1
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Moore J, Jayakumar A, Soldatou S, Mašek O, Lawton LA, Edwards C. Nature-Based Solution to Eliminate Cyanotoxins in Water Using Biologically Enhanced Biochar. Environ Sci Technol 2023; 57:16372-16385. [PMID: 37856890 PMCID: PMC10620996 DOI: 10.1021/acs.est.3c05298] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/21/2023]
Abstract
Climate change and high eutrophication levels of freshwater sources are increasing the occurrence and intensity of toxic cyanobacterial blooms in drinking water supplies. Conventional water treatment struggles to eliminate cyanobacteria/cyanotoxins, and expensive tertiary treatments are needed. To address this, we have designed a sustainable, nature-based solution using biochar derived from waste coconut shells. This biochar provides a low-cost porous support for immobilizing microbial communities, forming biologically enhanced biochar (BEB). Highly toxic microcystin-LR (MC-LR) was used to influence microbial colonization of the biochar by the natural lake-water microbiome. Over 11 months, BEBs were exposed to microcystins, cyanobacterial extracts, and live cyanobacterial cells, always resulting in rapid elimination of toxins and even a 1.6-1.9 log reduction in cyanobacterial cell numbers. After 48 h of incubation with our BEBs, the MC-LR concentrations dropped below the detection limit of 0.1 ng/mL. The accelerated degradation of cyanotoxins was attributed to enhanced species diversity and microcystin-degrading microbes colonizing the biochar. To ensure scalability, we evaluated BEBs produced through batch-scale and continuous-scale pyrolysis, while also guaranteeing safety by maintaining toxic impurities in biochar within acceptable limits and monitoring degradation byproducts. This study serves as a proof-of-concept for a sustainable, scalable, and safe nature-based solution for combating toxic algal blooms.
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Affiliation(s)
- Jane Moore
- CyanoSol,
School of Pharmacy and Life Sciences, Robert
Gordon University, Aberdeen AB10 7AQ, U.K.
| | - Anjali Jayakumar
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
- UK Biochar
Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh EH9 3JW, U.K.
| | - Sylvia Soldatou
- CyanoSol,
School of Pharmacy and Life Sciences, Robert
Gordon University, Aberdeen AB10 7AQ, U.K.
- Marine
Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB25 1HG, U.K.
| | - Ondřej Mašek
- UK Biochar
Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh EH9 3JW, U.K.
| | - Linda A Lawton
- CyanoSol,
School of Pharmacy and Life Sciences, Robert
Gordon University, Aberdeen AB10 7AQ, U.K.
| | - Christine Edwards
- CyanoSol,
School of Pharmacy and Life Sciences, Robert
Gordon University, Aberdeen AB10 7AQ, U.K.
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2
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Diyaolu OA, Oluwabusola ET, Attah AF, Olori EO, Fagbemi AA, Preet G, Soldatou S, Moody JO, Jaspars M, Ebel R. Can Crude Oil Exploration Influence the Phytochemicals and Bioactivity of Medicinal Plants? A Case of Nigerian Vernonia amygdalina and Ocimum gratissimum. Molecules 2022; 27:molecules27238372. [PMID: 36500460 PMCID: PMC9740812 DOI: 10.3390/molecules27238372] [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] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/26/2022] [Accepted: 11/27/2022] [Indexed: 12/02/2022]
Abstract
The Nigerian Niger-Delta crude oil exploration often results in spills that affect indigenous medicinal plant biodiversity, likely changing the phytochemical profile of surviving species, their bioactivity or toxicity. In crude oil-rich Kokori and crude oil-free Abraka, classic examples of indigenous plants occupying the medicine-food interface include Vernonia amygdalina (VAL) and Ocimum gratissimum leaves (OGL). These plants are frequently utilised during pregnancy and in anaemia. To date, no scientific investigation has been reported on the potential changes to the phytochemical or bioactivity of the study plants. To discuss the similarities and dissimilarities in antisickling bioactivity and phytochemicals in VAL and OGL collected from Kokori (VAL-KK and OGL-KK) and Abraka (VAL-AB and OGL-AB), in silico, in vitro and comparative UPLC-QTOF-MS analysis was performed. Nine unique compounds were identified in OGL-KK, which have never been reported in the literature, while differences in antisickling potentials were observed in VAL-KK, OGL-KK and, VAL-AB, OGL-AB. Our findings show that VAL-AB and OGL-AB are richer and more diverse in phytochemicals and displayed a slightly higher antisickling activity than VAL-KK and OGL-KK. Ligand-based pharmacophore modelling was performed to understand the potential compounds better; this study may provide a basis for explaining the effect of crude oil spills on secondary metabolites and a reference for further research.
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Affiliation(s)
- Oluwatofunmilayo A. Diyaolu
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
- Correspondence: (O.A.D.); (R.E.)
| | - Emmanuel T. Oluwabusola
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
| | - Alfred F. Attah
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240003, Nigeria
| | - Eric O. Olori
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ibadan, Ibadan 200005, Nigeria
| | - Adeshola A. Fagbemi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Lead City University, Ibadan 200255, Nigeria
| | - Gagan Preet
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
| | - Jones O. Moody
- Department of Pharmacognosy, Faculty of Pharmacy, University of Ibadan, Ibadan 200005, Nigeria
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
- Correspondence: (O.A.D.); (R.E.)
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van Santen JA, Poynton EF, Iskakova D, McMann E, Alsup T, Clark TN, Fergusson CH, Fewer DP, Hughes AH, McCadden CA, Parra J, Soldatou S, Rudolf JD, Janssen EML, Duncan KR, Linington RG. The Natural Products Atlas 2.0: a database of microbially-derived natural products. Nucleic Acids Res 2022; 50:D1317-D1323. [PMID: 34718710 PMCID: PMC8728154 DOI: 10.1093/nar/gkab941] [Citation(s) in RCA: 88] [Impact Index Per Article: 44.0] [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: 08/18/2021] [Revised: 09/27/2021] [Accepted: 10/01/2021] [Indexed: 12/15/2022] Open
Abstract
Within the natural products field there is an increasing emphasis on the study of compounds from microbial sources. This has been fuelled by interest in the central role that microorganisms play in mediating both interspecies interactions and host-microbe relationships. To support the study of natural products chemistry produced by microorganisms we released the Natural Products Atlas, a database of known microbial natural products structures, in 2019. This paper reports the release of a new version of the database which includes a full RESTful application programming interface (API), a new website framework, and an expanded database that includes 8128 new compounds, bringing the total to 32 552. In addition to these structural and content changes we have added full taxonomic descriptions for all microbial taxa and have added chemical ontology terms from both NP Classifier and ClassyFire. We have also performed manual curation to review all entries with incomplete configurational assignments and have integrated data from external resources, including CyanoMetDB. Finally, we have improved the user experience by updating the Overview dashboard and creating a dashboard for taxonomic origin. The database can be accessed via the new interactive website at https://www.npatlas.org.
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Affiliation(s)
- Jeffrey A van Santen
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Ella F Poynton
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Dasha Iskakova
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Emily McMann
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Tyler A Alsup
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Trevor N Clark
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Claire H Fergusson
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - David P Fewer
- Department of Microbiology, University of Helsinki, 00014 Helsinki, Finland
| | - Alison H Hughes
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow G4 0RE, UK
| | - Caitlin A McCadden
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Jonathan Parra
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow G4 0RE, UK
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
| | - Jeffrey D Rudolf
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Elisabeth M-L Janssen
- Department of Environmental Chemistry, Swiss Federal Institute of Aquatic Science and Technology (Eawag), 8600 Duebendorf, Switzerland
| | - Katherine R Duncan
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow G4 0RE, UK
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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Laguionie-Marchais C, Allcock AL, Baker BJ, Conneely EA, Dietrick SG, Kearns F, McKeever K, Young RM, Sierra CA, Soldatou S, Woodcock HL, Johnson MP. Not Drug-like, but Like Drugs: Cnidaria Natural Products. Mar Drugs 2021; 20:42. [PMID: 35049897 PMCID: PMC8779300 DOI: 10.3390/md20010042] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/23/2021] [Accepted: 12/24/2021] [Indexed: 12/26/2022] Open
Abstract
Phylum Cnidaria has been an excellent source of natural products, with thousands of metabolites identified. Many of these have not been screened in bioassays. The aim of this study was to explore the potential of 5600 Cnidaria natural products (after excluding those known to derive from microbial symbionts), using a systematic approach based on chemical space, drug-likeness, predicted toxicity, and virtual screens. Previous drug-likeness measures: the rule-of-five, quantitative estimate of drug-likeness (QED), and relative drug likelihoods (RDL) are based on a relatively small number of molecular properties. We augmented this approach using reference drug and toxin data sets defined for 51 predicted molecular properties. Cnidaria natural products overlap with drugs and toxins in this chemical space, although a multivariate test suggests that there are some differences between the groups. In terms of the established drug-likeness measures, Cnidaria natural products have generally lower QED and RDL scores than drugs, with a higher prevalence of metabolites that exceed at least one rule-of-five threshold. An index of drug-likeness that includes predicted toxicity (ADMET-score), however, found that Cnidaria natural products were more favourable than drugs. A measure of the distance of individual Cnidaria natural products to the centre of the drug distribution in multivariate chemical space was related to RDL, ADMET-score, and the number of rule-of-five exceptions. This multivariate similarity measure was negatively correlated with the QED score for the same metabolite, suggesting that the different approaches capture different aspects of the drug-likeness of individual metabolites. The contrasting of different drug similarity measures can help summarise the range of drug potential in the Cnidaria natural product data set. The most favourable metabolites were around 210-265 Da, quite often sesquiterpenes, with a moderate degree of complexity. Virtual screening against cancer-relevant targets found wide evidence of affinities, with Glide scores <-7 in 19% of the Cnidaria natural products.
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Affiliation(s)
- Claire Laguionie-Marchais
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
| | - A. Louise Allcock
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
| | - Bill J. Baker
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
| | - Ellie-Ann Conneely
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
| | - Sarah G. Dietrick
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
| | - Fiona Kearns
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
| | - Kate McKeever
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
| | - Ryan M. Young
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
- School of Chemistry, National University of Ireland Galway, H91 TK33 Galway, Ireland
| | - Connor A. Sierra
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
| | - Sylvia Soldatou
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
- School of Chemistry, National University of Ireland Galway, H91 TK33 Galway, Ireland
| | - H. Lee Woodcock
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA; (B.J.B.); (S.G.D.); (F.K.); (C.A.S.); (S.S.); (H.L.W.)
| | - Mark P. Johnson
- School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (C.L.-M.); (A.L.A.); (E.-A.C.); (K.M.); (R.M.Y.)
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5
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Jayakumar A, Wurzer C, Soldatou S, Edwards C, Lawton LA, Mašek O. New directions and challenges in engineering biologically-enhanced biochar for biological water treatment. Sci Total Environ 2021; 796:148977. [PMID: 34273833 DOI: 10.1016/j.scitotenv.2021.148977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 02/19/2021] [Revised: 06/07/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Cost-effective, efficient, and sustainable water treatment solutions utilising existing materials and technology will make it easier for low and middle-income countries to adopt them, improving public health. The ability of biochar to mediate and support microbial degradation of contaminants, combined with its carbon-sequestration potential, has attracted attention in recent years. Biochar is a possible candidate for use in cost-effective and sustainable biological water treatment, especially in agrarian economies with easy access to abundant biomass in the form of crop residues and organic wastes. This review evaluates the scope, potential benefits (economic and environmental) and challenges of sustainable biological water treatment using 'Biologically-Enhanced Biochar' or BEB. We discuss the various processes occurring in BEB systems and demonstrate the urgent need to investigate microbial degradation mechanisms. We highlight the need to correlate biochar properties to biofilm development, which can eventually determine process efficiency. We also demonstrate the various opportunities in adopting BEB as a cheaper and more viable alternative in Low and Middle Income Countries and compare it to the current benchmark, 'Biological Activated Carbon'. We focus on the recent advances in the areas of data science, mathematical modelling and molecular biology to systematically and sustainably design BEB filters, unlike the largely empirical design approaches seen in water treatment. 'Sequential biochar systems' are introduced as specially designed end-of-life techniques to lower the environmental impact of BEB filters and examples of their integration into biological water treatment that can fulfil zero waste criteria for BEBs are given.
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Affiliation(s)
- Anjali Jayakumar
- UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh, UK.
| | - Christian Wurzer
- UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh, UK
| | - Sylvia Soldatou
- CyanoSol, School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK
| | - Christine Edwards
- CyanoSol, School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK
| | - Linda A Lawton
- CyanoSol, School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK
| | - Ondřej Mašek
- UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh, UK
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6
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Parra J, Soldatou S, Rooney LM, Duncan KR. Pseudonocardia abyssalis sp. nov. and Pseudonocardia oceani sp. nov., two novel actinomycetes isolated from the deep Southern Ocean. Int J Syst Evol Microbiol 2021; 71:005032. [PMID: 34582326 PMCID: PMC8549268 DOI: 10.1099/ijsem.0.005032] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 07/23/2021] [Accepted: 08/20/2021] [Indexed: 01/25/2023] Open
Abstract
The actinomycetes strains KRD168T and KRD185T were isolated from sediments collected from the deep Southern Ocean and, in this work, they are described as representing two novel species of the genus Pseudonocardia through a polyphasic approach. Despite sharing >99 % 16S rRNA gene sequence similarity with other members of the genus, comparative genomic analysis allowed species delimitation based on average nucleotide identity and digital DNA-DNA hybridization. The KRD168T genome is characterized by a size of 6.31 Mbp and a G+C content of 73.44 mol%, while the KRD185T genome has a size of 6.82 Mbp and a G+C content of 73.98 mol%. Both strains contain meso-diaminopimelic acid as the diagnostic diamino acid, glucose as the major whole-cell sugar, MK-8(H4) as a major menaquinone and iso-branched hexadecanoic acid as a major fatty acid. Biochemical and fatty acid analyses also revealed differences between these strains and their phylogenetic neighbours, supporting their status as distinct species. The names Pseudonocardia abyssalis sp. nov. (type strain KRD168T=DSM 111918T=NCIMB 15270T) and Pseudonocardia oceani (type strain KRD185T=DSM 111919T=NCIMB 15269T) are proposed.
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Affiliation(s)
- Jonathan Parra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde,, Glasgow G4 0RE, UK
| | - Sylvia Soldatou
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde,, Glasgow G4 0RE, UK
- Present address: School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen AB10 7GJ, UK
| | - Liam M. Rooney
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde,, Glasgow G4 0RE, UK
- Present address: Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Katherine R. Duncan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde,, Glasgow G4 0RE, UK
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Hjörleifsson Eldjárn G, Ramsay A, van der Hooft JJJ, Duncan KR, Soldatou S, Rousu J, Daly R, Wandy J, Rogers S. Ranking microbial metabolomic and genomic links in the NPLinker framework using complementary scoring functions. PLoS Comput Biol 2021; 17:e1008920. [PMID: 33945539 PMCID: PMC8130963 DOI: 10.1371/journal.pcbi.1008920] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 10/07/2020] [Revised: 05/18/2021] [Accepted: 03/26/2021] [Indexed: 12/31/2022] Open
Abstract
Specialised metabolites from microbial sources are well-known for their wide range of biomedical applications, particularly as antibiotics. When mining paired genomic and metabolomic data sets for novel specialised metabolites, establishing links between Biosynthetic Gene Clusters (BGCs) and metabolites represents a promising way of finding such novel chemistry. However, due to the lack of detailed biosynthetic knowledge for the majority of predicted BGCs, and the large number of possible combinations, this is not a simple task. This problem is becoming ever more pressing with the increased availability of paired omics data sets. Current tools are not effective at identifying valid links automatically, and manual verification is a considerable bottleneck in natural product research. We demonstrate that using multiple link-scoring functions together makes it easier to prioritise true links relative to others. Based on standardising a commonly used score, we introduce a new, more effective score, and introduce a novel score using an Input-Output Kernel Regression approach. Finally, we present NPLinker, a software framework to link genomic and metabolomic data. Results are verified using publicly available data sets that include validated links.
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Affiliation(s)
| | - Andrew Ramsay
- School of Computing Science, University of Glasgow, Glasgow, United Kingdom
| | | | - Katherine R. Duncan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, United Kingdom
| | - Sylvia Soldatou
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, United Kingdom
| | - Juho Rousu
- Department of Computer Science, Aalto University, Espoo, Finland
| | - Rónán Daly
- Glasgow Polyomics, University of Glasgow, Glasgow, United Kingdom
| | - Joe Wandy
- Glasgow Polyomics, University of Glasgow, Glasgow, United Kingdom
| | - Simon Rogers
- School of Computing Science, University of Glasgow, Glasgow, United Kingdom
- * E-mail:
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8
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Qader MM, Hamed AA, Soldatou S, Abdelraof M, Elawady ME, Hassane ASI, Belbahri L, Ebel R, Rateb ME. Antimicrobial and Antibiofilm Activities of the Fungal Metabolites Isolated from the Marine Endophytes Epicoccum nigrum M13 and Alternaria alternata 13A. Mar Drugs 2021; 19:md19040232. [PMID: 33924262 PMCID: PMC8074750 DOI: 10.3390/md19040232] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [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: 03/24/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 01/15/2023] Open
Abstract
Epicotripeptin (1), a new cyclic tripeptide along with four known cyclic dipeptides (2-5) and one acetamide derivative (6) were isolated from seagrass-associated endophytic fungus Epicoccum nigrum M13 recovered from the Red Sea. Additionally, two new compounds, cyclodidepsipeptide phragamide A (7) and trioxobutanamide derivative phragamide B (8), together with eight known compounds (9-16), were isolated from plant-derived endophyte Alternaria alternata 13A collected from a saline lake of Wadi El Natrun depression in the Sahara Desert. The structures of the isolated compounds were determined based on the 1D and 2D NMR spectroscopic data, HRESIMS data, and a comparison with the reported literature. The absolute configurations of 1 and 7 were established by advanced Marfey's and Mosher's ester analyses. The antimicrobial screening indicated that seven of the tested compounds exhibited considerable (MIC range of 2.5-5 µg/mL) to moderate (10-20 µg/mL) antibacterial effect against the tested Gram-positive strains and moderate to weak (10-30 µg/mL) antibacterial effect against Gram-negative strains. Most of the compounds exhibited weak or no activity against the tested Gram-negative strains. On the other hand, four of the tested compounds showed considerable antibiofilm effects against biofilm forming Gram-positive and Gram-negative strains.
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Affiliation(s)
- M. Mallique Qader
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- National Institute of Fundamental Studies, Hantana Road, Kandy 20000, Sri Lanka
| | - Ahmed A. Hamed
- National Research Centre, Microbial Chemistry Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.A.)
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK;
| | - Mohamed Abdelraof
- National Research Centre, Microbial Chemistry Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.A.)
| | - Mohamed E. Elawady
- National Research Centre, Microbial Biotechnology Department, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt;
| | - Ahmed S. I. Hassane
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- Aberdeen Royal Infirmary, Foresterhill Health Campus, Aberdeen AB25 2ZN, UK
| | - Lassaad Belbahri
- Laboratory of Soil Biology, University of Neuchatel, 2000 Neuchatel, Switzerland;
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK;
- Correspondence: (R.E.); (M.E.R.); Tel.: +44-1224-272930 (R.E.); +44-141-8483072 (M.E.R.)
| | - Mostafa E. Rateb
- School of Computing, Engineering, & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (A.S.I.H.)
- Correspondence: (R.E.); (M.E.R.); Tel.: +44-1224-272930 (R.E.); +44-141-8483072 (M.E.R.)
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9
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Santos AA, Soldatou S, de Magalhães VF, Azevedo SMFO, Camacho-Muñoz D, Lawton LA, Edwards C. Degradation of Multiple Peptides by Microcystin-Degrader Paucibacter toxinivorans (2C20). Toxins (Basel) 2021; 13:265. [PMID: 33917728 PMCID: PMC8068134 DOI: 10.3390/toxins13040265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 02/19/2021] [Revised: 04/03/2021] [Accepted: 04/04/2021] [Indexed: 11/16/2022] Open
Abstract
Since conventional drinking water treatments applied in different countries are inefficient at eliminating potentially toxic cyanobacterial peptides, a number of bacteria have been studied as an alternative to biological filters for the removal of microcystins (MCs). Here, we evaluated the degradation of not only MCs variants (-LR/DM-LR/-RR/-LF/-YR), but also non-MCs peptides (anabaenopeptins A/B, aerucyclamides A/D) by Paucibactertoxinivorans over 7 days. We also evaluated the degradation rate of MC-LR in a peptide mix, with all peptides tested, and in the presence of M. aeruginosa crude extract. Furthermore, biodegradation was assessed for non-cyanobacterial peptides with different chemical structures, such as cyclosporin A, (Glu1)-fibrinopeptide-B, leucine-enkephalin, and oxytocin. When cyanopeptides were individually added, P. toxinivorans degraded them (99%) over 7 days, except for MC-LR and -RR, which decreased by about 85 and 90%, respectively. The degradation rate of MC-LR decreased in the peptide mix compared to an individual compound, however, in the presence of the Microcystis extract, it was degraded considerably faster (3 days). It was noted that biodegradation rates decreased in the mix for all MCs while non-MCs peptides were immediately degraded. UPLC-QTOF-MS/MS allowed us to identify two linear biodegradation products for MC-LR and MC-YR, and one for MC-LF. Furthermore, P. toxinivorans demonstrated complete degradation of non-cyanobacterial peptides, with the exception of oxytocin, where around 50% remained after 7 days. Thus, although P. toxinivorans was previously identified as a MC-degrader, it also degrades a wide range of peptides under a range of conditions, which could be optimized as a potential biological tool for water treatment.
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Affiliation(s)
- Allan A. Santos
- Biophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, Brazil; (V.F.d.M.); (S.M.F.O.A.)
- School of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UK; (S.S.); (D.C.-M.); (L.A.L.); (C.E.)
| | - Sylvia Soldatou
- School of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UK; (S.S.); (D.C.-M.); (L.A.L.); (C.E.)
| | - Valeria Freitas de Magalhães
- Biophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, Brazil; (V.F.d.M.); (S.M.F.O.A.)
| | - Sandra M. F. O. Azevedo
- Biophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, Brazil; (V.F.d.M.); (S.M.F.O.A.)
| | - Dolores Camacho-Muñoz
- School of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UK; (S.S.); (D.C.-M.); (L.A.L.); (C.E.)
| | - Linda A. Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UK; (S.S.); (D.C.-M.); (L.A.L.); (C.E.)
| | - Christine Edwards
- School of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UK; (S.S.); (D.C.-M.); (L.A.L.); (C.E.)
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10
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Soldatou S, Eldjárn GH, Ramsay A, van der Hooft JJJ, Hughes AH, Rogers S, Duncan KR. Comparative Metabologenomics Analysis of Polar Actinomycetes. Mar Drugs 2021; 19:103. [PMID: 33578887 PMCID: PMC7916644 DOI: 10.3390/md19020103] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 01/21/2021] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 12/16/2022] Open
Abstract
Biosynthetic and chemical datasets are the two major pillars for microbial drug discovery in the omics era. Despite the advancement of analysis tools and platforms for multi-strain metabolomics and genomics, linking these information sources remains a considerable bottleneck in strain prioritisation and natural product discovery. In this study, molecular networking of the 100 metabolite extracts derived from applying the OSMAC approach to 25 Polar bacterial strains, showed growth media specificity and potential chemical novelty was suggested. Moreover, the metabolite extracts were screened for antibacterial activity and promising selective bioactivity against drug-persistent pathogens such as Klebsiella pneumoniae and Acinetobacter baumannii was observed. Genome sequencing data were combined with metabolomics experiments in the recently developed computational approach, NPLinker, which was used to link BGC and molecular features to prioritise strains for further investigation based on biosynthetic and chemical information. Herein, we putatively identified the known metabolites ectoine and chrloramphenicol which, through NPLinker, were linked to their associated BGCs. The metabologenomics approach followed in this study can potentially be applied to any large microbial datasets for accelerating the discovery of new (bioactive) specialised metabolites.
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Affiliation(s)
- Sylvia Soldatou
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (S.S.); (A.H.H.)
| | | | - Andrew Ramsay
- School of Computing Science, University of Glasgow, Glasgow G12 8RZ, UK; (G.H.E.); (A.R.); (S.R.)
| | | | - Alison H. Hughes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (S.S.); (A.H.H.)
| | - Simon Rogers
- School of Computing Science, University of Glasgow, Glasgow G12 8RZ, UK; (G.H.E.); (A.R.); (S.R.)
| | - Katherine R. Duncan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (S.S.); (A.H.H.)
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11
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Hamed AA, Soldatou S, Qader MM, Arjunan S, Miranda KJ, Casolari F, Pavesi C, Diyaolu OA, Thissera B, Eshelli M, Belbahri L, Luptakova L, Ibrahim NA, Abdel-Aziz MS, Eid BM, Ghareeb MA, Rateb ME, Ebel R. Screening Fungal Endophytes Derived from Under-Explored Egyptian Marine Habitats for Antimicrobial and Antioxidant Properties in Factionalised Textiles. Microorganisms 2020; 8:microorganisms8101617. [PMID: 33096635 PMCID: PMC7594075 DOI: 10.3390/microorganisms8101617] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 09/24/2020] [Revised: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 12/23/2022] Open
Abstract
Marine endophytic fungi from under-explored locations are a promising source for the discovery of new bioactivities. Different endophytic fungi were isolated from plants and marine organisms collected from Wadi El-Natrun saline lakes and the Red Sea near Hurghada, Egypt. The isolated strains were grown on three different media, and their ethyl acetate crude extracts were evaluated for their antimicrobial activity against a panel of pathogenic bacteria and fungi as well as their antioxidant properties. Results showed that most of the 32 fungal isolates initially obtained possessed antimicrobial and antioxidant activities. The most potent antimicrobial extracts were applied to three different cellulose containing fabrics to add new multifunctional properties such as ultraviolet protection and antimicrobial functionality. For textile safety, the toxicity profile of the selected fungal extract was evaluated on human fibroblasts. The 21 strains displaying bioactivity were identified on molecular basis and selected for chemical screening and dereplication, which was carried out by analysis of the MS/MS data using the Global Natural Products Social Molecular Networking (GNPS) platform. The obtained molecular network revealed molecular families of compounds commonly produced by fungal strains, and in combination with manual dereplication, further previously reported metabolites were identified as well as potentially new derivatives.
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Affiliation(s)
- Ahmed A. Hamed
- Microbial Chemistry Department, National Research Centre, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.S.A.-A.)
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - M. Mallique Qader
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (B.T.); (M.E.)
- National Institute of Fundamental Studies, Hantana Road, Kandy 20000, Sri Lanka
| | - Subha Arjunan
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - Kevin Jace Miranda
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
- College of Pharmacy, Adamson University, 900 San Marcelino Street, Manila 1000, Philippines
| | - Federica Casolari
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - Coralie Pavesi
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - Oluwatofunmilay A. Diyaolu
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
| | - Bathini Thissera
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (B.T.); (M.E.)
| | - Manal Eshelli
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (B.T.); (M.E.)
- Food Science & Technology Department, Faculty of Agriculture, University of Tripoli, Tripoli 13538, Libya
| | - Lassaad Belbahri
- Laboratory of Soil Biology, University of Neuchatel, 2000 Neuchatel, Switzerland;
| | - Lenka Luptakova
- Department of Biology and Genetics, Institute of Biology, Zoology and Radiobiology, University of Veterinary Medicine and Pharmacy, 04181 Kosice, Slovakia;
| | - Nabil A. Ibrahim
- Textile Research Division, National Research Centre, Scopus Affiliation ID 60014618, 33 EL Buhouth St., Dokki, Giza 12622, Egypt; (N.A.I.); (B.M.E.)
| | - Mohamed S. Abdel-Aziz
- Microbial Chemistry Department, National Research Centre, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt; (A.A.H.); (M.S.A.-A.)
| | - Basma M. Eid
- Textile Research Division, National Research Centre, Scopus Affiliation ID 60014618, 33 EL Buhouth St., Dokki, Giza 12622, Egypt; (N.A.I.); (B.M.E.)
| | - Mosad A. Ghareeb
- Medicinal Chemistry Department, Theodor Bilharz Research Institute, Kornaish El Nile, Warrak El-Hadar, Imbaba, Giza 12411, Egypt;
| | - Mostafa E. Rateb
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK; (M.M.Q.); (B.T.); (M.E.)
- Correspondence: (M.E.R.); (R.E.); Tel.: +44-141-8483072 (M.E.R.); +44-1224-272930 (R.E.)
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (S.S.); (S.A.); (K.J.M.); (F.C.); (C.P.); (O.A.D.)
- Correspondence: (M.E.R.); (R.E.); Tel.: +44-141-8483072 (M.E.R.); +44-1224-272930 (R.E.)
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12
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Soldatou S, Jaykumar A, H.A.S.N A, M. Manage P, Mašek O, A. Lawton L, Edwards C. Safe water for all: A nature-based approach for cyanotoxin elimination from potable water. Access Microbiol 2020. [DOI: 10.1099/acmi.ac2020.po0574] [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: 11/18/2022] Open
Abstract
Cyanobacterial blooms are a serious threat to public health and water quality due to the production of cyanotoxins as a result of nutrient pollution from industry, agriculture, domestic waste as well as global warming. The microcystins (MCs) are the most abundant cyanotoxins consisting of >200 analogues causing both acute and chronic toxicity, sometimes resulting in death. In Asian countries, such as Sri Lanka, reports of kidney disease are constantly increasing. Although no direct link between metal and pesticide contamination in water and kidney disease has been found, high concentration of cyanobacteria cells in drinking water wells implies that the nephrotoxic effects of cyanotoxins might play a key factor in the reports of Chronic Kidney Disease of unknown aetiology (CKDu) in Sri Lanka. Therefore, we propose a nature-based approach for water treatment which will study the hypotheses that cyanotoxins can cause CKDu. Sri Lankan bacterial isolates (Alcaligens sp., Roseateles sp., Bacillus sp., and Micrococcus sp.) known to degrade microcystins, were used to form biofilm on biochar from Sri Lankan crop residues, such as coconut shells. The immobilisation of the microbes was assessed via a high-throughput colourimetric assay, followed by monitoring the biodegradation rate of microcystins when added to the immobilised cultures. Biodegradation products were analysed and identified through molecular networking and quantified via LC-MS/MS. Ultimately, this project will provide safe water in line with UN Sustainable Development Goal 6.1 as well contributing in sustainable goals 7 (Affordable and Clean Energy), 11 (Sustainable Cities and Communities) and 12 (Responsible Production and Consumption).
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Affiliation(s)
- Sylvia Soldatou
- School of Pharmacy and Life Sciences,Robert Gordon University,Aberdeen
| | | | - Abeysiri H.A.S.N
- Centre for Water Quality and Algae Research,Department of Zoology,University of Sri Jayewardenepura
| | - Pathmalal M. Manage
- Centre for Water Quality and Algae Research,Department of Zoology,University of Sri Jayewardenepura
| | - Ondřej Mašek
- School of GeoSciences,University of Edinburgh,Edinburgh
| | - Linda A. Lawton
- School of Pharmacy and Life Sciences,Robert Gordon University,Aberdeen
| | - Christine Edwards
- School of Pharmacy and Life Sciences,Robert Gordon University,Aberdeen
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13
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Soldatou S, Eldjarn GH, Huerta-Uribe A, Rogers S, Duncan KR. Linking biosynthetic and chemical space to accelerate microbial secondary metabolite discovery. FEMS Microbiol Lett 2020; 366:5525086. [PMID: 31252431 PMCID: PMC6697067 DOI: 10.1093/femsle/fnz142] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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: 04/24/2019] [Accepted: 07/19/2019] [Indexed: 12/17/2022] Open
Abstract
Secondary metabolites can be viewed as a chemical language, facilitating communication between microorganisms. From an ecological point of view, this metabolite exchange is in constant flux due to evolutionary and environmental pressures. From a biomedical perspective, the chemistry is unsurpassed for its antibiotic properties. Genome sequencing of microorganisms has revealed a large reservoir of Biosynthetic Gene Clusters (BGCs); however, linking these to the secondary metabolites they encode is currently a major bottleneck to chemical discovery. This linking of genes to metabolites with experimental validation will aid the elicitation of silent or cryptic (not expressed under normal laboratory conditions) BGCs. As a result, this will accelerate chemical dereplication, our understanding of gene transcription and provide a comprehensive resource for synthetic biology. This will ultimately provide an improved understanding of both the biosynthetic and chemical space. In recent years, integrating these complex metabolomic and genomic data sets has been achieved using a spectrum of manual and automated approaches. In this review, we cover examples of these approaches, while addressing current challenges and future directions in linking these data sets.
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Affiliation(s)
- Sylvia Soldatou
- Department of Chemistry, University of Aberdeen, Aberdeen, UK. AB24 3UE
| | | | - Alejandro Huerta-Uribe
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK. G4 0RE
| | - Simon Rogers
- School of Computing Science, University of Glasgow, Glasgow, UK. G12 8RZ
| | - Katherine R Duncan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK. G4 0RE
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14
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Murúa P, Edrada-Ebel R, Muñoz L, Soldatou S, Legrave N, Müller DG, Patiño DJ, van West P, Küpper FC, Westermeier R, Ebel R, Peters AF. Morphological, genotypic and metabolomic signatures confirm interfamilial hybridization between the ubiquitous kelps Macrocystis (Arthrothamnaceae) and Lessonia (Lessoniaceae). Sci Rep 2020; 10:8279. [PMID: 32427928 PMCID: PMC7237481 DOI: 10.1038/s41598-020-65137-3] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 04/28/2020] [Indexed: 01/20/2023] Open
Abstract
Macrocystis pyrifera and Lessonia spicata are economically and ecologically relevant brown seaweeds that recently have been classified as members of two separated families within Laminariales (kelps). Here we describe for the first time the Macrocystis pyrifera x Lessonia spicata hybridization in the wild (Chiloe Island, Southeastern Pacific), where populations of the two parents exist sympatrically. Externally, this hybrid exhibited typical features of its parents M. pyrifera (cylindrical and flexible distal stipes, serrate frond margins and presence of sporophylls) and L. spicata (rigid and flat main stipe and first bifurcation), as well as intermediate features between them (thick unfused haptera in the holdfast). Histological sections revealed the prevalence of mucilage ducts within stipes and fronds (absent in Lessonia) and fully developed unilocular sporangia in the sporophylls. Molecular analyses confirmed the presence of the two parental genotypes for ITS1 nrDNA and the M. pyrifera genotype for two predominantly maternally inherited cytoplasmic markers (COI and rbcLS spacer) in the tissue of the hybrid. A metabolome-wide approach revealed that this hybrid is more chemically reminiscent to M. pyrifera. Nevertheless, several hits were identified as Lessonia exclusive or more remarkably, not present in any of the parent. Meiospores developed into apparently fertile gametophytes, which gave rise to F1 sporophytes that reached several millimeters before suddenly dying. In-vitro reciprocal crossing of Mar Brava gametophytes from both species revealed that although it is rare, interfamilial hybridization between the two species is possible but mostly overcome by pseudogamy of female gametophytes.
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Affiliation(s)
- Pedro Murúa
- Instituto de Acuicultura, Universidad Austral de Chile, Sede Puerto Montt, PO box 1327, Puerto Montt, Chile.
- The Scottish Association for Marine Science, Scottish Marine Institute, Culture Collection for Algae and Protozoa, Oban, Argyll, PA37 1QA, Scotland, United Kingdom.
- Aberdeen Oomycete Group, College of Life Sciences and Medicine, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom.
| | - RuAngelie Edrada-Ebel
- The Natural Products Metabolomics Group, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, The John Arbuthnott Building, 161 Cathedral Street, Glasgow, G4 0RE, United Kingdom
| | - Liliana Muñoz
- Aberdeen Oomycete Group, College of Life Sciences and Medicine, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Building, Meston Walk, Old Aberdeen, AB24 3UE, United Kingdom
| | - Nathalie Legrave
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Building, Meston Walk, Old Aberdeen, AB24 3UE, United Kingdom
| | - Dieter G Müller
- Fachbereich Biologie der Universität Konstanz, D-78457, Konstanz, Germany
| | - David J Patiño
- Instituto de Acuicultura, Universidad Austral de Chile, Sede Puerto Montt, PO box 1327, Puerto Montt, Chile
| | - Pieter van West
- Aberdeen Oomycete Group, College of Life Sciences and Medicine, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom
| | - Frithjof C Küpper
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Building, Meston Walk, Old Aberdeen, AB24 3UE, United Kingdom
- School of Biological Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK
| | - Renato Westermeier
- Instituto de Acuicultura, Universidad Austral de Chile, Sede Puerto Montt, PO box 1327, Puerto Montt, Chile
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Building, Meston Walk, Old Aberdeen, AB24 3UE, United Kingdom
| | - Akira F Peters
- School of Biological Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, Scotland, UK
- Bezhin Rosko, 40 rue des pêcheurs, 29250, Santec, Brittany, France
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15
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Millán-Aguiñaga N, Soldatou S, Brozio S, Munnoch JT, Howe J, Hoskisson PA, Duncan KR. Awakening ancient polar Actinobacteria: diversity, evolution and specialized metabolite potential. Microbiology (Reading) 2020; 165:1169-1180. [PMID: 31592756 DOI: 10.1099/mic.0.000845] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polar and subpolar ecosystems are highly vulnerable to global climate change with consequences for biodiversity and community composition. Bacteria are directly impacted by future environmental change and it is therefore essential to have a better understanding of microbial communities in fluctuating ecosystems. Exploration of Polar environments, specifically sediments, represents an exciting opportunity to uncover bacterial and chemical diversity and link this to ecosystem and evolutionary parameters. In terms of specialized metabolite production, the bacterial order Actinomycetales, within the phylum Actinobacteria are unsurpassed, producing 10 000 specialized metabolites accounting for over 45 % of all bioactive microbial metabolites. A selective isolation approach focused on spore-forming Actinobacteria of 12 sediment cores from the Antarctic and sub-Arctic generated a culture collection of 50 strains. This consisted of 39 strains belonging to rare A ctinomycetales genera including Microbacterium, Rhodococcus and Pseudonocardia. This study used a combination of nanopore sequencing and molecular networking to explore the community composition, culturable bacterial diversity, evolutionary relatedness and specialized metabolite potential of these strains. Metagenomic analyses using MinION sequencing was able to detect the phylum Actinobacteria across polar sediment cores at an average of 13 % of the total bacterial reads. The resulting molecular network consisted of 1652 parent ions and the lack of known metabolite identification supports the argument that Polar bacteria are likely to produce previously unreported chemistry.
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Affiliation(s)
- Natalie Millán-Aguiñaga
- Universidad Autónoma de Baja California, Facultad de Ciencias Marinas, Ensenada, Baja California, México
| | - Sylvia Soldatou
- University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Science, Glasgow, UK
| | - Sarah Brozio
- University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Science, Glasgow, UK
| | - John T Munnoch
- University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Science, Glasgow, UK
| | - John Howe
- The Scottish Association for Marine Science, The Scottish Marine Institute, ObanArgyll, UK
| | - Paul A Hoskisson
- University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Science, Glasgow, UK
| | - Katherine R Duncan
- University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Science, Glasgow, UK
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van Santen J, Jacob G, Singh AL, Aniebok V, Balunas MJ, Bunsko D, Neto FC, Castaño-Espriu L, Chang C, Clark TN, Cleary Little JL, Delgadillo DA, Dorrestein PC, Duncan KR, Egan JM, Galey MM, Haeckl FJ, Hua A, Hughes AH, Iskakova D, Khadilkar A, Lee JH, Lee S, LeGrow N, Liu DY, Macho JM, McCaughey CS, Medema MH, Neupane RP, O’Donnell TJ, Paula JS, Sanchez LM, Shaikh AF, Soldatou S, Terlouw BR, Tran TA, Valentine M, van der Hooft JJJ, Vo DA, Wang M, Wilson D, Zink KE, Linington RG. The Natural Products Atlas: An Open Access Knowledge Base for Microbial Natural Products Discovery. ACS Cent Sci 2019; 5:1824-1833. [PMID: 31807684 PMCID: PMC6891855 DOI: 10.1021/acscentsci.9b00806] [Citation(s) in RCA: 212] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Indexed: 05/06/2023]
Abstract
Despite rapid evolution in the area of microbial natural products chemistry, there is currently no open access database containing all microbially produced natural product structures. Lack of availability of these data is preventing the implementation of new technologies in natural products science. Specifically, development of new computational strategies for compound characterization and identification are being hampered by the lack of a comprehensive database of known compounds against which to compare experimental data. The creation of an open access, community-maintained database of microbial natural product structures would enable the development of new technologies in natural products discovery and improve the interoperability of existing natural products data resources. However, these data are spread unevenly throughout the historical scientific literature, including both journal articles and international patents. These documents have no standard format, are often not digitized as machine readable text, and are not publicly available. Further, none of these documents have associated structure files (e.g., MOL, InChI, or SMILES), instead containing images of structures. This makes extraction and formatting of relevant natural products data a formidable challenge. Using a combination of manual curation and automated data mining approaches we have created a database of microbial natural products (The Natural Products Atlas, www.npatlas.org) that includes 24 594 compounds and contains referenced data for structure, compound names, source organisms, isolation references, total syntheses, and instances of structural reassignment. This database is accompanied by an interactive web portal that permits searching by structure, substructure, and physical properties. The Web site also provides mechanisms for visualizing natural products chemical space and dashboards for displaying author and discovery timeline data. These interactive tools offer a powerful knowledge base for natural products discovery with a central interface for structure and property-based searching and presents new viewpoints on structural diversity in natural products. The Natural Products Atlas has been developed under FAIR principles (Findable, Accessible, Interoperable, and Reusable) and is integrated with other emerging natural product databases, including the Minimum Information About a Biosynthetic Gene Cluster (MIBiG) repository, and the Global Natural Products Social Molecular Networking (GNPS) platform. It is designed as a community-supported resource to provide a central repository for known natural product structures from microorganisms and is the first comprehensive, open access resource of this type. It is expected that the Natural Products Atlas will enable the development of new natural products discovery modalities and accelerate the process of structural characterization for complex natural products libraries.
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Affiliation(s)
- Jeffrey
A. van Santen
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Grégoire Jacob
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Amrit Leen Singh
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Victor Aniebok
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 65064, United States
| | - Marcy J. Balunas
- Division
of Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Derek Bunsko
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Fausto Carnevale Neto
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Physics
and Chemistry Department, School of Pharmaceutical Sciences of Ribeirão
Preto, University of São Paulo, Ribeirão Preto, São
Paulo 14040, Brazil
- Northwest
Metabolomics Research Center, Department of Anesthesiology and Pain
Medicine, University of Washington, Seattle, Washington 98109, United States
| | - Laia Castaño-Espriu
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, United Kingdom
| | - Chen Chang
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Trevor N. Clark
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Jessica L. Cleary Little
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - David A. Delgadillo
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 65064, United States
| | - Pieter C. Dorrestein
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Sciences, University of California
San Diego, La Jolla, California 92037, United States
| | - Katherine R. Duncan
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, United Kingdom
| | - Joseph M. Egan
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Melissa M. Galey
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - F.P. Jake Haeckl
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Alex Hua
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Alison H. Hughes
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, United Kingdom
| | - Dasha Iskakova
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Aswad Khadilkar
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 65064, United States
| | - Jung-Ho Lee
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Sanghoon Lee
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Nicole LeGrow
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Dennis Y. Liu
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Jocelyn M. Macho
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 65064, United States
| | - Catherine S. McCaughey
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Marnix H. Medema
- Bioinformatics
Group, Wageningen University, 6700 AP Wageningen, The Netherlands
| | - Ram P. Neupane
- Department
of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Timothy J. O’Donnell
- Department
of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Jasmine S. Paula
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Laura M. Sanchez
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Anam F. Shaikh
- Department
of Biochemistry, University of Texas Southwestern
Medical Center, Dallas, Texas 75390, United
States
| | - Sylvia Soldatou
- Strathclyde
Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, United Kingdom
| | - Barbara R. Terlouw
- Bioinformatics
Group, Wageningen University, 6700 AP Wageningen, The Netherlands
| | - Tuan Anh Tran
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
- Institute of Marine Biochemistry, Vietnam
Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
| | - Mercia Valentine
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | | | - Duy A. Vo
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 65064, United States
| | - Mingxun Wang
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Sciences, University of California
San Diego, La Jolla, California 92037, United States
| | - Darryl Wilson
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Katherine E. Zink
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Roger G. Linington
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- E-mail: . Tel: +1-778-7823517
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17
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Maglangit F, Fang Q, Leman V, Soldatou S, Ebel R, Kyeremeh K, Deng H. Accramycin A, a New Aromatic Polyketide, from the Soil Bacterium, Streptomyces sp. MA37. Molecules 2019; 24:molecules24183384. [PMID: 31533358 PMCID: PMC6767120 DOI: 10.3390/molecules24183384] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 08/16/2019] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 11/17/2022] Open
Abstract
Drug-like molecules are known to contain many different building blocks with great potential as pharmacophores for drug discovery. The continued search for unique scaffolds in our laboratory led to the isolation of a novel Ghanaian soil bacterium, Streptomyces sp. MA37. This strain produces many bioactive molecules, most of which belong to carbazoles, pyrrolizidines, and fluorinated metabolites. Further probing of the metabolites of MA37 has led to the discovery of a new naphthacene-type aromatic natural product, which we have named accramycin A 1. This molecule was isolated using an HPLC-photodiode array (PDA) guided isolation process and MS/MS molecular networking. The structure of 1 was characterized by detailed analysis of LC-MS, UV, 1D, and 2D NMR data. Preliminary studies on the antibacterial properties of 1 using Group B Streptococcus (GBS) produced a minimum inhibitory concentration (MIC) of 27 µg/mL. This represents the first report of such bioactivity amongst the naphthacene-type aromatic polyketides, and also suggests the possibility for the further development of potent molecules against GBS based on the accramycin scaffold. A putative acc biosynthetic pathway for accramycin, featuring a tridecaketide-specific type II polyketide synthase, was proposed.
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Affiliation(s)
- Fleurdeliz Maglangit
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK.
- College of Science, University of the Philippines Cebu, Lahug, Cebu City 6000, Philippines.
| | - Qing Fang
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK.
| | - Valentin Leman
- Organic Chemistry Division, SIGMA Clermont, 27, Rue Roche Genes, 63170 Aubiere, France.
| | - Sylvia Soldatou
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK.
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK.
| | - Kwaku Kyeremeh
- Department of Chemistry, University of Ghana, P.O. Box LG56, Legon-Accra, Ghana.
| | - Hai Deng
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland, UK.
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18
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Abstract
This is an update report on marine natural products isolated from cold-water organisms in the last decade, following the previous review that covered the literature up to 2005. Emphasis is on structural assignments and biological activity.
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Affiliation(s)
- Sylvia Soldatou
- School of Chemistry
- National University of Ireland
- Galway
- Ireland
- Department of Chemistry
| | - Bill J. Baker
- School of Chemistry
- National University of Ireland
- Galway
- Ireland
- Department of Chemistry
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19
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Smyrniotopoulos V, Rae M, Soldatou S, Ding Y, Wolff CW, McCormack G, Coleman CM, Ferreira D, Tasdemir D. Sulfated steroid-amino acid conjugates from the Irish marine sponge Polymastia boletiformis. Mar Drugs 2015; 13:1632-46. [PMID: 25812034 PMCID: PMC4413178 DOI: 10.3390/md13041632] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 12/12/2014] [Revised: 02/23/2015] [Accepted: 03/16/2015] [Indexed: 11/16/2022] Open
Abstract
Antifungal bioactivity-guided fractionation of the organic extract of the sponge Polymastia boletiformis, collected from the west coast of Ireland, led to the isolation of two new sulfated steroid-amino acid conjugates (1 and 2). Extensive 1D and 2D NMR analyses in combination with quantum mechanical calculations of the electronic circular dichroism (ECD) spectra, optical rotation, and 13C chemical shifts were used to establish the chemical structures of 1 and 2. Both compounds exhibited moderate antifungal activity against Cladosporium cucumerinum, while compound 2 was also active against Candida albicans. Marine natural products containing steroidal and amino acid constituents are extremely rare in nature.
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Affiliation(s)
| | - Margaret Rae
- Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland.
- Marine Biodiscovery Laboratory, Marine Institute, Rinville, Oranmore, Co. Galway, Ireland.
| | - Sylvia Soldatou
- School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland.
| | - Yuanqing Ding
- Department of BioMolecular Sciences, Division of Pharmacognosy, and the National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, MS 38677, USA.
| | - Carsten W Wolff
- Zoology, Ryan Institute, School of Natural Sciences, National University of Ireland Galway, University Road, Galway, Ireland.
| | - Grace McCormack
- Zoology, Ryan Institute, School of Natural Sciences, National University of Ireland Galway, University Road, Galway, Ireland.
| | - Christina M Coleman
- Department of BioMolecular Sciences, Division of Pharmacognosy, and the National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, MS 38677, USA.
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, and the National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, MS 38677, USA.
| | - Deniz Tasdemir
- School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland.
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