
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33
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Hisem D, Hrouzek P, Tomek P, Tomšíčková J, Zapomělová E, Skácelová K, Lukešová A, Kopecký J. Cyanobacterial cytotoxicity versus toxicity to brine shrimp Artemia salina. Toxicon 2011; 57:76-83. [DOI: 10.1016/j.toxicon.2010.10.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 10/01/2010] [Accepted: 10/04/2010] [Indexed: 10/19/2022]
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Mo S, Krunic A, Santarsiero BD, Franzblau SG, Orjala J. Hapalindole-related alkaloids from the cultured cyanobacterium Fischerella ambigua. PHYTOCHEMISTRY 2010; 71:2116-23. [PMID: 20965528 PMCID: PMC2981615 DOI: 10.1016/j.phytochem.2010.09.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 07/21/2010] [Accepted: 09/20/2010] [Indexed: 05/26/2023]
Abstract
Four hapalindole-related alkaloids, namely fischambiguines A and B, ambiguine P, ambiguine Q nitrile as well as ambiguine G nitrile were identified from the cultured cyanobacterium Fischerella ambigua (UTEX 1903). The structures were determined by spectroscopic analysis including MS, 1D and 2D NMR and X-ray crystallography. The alkaloids possessed fused pentacyclic and hexacyclic carbon skeletons. Fischambiguine B displayed a strong inhibitory activity against Mycobacterium tuberculosis with an MIC value of 2 μM, with no detectable cytotoxicity in a Vero cell line.
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Affiliation(s)
- Shunyan Mo
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Aleksej Krunic
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Bernard D. Santarsiero
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA
- Center for Pharmaceutical Biotechnology, University of Illinois at Chicago, IL 60612, USA
| | - Scott G. Franzblau
- Institute for Tuberculosis Research, University of Illinois at Chicago, 833 S. Wood St. Room 412, Chicago, Illinois 60612
| | - Jimmy Orjala
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA
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35
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Soria-Mercado IE, Pereira A, Cao Z, Murray TF, Gerwick WH. Alotamide A, a novel neuropharmacological agent from the marine cyanobacterium Lyngbya bouillonii. Org Lett 2009; 11:4704-7. [PMID: 19754100 DOI: 10.1021/ol901438b] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alotamide A (1), a structurally intriguing cyclic depsipeptide, was isolated from the marine mat-forming cyanobacterium Lyngbya bouillonii collected in Papua New Guinea. It features three contiguous peptidic residues and an unsaturated heptaketide with oxidations and methylations unlike those found in any other marine cyanobacterial metabolite. Pure alotamide A (1) displays an unusual calcium influx activation profile in murine cerebrocortical neurons with an EC50 of 4.18 microM.
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Affiliation(s)
- Irma E Soria-Mercado
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California 92037, USA
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Pereira A, Cao Z, Murray TF, Gerwick WH. Hoiamide a, a sodium channel activator of unusual architecture from a consortium of two papua new Guinea cyanobacteria. ACTA ACUST UNITED AC 2009; 16:893-906. [PMID: 19716479 DOI: 10.1016/j.chembiol.2009.06.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Revised: 06/23/2009] [Accepted: 06/26/2009] [Indexed: 11/30/2022]
Abstract
Hoiamide A, a novel bioactive cyclic depsipeptide, was isolated from an environmental assemblage of the marine cyanobacteria Lyngbya majuscula and Phormidium gracile collected in Papua New Guinea. This stereochemically complex metabolite possesses a highly unusual structure, which likely derives from a mixed peptide-polyketide biogenetic origin, and includes a peptidic section featuring an acetate extended and S-adenosyl methionine modified isoleucine moiety, a triheterocyclic fragment bearing two alpha-methylated thiazolines and one thiazole, and a highly oxygenated and methylated C15-polyketide substructure. Pure hoiamide A potently inhibited [(3)H]batrachotoxin binding to voltage-gated sodium channels (IC(50) = 92.8 nM), activated sodium influx (EC(50) = 2.31 microM) in mouse neocortical neurons, and exhibited modest cytotoxicity to cancer cells. Further investigation revealed that hoiamide A is a partial agonist of site 2 on the voltage-gated sodium channel.
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Affiliation(s)
- Alban Pereira
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, 92093, USA
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Mo S, Krunic A, Pegan SD, Franzblau SG, Orjala J. An antimicrobial guanidine-bearing sesterterpene from the cultured cyanobacterium Scytonema sp. JOURNAL OF NATURAL PRODUCTS 2009; 72:2043-5. [PMID: 19888742 PMCID: PMC2988765 DOI: 10.1021/np900288x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Scytoscalarol (1), a antimicrobial sesterterpene bearing a guanidino group, was isolated from the cultured cyanobacterium Scytonema sp. (UTEX 1163) by bioassay-guided fractionation. The chemical structure was determined by spectroscopic analysis including MS and 1D and 2D NMR. Scytoscalarol (1) showed antimicrobial activities against Bacillus anthracis, Staphylococcus aureus, Escherichia coli, Candida albicans, and Mycobacterium tuberculosis with MIC values in the range from 2 to 110 microM.
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Affiliation(s)
- Shunyan Mo
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612
| | - Aleksej Krunic
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612
| | - Scott D. Pegan
- Center for Pharmaceutical Biotechnology, University of Illinois at Chicago, 900 S. Ashland Avenue, Chicago, IL 60607
| | - Scott G. Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612
| | - Jimmy Orjala
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612
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Kalaitzis JA, Lauro FM, Neilan BA. Mining cyanobacterial genomes for genes encoding complex biosynthetic pathways. Nat Prod Rep 2009; 26:1447-65. [PMID: 19844640 DOI: 10.1039/b817074f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- John A Kalaitzis
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
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Rastogi RP, Sinha RP. Biotechnological and industrial significance of cyanobacterial secondary metabolites. Biotechnol Adv 2009; 27:521-39. [DOI: 10.1016/j.biotechadv.2009.04.009] [Citation(s) in RCA: 173] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Revised: 04/13/2009] [Accepted: 04/14/2009] [Indexed: 01/22/2023]
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40
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Jones AC, Gu L, Sorrels CM, Sherman DH, Gerwick WH. New tricks from ancient algae: natural products biosynthesis in marine cyanobacteria. Curr Opin Chem Biol 2009; 13:216-23. [PMID: 19307147 DOI: 10.1016/j.cbpa.2009.02.019] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 02/13/2009] [Accepted: 02/14/2009] [Indexed: 11/25/2022]
Abstract
Cyanobacteria, among Earth's oldest organisms, have evolved sophisticated biosynthetic pathways to produce a rich arsenal of bioactive natural products. In consequence, cyanobacterial secondary metabolites have been an incredibly fruitful source of lead compounds in drug discovery efforts. Investigations into the biochemistry responsible for the creation of these compounds, complemented by genome sequencing efforts, are revealing unique enzymatic mechanisms not described or rarely described elsewhere in the natural world. Herein, we discuss recent advances in understanding the biosynthesis of three cyanobacterial classes of natural product: mixed polyketide synthase/non ribosomal peptide synthetase (PKS/NRPS) metabolites, aromatic amino acid-derived alkaloids, and ribosomally encoded cyclic peptides. The unique biosynthetic mechanisms employed by cyanobacteria are inspiring new developments in heterologous gene expression and biotechnology.
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Affiliation(s)
- Adam C Jones
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA
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Blunt JW, Copp BR, Hu WP, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2009; 26:170-244. [PMID: 19177222 DOI: 10.1039/b805113p] [Citation(s) in RCA: 408] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review covers the literature published in 2007 for marine natural products, with 948 citations(627 for the period January to December 2007) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, cnidarians,bryozoans, molluscs, tunicates, echinoderms and true mangrove plants. The emphasis is on new compounds (961 for 2007), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.1 Introduction, 2 Reviews, 3 Marine microorganisms and phytoplankton, 4 Green algae, 5 Brown algae, 6 Red algae, 7 Sponges, 8 Cnidarians, 9 Bryozoans, 10 Molluscs, 11 Tunicates (ascidians),12 Echinoderms, 13 Miscellaneous, 14 Conclusion, 15 References.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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Linington RG, Clark BR, Trimble EE, Almanza A, Ureña LD, Kyle DE, Gerwick WH. Antimalarial peptides from marine cyanobacteria: isolation and structural elucidation of gallinamide A. JOURNAL OF NATURAL PRODUCTS 2009; 72:14-7. [PMID: 19161344 PMCID: PMC2760338 DOI: 10.1021/np8003529] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
As part of a continuing program to identify novel treatments for neglected parasitic diseases, the Panama International Cooperative Biodiversity Group (ICBG) program has been investigating the antimalarial potential of secondary metabolites from Panamanian marine cyanobacteria. From over 60 strains of cyanobacteria evaluated in our biological screens, the organic extract of a Schizothrix species from a tropical reef near Piedras Gallinas (Caribbean coast of Panama) showed potent initial antimalarial activity against the W2 chloroquine-resistant strain of Plasmodium falciparum. Bioassay-guided fractionation followed by 2D NMR analysis afforded the planar structure of a new and highly functionalized linear peptide, gallinamide A. Subsequent degradation and derivatization methods were used to determine the absolute configuration at most stereogenic centers in this unusual new metabolite.
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Affiliation(s)
- Roger G Linington
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, USA.
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Moore BS. Extending the biosynthetic repertoire in ribosomal peptide assembly. Angew Chem Int Ed Engl 2008; 47:9386-8. [PMID: 18846537 DOI: 10.1002/anie.200803868] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bradley S Moore
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0204, USA.
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Widespread occurrence and lateral transfer of the cyanobactin biosynthesis gene cluster in cyanobacteria. Appl Environ Microbiol 2008; 75:853-7. [PMID: 19047393 DOI: 10.1128/aem.02134-08] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cyanobactins are small cyclic peptides produced by cyanobacteria. Here we demonstrate the widespread but sporadic occurrence of the cyanobactin biosynthetic pathway. We detected a cyanobactin biosynthetic gene in 48 of the 132 strains included in this study. Our results suggest that cyanobactin biosynthetic genes have a complex evolutionary history in cyanobacteria punctuated by a series of ancient horizontal gene transfer events.
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Moore B. Erweiterung des Biosyntheserepertoires in der ribosomalen Peptidsynthese. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Clark BR, Engene N, Teasdale ME, Rowley DC, Matainaho T, Valeriote FA, Gerwick WH. Natural products chemistry and taxonomy of the marine cyanobacterium Blennothrix cantharidosmum. JOURNAL OF NATURAL PRODUCTS 2008; 71:1530-1537. [PMID: 18698821 PMCID: PMC2657878 DOI: 10.1021/np800088a] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A Papua New Guinea field collection of the marine cyanobacterium Blennothrix cantharidosmum was investigated for its cytotoxic constituents. Bioassay-guided isolation defined the cytotoxic components as the known compounds lyngbyastatins 1 and 3. However, six new acyl proline derivatives, tumonoic acids D-I, plus the known tumonoic acid A were also isolated. Their planar structures were defined from NMR and MS data, while their stereostructures followed from a series of chiral chromatographies, degradation sequences, and synthetic approaches. The new compounds were tested in an array of assays, but showed only modest antimalarial and inhibition of quorum sensing activities. Nevertheless, these are the first natural products to be reported from this genus, and this inspired a detailed morphologic and 16S rDNA-based phylogenetic analysis of the producing organism.
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Affiliation(s)
- Benjamin R. Clark
- Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0212
| | - Niclas Engene
- Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0212
| | - Margaret E. Teasdale
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881
| | - David C. Rowley
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881
| | - Teatulohi Matainaho
- Discipline of Pharmacology, School of Medicine and Health Sciences, University of Papua New Guinea, National Capital District, Papua New Guinea
| | | | - William H. Gerwick
- Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0212
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0212
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Simmons TL, Engene N, Ureña LD, Romero LI, Ortega-Barría E, Gerwick L, Gerwick WH. Viridamides A and B, lipodepsipeptides with antiprotozoal activity from the marine cyanobacterium Oscillatoria nigro-viridis. JOURNAL OF NATURAL PRODUCTS 2008; 71:1544-50. [PMID: 18715036 PMCID: PMC2656441 DOI: 10.1021/np800110e] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Parallel chemical and phylogenetic investigation of a marine cyanobacterium from Panama led to the isolation of two new PKS-NRPS-derived compounds, viridamides A and B. Their structures were determined by NMR and mass spectroscopic methods, and the absolute configurations assigned by Marfey's method and chiral HPLC analysis. In addition to six standard, N-methylated amino and hydroxy acids, these metabolites contained the structurally novel 5-methoxydec-9-ynoic acid moiety and an unusual proline methyl ester terminus. Morphologically, this cyanobacterium was identified as Oscillatoria nigro-viridis, and its 16S rDNA sequence is reported here for the first time. Phylogenetic analysis of these sequence data has identified O. nigro-viridis strain OSC3L to be closely related to two other marine cyanobacterial genera, Trichodesmium and Blennothrix. Viridamide A showed antitrypanosomal activity with an IC50 of 1.1 microM and antileishmanial activity with an IC50 of 1.5 microM.
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Affiliation(s)
- Thomas L. Simmons
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093-0212
| | - Niclas Engene
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093-0212
| | - Luis David Ureña
- Institute for Advanced Scientific Investigation and High Technology Services, Secretariat of Science and Technology, Clayton, Ancon, Republic of Panama
| | - Luz I. Romero
- Institute for Advanced Scientific Investigation and High Technology Services, Secretariat of Science and Technology, Clayton, Ancon, Republic of Panama
| | - Eduardo Ortega-Barría
- Institute for Advanced Scientific Investigation and High Technology Services, Secretariat of Science and Technology, Clayton, Ancon, Republic of Panama
| | - Lena Gerwick
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093-0212
| | - William H. Gerwick
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093-0212
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Gunasekera SP, Ross C, Paul VJ, Matthew S, Luesch H. Dragonamides C and D, linear lipopeptides from the marine cyanobacterium brown Lyngbya polychroa. JOURNAL OF NATURAL PRODUCTS 2008; 71:887-890. [PMID: 18393465 DOI: 10.1021/np0706769] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Two new linear lipopeptides, 1 and 2, and a known compound, curacin D, have been isolated from a marine cyanobacterium, brown Lyngbya polychroa, collected from Hollywood Beach, Fort Lauderdale, Florida. Their planar structures were elucidated by 1D and 2D NMR techniques, and absolute configurations were assigned using chiral HPLC. The new compounds were assigned the trivial names dragonamide C (1) and dragonamide D (2), as their peptide moiety is related to previously reported dragonamides A and B.
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The marine lipopeptide somocystinamide A triggers apoptosis via caspase 8. Proc Natl Acad Sci U S A 2008; 105:2313-8. [PMID: 18268346 DOI: 10.1073/pnas.0712198105] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Screening for novel anticancer drugs in chemical libraries isolated from marine organisms, we identified the lipopeptide somocystinamide A (ScA) as a pluripotent inhibitor of angiogenesis and tumor cell proliferation. The antiproliferative activity was largely attributable to induction of programmed cell death. Sensitivity to ScA was significantly increased among cells expressing caspase 8, whereas siRNA knockdown of caspase 8 increased survival after exposure to ScA. ScA rapidly and efficiently partitioned into liposomes while retaining full antiproliferative activity. Consistent with the induction of apoptosis via the lipid compartment, we noted accumulation and aggregation of ceramide in treated cells and subsequent colocalization with caspase 8. Angiogenic endothelial cells were extremely sensitive to ScA. Picomolar concentrations of ScA disrupted proliferation and endothelial tubule formation in vitro. Systemic treatment of zebrafish or local treatment of the chick chorioallantoic membrane with ScA resulted in dose-dependent inhibition of angiogenesis, whereas topical treatment blocked tumor growth among caspase-8-expressing tumors. Together, the results reveal an unexpected mechanism of action for this unique lipopeptide and suggest future development of this and similar agents as antiangiogenesis and anticancer drugs.
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Ramaswamy AV, Sorrels CM, Gerwick WH. Cloning and biochemical characterization of the hectochlorin biosynthetic gene cluster from the marine cyanobacterium Lyngbya majuscula. JOURNAL OF NATURAL PRODUCTS 2007; 70:1977-1986. [PMID: 18001088 DOI: 10.1021/np0704250] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Cyanobacteria, or blue-green algae, are a rich source of novel bioactive secondary metabolites that have potential applications as antimicrobial or anticancer agents or useful probes in cell biology studies. A Jamaican collection of the cyanobacterium Lyngbya majuscula has yielded several unique compounds including hectochlorin ( 1) and the jamaicamides A-C ( 5- 7). Hectochlorin has remarkable antifungal and cytotoxic properties. In this study, we have isolated the hectochlorin biosynthetic gene cluster ( hct) from L. majuscula to obtain details regarding its biosynthesis at the molecular genetic level. The genetic architecture and domain organization appear to be colinear with respect to its biosynthesis and consists of eight open reading frames (ORFs) spanning 38 kb. An unusual feature of the cluster is the presence of ketoreductase (KR) domains in two peptide synthetase modules, which are predicted to be involved in the formation of the two 2,3-dihydroxyisovaleric acid (DHIV) units. This biosynthetic motif has only recently been described in cereulide, valinomycin, and cryptophycin biosynthesis, and hence, this is only the second such report of an embedded ketoreductase in a cyanobacterial secondary metabolite gene cluster. Also present at the downstream end of the cluster are two cytochrome P450 monooxygenases, which are likely involved in the formation of the DHIV units. A putative halogenase, at the beginning of the gene cluster, is predicted to form 5,5-dichlorohexanoic acid.
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