1
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Girão M, Freitas S, Martins TP, Urbatzka R, Carvalho MF, Leão PN. Decylprodigiosin: a new member of the prodigiosin family isolated from a seaweed-associated Streptomyces. Front Pharmacol 2024; 15:1347485. [PMID: 38576493 PMCID: PMC10991731 DOI: 10.3389/fphar.2024.1347485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 03/11/2024] [Indexed: 04/06/2024] Open
Abstract
Bioprospecting actinobacterial secondary metabolism from untapped marine sources may lead to the discovery of biotechnologically-relevant compounds. While studying the diversity and bioactive potential of Actinomycetota associated with Codium tomentosum, a green seaweed collected in the northern Portuguese cost, strain CT-F61, identified as Streptomyces violaceoruber, was isolated. Its extracts displayed a strong anticancer activity on breast carcinoma T-47D and colorectal carcinoma HCT116 cells, being effective as well against a panel of human and fish pathogenic bacteria. Following a bioactivity-guided isolation pipeline, a new analogue of the red-pigmented family of the antibiotics prodigiosins, decylprodigiosin (1), was identified and chemically characterized. Despite this family of natural products being well-known for a long time, we report a new analogue and the first evidence for prodigiosins being produced by a seaweed-associated actinomycete.
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Affiliation(s)
- Mariana Girão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
- School of Medicine and Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Sara Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
| | - Teresa P. Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
| | - Ralph Urbatzka
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
| | - Maria F. Carvalho
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
- School of Medicine and Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
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2
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Ribeiro I, Antunes JT, Alexandrino DAM, Tomasino MP, Almeida E, Hilário A, Urbatzka R, Leão PN, Mucha AP, Carvalho MF. Corrigendum: Actinobacteria from Arctic and Atlantic deep-sea sediments-Biodiversity and bioactive potential. Front Microbiol 2023; 14:1252355. [PMID: 37533819 PMCID: PMC10392926 DOI: 10.3389/fmicb.2023.1252355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 08/04/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fmicb.2023.1158441.].
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Affiliation(s)
- Inês Ribeiro
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal
| | - Jorge T. Antunes
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Diogo A. M. Alexandrino
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Environmental Health, School of Health, Polytechnic of Porto, Porto, Portugal
| | - Maria Paola Tomasino
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Eduarda Almeida
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Biology, FCUP - Faculty of Sciences of the University of Porto, Porto, Portugal
| | - Ana Hilário
- Centre for Environmental and Marine Studies and Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Ralph Urbatzka
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Pedro N. Leão
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Ana P. Mucha
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Biology, FCUP - Faculty of Sciences of the University of Porto, Porto, Portugal
| | - Maria F. Carvalho
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal
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3
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Kahn A, Oliveira P, Cuau M, Leão PN. Incorporation, fate and turnover of free fatty acids in cyanobacteria. FEMS Microbiol Rev 2023; 47:7120032. [PMID: 37061785 PMCID: PMC10114076 DOI: 10.1093/femsre/fuad015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/30/2023] [Accepted: 04/13/2023] [Indexed: 04/17/2023] Open
Abstract
Fatty acids are important molecules in bioenergetics and also in industry. The phylum Cyanobacteria consists of a group of prokaryotes that typically carry out oxygenic photosynthesis with water as an electron donor and use carbon dioxide as a carbon source to generate a range of biomolecules, including fatty acids. They are also able to import exogenous free fatty acids and direct them to biosynthetic pathways. Here, we review current knowledge on mechanisms and regulation of free fatty acid transport into cyanobacterial cells, their subsequent activation and use in the synthesis of fatty acid-containing biomolecules such as glycolipids and alka(e)nes, as well as recycling of free fatty acids derived from such molecules. This review also covers efforts in the engineering of such cyanobacterial fatty acid-associated pathways en route to optimized biofuel production.
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Affiliation(s)
- Amaranta Kahn
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
| | - Paulo Oliveira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Marine Cuau
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIIMAR), University of Porto, Matosinhos 4450-208, Portugal
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4
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Leão PN, Martins TP, Abt K, Reis JPA, Figueiredo S, Castelo-Branco R, Freitas S. Incorporation and modification of fatty acids in cyanobacterial natural products biosynthesis. Chem Commun (Camb) 2023; 59:4436-4446. [PMID: 36960756 PMCID: PMC10088813 DOI: 10.1039/d3cc00136a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Fatty acid-derived alkyl chains are often found in natural products, where they can exert a number of different functions, most notably biological membrane interactions. Such alkyl chains are difficult to modify regio- and stereoselectively, since most positions are distant from any directing functional group. Chemical and biochemical diversification of these moieties is therefore a challenge, and most organisms do not modify alkyl moieties to a great extent. Still, one particular group of microorgansims - cyanobacteria - display not only a large number of fatty acid-incorporating natural products, but also modify these to a great extent. Here, we provide an overview of the unique fatty acid metabolism of cyanobacteria in the context of natural products biosynthesis. We cover the diverse range of fatty acid incorporation mechanisms that these organisms use to recruit and commit fatty acids to natural products biosynthetic pathways. A variety of alkyl chain decorations and modifications that are found in cyanobacterial natural products are highlighted, illustrating the rich enzymatic arsenal that these organisms have evolved to diversify fatty acid-derived alkyl chains.
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Affiliation(s)
- Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
| | - Teresa P Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
- ICBAS - Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313 Porto, Portugal
| | - Kathleen Abt
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
- ICBAS - Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313 Porto, Portugal
| | - João P A Reis
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
- ICBAS - Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313 Porto, Portugal
| | - Sandra Figueiredo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Sara Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
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5
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Ribeiro I, Antunes JT, Alexandrino DAM, Tomasino MP, Almeida E, Hilário A, Urbatzka R, Leão PN, Mucha AP, Carvalho MF. Actinobacteria from Arctic and Atlantic deep-sea sediments-Biodiversity and bioactive potential. Front Microbiol 2023; 14:1158441. [PMID: 37065153 PMCID: PMC10100589 DOI: 10.3389/fmicb.2023.1158441] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/07/2023] [Indexed: 04/18/2023] Open
Abstract
The deep-sea covers over 70% of the Earth's surface and harbors predominantly uncharacterized bacterial communities. Actinobacteria are the major prokaryotic source of bioactive natural products that find their way into drug discovery programs, and the deep-sea is a promising source of biotechnologically relevant actinobacteria. Previous studies on actinobacteria in deep-sea sediments were either regionally restricted or did not combine a community characterization with the analysis of their bioactive potential. Here we characterized the actinobacterial communities of upper layers of deep-sea sediments from the Arctic and the Atlantic (Azores and Madeira) ocean basins, employing 16S rRNA metabarcoding, and studied the biosynthetic potential of cultivable actinobacteria retrieved from those samples. Metabarcoding analysis showed that the actinobacterial composition varied between the sampled regions, with higher abundance in the Arctic samples but higher diversity in the Atlantic ones. Twenty actinobacterial genera were detected using metabarcoding, as a culture-independent method, while culture-dependent methods only allowed the identification of nine genera. Isolation of actinobacteria resulted on the retrieval of 44 isolates, mainly associated with Brachybacterium, Microbacterium, and Brevibacterium genera. Some of these isolates were only identified on a specific sampled region. Chemical extracts of the actinobacterial isolates were subsequently screened for their antimicrobial, anticancer and anti-inflammatory activities. Extracts from two Streptomyces strains demonstrated activity against Candida albicans. Additionally, eight extracts (obtained from Brachybacterium, Brevibacterium, Microbacterium, Rhodococcus, and Streptomyces isolates) showed significant activity against at least one of the tested cancer cell lines (HepG2 and T-47D). Furthermore, 15 actinobacterial extracts showed anti-inflammatory potential in the RAW 264.4 cell model assay, with no concomitant cytotoxic response. Dereplication and molecular networking analysis of the bioactive actinobacterial extracts showed the presence of some metabolites associated with known natural products, but one of the analyzed clusters did not show any match with the natural products described as responsible for these bioactivities. Overall, we were able to recover taxonomically diverse actinobacteria with different bioactivities from the studied deep-sea samples. The conjugation of culture-dependent and -independent methods allows a better understanding of the actinobacterial diversity of deep-sea environments, which is important for the optimization of approaches to obtain novel chemically-rich isolates.
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Affiliation(s)
- Inês Ribeiro
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal
- *Correspondence: Inês Ribeiro,
| | - Jorge T. Antunes
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Diogo A. M. Alexandrino
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Environmental Health, School of Health, Polytechnic of Porto, Porto, Portugal
| | - Maria Paola Tomasino
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Eduarda Almeida
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Biology, FCUP - Faculty of Sciences of the University of Porto, Porto, Portugal
| | - Ana Hilário
- Centre for Environmental and Marine Studies and Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Ralph Urbatzka
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Pedro N. Leão
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Ana P. Mucha
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Biology, FCUP - Faculty of Sciences of the University of Porto, Porto, Portugal
| | - Maria F. Carvalho
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- School of Medicine and Biomedical Sciences (ICBAS), University of Porto, Porto, Portugal
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6
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Eusébio N, Castelo-Branco R, Sousa D, Preto M, D’Agostino P, Gulder TAM, Leão PN. Discovery and Heterologous Expression of Microginins from Microcystis aeruginosa LEGE 91341. ACS Synth Biol 2022; 11:3493-3503. [PMID: 36166626 PMCID: PMC9594780 DOI: 10.1021/acssynbio.2c00389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Microginins are a large family of cyanobacterial lipopeptide protease inhibitors. A hybrid polyketide synthase/non-ribosomal peptide synthetase biosynthetic gene cluster (BGC) found in several microginin-producing strains─mic─was proposed to encode the production of microginins, based on bioinformatic analysis. Here, we explored a cyanobacterium, Microcystis aeruginosa LEGE 91341, which contains a mic BGC, to discover 12 new microginin variants. The new compounds contain uncommon amino acids, namely, homophenylalanine (Hphe), homotyrosine (Htyr), or methylproline, as well as a 3-aminodecanoic acid (Ada) residue, which in some variants was chlorinated at its terminal methyl group. We have used direct pathway cloning (DiPaC) to heterologously express the mic BGC from M. aeruginosa LEGE 91341 in Escherichia coli, which led to the production of several microginins. This proved that the mic BGC is, in fact, responsible for the biosynthesis of microginins and paves the way to accessing new variants from (meta)genome data or through pathway engineering.
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Affiliation(s)
- Nádia Eusébio
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Diana Sousa
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Marco Preto
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Paul D’Agostino
- Chair
of Technical Biochemistry, Technical University
of Dresden, Bergstraße
66, 01069 Dresden, Germany
| | - Tobias A. M. Gulder
- Chair
of Technical Biochemistry, Technical University
of Dresden, Bergstraße
66, 01069 Dresden, Germany
| | - Pedro N. Leão
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal,
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7
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Hentschke GS, Ramos V, Pinheiro Â, Barreiro A, Costa MS, Rego A, Brule S, Vasconcelos VM, Leão PN. Zarconia navalis gen. nov., sp. nov., Romeriopsis navalis gen. nov., sp. nov. and Romeriopsis marina sp. nov., isolated from inter- and subtidal environments from northern Portugal. Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The morphology, 16S rRNA gene phylogeny and 16S–23S rRNA gene ITS secondary structures of three strains of marine Cyanobacteria, isolated from inter- and subtidal environments from north Portugal were studied, resulting in the description of Zarconia navalis gen. nov., sp. nov. (Oscillatoriales incertae sedis), Romeriopsis navalis gen. nov., sp. nov. (Leptolyngbyaceae) and Romeriopsis marina sp. nov., named under the International Code of Nomenclature for algae, fungi, and plants. No diacritical morphological characters were found for the new genera and species. The 16S rRNA gene maximum-likelihood and Bayesian phylogenies supported that the genus Zarconia is a member of the Oscillatoriales, morphologically similar to the genera
Microcoleus
and Phormidium, but distant from them. The genus Romeriopsis is positioned within the Leptolyngbyaceae (Synechococcales) and is closely related to
Alkalinema
. The secondary structures of the D1-D1′, Box B, V2 and V3 helices corroborate the phylogenetic results. Furthermore, our study supports previous observations of polyphyletic Oscillatoriales families and reinforces the need for their taxonomic revision.
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Affiliation(s)
- Guilherme S. Hentschke
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Vitor Ramos
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Ângela Pinheiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Aldo Barreiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - M. Sofia Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Adriana Rego
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Sébastien Brule
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Vitor M. Vasconcelos
- Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Av. General Norton de Matos, 4450-208, Matosinhos, Portugal
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8
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Martins T, Glasser NR, Kountz DJ, Oliveira P, Balskus EP, Leão PN. Biosynthesis of the Unusual Carbon Skeleton of Nocuolin A. ACS Chem Biol 2022; 17:2528-2537. [PMID: 36044983 PMCID: PMC9486936 DOI: 10.1021/acschembio.2c00464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/15/2022] [Indexed: 11/28/2022]
Abstract
Nocuolin A is a cytotoxic cyanobacterial metabolite that is proposed to be produced by enzymes of the noc biosynthetic gene cluster. Nocuolin A features a 1,2,3-oxadiazine moiety, a structural feature unique among natural products and, so far, inaccessible through organic synthesis, suggesting that novel enzymatic chemistry might be involved in its biosynthesis. This heterocycle is substituted with two alkyl chains and a 3-hydroxypropanoyl moiety. We report here our efforts to elucidate the origin of the carbon skeleton of nocuolin A. Supplementation of cyanobacterial cultures with stable isotope-labeled fatty acids revealed that the central C13 chain is assembled from two medium-chain fatty acids, hexanoic and octanoic acids. Using biochemical assays, we show that a fatty acyl-AMP ligase, NocH, activates both fatty acids as acyl adenylates, which are loaded onto an acyl carrier protein domain and undergo a nondecarboxylative Claisen condensation catalyzed by the ketosynthase NocG. This enzyme is part of a phylogenetically well-defined clade within similar genomic contexts. NocG presents a unique combination of characteristics found in other ketosynthases, namely in terms of substrate specificity and reactivity. Further supplementation experiments indicate that the 3-hydroxypropanoyl moiety of 1 originates from methionine, through an as-yet-uncharacterized mechanism. This work provides ample biochemical evidence connecting the putative noc biosynthetic gene cluster to nocuolin A and identifies the origin of all its carbon atoms, setting the stage for elucidation of its unusual biosynthetic chemistry.
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Affiliation(s)
- Teresa
P. Martins
- CIIMAR
− Interdisciplinary Centre of Marine and Environmental Research, University of Porto, 4450-208 Matosinhos, Portugal
- ICBAS
− Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313 Porto, Portugal
| | - Nathaniel R. Glasser
- Department
of Chemistry and Chemical Biology, Harvard
University, Cambridge, Massachusetts 02138, United States
| | - Duncan J. Kountz
- Department
of Chemistry and Chemical Biology, Harvard
University, Cambridge, Massachusetts 02138, United States
| | - Paulo Oliveira
- i3S
− Institute for Research and Innovation in Health, University of Porto, 4200-135 Porto, Portugal
- IBMC
− Institute of Molecular and Cell Biology, University of Porto, 4200-135 Porto, Portugal
- Department
of Biology, Faculty of Sciences, University
of Porto, 4169-00 Porto, Portugal
| | - Emily P. Balskus
- Department
of Chemistry and Chemical Biology, Harvard
University, Cambridge, Massachusetts 02138, United States
| | - Pedro N. Leão
- CIIMAR
− Interdisciplinary Centre of Marine and Environmental Research, University of Porto, 4450-208 Matosinhos, Portugal
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9
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Freitas S, Castelo-Branco R, Wenzel-Storjohann A, Vasconcelos VM, Tasdemir D, Leão PN. Structure and Biosynthesis of Desmamides A-C, Lipoglycopeptides from the Endophytic Cyanobacterium Desmonostoc muscorum LEGE 12446. J Nat Prod 2022; 85:1704-1714. [PMID: 35793792 PMCID: PMC9315949 DOI: 10.1021/acs.jnatprod.2c00162] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Certain cyanobacteria of the secondary metabolite-rich order Nostocales can establish permanent symbioses with a large number of cycads, by accumulating in their coralloid roots and shifting their metabolism to dinitrogen fixation. Here, we report the discovery of two new lipoglycopeptides, desmamides A (1) and B (2), together with their aglycone desmamide C (3), from the nostocalean cyanobacterium Desmonostoc muscorum LEGE 12446 isolated from a cycad (Cycas revoluta) coralloid root. The chemical structures of the compounds were elucidated using a combination of 1D and 2D NMR spectroscopy and mass spectrometry. The desmamides are decapeptides featuring O-glycosylation of tyrosine (in 1 and 2) and an unusual 3,5-dihydroxy-2-methyldecanoic acid residue. The biosynthesis of the desmamides was studied by substrate incubation experiments and bioinformatics. We describe herein the dsm biosynthetic gene cluster and propose it to be associated with desmamide production. The discovery of this class of very abundant (>1.5% d.w.) bacterial lipoglycopeptides paves the way for exploration of their potential role in root endosymbiosis.
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Affiliation(s)
- Sara Freitas
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
- Department
of Biology, Faculty of Sciences, University
of Porto Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Arlette Wenzel-Storjohann
- GEOMAR
Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Product Chemistry, GEOMAR Helmholtz
Centre for Ocean Research Kiel, Am Kiel Kanal 44, 24106 Kiel, Germany
| | - Vitor M. Vasconcelos
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
- Department
of Biology, Faculty of Sciences, University
of Porto Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Deniz Tasdemir
- GEOMAR
Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Product Chemistry, GEOMAR Helmholtz
Centre for Ocean Research Kiel, Am Kiel Kanal 44, 24106 Kiel, Germany
- Kiel
University, Christian-Albrechts-Platz
4, 24118 Kiel, Germany
| | - Pedro N. Leão
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
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10
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Abstract
Polyketide synthases (PKSs) and non-ribosomal peptide synthetases (NRPSs) are mega enzymes responsible for the biosynthesis of a large fraction of natural products (NPs). Molecular markers for biosynthetic genes, such as the ketosynthase (KS) domain of PKSs, have been used to assess the diversity and distribution of biosynthetic genes in complex microbial communities. More recently, metagenomic studies have complemented and enhanced this approach by allowing the recovery of complete biosynthetic gene clusters (BGCs) from environmental DNA. In this study, the distribution and diversity of biosynthetic genes and clusters from Arctic Ocean samples (NICE-2015 expedition), was assessed using PCR-based strategies coupled with high-throughput sequencing and metagenomic analysis. In total, 149 KS domain OTU sequences were recovered, 36 % of which could not be assigned to any known BGC. In addition, 74 bacterial metagenome-assembled genomes were recovered, from which 179 BGCs were extracted. A network analysis identified potential new NP families, including non-ribosomal peptides and polyketides. Complete or near-complete BGCs were recovered, which will enable future heterologous expression efforts to uncover the respective NPs. Our study represents the first report of biosynthetic diversity assessed for Arctic Ocean metagenomes and highlights the potential of Arctic Ocean planktonic microbiomes for the discovery of novel secondary metabolites. The strategy employed in this study will enable future bioprospection, by identifying promising samples for bacterial isolation efforts, while providing also full-length BGCs for heterologous expression.
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Affiliation(s)
- Adriana Rego
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal
| | - Antonio Fernandez-Guerra
- Lundbeck Foundation GeoGenetics Centre, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
| | - Pedro Duarte
- Norwegian Polar Institute, Fram Centre, N-9296 Tromsø, Norway
| | - Philipp Assmy
- Norwegian Polar Institute, Fram Centre, N-9296 Tromsø, Norway
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
- *Correspondence: Pedro N. Leão,
| | - Catarina Magalhães
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Matosinhos, Portugal
- Faculty of Sciences, University of Porto, 4150-179 Porto, Portugal
- *Correspondence: Catarina Magalhães,
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11
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Eusebio N, Rego A, Glasser NR, Castelo-Branco R, Balskus EP, Leão PN. Distribution and diversity of dimetal-carboxylate halogenases in cyanobacteria. BMC Genomics 2021; 22:633. [PMID: 34461836 PMCID: PMC8406957 DOI: 10.1186/s12864-021-07939-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/14/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Halogenation is a recurring feature in natural products, especially those from marine organisms. The selectivity with which halogenating enzymes act on their substrates renders halogenases interesting targets for biocatalyst development. Recently, CylC - the first predicted dimetal-carboxylate halogenase to be characterized - was shown to regio- and stereoselectively install a chlorine atom onto an unactivated carbon center during cylindrocyclophane biosynthesis. Homologs of CylC are also found in other characterized cyanobacterial secondary metabolite biosynthetic gene clusters. Due to its novelty in biological catalysis, selectivity and ability to perform C-H activation, this halogenase class is of considerable fundamental and applied interest. The study of CylC-like enzymes will provide insights into substrate scope, mechanism and catalytic partners, and will also enable engineering these biocatalysts for similar or additional C-H activating functions. Still, little is known regarding the diversity and distribution of these enzymes. RESULTS In this study, we used both genome mining and PCR-based screening to explore the genetic diversity of CylC homologs and their distribution in bacteria. While we found non-cyanobacterial homologs of these enzymes to be rare, we identified a large number of genes encoding CylC-like enzymes in publicly available cyanobacterial genomes and in our in-house culture collection of cyanobacteria. Genes encoding CylC homologs are widely distributed throughout the cyanobacterial tree of life, within biosynthetic gene clusters of distinct architectures (combination of unique gene groups). These enzymes are found in a variety of biosynthetic contexts, which include fatty-acid activating enzymes, type I or type III polyketide synthases, dialkylresorcinol-generating enzymes, monooxygenases or Rieske proteins. Our study also reveals that dimetal-carboxylate halogenases are among the most abundant types of halogenating enzymes in the phylum Cyanobacteria. CONCLUSIONS Our data show that dimetal-carboxylate halogenases are widely distributed throughout the Cyanobacteria phylum and that BGCs encoding CylC homologs are diverse and mostly uncharacterized. This work will help guide the search for new halogenating biocatalysts and natural product scaffolds.
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Affiliation(s)
- Nadia Eusebio
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
| | - Adriana Rego
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
| | - Nathaniel R Glasser
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
| | - Emily P Balskus
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal.
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12
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Figueiredo SAC, Preto M, Moreira G, Martins TP, Abt K, Melo A, Vasconcelos VM, Leão PN. Discovery of Cyanobacterial Natural Products Containing Fatty Acid Residues**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sandra A. C. Figueiredo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
| | - Marco Preto
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
| | - Gabriela Moreira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
| | - Teresa P. Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS) University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Kathleen Abt
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS) University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - André Melo
- LAQV@REQUIMTE/Department of Chemistry and Biochemistry Faculty of Sciences University of Porto Rua do Campo Alegre 4169-007 Porto Portugal
| | - Vitor M. Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
- Department of Biology Faculty of Sciences University of Porto Rua do Campo Alegre 4169-007 Porto Portugal
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) University of Porto Avenida General Norton de Matos, s/n 4450-208 Matosinhos Portugal
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13
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Figueiredo SAC, Preto M, Moreira G, Martins TP, Abt K, Melo A, Vasconcelos VM, Leão PN. Discovery of Cyanobacterial Natural Products Containing Fatty Acid Residues*. Angew Chem Int Ed Engl 2021; 60:10064-10072. [PMID: 33599093 PMCID: PMC8252387 DOI: 10.1002/anie.202015105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Indexed: 12/16/2022]
Abstract
In recent years, extensive sequencing and annotation of bacterial genomes has revealed an unexpectedly large number of secondary metabolite biosynthetic gene clusters whose products are yet to be discovered. For example, cyanobacterial genomes contain a variety of gene clusters that likely incorporate fatty acid derived moieties, but for most cases we lack the knowledge and tools to effectively predict or detect the encoded natural products. Here, we exploit the apparent absence of a functional β-oxidation pathway in cyanobacteria to achieve efficient stable-isotope-labeling of their fatty acid derived lipidome. We show that supplementation of cyanobacterial cultures with deuterated fatty acids can be used to easily detect natural product signatures in individual strains. The utility of this strategy is demonstrated in two cultured cyanobacteria by uncovering analogues of the multidrug-resistance reverting hapalosin, and novel, cytotoxic, lactylate-nocuolin A hybrids-the nocuolactylates.
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Affiliation(s)
- Sandra A. C. Figueiredo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
| | - Marco Preto
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
| | - Gabriela Moreira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
| | - Teresa P. Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS)University of PortoRua de Jorge Viterbo Ferreira, 2284050-313PortoPortugal
| | - Kathleen Abt
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS)University of PortoRua de Jorge Viterbo Ferreira, 2284050-313PortoPortugal
| | - André Melo
- LAQV@REQUIMTE/Department of Chemistry and BiochemistryFaculty of SciencesUniversity of PortoRua do Campo Alegre4169-007PortoPortugal
| | - Vitor M. Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
- Department of BiologyFaculty of SciencesUniversity of PortoRua do Campo Alegre4169-007PortoPortugal
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)University of PortoAvenida General Norton de Matos, s/n4450-208MatosinhosPortugal
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14
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Abstract
Lactylates are an important group of molecules in the food and cosmetic industries. A series of natural halogenated 1-lactylates, chlorosphaerolactylates (1-4), were recently reported from Sphaerospermopsis sp. LEGE 00249. Here, we identify the cly biosynthetic gene cluster, containing all the necessary functionalities for the biosynthesis of the natural lactylates, based on in silico analyses. Using a combination of stable isotope incorporation experiments and bioinformatic analysis, we propose that dodecanoic acid and pyruvate are the key building blocks in the biosynthesis of 1-4. We additionally report minor analogues of these molecules with varying alkyl chains. This work paves the way to accessing industrially relevant lactylates through pathway engineering.
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Affiliation(s)
- Kathleen Abt
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
- Institute
of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
| | - Pedro N. Leão
- Interdisciplinary
Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208 Matosinhos, Portugal
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15
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Antunes JT, Sousa AGG, Azevedo J, Rego A, Leão PN, Vasconcelos V. Distinct Temporal Succession of Bacterial Communities in Early Marine Biofilms in a Portuguese Atlantic Port. Front Microbiol 2020; 11:1938. [PMID: 32849482 PMCID: PMC7432428 DOI: 10.3389/fmicb.2020.01938] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 07/22/2020] [Indexed: 12/13/2022] Open
Abstract
Marine biofilms are known to influence the corrosion of metal surfaces in the marine environment. Despite some recent research, the succession of bacterial communities colonizing artificial surfaces remains uncharacterized in some temporal settings. More specifically, it is not fully known if bacterial colonizers of artificial surfaces are similar or distinct in the different seasons of the year. In particular the study of early biofilms, in which the bacterial cells communities first adhere to artificial surfaces, are crucial for the development of the subsequent biofilm communities. In this work, we used amplicon-based NGS (next-generation sequencing) and universal 16S rRNA bacterial primers to characterize the early biofilm bacterial communities growing on 316 L stainless steel surfaces in a Northern Portugal port. Sampling spanned 30-day periods in two distinct seasons (spring and winter). Biofilm communities growing in steel surfaces covered with an anti-corrosion paint and planktonic communities from the same location were also characterized. Our results demonstrated that distinct temporal patterns were observed in the sampled seasons. Specifically, a significantly higher abundance of Gammaproteobacteria and Mollicutes was found on the first days of biofilm growth in spring (day 1 to day 4) and a higher abundance of Alphaproteobacteria during the same days of biofilm growth in winter. In the last sampled day (day 30), the spring biofilms significantly shifted toward a dominance of photoautotrophic groups (mostly diatoms) and were also colonized by some macrofouling communities, something not observed during the winter sampling. Our results revealed that bacterial composition in the biofilms was particularly affected by the sampled day of the specific season, more so than the overall effect of the season or overall sampling day of both seasons. Additionally, the application of a non-fouling-release anti-corrosion paint in the steel plates resulted in a significantly lower diversity compared with plates without paint, but this was only observed during spring. We suggest that temporal succession of marine biofilm communities should be taken in consideration for future antifouling/anti-biofilm applications.
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Affiliation(s)
- Jorge T. Antunes
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - António G. G. Sousa
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
| | - Joana Azevedo
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
| | - Adriana Rego
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Pedro N. Leão
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
| | - Vitor Vasconcelos
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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16
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Azevedo J, Antunes JT, Machado AM, Vasconcelos V, Leão PN, Froufe E. Monitoring of biofouling communities in a Portuguese port using a combined morphological and metabarcoding approach. Sci Rep 2020; 10:13461. [PMID: 32778680 PMCID: PMC7417558 DOI: 10.1038/s41598-020-70307-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 06/15/2020] [Indexed: 01/01/2023] Open
Abstract
Marine biofouling remains an unsolved problem with a serious economic impact on several marine associated industries and constitutes a major vector for the spread of non-indigenous species (NIS). The implementation of biofouling monitoring programs allows for better fouling management and also for the early identification of NIS. However, few monitoring studies have used recent methods, such as metabarcoding, that can significantly enhance the detection of those species. Here, we employed monthly monitoring of biofouling growth on stainless steel plates in the Atlantic Port of Leixões (Northern Portugal), over one year to test the effect of commercial anti-corrosion paint in the communities. Fouling organisms were identified by combining morpho-taxonomy identification with community DNA metabarcoding using multiple markers (16S rRNA, 18S rRNA, 23S rRNA, and COI genes). The dominant colonizers found at this location were hard foulers, namely barnacles and mussels, while other groups of organisms such as cnidarians, bryozoans, and ascidians were also abundant. Regarding the temporal dynamics of the fouling communities, there was a progressive increase in the colonization of cyanobacteria, green algae, and red algae during the sampled period with the replacement of less abundant groups. The tested anticorrosion paint demonstrated to have a significant prevention effect against the biofouling community resulting in a biomass reduction. Our study also reports, for the first time, 29 NIS in this port, substantiating the need for the implementation of recurring biofouling monitoring programs in ports and harbours.
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Affiliation(s)
- Joana Azevedo
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal.,Faculty of Sciences, University of Porto, Porto, Portugal
| | - Jorge T Antunes
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal.,Faculty of Sciences, University of Porto, Porto, Portugal
| | - André M Machado
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal.,Faculty of Sciences, University of Porto, Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal.
| | - Elsa Froufe
- Interdisciplinary Centre of Marine and Environmental Research, CIIMAR/CIMAR, Matosinhos, Portugal.
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17
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Brito Â, Vieira J, Vieira CP, Zhu T, Leão PN, Ramos V, Lu X, Vasconcelos VM, Gugger M, Tamagnini P. Comparative Genomics Discloses the Uniqueness and the Biosynthetic Potential of the Marine Cyanobacterium Hyella patelloides. Front Microbiol 2020; 11:1527. [PMID: 32774329 PMCID: PMC7381351 DOI: 10.3389/fmicb.2020.01527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 06/12/2020] [Indexed: 11/16/2022] Open
Abstract
Baeocytous cyanobacteria (Pleurocapsales/Subsection II) can thrive in a wide range of habitats on Earth but, compared to other cyanobacterial lineages, they remain poorly studied at genomic level. In this study, we sequenced the first genome from a member of the Hyella genus - H. patelloides LEGE 07179, a recently described species isolated from the Portuguese foreshore. This genome is the largest of the thirteen baeocyte-forming cyanobacterial genomes sequenced so far, and diverges from the most closely related strains. Comparative analysis revealed strain-specific genes and horizontal gene transfer events between H. patelloides and its closest relatives. Moreover, H. patelloides genome is distinctive by the number and diversity of natural product biosynthetic gene clusters (BGCs). The majority of these clusters are strain-specific BGCs with a high probability of synthesizing novel natural products. One BGC was identified as being putatively involved in the production of terminal olefin. Our results showed that, H. patelloides produces hydrocarbon with C15 chain length, and synthesizes C14, C16, and C18 fatty acids exceeding 4% of the dry cell weight. Overall, our data contributed to increase the information on baeocytous cyanobacteria, and shed light on H. patelloides evolution, phylogeny and natural product biosynthetic potential.
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Affiliation(s)
- Ângela Brito
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Jorge Vieira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Cristina P Vieira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Tao Zhu
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
| | - Vitor Ramos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
| | - Xuefeng Lu
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Vitor M Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Matosinhos, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Muriel Gugger
- Institut Pasteur, Collection des Cyanobactéries, Paris, France
| | - Paula Tamagnini
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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18
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Reis JPA, Figueiredo SAC, Sousa ML, Leão PN. BrtB is an O-alkylating enzyme that generates fatty acid-bartoloside esters. Nat Commun 2020; 11:1458. [PMID: 32193394 PMCID: PMC7081238 DOI: 10.1038/s41467-020-15302-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 03/02/2020] [Indexed: 11/17/2022] Open
Abstract
Esterification reactions are central to many aspects of industrial and biological chemistry. The formation of carboxyesters typically occurs through nucleophilic attack of an alcohol onto the carboxylate carbon. Under certain conditions employed in organic synthesis, the carboxylate nucleophile can be alkylated to generate esters from alkyl halides, but this reaction has only been observed transiently in enzymatic chemistry. Here, we report a carboxylate alkylating enzyme – BrtB – that catalyzes O-C bond formation between free fatty acids of varying chain length and the secondary alkyl halide moieties found in the bartolosides. Guided by this reactivity, we uncovered a variety of natural fatty acid-bartoloside esters, previously unrecognized products of the bartoloside biosynthetic gene cluster. O-alkylation of carboxylates by alkyl halides has only been observed transiently in enzymatic processes. Here, the authors show a carboxylate alkylating enzyme, BrtB, that catalyzes C-O bond formation between free fatty acids and secondary alkyl chlorides.
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Affiliation(s)
- João P A Reis
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Sandra A C Figueiredo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Maria Lígia Sousa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal.
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19
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Rego A, Sousa AGG, Santos JP, Pascoal F, Canário J, Leão PN, Magalhães C. Diversity of Bacterial Biosynthetic Genes in Maritime Antarctica. Microorganisms 2020; 8:microorganisms8020279. [PMID: 32085500 PMCID: PMC7074882 DOI: 10.3390/microorganisms8020279] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/14/2020] [Accepted: 02/14/2020] [Indexed: 02/06/2023] Open
Abstract
Bacterial natural products (NPs) are still a major source of new drug leads. Polyketides (PKs) and non-ribosomal peptides (NRP) are two pharmaceutically important families of NPs and recent studies have revealed Antarctica to harbor endemic polyketide synthase (PKS) and non-ribosomal peptide synthetase (NRPS) genes, likely to be involved in the production of novel metabolites. Despite this, the diversity of secondary metabolites genes in Antarctica is still poorly explored. In this study, a computational bioprospection approach was employed to study the diversity and identity of PKS and NRPS genes to one of the most biodiverse areas in maritime Antarctica—Maxwell Bay. Amplicon sequencing of soil samples targeting ketosynthase (KS) and adenylation (AD) domains of PKS and NRPS genes, respectively, revealed abundant and unexplored chemical diversity in this peninsula. About 20% of AD domain sequences were only distantly related to characterized biosynthetic genes. Several PKS and NRPS genes were found to be closely associated to recently described metabolites including those from uncultured and candidate phyla. The combination of new approaches in computational biology and new culture-dependent and -independent strategies is thus critical for the recovery of the potential novel chemistry encoded in Antarctica microorganisms.
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Affiliation(s)
- Adriana Rego
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal
| | - António G. G. Sousa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
| | - João P. Santos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
- Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66, Boulevard Carl-Vogt, 1211 Genève 4, Switzerland
| | - Francisco Pascoal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
| | - João Canário
- Centro de Química Estrutural at Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
- Correspondence: (P.N.L); (C.M.)
| | - Catarina Magalhães
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal; (A.R.); (A.G.G.S.); (J.P.S.); (F.P.)
- Faculty of Sciences, University of Porto, 4150-179 Porto, Portugal
- School of Science, University of Waikato, Hamilton 3216, New Zealand
- Correspondence: (P.N.L); (C.M.)
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20
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Martins TP, Ramos V, Hentschke GS, Castelo-Branco R, Rego A, Monteiro M, Brito Â, Tamagnini P, Cary SC, Vasconcelos V, Krienitz L, Magalhães C, Leão PN. The Extremophile Endolithella mcmurdoensis gen. et sp. nov. (Trebouxiophyceae, Chlorellaceae), A New Chlorella-like Endolithic Alga From Antarctica. J Phycol 2020; 56:208-216. [PMID: 31643075 DOI: 10.1111/jpy.12940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/20/2019] [Indexed: 06/10/2023]
Abstract
The McMurdo Dry Valleys constitute the largest ice-free region of Antarctica and one of the most extreme deserts on Earth. Despite the low temperatures, dry and poor soils and katabatic winds, some microbes are able to take advantage of endolithic microenvironments, inhabiting the pore spaces of soil and constituting photosynthesis-based communities. We isolated a green microalga, Endolithella mcmurdoensis gen. et sp. nov, from an endolithic sandstone sample collected in the McMurdo Dry Valleys (Victoria Land, East Antarctica) during the K020 expedition, in January 2013. The single non-axenic isolate (E. mcmurdoensis LEGE Z-009) exhibits cup-shaped chloroplasts, electron-dense bodies, and polyphosphate granules but our analysis did not reveal any diagnostic morphological characters. On the basis of phylogenetic analysis of the 18S rRNA (SSU) gene, the isolate was found to represent a new genus within the family Chlorellaceae.
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Affiliation(s)
- Teresa P Martins
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Vitor Ramos
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Guilherme S Hentschke
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Raquel Castelo-Branco
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Adriana Rego
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Maria Monteiro
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- School of Science, University of Waikato, Hamilton, New Zealand
| | - Ângela Brito
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
| | - Paula Tamagnini
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - S Craig Cary
- School of Science, University of Waikato, Hamilton, New Zealand
- International Centre for Terrestrial Antarctic Research, University of Waikato, Hamilton, New Zealand
| | - Vitor Vasconcelos
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - Lothar Krienitz
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, D-16775, Stechlin, Germany
| | - Catarina Magalhães
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - Pedro N Leão
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
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21
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Martins TP, Rouger C, Glasser NR, Freitas S, de Fraissinette NB, Balskus EP, Tasdemir D, Leão PN. Chemistry, bioactivity and biosynthesis of cyanobacterial alkylresorcinols. Nat Prod Rep 2019; 36:1437-1461. [PMID: 30702733 PMCID: PMC6836626 DOI: 10.1039/c8np00080h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Indexed: 12/18/2022]
Abstract
Covering: up to 2019 Alkylresorcinols are amphiphilic metabolites, well-known for their diverse biological activities, produced by both prokaryotes and eukaryotes. A few classes of alkylresorcinol scaffolds have been reported from the photoautotrophic cyanobacteria, ranging from the relatively simple hierridins to the more intricate cylindrocyclophanes. Recently, it has emerged that cyanobacteria employ two different biosynthetic pathways to produce unique alkylresorcinol scaffolds. However, these convergent pathways intersect by sharing biosynthetic elements which lead to common structural motifs. To obtain a broader view of the biochemical diversity of these compounds in cyanobacteria, we comprehensively cover the isolation, structure, biological activity and biosynthesis of their mono- and dialkylresorcinols. Moreover, we provide an overview of the diversity and distribution of alkylresorcinol-generating biosynthetic gene clusters in this phylum and highlight opportunities for discovery of novel alkylresorcinol scaffolds. Because some of these molecules have inspired notable syntheses, different approaches used to build these molecules in the laboratory are showcased.
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Affiliation(s)
- Teresa P. Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)
, University of Porto
,
Matosinhos
, Portugal
.
| | - Caroline Rouger
- Research Unit Marine Natural Products Chemistry
, GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech)
, GEOMAR Helmholtz Centre for Ocean Research Kiel
,
Germany
| | - Nathaniel R. Glasser
- Department of Chemistry & Chemical Biology
, Harvard University
,
Cambridge
, MA
, USA
| | - Sara Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)
, University of Porto
,
Matosinhos
, Portugal
.
| | - Nelly B. de Fraissinette
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)
, University of Porto
,
Matosinhos
, Portugal
.
| | - Emily P. Balskus
- Department of Chemistry & Chemical Biology
, Harvard University
,
Cambridge
, MA
, USA
| | - Deniz Tasdemir
- Research Unit Marine Natural Products Chemistry
, GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech)
, GEOMAR Helmholtz Centre for Ocean Research Kiel
,
Germany
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR)
, University of Porto
,
Matosinhos
, Portugal
.
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22
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Rego A, Raio F, Martins TP, Ribeiro H, Sousa AGG, Séneca J, Baptista MS, Lee CK, Cary SC, Ramos V, Carvalho MF, Leão PN, Magalhães C. Actinobacteria and Cyanobacteria Diversity in Terrestrial Antarctic Microenvironments Evaluated by Culture-Dependent and Independent Methods. Front Microbiol 2019; 10:1018. [PMID: 31214128 PMCID: PMC6555387 DOI: 10.3389/fmicb.2019.01018] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 04/24/2019] [Indexed: 12/13/2022] Open
Abstract
Bacterial diversity from McMurdo Dry Valleys in Antarctica, the coldest desert on earth, has become more easily assessed with the development of High Throughput Sequencing (HTS) techniques. However, some of the diversity remains inaccessible by the power of sequencing. In this study, we combine cultivation and HTS techniques to survey actinobacteria and cyanobacteria diversity along different soil and endolithic micro-environments of Victoria Valley in McMurdo Dry Valleys. Our results demonstrate that the Dry Valleys actinobacteria and cyanobacteria distribution is driven by environmental forces, in particular the effect of water availability and endolithic environments clearly conditioned the distribution of those communities. Data derived from HTS show that the percentage of cyanobacteria decreases from about 20% in the sample closest to the water source to negligible values on the last three samples of the transect with less water availability. Inversely, actinobacteria relative abundance increases from about 20% in wet soils to over 50% in the driest samples. Over 30% of the total HTS data set was composed of actinobacterial strains, mainly distributed by 5 families: Sporichthyaceae, Euzebyaceae, Patulibacteraceae, Nocardioidaceae, and Rubrobacteraceae. However, the 11 actinobacterial strains isolated in this study, belonged to Micrococcaceae and Dermacoccaceae families that were underrepresented in the HTS data set. A total of 10 cyanobacterial strains from the order Synechococcales were also isolated, distributed by 4 different genera (Nodosilinea, Leptolyngbya, Pectolyngbya, and Acaryochloris-like). In agreement with the cultivation results, Leptolyngbya was identified as dominant genus in the HTS data set. Acaryochloris-like cyanobacteria were found exclusively in the endolithic sample and represented 44% of the total 16S rRNA sequences, although despite our efforts we were not able to properly isolate any strain from this Acaryochloris-related group. The importance of combining cultivation and sequencing techniques is highlighted, as we have shown that culture-dependent methods employed in this study were able to retrieve actinobacteria and cyanobacteria taxa that were not detected in HTS data set, suggesting that the combination of both strategies can be usefull to recover both abundant and rare members of the communities.
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Affiliation(s)
- Adriana Rego
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Francisco Raio
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Teresa P Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Hugo Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - António G G Sousa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Joana Séneca
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Mafalda S Baptista
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal.,International Centre for Terrestrial Antarctic Research, University of Waikato, Hamilton, New Zealand
| | - Charles K Lee
- International Centre for Terrestrial Antarctic Research, University of Waikato, Hamilton, New Zealand.,School of Science, University of Waikato, Hamilton, New Zealand
| | - S Craig Cary
- International Centre for Terrestrial Antarctic Research, University of Waikato, Hamilton, New Zealand.,School of Science, University of Waikato, Hamilton, New Zealand
| | - Vitor Ramos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Maria F Carvalho
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Catarina Magalhães
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal.,Faculty of Sciences, University of Porto, Porto, Portugal
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23
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Freitas S, Silva NG, Sousa ML, Ribeiro T, Rosa F, Leão PN, Vasconcelos V, Reis MA, Urbatzka R. Chlorophyll Derivatives from Marine Cyanobacteria with Lipid-Reducing Activities. Mar Drugs 2019; 17:md17040229. [PMID: 30999602 PMCID: PMC6520785 DOI: 10.3390/md17040229] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/11/2019] [Accepted: 04/14/2019] [Indexed: 12/12/2022] Open
Abstract
Marine organisms, particularly cyanobacteria, are important resources for the production of bioactive secondary metabolites for the treatment of human diseases. In this study, a bioassay-guided approach was used to discover metabolites with lipid-reducing activity. Two chlorophyll derivatives were successfully isolated, the previously described 132-hydroxy-pheophytin a (1) and the new compound 132-hydroxy-pheofarnesin a (2). The structure elucidation of the new compound 2 was established based on one- and two-dimensional (1D and 2D) NMR spectroscopy and mass spectrometry. Compounds 1 and 2 showed significant neutral lipid-reducing activity in the zebrafish Nile red fat metabolism assay after 48 h of exposure with a half maximal effective concentration (EC50) of 8.9 ± 0.4 µM for 1 and 15.5 ± 1.3 µM for 2. Both compounds additionally reduced neutral lipid accumulation in 3T3-L1 multicellular spheroids of murine preadipocytes. Molecular profiling of mRNA expression of some target genes was evaluated for the higher potent compound 1, which indicated altered peroxisome proliferator activated receptor gamma (PPARγ) mRNA expression. Lipolysis was not affected. Different food materials (Spirulina, Chlorella, spinach, and cabbage) were evaluated for the presence of 1, and the cyanobacterium Spirulina, with GRAS (generally regarded as safe) status for human consumption, contained high amounts of 1. In summary, known and novel chlorophyll derivatives were discovered from marine cyanobacteria with relevant lipid-reducing activities, which in the future may be developed into nutraceuticals.
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Affiliation(s)
- Sara Freitas
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
| | - Natália Gonçalves Silva
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Maria Lígia Sousa
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Tiago Ribeiro
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Filipa Rosa
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Pedro N Leão
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Vitor Vasconcelos
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
| | - Mariana Alves Reis
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Ralph Urbatzka
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
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24
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Girão M, Ribeiro I, Ribeiro T, Azevedo IC, Pereira F, Urbatzka R, Leão PN, Carvalho MF. Actinobacteria Isolated From Laminaria ochroleuca: A Source of New Bioactive Compounds. Front Microbiol 2019; 10:683. [PMID: 31024480 PMCID: PMC6465344 DOI: 10.3389/fmicb.2019.00683] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 03/19/2019] [Indexed: 01/04/2023] Open
Abstract
Nature is the major reservoir of biologically active molecules. The urgent need of finding novel molecules for pharmaceutical application is prompting the research of underexplored environments, such as marine ecosystems. Here, we investigated cultivable actinobacteria associated with the macroalgae Laminaria ochroleuca and assessed their potential to produce compounds with antimicrobial or anticancer activities. A specimen of L. ochroleuca was collected in a rocky shore in northern Portugal, and fragments of tissues from different parts of the macroalgae (holdfast, stipe, and blades) were surface sterilized and plated in three culture media selective for actinobacteria. A total of 90 actinobacterial strains were isolated, most of which affiliated with the genus Streptomyces. Isolates associated with the genera Isoptericola, Rhodococcus, Nonomuraeae, Nocardiopsis, Microbispora, and Microbacterium were also obtained. Organic extracts from the isolates were tested for their antimicrobial activity using the agar-based disk diffusion method, followed by determination of minimum inhibitory concentration (MIC) values. Forty-five isolates inhibited the growth of Candida albicans and/or Staphylococcus aureus, with MIC values ranging from <0.5 to 1000 μg mL−1. The actinobacterial isolates were also tested for their anticancer potential on two human cancer cell lines. Twenty-eight extracts affected the viability of at least one human cancer cell line (breast carcinoma T-47D and neuroblastoma SH-SY5Y) and non-carcinogenic endothelial cell line (hCMEC/D3). Seven extracts affected the viability of cancer cells only. This study revealed that L. ochroleuca is a rich source of actinobacteria with promising antimicrobial and anticancer activities and suggests that macroalgae may be a valuable source of actinobacteria and, consequently, of new molecules with biotechnological importance.
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Affiliation(s)
- Mariana Girão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal.,Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Inês Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Tiago Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Isabel C Azevedo
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Filipe Pereira
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Ralph Urbatzka
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Maria F Carvalho
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
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25
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Costa M, Sampaio-Dias IE, Castelo-Branco R, Scharfenstein H, Rezende de Castro R, Silva A, Schneider MPC, Araújo MJ, Martins R, Domingues VF, Nogueira F, Camões V, Vasconcelos VM, Leão PN. Structure of Hierridin C, Synthesis of Hierridins B and C, and Evidence for Prevalent Alkylresorcinol Biosynthesis in Picocyanobacteria. J Nat Prod 2019; 82:393-402. [PMID: 30715888 DOI: 10.1021/acs.jnatprod.8b01038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Small, single-celled planktonic cyanobacteria are ubiquitous in the world's oceans yet tend not to be perceived as secondary metabolite-rich organisms. Here we report the isolation and structure elucidation of hierridin C, a minor metabolite obtained from the cultured picocyanobacterium Cyanobium sp. LEGE 06113. We describe a simple, straightforward synthetic route to the scarcely produced hierridins that relies on a key regioselective halogenation step. In addition, we show that these compounds originate from a type III PKS pathway and that similar biosynthetic gene clusters are found in a variety of bacterial genomes, most notably those of the globally distributed picocyanobacteria genera Prochlorococcus, Cyanobium and Synechococcus.
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Affiliation(s)
- Margarida Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
| | - Ivo E Sampaio-Dias
- LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Rua do Campo Alegre 687 , 4169-007 Porto , Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
| | - Hugo Scharfenstein
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
| | - Roberta Rezende de Castro
- Institute of Biological Sciences, Center of Genomic and System Biology , Federal University of Pará (UFPA) , Beleḿ , PA66075-110, Brazil
| | - Artur Silva
- Institute of Biological Sciences, Center of Genomic and System Biology , Federal University of Pará (UFPA) , Beleḿ , PA66075-110, Brazil
| | - Maria Paula C Schneider
- Institute of Biological Sciences, Center of Genomic and System Biology , Federal University of Pará (UFPA) , Beleḿ , PA66075-110, Brazil
| | - Maria João Araújo
- Institute of Biological Sciences, Center of Genomic and System Biology , Federal University of Pará (UFPA) , Beleḿ , PA66075-110, Brazil
| | - Rosário Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
- Health and Environment Research Centre (CISA), School of Health , Polytechnic Institute of Porto , Rua Dr. António Bernardino de Almeida, 400 , 4200-072 , Porto , Portugal
| | - Valentina F Domingues
- REQUIMTE/LAQV, Instituto Superior de Engenharia , Instituto Politécnico do Porto , Rua Dr. António Bernardino de Almeida, 431 , 4200-072 Porto , Portugal
| | - Fátima Nogueira
- Global Health and Tropical Medicine, GHTM, Unidade de Ensino e Investigação de Parasitologia Médica , Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa , UNL, Rua da Junqueira no. 100 , 1349-008 Lisboa , Portugal
| | - Vera Camões
- Global Health and Tropical Medicine, GHTM, Unidade de Ensino e Investigação de Parasitologia Médica , Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa , UNL, Rua da Junqueira no. 100 , 1349-008 Lisboa , Portugal
| | - Vitor M Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
- Department of Biology, Sciences Faculty , University of Porto , Rua do Campo Alegre , 4169-007 Porto , Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR) , University of Porto , Avenida General Norton de Matos, s/n , 4450-208 Matosinhos , Portugal
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26
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Martins TP, Reis MA, Leão PN. 4-Oxo-β-apo-13-carotenone from the Cyanobacterium Anabaena cylindrica PCC 7122. Chem Biodivers 2018; 15:e1800076. [PMID: 29790299 DOI: 10.1002/cbdv.201800076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/18/2018] [Indexed: 11/11/2022]
Abstract
Apocarotenoids are widely distributed among living organisms (bacteria, fungi, algae, plants and even animals) and have been associated with several signaling functions. These compounds are generated by the activity of carotenoid cleavage dioxygenases (CCDs), whose diversity greatly contributes to the large number of apocarotenoids that have been described so far. It is nevertheless expected that a considerable diversity of these molecules is yet to be discovered. In this work, we describe the isolation and structural elucidation of the apocarotenoid 4-oxo-β-apo-13-carotenone from the cultured freshwater cyanobacterium Anabaena cylindrica PCC 7122, corresponding to the first report of this compound from natural sources.
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Affiliation(s)
- Teresa P Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Mariana A Reis
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Avenida General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
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27
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Ramos V, Morais J, Castelo-Branco R, Pinheiro Â, Martins J, Regueiras A, Pereira AL, Lopes VR, Frazão B, Gomes D, Moreira C, Costa MS, Brûle S, Faustino S, Martins R, Saker M, Osswald J, Leão PN, Vasconcelos VM. Cyanobacterial diversity held in microbial biological resource centers as a biotechnological asset: the case study of the newly established LEGE culture collection. J Appl Phycol 2018; 30:1437-1451. [PMID: 29899596 PMCID: PMC5982461 DOI: 10.1007/s10811-017-1369-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 12/07/2017] [Accepted: 12/07/2017] [Indexed: 05/11/2023]
Abstract
Cyanobacteria are a well-known source of bioproducts which renders culturable strains a valuable resource for biotechnology purposes. We describe here the establishment of a cyanobacterial culture collection (CC) and present the first version of the strain catalog and its online database (http://lege.ciimar.up.pt/). The LEGE CC holds 386 strains, mainly collected in coastal (48%), estuarine (11%), and fresh (34%) water bodies, for the most part from Portugal (84%). By following the most recent taxonomic classification, LEGE CC strains were classified into at least 46 genera from six orders (41% belong to the Synechococcales), several of them are unique among the phylogenetic diversity of the cyanobacteria. For all strains, primary data were obtained and secondary data were surveyed and reviewed, which can be reached through the strain sheets either in the catalog or in the online database. An overview on the notable biodiversity of LEGE CC strains is showcased, including a searchable phylogenetic tree and images for all strains. With this work, 80% of the LEGE CC strains have now their 16S rRNA gene sequences deposited in GenBank. Also, based in primary data, it is demonstrated that several LEGE CC strains are a promising source of extracellular polymeric substances (EPS). Through a review of previously published data, it is exposed that LEGE CC strains have the potential or actual capacity to produce a variety of biotechnologically interesting compounds, including common cyanotoxins or unprecedented bioactive molecules. Phylogenetic diversity of LEGE CC strains does not entirely reflect chemodiversity. Further bioprospecting should, therefore, account for strain specificity of the valuable cyanobacterial holdings of LEGE CC.
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Affiliation(s)
- Vitor Ramos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal
| | - João Morais
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Ângela Pinheiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Joana Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Ana Regueiras
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal
| | - Ana L. Pereira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Viviana R. Lopes
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, Box 534, 751 21 Uppsala, Sweden
| | - Bárbara Frazão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- IPMA-Portuguese Institute of Sea and Atmosphere, Rua Alfredo Magalhães Ramalho, 6, 1495-006 Lisbon, Portugal
| | - Dina Gomes
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Cristiana Moreira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Maria Sofia Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Sébastien Brûle
- Master 2 Biotechnologie, Université de Bretagne-Sud, BP 92116, 56000 Lorient/Vannes, France
| | - Silvia Faustino
- Laboratory of Algae Cultivation and Bioprospection, Federal Amapá University (UNIFAP), Rodovia JK, km 2, Macapá, Amapá Brazil
| | - Rosário Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Health and Environment Research Centre, School of Health, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, Portugal
| | - Martin Saker
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Alpha Environmental Solutions, P.O. Box 37977, Dubai, United Arab Emirates
| | - Joana Osswald
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Pedro N. Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
| | - Vitor M. Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal
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Ribeiro T, Lemos F, Preto M, Azevedo J, Sousa ML, Leão PN, Campos A, Linder S, Vitorino R, Vasconcelos V, Urbatzka R. Cytotoxicity of portoamides in human cancer cells and analysis of the molecular mechanisms of action. PLoS One 2017; 12:e0188817. [PMID: 29216224 PMCID: PMC5720714 DOI: 10.1371/journal.pone.0188817] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/14/2017] [Indexed: 12/11/2022] Open
Abstract
Portoamides are cyclic peptides produced and released by the cyanobacterial strain Phormidium sp. presumably to interfere with other organisms in their ecosystems ("allelopathy"). Portoamides were previously demonstrated to have an antiproliferative effect on human lung carcinoma cells, but the underlying mechanism of this activity has not been described. In the present work, the effects of portoamides on proliferation were examined in eight human cancer cell lines and two non-carcinogenic cell lines, and major differences in sensitivities were observed. To generate hypotheses with regard to molecular mechanisms of action, quantitative proteomics using 2D gel electrophoresis and MALDI-TOF/TOF were performed on the colon carcinoma cell line HT-29. The expression of proteins involved in energy metabolism (mitochondrial respiratory chain and pentose phosphate pathway) was found to be affected. The hypothesis of altered energy metabolism was tested in further experiments. Exposure to portoamides resulted in reduced cellular ATP content, likely due to decreased mitochondrial energy production. Mitochondrial hyperpolarization and reduced mitochondrial reductive capacity was observed in treated cells. Furthermore, alterations in the expression of peroxiredoxins (PRDX4, PRDX6) and components of proteasome subunits (PSB4, PSA6) were observed in portoamide-treated cells, but these alterations were not associated with detectable increases in oxidative stress. We conclude that the cytotoxic activity of portoamides is associated with disturbance of energy metabolism, and alterations in mitochondrial structure and function.
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Affiliation(s)
- Tiago Ribeiro
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Filipa Lemos
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Marco Preto
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Joana Azevedo
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Maria Lígia Sousa
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Pedro N. Leão
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
| | - Stig Linder
- Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
- Department of Medical and Health Sciences, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Rui Vitorino
- Department of Medical Sciences, Institute of Biomedicine–iBiMED, University of Aveiro, Aveiro, Portugal
- Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
- FCUP, Faculty of Science, Department of Biology, University of Porto, Porto, Portugal
| | - Ralph Urbatzka
- CIIMAR, Interdisciplinary Center of Marine and Environmental Research, Porto, Portugal
- * E-mail:
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29
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Dias F, Antunes JT, Ribeiro T, Azevedo J, Vasconcelos V, Leão PN. Cyanobacterial Allelochemicals But Not Cyanobacterial Cells Markedly Reduce Microbial Community Diversity. Front Microbiol 2017; 8:1495. [PMID: 28848513 PMCID: PMC5550742 DOI: 10.3389/fmicb.2017.01495] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/25/2017] [Indexed: 11/13/2022] Open
Abstract
The freshwater cyanobacterium Phormidium sp. LEGE 05292 produces allelochemicals, including the cyclic depsipeptides portoamides, that influence the growth of heterotrophic bacteria, cyanobacteria, and eukaryotic algae. Using 16S rRNA gene amplicon metagenomics, we show here that, under laboratory conditions, the mixture of metabolites exuded by Phormidium sp. LEGE 05292 markedly reduces the diversity of a natural planktonic microbial community. Exposure of the same community to the portoamides alone resulted in a similar outcome. In both cases, after 16 days, alpha-diversity estimates for the allelochemical-exposed communities were less than half of those for the control communities. Photosynthetic organisms, but also different heterotrophic-bacteria taxa were found to be negatively impacted by the allelochemicals. Intriguingly, when Phormidium sp. LEGE 05292 was co-cultured with the microbial community, the latter remained stable and closer to non-exposed than to allelochemical-exposed communities. Overall, our observations indicate that although under optimal growth conditions Phormidium sp. LEGE 05292 is able to synthesize potent allelochemicals that severely impact different microorganisms, its allelopathic effect is not pronounced when in contact with a complex microbial community. Therefore, under ecologically relevant conditions, the allelopathic behavior of this cyanobacterium may be regulated by nutrient availability or by interactions with the surrounding microbiota.
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Affiliation(s)
- Filipa Dias
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Jorge T Antunes
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal.,Department of Biology, Faculty of Sciences, University of PortoPorto, Portugal
| | - Tiago Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Joana Azevedo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal.,Department of Biology, Faculty of Sciences, University of PortoPorto, Portugal
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal.,Department of Biology, Faculty of Sciences, University of PortoPorto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
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30
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Ramos VMC, Castelo-Branco R, Leão PN, Martins J, Carvalhal-Gomes S, Sobrinho da Silva F, Mendonça Filho JG, Vasconcelos VM. Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study. Front Microbiol 2017; 8:1233. [PMID: 28713360 PMCID: PMC5492833 DOI: 10.3389/fmicb.2017.01233] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 06/19/2017] [Indexed: 11/24/2022] Open
Abstract
Microbial mats are complex, micro-scale ecosystems that can be found in a wide range of environments. In the top layer of photosynthetic mats from hypersaline environments, a large diversity of cyanobacteria typically predominates. With the aim of strengthening the knowledge on the cyanobacterial diversity present in the coastal lagoon system of Araruama (state of Rio de Janeiro, Brazil), we have characterized three mat samples by means of a polyphasic approach. We have used morphological and molecular data obtained by culture-dependent and -independent methods. Moreover, we have compared different classification methodologies and discussed the outcomes, challenges, and pitfalls of these methods. Overall, we show that Araruama's lagoons harbor a high cyanobacterial diversity. Thirty-six unique morphospecies could be differentiated, which increases by more than 15% the number of morphospecies and genera already reported for the entire Araruama system. Morphology-based data were compared with the 16S rRNA gene phylogeny derived from isolate sequences and environmental sequences obtained by PCR-DGGE and pyrosequencing. Most of the 48 phylotypes could be associated with the observed morphospecies at the order level. More than one third of the sequences demonstrated to be closely affiliated (best BLAST hit results of ≥99%) with cyanobacteria from ecologically similar habitats. Some sequences had no close relatives in the public databases, including one from an isolate, being placed as “loner” sequences within different orders. This hints at hidden cyanobacterial diversity in the mats of the Araruama system, while reinforcing the relevance of using complementary approaches to study cyanobacterial diversity.
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Affiliation(s)
- Vitor M C Ramos
- Faculty of Sciences, University of PortoPorto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Joana Martins
- Faculty of Sciences, University of PortoPorto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
| | - Sinda Carvalhal-Gomes
- Palynofacies and Organic Facies Laboratory, Department of Geology, Federal University of Rio de JaneiroRio de Janeiro, Brazil
| | - Frederico Sobrinho da Silva
- Palynofacies and Organic Facies Laboratory, Department of Geology, Federal University of Rio de JaneiroRio de Janeiro, Brazil
| | - João G Mendonça Filho
- Palynofacies and Organic Facies Laboratory, Department of Geology, Federal University of Rio de JaneiroRio de Janeiro, Brazil
| | - Vitor M Vasconcelos
- Faculty of Sciences, University of PortoPorto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of PortoMatosinhos, Portugal
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31
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Leão PN, Nakamura H, Costa M, Pereira AR, Martins R, Vasconcelos V, Gerwick WH, Balskus EP. Berichtigung: Biosynthesis-Assisted Structural Elucidation of the Bartolosides, Chlorinated Aromatic Glycolipids from Cyanobacteria. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Leão PN, Nakamura H, Costa M, Pereira AR, Martins R, Vasconcelos V, Gerwick WH, Balskus EP. Corrigendum: Biosynthesis-Assisted Structural Elucidation of the Bartolosides, Chlorinated Aromatic Glycolipids from Cyanobacteria. Angew Chem Int Ed Engl 2016; 55:14895. [DOI: 10.1002/anie.201609701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Afonso TB, Costa MS, Rezende de Castro R, Freitas S, Silva A, Schneider MPC, Martins R, Leão PN. Bartolosides E-K from a Marine Coccoid Cyanobacterium. J Nat Prod 2016; 79:2504-2513. [PMID: 27680198 DOI: 10.1021/acs.jnatprod.6b00351] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The glycosylated and halogenated dialkylresorcinol (DAR) compounds bartolosides A-D (1-4) were recently discovered from marine cyanobacteria and represent a novel family of glycolipids, encoded by the brt biosynthetic gene cluster. Here, we report the isolation and NMR- and MS-based structure elucidation of monoglycosylated bartolosides E-K (5-11), obtained from Synechocystis salina LEGE 06099, a strain closely related to the cyanobacterium that produces the diglycosylated 2-4. In addition, a genome region containing orthologues of brt genes was identified in this cyanobacterium. Interestingly, the major bartoloside in S. salina LEGE 06099 was 1 (above 0.5% dry wt), originally isolated from the phylogenetically distant filamentous cyanobacterium Nodosilinea sp. LEGE 06102. Compounds 5-11 are analogues of 1, with different alkyl chain lengths or halogenation patterns. Their structures and the organization of the brt genes suggest that the DAR-forming ketosynthase BrtD can generate structural diversity by accepting fatty acyl-derived substrates of varying length. Compound 9 features a rare midchain gem-dichloro moiety, indicating that the putative halogenase BrtJ is able to act twice on the same midchain carbon.
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Affiliation(s)
- Tiago B Afonso
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
- Department of Biology, Faculty of Sciences, University of Porto , Rua do Campo Alegre, 4169-007 Porto, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), University of Porto , Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - M Sofia Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
| | - Roberta Rezende de Castro
- Institute of Biological Sciences, Center of Genomic and System Biology, Federal University of Pará (UFPA) , Belém, PA 66075-110, Brazil
| | - Sara Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
| | - Artur Silva
- Institute of Biological Sciences, Center of Genomic and System Biology, Federal University of Pará (UFPA) , Belém, PA 66075-110, Brazil
| | - Maria Paula Cruz Schneider
- Institute of Biological Sciences, Center of Genomic and System Biology, Federal University of Pará (UFPA) , Belém, PA 66075-110, Brazil
| | - Rosário Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
- Centre of Health and Environmental Research-CISA, ESTSP, Polytechnic Institute of Porto , Rua Valente Perfeito 322, 4400-330 Vila Nova de Gaia, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
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Freitas S, Martins R, Costa M, Leão PN, Vitorino R, Vasconcelos V, Urbatzka R. Hierridin B Isolated from a Marine Cyanobacterium Alters VDAC1, Mitochondrial Activity, and Cell Cycle Genes on HT-29 Colon Adenocarcinoma Cells. Mar Drugs 2016; 14:md14090158. [PMID: 27589771 PMCID: PMC5039529 DOI: 10.3390/md14090158] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/01/2016] [Accepted: 08/24/2016] [Indexed: 02/07/2023] Open
Abstract
Background: Hierridin B was isolated from a marine cyanobacterium Cyanobium sp. strain and induced cytotoxicity selectively in HT-29 adenocarcinoma cells. The underlying molecular mechanism was not yet elucidated. Methods: HT-29 cells were exposed to the IC50 concentration of hierridin B (100.2 μM) for 48 h. Non-targeted proteomics was performed using 2D gel electrophoresis and MALDI-TOF/TOF mass spectrometry. The mRNA expression of apoptotic and cell cycle genes were analyzed by real-time PCR. Automated quantification of 160 cytoplasm and mitochondrial parameter was done by fluorescence microscopy using CellProfiler software. Results: Proteomics identified 21 significant different proteins, which belonged to protein folding/synthesis and cell structure amongst others. Increase of VDAC1 protein responsible for formation of mitochondrial channels was confirmed by mRNA expression. A 10-fold decrease of cytoskeleton proteins (STMN1, TBCA) provided a link to alterations of the cell cycle. CCNB1 and CCNE mRNA were decreased two-fold, and P21CIP increased 10-fold, indicative of cell cycle arrest. Morphological analysis of mitochondrial parameter confirmed a reduced mitochondrial activity. Conclusion: Hierridin B is a potential anticancer compound that targets mitochondrial activity and function.
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Affiliation(s)
- Sara Freitas
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
| | - Rosário Martins
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
- Health and Environmental Research Center (CISA), School of Apllied Health Sciences of Porto, Polytechnic Porto, Rua Valente Perfeito 322, 4400-330 Vila Nova de Gaia, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal.
- Institute for Molecular and Cell Biology (IBMC), University of Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal.
| | - Margarida Costa
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
| | - Pedro N Leão
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
| | - Rui Vitorino
- Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
- Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal.
| | - Vitor Vasconcelos
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal.
| | - Ralph Urbatzka
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
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Leão PN, Nakamura H, Costa M, Pereira AR, Martins R, Vasconcelos V, Gerwick WH, Balskus EP. Biosynthesis‐Assisted Structural Elucidation of the Bartolosides, Chlorinated Aromatic Glycolipids from Cyanobacteria. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pedro N. Leão
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA)
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050‐123 Porto (Portugal)
| | - Hitomi Nakamura
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA)
| | - Margarida Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050‐123 Porto (Portugal)
| | - Alban R. Pereira
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA)
| | - Rosário Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050‐123 Porto (Portugal)
- Centre of Health and Environmental Research—CISA, ESTSP, Polytechnic Institute of Porto, Rua Valente Perfeito 322, 4400‐330 Vila Nova de Gaia (Portugal)
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050‐123 Porto (Portugal)
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169‐007 Porto (Portugal)
| | - William H. Gerwick
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA)
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093 (USA)
| | - Emily P. Balskus
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA)
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Leão PN, Nakamura H, Costa M, Pereira AR, Martins R, Vasconcelos V, Gerwick WH, Balskus EP. Biosynthesis-assisted structural elucidation of the bartolosides, chlorinated aromatic glycolipids from cyanobacteria. Angew Chem Int Ed Engl 2015; 54:11063-7. [PMID: 26235728 PMCID: PMC5687511 DOI: 10.1002/anie.201503186] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/15/2015] [Indexed: 11/11/2022]
Abstract
The isolation of the bartolosides, unprecedented cyanobacterial glycolipids featuring aliphatic chains with chlorine substituents and C-glycosyl moieties, is reported. Their chlorinated dialkylresorcinol (DAR) core presented a major structural-elucidation challenge. To overcome this, we discovered the bartoloside (brt) biosynthetic gene cluster and linked it to the natural products through in vitro characterization of the DAR-forming ketosynthase and aromatase. Bioinformatic analysis also revealed a novel potential halogenase. Knowledge of the bartoloside biosynthesis constrained the DAR core structure by defining key pathway intermediates, ultimately allowing us to determine the full structures of the bartolosides. This work illustrates the power of genomics to enable the use of biosynthetic information for structure elucidation.
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Affiliation(s)
- Pedro N Leão
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA)
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050-123 Porto (Portugal)
| | - Hitomi Nakamura
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA)
| | - Margarida Costa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050-123 Porto (Portugal)
| | - Alban R Pereira
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA)
| | - Rosário Martins
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050-123 Porto (Portugal)
- Centre of Health and Environmental Research-CISA, ESTSP, Polytechnic Institute of Porto, Rua Valente Perfeito 322, 4400-330 Vila Nova de Gaia (Portugal)
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas, 289, 4050-123 Porto (Portugal).
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto (Portugal).
| | - William H Gerwick
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 (USA).
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093 (USA).
| | - Emily P Balskus
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge MA, 02138 (USA).
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Almeida JR, Freitas M, Cruz S, Leão PN, Vasconcelos V, Cunha I. Acetylcholinesterase in Biofouling Species: Characterization and Mode of Action of Cyanobacteria-Derived Antifouling Agents. Toxins (Basel) 2015. [PMID: 26213967 PMCID: PMC4549721 DOI: 10.3390/toxins7082739] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Effective and ecofriendly antifouling (AF) compounds have been arising from naturally produced chemicals. The objective of this study is to use cyanobacteria-derived agents to investigate the role of acetylcholinesterase (AChE) activity as an effect and/or mode of action of promising AF compounds, since AChE inhibitors were found to inhibit invertebrate larval settlement. To pursue this objective, in vitro quantification of AChE activity under the effect of several cyanobacterial strain extracts as potential AF agents was performed along with in vivo AF (anti-settlement) screening tests. Pre-characterization of different cholinesterases (ChEs) forms present in selected tissues of important biofouling species was performed to confirm the predominance of AChE, and an in vitro AF test using pure AChE activity was developed. Eighteen cyanobacteria strains were tested as source of potential AF and AChE inhibitor agents. Results showed effectiveness in selecting promising eco-friendly AF agents, allowing the understanding of the AF biochemical mode of action induced by different compounds. This study also highlights the potential of cyanobacteria as source of AF agents towards invertebrate macrofouling species.
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Affiliation(s)
- Joana R Almeida
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
| | - Micaela Freitas
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto P 4069-007, Portugal.
| | - Susana Cruz
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
| | - Pedro N Leão
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
| | - Vitor Vasconcelos
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto P 4069-007, Portugal.
| | - Isabel Cunha
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto P 4050-123, Portugal.
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Antunes JT, Leão PN, Vasconcelos VM. Cylindrospermopsis raciborskii: review of the distribution, phylogeography, and ecophysiology of a global invasive species. Front Microbiol 2015; 6:473. [PMID: 26042108 PMCID: PMC4435233 DOI: 10.3389/fmicb.2015.00473] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/29/2015] [Indexed: 11/13/2022] Open
Abstract
Cylindrospermopsis raciborskii is a cyanobacterial species extensively studied for its toxicity, bloom formation and invasiveness potential, which have consequences to public and environmental health. Its current geographical distribution, spanning different climates, suggests that C. raciborskii has acquired the status of a cosmopolitan species. From phylogeography studies, a tropical origin for this species seems convincing, with different conjectural routes of expansion toward temperate climates. This expansion may be a result of the species physiological plasticity, or of the existence of different ecotypes with distinct environmental requirements. In particular, C. raciborskii is known to tolerate wide temperature and light regimes and presents diverse nutritional strategies. This cyanobacterium is also thought to have benefited from climate change conditions, regarding its invasiveness into temperate climates. Other factors, recently put forward, such as allelopathy, may also be important to its expansion. The effect of C. raciborskii in the invaded communities is still mostly unknown but may strongly disturb species diversity at different trophic levels. In this review we present an up-to-date account of the distribution, phylogeography, ecophysiology, as well some preliminary reports of the impact of C. raciborskii in different organisms.
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Affiliation(s)
- Jorge T Antunes
- Faculty of Sciences, University of Porto , Porto, Portugal ; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Porto, Portugal
| | - Vítor M Vasconcelos
- Faculty of Sciences, University of Porto , Porto, Portugal ; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto , Porto, Portugal
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Costa MS, Costa M, Ramos V, Leão PN, Barreiro A, Vasconcelos V, Martins R. Picocyanobacteria from a clade of marine Cyanobium revealed bioactive potential against microalgae, bacteria, and marine invertebrates. J Toxicol Environ Health A 2015; 78:432-42. [PMID: 25785557 DOI: 10.1080/15287394.2014.991466] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The production of bioactive compounds either toxic or with pharmacological applications by cyanobacteria is well established. However, picoplanktonic forms within this group of organisms have rarely been studied in this context. In this study, the toxicological potential of picocyanobacteria from a clade of marine Cyanobium strains isolated from the Portuguese coast was examined using different biological models. First, strains were identified by applying morphological and molecular approaches and cultured under lab conditions. A crude extract and three fractions reflecting a preliminary segregation of lipophilic metabolites were tested for toxicity with the marine microalga Nannochloropsis sp., the bacteria Pseudomonas sp., the brine shrimp Artemia salina, and fertilized eggs of the sea urchin Paracentrotus lividus. No significant apparent adverse effects were noted against Artemia salina. However, significant adverse effects were found in all other assays, with an inhibition of Nannochloropsis sp. and Pseudomonas sp. growth and marked reduction in Paracentrotus lividus larvae length. The results obtained indicated that Cyanobium genus may serve as a potential source of interesting bioactive compounds and emphasize the importance of also studying smaller picoplanktonic fractions of marine cyanobacteria.
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Affiliation(s)
- Maria Sofia Costa
- a Interdisciplinary Centre of Marine and Environmental Research , Porto University , Porto , Portugal
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40
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Martins J, Leão PN, Ramos V, Vasconcelos V. N-terminal protease gene phylogeny reveals the potential for novel cyanobactin diversity in cyanobacteria. Mar Drugs 2013; 11:4902-16. [PMID: 24351973 PMCID: PMC3877893 DOI: 10.3390/md11124902] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 11/21/2013] [Accepted: 11/21/2013] [Indexed: 11/29/2022] Open
Abstract
Cyanobactins are a recently recognized group of ribosomal cyclic peptides produced by cyanobacteria, which have been studied because of their interesting biological activities. Here, we have used a PCR-based approach to detect the N-terminal protease (A) gene from cyanobactin synthetase gene clusters, in a set of diverse cyanobacteria from our culture collection (Laboratory of Ecotoxicology, Genomics and Evolution (LEGE) CC). Homologues of this gene were found in Microcystis and Rivularia strains, and for the first time in Cuspidothrix, Phormidium and Sphaerospermopsis strains. Phylogenetic relationships inferred from available A-gene sequences, including those obtained in this work, revealed two new groups of phylotypes, harboring Phormidium, Sphaerospermopsis and Rivularia LEGE isolates. Thus, this study shows that, using underexplored cyanobacterial strains, it is still possible to expand the known genetic diversity of genes involved in cyanobactin biosynthesis.
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Affiliation(s)
- Joana Martins
- Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (J.M.); (V.R.)
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto 4050-123, Portugal; E-Mail:
| | - Pedro N. Leão
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto 4050-123, Portugal; E-Mail:
| | - Vitor Ramos
- Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (J.M.); (V.R.)
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto 4050-123, Portugal; E-Mail:
| | - Vitor Vasconcelos
- Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (J.M.); (V.R.)
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, Porto 4050-123, Portugal; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +351-22-340-18-37; Fax: +351-22-339-06-08
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41
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Leão PN, Costa M, Ramos V, Pereira AR, Fernandes VC, Domingues VF, Gerwick WH, Vasconcelos VM, Martins R. Antitumor activity of hierridin B, a cyanobacterial secondary metabolite found in both filamentous and unicellular marine strains. PLoS One 2013; 8:e69562. [PMID: 23922738 PMCID: PMC3726634 DOI: 10.1371/journal.pone.0069562] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 06/10/2013] [Indexed: 11/19/2022] Open
Abstract
Cyanobacteria are widely recognized as a valuable source of bioactive metabolites. The majority of such compounds have been isolated from so-called complex cyanobacteria, such as filamentous or colonial forms, which usually display a larger number of biosynthetic gene clusters in their genomes, when compared to free-living unicellular forms. Nevertheless, picocyanobacteria are also known to have potential to produce bioactive natural products. Here, we report the isolation of hierridin B from the marine picocyanobacterium Cyanobium sp. LEGE 06113. This compound had previously been isolated from the filamentous epiphytic cyanobacterium Phormidium ectocarpi SAG 60.90, and had been shown to possess antiplasmodial activity. A phylogenetic analysis of the 16S rRNA gene from both strains confirmed that these cyanobacteria derive from different evolutionary lineages. We further investigated the biological activity of hierridin B, and tested its cytotoxicity towards a panel of human cancer cell lines; it showed selective cytotoxicity towards HT-29 colon adenocarcinoma cells.
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Affiliation(s)
- Pedro N Leão
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal.
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Leão PN, Ramos V, Gonçalves PB, Viana F, Lage OM, Gerwick WH, Vasconcelos VM. Chemoecological screening reveals high bioactivity in diverse culturable Portuguese marine cyanobacteria. Mar Drugs 2013; 11:1316-35. [PMID: 23609580 PMCID: PMC3705407 DOI: 10.3390/md11041316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 03/12/2013] [Accepted: 03/27/2013] [Indexed: 11/29/2022] Open
Abstract
Marine cyanobacteria, notably those from tropical regions, are a rich source of bioactive secondary metabolites. Tropical marine cyanobacteria often grow to high densities in the environment, allowing direct isolation of many secondary metabolites from field-collected material. However, in temperate environments culturing is usually required to produce enough biomass for investigations of their chemical constituents. In this work, we cultured a selection of novel and diverse cyanobacteria isolated from the Portuguese coast, and tested their organic extracts in a series of ecologically-relevant bioassays. The majority of the extracts showed activity in at least one of the bioassays, all of which were run in very small scale. Phylogenetically related isolates exhibited different activity profiles, highlighting the value of microdiversity for bioprospection studies. Furthermore, LC-MS analyses of selected active extracts suggested the presence of previously unidentified secondary metabolites. Overall, the screening strategy employed here, in which previously untapped cyanobacterial diversity was combined with multiple bioassays, proved to be a successful strategy and allowed the selection of several strains for further investigations based on their bioactivity profiles.
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Affiliation(s)
- Pedro N. Leão
- CIMAR/CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, Porto 4050-123, Portugal; E-Mails: (V.R.); (P.B.G.); (V.M.V.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +351-223-401-837; Fax: +351-223-390-608
| | - Vitor Ramos
- CIMAR/CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, Porto 4050-123, Portugal; E-Mails: (V.R.); (P.B.G.); (V.M.V.)
| | - Patrício B. Gonçalves
- CIMAR/CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, Porto 4050-123, Portugal; E-Mails: (V.R.); (P.B.G.); (V.M.V.)
| | - Flávia Viana
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (F.V.); (O.M.L.)
| | - Olga M. Lage
- CIMAR/CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, Porto 4050-123, Portugal; E-Mails: (V.R.); (P.B.G.); (V.M.V.)
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (F.V.); (O.M.L.)
| | - William H. Gerwick
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA; E-Mail:
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Vitor M. Vasconcelos
- CIMAR/CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, Porto 4050-123, Portugal; E-Mails: (V.R.); (P.B.G.); (V.M.V.)
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal; E-Mails: (F.V.); (O.M.L.)
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Antunes JT, Leão PN, Vasconcelos VM. Influence of biotic and abiotic factors on the allelopathic activity of the cyanobacterium Cylindrospermopsis raciborskii strain LEGE 99043. Microb Ecol 2012; 64:584-592. [PMID: 22562107 DOI: 10.1007/s00248-012-0061-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 04/17/2012] [Indexed: 05/31/2023]
Abstract
Allelopathy is considered to be one of the factors underlying the global expansion of the toxic cyanobacterium Cylindrospermopsis raciborskii. Although the production and release of allelopathic compounds by cyanobacteria is acknowledged to be influenced by environmental parameters, the response of C. raciborskii remains generally unrecognized. Here, the growth and allelopathic potential of C. raciborskii strain LEGE 99043 towards the ubiquitous microalga Ankistrodesmus falcatus were analyzed under different biotic and abiotic conditions. Filtrates from C. raciborskii cultures growing at different cell densities displayed broad inhibitory activity. Moreover, higher temperature, higher light intensity as well phosphate limitation further enhanced this activity. The distinct and comprehensive patterns of inhibition verified during the growth phase, and under the tested parameters, suggest the action of several, still unidentified allelopathic compounds. It is expectable that the observed increase in allelopathic activity can result in distinct ecological advantages to C. raciborskii.
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Affiliation(s)
- Jorge T Antunes
- CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal.
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Abstract
This review covers the literature on the chemically mediated ecology of cyanobacteria, including ultraviolet radiation protection, feeding-deterrence, allelopathy, resource competition, and signalling. To highlight the chemical and biological diversity of this group of organisms, evolutionary and chemotaxonomical studies are presented. Several technologically relevant aspects of cyanobacterial chemical ecology are also discussed.
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Affiliation(s)
- Pedro N Leão
- CIIMAR/CIMAR, Center for Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal.
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Leão PN, Ramos V, Vale M, Machado JP, Vasconcelos VM. Microbial community changes elicited by exposure to cyanobacterial allelochemicals. Microb Ecol 2012; 63:85-95. [PMID: 21947429 DOI: 10.1007/s00248-011-9939-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Accepted: 07/05/2011] [Indexed: 05/31/2023]
Abstract
An increasing body of evidence points out that allelopathy may be an important process shaping microbial communities in aquatic ecosystems. Cyanobacteria have well-documented allelopathic properties, mainly derived from the evaluation of the activity of allelopathic extracts or pure compounds towards monocultures of selected target microorganisms. Consequently, little is known regarding the community dynamics of microorganisms associated with allelopathic interactions. In this laboratory-based study, a Microcystis spp.-dominated microbial community from a freshwater lake was exposed, for 15 days, to exudates from the cyanobacterium Oscillatoria sp. strain LEGE 05292 in laboratory conditions. This cyanobacterium is known to produce the allelochemicals portoamides, which were among the exuded compounds. The community composition was followed (by means of polymerase chain reaction followed by denaturing gradient gel electrophoresis and microscopic analyses) and compared to that of a non-exposed situation. Following exposure, clear differences in the community structure were observed, in particular for cyanobacteria and unicellular eukaryotic taxa. Interestingly, distinct Microcystis genotypes present in the community were differentially impacted by the exposure, highlighting the fine-scale dynamics elicited by the exudates. These results support a role for cyanobacterial allelochemicals in the structuring of aquatic microbial communities.
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Affiliation(s)
- Pedro N Leão
- CIIMAR/CIMAR-LA, Center for Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal
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Leão PN, Pereira AR, Liu WT, Ng J, Pevzner PA, Dorrestein PC, König GM, Vasconcelos VM, Gerwick WH. Synergistic allelochemicals from a freshwater cyanobacterium. Proc Natl Acad Sci U S A 2010; 107:11183-8. [PMID: 20534563 PMCID: PMC2895120 DOI: 10.1073/pnas.0914343107] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ability of cyanobacteria to produce complex secondary metabolites with potent biological activities has gathered considerable attention due to their potential therapeutic and agrochemical applications. However, the precise physiological or ecological roles played by a majority of these metabolites have remained elusive. Several studies have shown that cyanobacteria are able to interfere with other organisms in their communities through the release of compounds into the surrounding medium, a phenomenon usually referred to as allelopathy. Exudates from the freshwater cyanobacterium Oscillatoria sp. had previously been shown to inhibit the green microalga Chlorella vulgaris. In this study, we observed that maximal allelopathic activity is highest in early growth stages of the cyanobacterium, and this provided sufficient material for isolation and chemical characterization of active compounds that inhibited the growth of C. vulgaris. Using a bioassay-guided approach, we isolated and structurally characterized these metabolites as cyclic peptides containing several unusually modified amino acids that are found both in the cells and in the spent media of Oscillatoria sp. cultures. Strikingly, only the mixture of the two most abundant metabolites in the cells was active toward C. vulgaris. Synergism was also observed in a lung cancer cell cytotoxicity assay. The binary mixture inhibited other phytoplanktonic organisms, supporting a natural function of this synergistic mixture of metabolites as allelochemicals.
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Affiliation(s)
- Pedro N. Leão
- CIIMAR/CIMAR-LA, Center for Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal
- Scripps Institution of Oceanography
| | | | | | - Julio Ng
- Department of Computer Science and Engineering, and
| | | | - Pieter C. Dorrestein
- Scripps Institution of Oceanography
- Department of Chemistry and Biochemistry
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093-0636
| | - Gabriele M. König
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany; and
| | - Vitor M. Vasconcelos
- CIIMAR/CIMAR-LA, Center for Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - William H. Gerwick
- Scripps Institution of Oceanography
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093-0636
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Abstract
Freshwater cyanobacteria produce several bioactive secondary metabolites with diverse chemical structure, which may achieve high concentrations in the aquatic medium when cyanobacterial blooms occur. Some of the compounds released by cyanobacteria have allelopathic properties, influencing the biological processes of other phytoplankton or aquatic plants. These kinds of interactions are more easily detectable under laboratory studies; however their ecological relevance is often debated. Recent research has discovered new allelopathic properties in some cyanobacteria species, new allelochemicals and elucidated some of the allelopathic mechanisms. Ecosystem-level approaches have shed some light on the factors that influence allelopathic interactions, as well as how cyanobacteria may be able to modulate their surrounding environment by means of allelochemical release. Nevertheless, the role of allelopathy in cyanobacteria ecology is still not well understood, and its clarification should benefit from carefully designed field studies, chemical characterization of allelochemicals and new methodological approaches at the "omics" level.
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Affiliation(s)
- Pedro N Leão
- CIIMAR/CIMAR-LA, Centro Interdisciplinar de Investigação Marinha e Ambiental, Porto, Portugal.
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48
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Martins JC, Leão PN, Vasconcelos V. Differential protein expression in Corbicula fluminea upon exposure to a Microcystis aeruginosa toxic strain. Toxicon 2009; 53:409-16. [DOI: 10.1016/j.toxicon.2008.12.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Leão PN, Vasconcelos MTSD, Vasconcelos VM. Role of marine cyanobacteria in trace metal bioavailability in seawater. Microb Ecol 2007; 53:104-9. [PMID: 17186147 DOI: 10.1007/s00248-006-9153-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2006] [Accepted: 07/26/2006] [Indexed: 05/13/2023]
Abstract
In seawater, several trace metals with biological significance are highly complexed with organic matter. Marine cyanobacteria are an important phytoplanktonic group, with the ability to release trace metal-binding compounds to the seawater medium, which in turn modulates their bioavailability and influences their biogeochemical cycles. Such interactions may allow cyanobacteria to more easily access less available trace metals essential for their metabolic processes, or, conversely, keep the toxic forms of the trace metals from reaching intolerable levels. In this minireview, Cu and Fe interactions with cyanobacteria received special attention, although other trace metals (Co, Pb, Zn, and Cd) are also covered. Recent research has shed light on many aspects of trace metal-cyanobacteria ecology in seawater; nevertheless, the biochemical processes behind this dynamics and the structure of the vast majority of the metal binding compounds remain unclear.
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Affiliation(s)
- Pedro N Leão
- CIIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas 289, 4050-123, Porto, Portugal.
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