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Moreno K, Rico DM, Middlebrooks M, Medrano S, Valdés ÁA, Krug PJ. A cryptic radiation of Caribbean sea slugs revealed by integrative analysis: Cyerce ' antillensis' (Sacoglossa: Caliphyllidae) is six distinct species. Zool J Linn Soc 2024; 200:940-979. [PMID: 38566915 PMCID: PMC10983082 DOI: 10.1093/zoolinnean/zlad111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/14/2023] [Accepted: 07/31/2023] [Indexed: 04/04/2024]
Abstract
Integrative studies have revealed cryptic radiations in several Caribbean lineages of heterobranch sea slugs, raising questions about the evolutionary mechanisms that promote speciation within the tropical Western Atlantic. Cyerce Bergh, 1871 is a genus comprising 12 named species in the family Caliphyllidae that lack the photosynthetic ability of other sacoglossans but are noted for vibrant colours on the large cerata (dorsal leaf-like appendages) that characterize many species. Two species are widely reported from the Caribbean: Cyerce cristallina (Trinchese, 1881) and Cyerce antillensis Engel, 1927. Here, we present an integrative assessment of diversity in Caribbean Cyerce. Four methods of molecular species delimitation supported seven species in samples from the Caribbean and adjacent subtropical Western Atlantic. Six delimited species formed a monophyletic lineage in phylogenetic analyses but were > 9% divergent at the barcoding COI locus and could be differentiated using ecological, reproductive and/or morphological traits. We redescribe C. antillensis, a senior synonym for the poorly known Cyerce habanensis Ortea & Templado, 1988, and describe five new species. Evolutionary shifts in algal host use, penial armature and larval life history might have acted synergistically to promote the rapid divergence of endemic species with restricted distributions in this radiation, substantially increasing global diversity of the genus.
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Affiliation(s)
- Karina Moreno
- Department of Biological Sciences, California State Polytechnic UniversityPomona, Pomona, CA 91768, USA
| | - Diane M Rico
- Department of Biological Sciences, California State University, Los Angeles, CA 90032-8201, USA
| | | | - Sabrina Medrano
- Department of Biological Sciences, California State Polytechnic UniversityPomona, Pomona, CA 91768, USA
| | - Ángel A Valdés
- Department of Biological Sciences, California State Polytechnic UniversityPomona, Pomona, CA 91768, USA
| | - Patrick J Krug
- Department of Biological Sciences, California State University, Los Angeles, CA 90032-8201, USA
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2
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Zhang H, Zhang X, Huang Y, Yuan J, Wei X, Ju J. Discovery, Structure Correction, and Biosynthesis of Actinopyrones, Cytotoxic Polyketides from the Deep-Sea Hydrothermal-Vent-Derived Streptomyces sp. SCSIO ZS0520. JOURNAL OF NATURAL PRODUCTS 2022; 85:625-633. [PMID: 34852194 DOI: 10.1021/acs.jnatprod.1c00901] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Three new actinopyrone derivatives, actinopyrones E-G (1, 3, and 4), together with three known analogues, PM050463 (2), actinopyrone D (5), and PM050511 (6), were isolated from Streptomyces sp. SCSIO ZS0520 derived from a deep-sea hydrothermal vent. Their structures, complete with absolute configurations, were elucidated using extensive spectroscopic analyses combined with Mosher's method, ECD calculations, and bioinformatics analyses. These findings corrected the absolute configurations of previously reported actinopyrone analogues 2, 5, and 6 at C-3, C-9, and C-10. Notably, compound 6 displayed notable cytotoxicity against six human cell lines with IC50 values of 0.26-2.22 μM. A likely biosynthetic pathway and annotations of protein function are proposed on the basis of bioinformatics analyses. Genes coding for methyltransferase and glycosyltransferase tailoring chemistries needed to generate final structures were notably absent from the biosynthetic gene cluster. Taken together, these results enable further bioengineering of the actinopyrones and related congeners as potential antitumor agents.
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Affiliation(s)
- Huaran Zhang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
- College of Oceanology, University of Chinese Academy of Sciences, Qingdao 266400, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), No. 1119, Haibin Road, Nansha District, Guangzhou 511458, China
| | - Xuejia Zhang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
| | - Yun Huang
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jie Yuan
- Key Laboratory of Tropical Disease Control, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Xiaoyi Wei
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, China
| | - Jianhua Ju
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China
- College of Oceanology, University of Chinese Academy of Sciences, Qingdao 266400, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), No. 1119, Haibin Road, Nansha District, Guangzhou 511458, China
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3
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Avila C, Angulo-Preckler C. Bioactive Compounds from Marine Heterobranchs. Mar Drugs 2020; 18:657. [PMID: 33371188 PMCID: PMC7767343 DOI: 10.3390/md18120657] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 12/05/2020] [Accepted: 12/07/2020] [Indexed: 12/22/2022] Open
Abstract
The natural products of heterobranch molluscs display a huge variability both in structure and in their bioactivity. Despite the considerable lack of information, it can be observed from the recent literature that this group of animals possesses an astonishing arsenal of molecules from different origins that provide the molluscs with potent chemicals that are ecologically and pharmacologically relevant. In this review, we analyze the bioactivity of more than 450 compounds from ca. 400 species of heterobranch molluscs that are useful for the snails to protect themselves in different ways and/or that may be useful to us because of their pharmacological activities. Their ecological activities include predator avoidance, toxicity, antimicrobials, antifouling, trail-following and alarm pheromones, sunscreens and UV protection, tissue regeneration, and others. The most studied ecological activity is predation avoidance, followed by toxicity. Their pharmacological activities consist of cytotoxicity and antitumoral activity; antibiotic, antiparasitic, antiviral, and anti-inflammatory activity; and activity against neurodegenerative diseases and others. The most studied pharmacological activities are cytotoxicity and anticancer activities, followed by antibiotic activity. Overall, it can be observed that heterobranch molluscs are extremely interesting in regard to the study of marine natural products in terms of both chemical ecology and biotechnology studies, providing many leads for further detailed research in these fields in the near future.
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Affiliation(s)
- Conxita Avila
- Department of Evolutionary Biology, Ecology, and Environmental Sciences, Biodiversity Research Institute (IrBIO), Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Catalonia, Spain;
| | - Carlos Angulo-Preckler
- Department of Evolutionary Biology, Ecology, and Environmental Sciences, Biodiversity Research Institute (IrBIO), Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Catalonia, Spain;
- Norwegian College of Fishery Science, UiT The Arctic University of Norway, Hansine Hansens veg 18, 9019 Tromsø, Norway
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Chakraborty K, Joy M. High-value compounds from the molluscs of marine and estuarine ecosystems as prospective functional food ingredients: An overview. Food Res Int 2020; 137:109637. [PMID: 33233216 PMCID: PMC7457972 DOI: 10.1016/j.foodres.2020.109637] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/02/2020] [Accepted: 08/21/2020] [Indexed: 12/20/2022]
Abstract
Reviewed enthnomedical, nutritive and pharmacological profiles of molluscs. Gastropods and bivalves are potential sources of functional food. More than 1334 bioactive metabolites were reported from total of about 1287 publications. Molluscan derived metabolites were mostly belonged to terpenoids and sterols. Number of patents were increased to more than 30% during 2016–2019.
Extensive biodiversity and availability of marine and estuarine molluscs, along with their their wide-range of utilities as food and nutraceutical resources developed keen attention of the food technologists and dieticians, particularly during the recent years. The current review comprehensively summarized the nutritional qualities, functional food attributes, and bioactive properties of these organisms. Among the phylum mollusca, Cephalopoda, Bivalvia, and Gastropoda were mostly reported for their nutraceutical applications and bioactive properties. The online search tools, like Scifinder/Science Direct/PubMed/Google Scholar/MarinLit database and marine natural product reports (1984–2019) were used to comprehend the information about the molluscs. More than 1334 secondary metabolites were reported from marine molluscs between the periods from 1984 to 2019. Among various classes of specialized metabolites, terpenes were occupied by 55% in gastropods, whereas sterols occupied 41% in bivalves. The marketed nutraceuticals, such as CadalminTM green mussel extract (Perna viridis) and Lyprinol® (Perna canaliculus) were endowed with potential anti-inflammatory activities, and were used against arthritis. Molluscan-derived therapeutics, for example, ziconotide was used as an analgesic, and elisidepsin was used in the treatment of cancer. Greater numbers of granted patents (30%) during 2016–2019 recognized the increasing importance of bioactive compounds from molluscs. Consumption of molluscs as daily diets could be helpful in the enhancement of immunity, and reduce the risk of several ailments. The present review comprehended the high value compounds and functional food ingredients from marine and estuarine molluscs.
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Affiliation(s)
- Kajal Chakraborty
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No. 1603, Cochin-682018, Kerala, India.
| | - Minju Joy
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No. 1603, Cochin-682018, Kerala, India
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Sebhaoui J, El Bakri Y, Lai CH, Karthikeyan S, Anouar EH, Mague JT, Essassi EM. Unexpected synthesis of novel 2-pyrone derivatives: crystal structures, Hirshfeld surface analysis and computational studies. J Biomol Struct Dyn 2020; 39:4859-4877. [PMID: 32571166 DOI: 10.1080/07391102.2020.1780943] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Here we report synthesis of three new compounds namely, 1-acetyl-1H-benzimidazolo-2(3H)-one (I), N-(5-acetyl-6-methyl-2-oxo-2H-pyran-4-yl)-N-(2-acetamidophenyl)acetamide (II) and N-(2-acetamidophenyl)-N-2-oxo-2H-pyran-4-yl)acetamide (III) have been synthesized and characterized by single crystal X-ray diffraction. Compounds I and II crystallize in the monoclinic space groups P21/n, and P21/c, respectively, while III crystallizes in the triclinic space group P-1. The theoretical parameters of I-III have been calculated through density functional theory (DFT) by using the hybrid functional B3LYP and basis set 6-311++G**. These theoretical parameters have been compared with the experimental ones obtained by XRD. The significant intermolecular interactions arising in crystal packing are rationalized by means of the Hirshfeld surface analysis method. The major intermolecular contacts in the Hirshfeld surfaces of I-III are from H…H contacts. In addition, binding modes of I-III within Tyrosine-protein kinase JAK2 were investigated using molecular docking and molecular dynamics simulation studies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Jihad Sebhaoui
- Laboratoire de Chimie Organique Hétérocyclique, Centre de Recherche des Sciences des Médicaments, Pôle de Compétences Pharmacochimie, URAC 21, Faculté des Sciences, Mohammed V University Rabat, Rabat, Morocco
| | - Youness El Bakri
- Laboratoire de Chimie Organique Hétérocyclique, Centre de Recherche des Sciences des Médicaments, Pôle de Compétences Pharmacochimie, URAC 21, Faculté des Sciences, Mohammed V University Rabat, Rabat, Morocco.,South Ural State University, Chelyabinsk, Russian Federation
| | - Chin-Hung Lai
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Subramani Karthikeyan
- Organic Chemistry Department, Science Faculty, RUDN University, Moscow, Russian Federation
| | - El Hassane Anouar
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Joel T Mague
- Department of Chemistry, Tulane University, New Orleans, LA, USA
| | - El Mokhtar Essassi
- Laboratoire de Chimie Organique Hétérocyclique, Centre de Recherche des Sciences des Médicaments, Pôle de Compétences Pharmacochimie, URAC 21, Faculté des Sciences, Mohammed V University Rabat, Rabat, Morocco
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6
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Torres JP, Lin Z, Winter JM, Krug PJ, Schmidt EW. Animal biosynthesis of complex polyketides in a photosynthetic partnership. Nat Commun 2020; 11:2882. [PMID: 32513940 PMCID: PMC7280274 DOI: 10.1038/s41467-020-16376-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 04/29/2020] [Indexed: 11/09/2022] Open
Abstract
Complex polyketides are typically associated with microbial metabolism. Here, we report that animals also make complex, microbe-like polyketides. We show there is a widespread branch of fatty acid synthase- (FAS)-like polyketide synthase (PKS) proteins, which sacoglossan animals use to synthesize complex products. The purified sacogolassan protein EcPKS1 uses only methylmalonyl-CoA as a substrate, otherwise unknown in animal lipid metabolism. Sacoglossans are sea slugs, some of which eat algae, digesting the cells but maintaining functional chloroplasts. Here, we provide evidence that polyketides support this unusual photosynthetic partnership. The FAS-like PKS family represents an uncharacterized branch of polyketide and fatty acid metabolism, encoding a large diversity of biomedically relevant animal enzymes and chemicals awaiting discovery. The biochemical characterization of an intact animal polyketide biosynthetic enzyme opens the door to understanding the immense untapped metabolic potential of metazoans. Complex polyketides are usually produced by microbes, whereas the origin of polyketides found in animals remained unknown. This study shows that sacoglossan animals, such as sea slugs, employ fatty acid synthase-like proteins to produce microbe-like polyketides.
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Affiliation(s)
- Joshua P Torres
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Jaclyn M Winter
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Patrick J Krug
- Department of Biological Sciences, California State University, Los Angeles, CA, 90032, USA
| | - Eric W Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
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7
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Abstract
Marine natural products (MNPs) containing pyrone rings have been isolated
from numerous marine organisms, and also produced by marine fungi and bacteria, particularly,
actinomycetes. They constitute a versatile structure unit of bioactive natural
products that exhibit various biological activities such as antibiotic, antifungal, cytotoxic,
neurotoxic, phytotoxic and anti-tyrosinase. The two structure isomers of pyrone ring are γ-
pyrone and α-pyrone. In terms of chemical motif, γ-pyrone is the vinologous form of α-
pyrone which possesses a lactone ring. Actinomycete bacteria are responsible for the production
of several α-pyrone compounds such as elijopyrones A-D, salinipyrones and violapyrones
etc. to name a few. A class of pyrone metabolites, polypropionates which have
fascinating carbon skeleton, is primarily produced by marine molluscs. Interestingly, some
of the pyrone polytketides which are found in cone snails are actually synthesized by actinomycete bacteria.
Several pyrone derivatives have been obtained from marine fungi such as Aspergillums flavus, Altenaria sp.,
etc. The γ-pyrone derivative namely, kojic acid obtained from Aspergillus fungus has high commercial demand
and finds various applications. Kojic acid and its derivative displayed inhibition of tyrosinase activity and, it is
also extensively used as a ligand in coordination chemistry. Owing to their commercial and biological significance,
the synthesis of pyrone containing compounds has been given attention over the past years. Few reviews
on the total synthesis of pyrone containing natural products namely, polypropionate metabolites have been reported.
However, these reviews skipped other marine pyrone metabolites and also omitted discussion on isolation
and detailed biological activities. This review presents a brief account of the isolation of marine metabolites
containing a pyrone ring and their reported bio-activities. Further, the review covers the synthesis of marine
pyrone metabolites such as cyercene-A, placidenes, onchitriol-I, onchitriol-II, crispatene, photodeoxytrichidione,
(-) membrenone-C, lihualide-B, macrocyclic enol ethers and auripyrones-A & B.
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Affiliation(s)
- Keisham S. Singh
- Bio-organic Chemistry Laboratory, CSIR-National Institute of Oceanography, Dona Paula-403004, Goa, India
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8
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Abdelhameed RFA, Habib ES, Eltahawy NA, Hassanean HA, Ibrahim AK, Mohammed AF, Fayez S, Hayallah AM, Yamada K, Behery FA, Al-Sanea MM, Alzarea SI, Bringmann G, Ahmed SA, Abdelmohsen UR. New Cytotoxic Natural Products from the Red Sea Sponge Stylissa carteri. Mar Drugs 2020; 18:md18050241. [PMID: 32375235 PMCID: PMC7281077 DOI: 10.3390/md18050241] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/25/2020] [Accepted: 04/27/2020] [Indexed: 01/17/2023] Open
Abstract
Bioactivity-guided isolation supported by LC-HRESIMS metabolic profiling led to the isolation of two new compounds, a ceramide, stylissamide A (1), and a cerebroside, stylissoside A (2), from the methanol extract of the Red Sea sponge Stylissa carteri. Structure elucidation was achieved using spectroscopic techniques, including 1D and 2D NMR and HRMS. The bioactive extract’s metabolomic profiling showed the existence of various secondary metabolites, mainly oleanane-type saponins, phenolic diterpenes, and lupane triterpenes. The in vitro cytotoxic activity of the isolated compounds was tested against two human cancer cell lines, MCF-7 and HepG2. Both compounds, 1 and 2, displayed strong cytotoxicity against the MCF-7 cell line, with IC50 values at 21.1 ± 0.17 µM and 27.5 ± 0.18 µM, respectively. They likewise showed a promising activity against HepG2 with IC50 at 36.8 ± 0.16 µM for 1 and IC50 30.5 ± 0.23 µM for 2 compared to the standard drug cisplatin. Molecular docking experiments showed that 1 and 2 displayed high affinity to the SET protein and to inhibitor 2 of protein phosphatase 2A (I2PP2A), which could be a possible mechanism for their cytotoxic activity. This paper spreads light on the role of these metabolites in holding fouling organisms away from the outer surface of the sponge, and the potential use of these defensive molecules in the production of novel anticancer agents.
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Affiliation(s)
- Reda F. A. Abdelhameed
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
| | - Eman S. Habib
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
| | - Nermeen A. Eltahawy
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
| | - Hashim A. Hassanean
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
| | - Amany K. Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
| | - Anber F. Mohammed
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt; (A.F.M.); (A.M.H.)
| | - Shaimaa Fayez
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany; (S.F.); (G.B.)
- Department of Pharmacognosy, Faculty of Pharmacy, Ain-Shams University, Cairo 11566, Egypt
| | - Alaa M. Hayallah
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt; (A.F.M.); (A.M.H.)
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New Minia 61111, Egypt
| | - Koji Yamada
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan;
| | - Fathy A. Behery
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
- Department of Pharmaceutical Sciences, College of Pharmacy, Riyadh Elm University, Riyadh 11681, Saudi Arabia
| | - Mohammad M. Al-Sanea
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Aljouf 72341, Saudi Arabia;
| | - Sami I. Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Aljouf 72341, Saudi Arabia;
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany; (S.F.); (G.B.)
| | - Safwat A. Ahmed
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (R.F.A.A.); (E.S.H.); (N.A.E.); (H.A.H.); (A.K.I.)
- Correspondence: (S.A.A.); (U.R.A.)
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia 61111, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Correspondence: (S.A.A.); (U.R.A.)
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Chen DL, Zheng W, Feng J, Ma GX, Liu YY, Xu XD. A new bis-γ-pyrone polypropionate from a marine pulmonate mollusc Onchidium struma. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2019; 21:384-390. [PMID: 29357705 DOI: 10.1080/10286020.2018.1427076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/09/2018] [Indexed: 06/07/2023]
Abstract
A new bis-γ-pyrone polypropionate compound onchidione II (1), together with three known compounds, was isolated from a marine pulmonate mollusc Onchidium struma, collected at Hainan Island of China. The structure of new compound was determined by extensive spectroscopic analyses including IR, 1D and 2D NMR techniques, and chemical methods. Compounds 1-4 were evaluated for their cytotoxicity against human tumor cell lines HepG-2, A549, and MCF-2. The results showed that compounds 1 and 2 were moderate cytotoxic against HepG-2, A549, and MCF-2 cell lines, with IC50 values from 13.2 to 22.4 μM.
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Affiliation(s)
- De-Li Chen
- a Hainan Branch Institute of Medicinal Plant Development (Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) , Chinese Academy of Medical Sciences & Peking Union Medical College , Haikou 570311 , China
| | - Wei Zheng
- a Hainan Branch Institute of Medicinal Plant Development (Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) , Chinese Academy of Medical Sciences & Peking Union Medical College , Haikou 570311 , China
| | - Jian Feng
- a Hainan Branch Institute of Medicinal Plant Development (Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) , Chinese Academy of Medical Sciences & Peking Union Medical College , Haikou 570311 , China
| | - Guo-Xu Ma
- a Hainan Branch Institute of Medicinal Plant Development (Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) , Chinese Academy of Medical Sciences & Peking Union Medical College , Haikou 570311 , China
- b Institute of Medicinal Plant Development (Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education) , Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100193 , China
| | - Yang-Yang Liu
- a Hainan Branch Institute of Medicinal Plant Development (Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine) , Chinese Academy of Medical Sciences & Peking Union Medical College , Haikou 570311 , China
| | - Xu-Dong Xu
- b Institute of Medicinal Plant Development (Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education) , Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100193 , China
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11
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Fisch KM, Hertzer C, Böhringer N, Wuisan ZG, Schillo D, Bara R, Kaligis F, Wägele H, König GM, Schäberle TF. The Potential of Indonesian Heterobranchs Found around Bunaken Island for the Production of Bioactive Compounds. Mar Drugs 2017; 15:E384. [PMID: 29215579 PMCID: PMC5742844 DOI: 10.3390/md15120384] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 01/09/2023] Open
Abstract
The species diversity of marine heterobranch sea slugs found on field trips around Bunaken Island (North Sulawesi, Indonesia) and adjacent islands of the Bunaken National Marine Park forms the basis of this review. In a survey performed in 2015, 80 species from 23 families were collected, including 17 new species. Only three of these have been investigated previously in studies from Indonesia. Combining species diversity with a former study from 2003 reveals in total 140 species from this locality. The diversity of bioactive compounds known and yet to be discovered from these organisms is summarized and related to the producer if known or suspected (might it be down the food chain, de novo synthesised from the slug or an associated bacterium). Additionally, the collection of microorganisms for the discovery of natural products of pharmacological interest from this hotspot of biodiversity that is presented here contains more than 50 species that have never been investigated before in regard to bioactive secondary metabolites. This highlights the great potential of the sea slugs and the associated microorganisms for the discovery of natural products of pharmacological interest from this hotspot of biodiversity.
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Affiliation(s)
- Katja M Fisch
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, 35392 Giessen, Germany.
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
| | - Cora Hertzer
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
| | - Nils Böhringer
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, 35392 Giessen, Germany.
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
| | - Zerlina G Wuisan
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, 35392 Giessen, Germany.
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
| | - Dorothee Schillo
- Centre of Molecular Biodiversity, Zoological Research Museum Alexander Koenig, 53113 Bonn, Germany.
| | - Robert Bara
- Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado 95115, Indonesia.
| | - Fontje Kaligis
- Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado 95115, Indonesia.
| | - Heike Wägele
- Centre of Molecular Biodiversity, Zoological Research Museum Alexander Koenig, 53113 Bonn, Germany.
| | - Gabriele M König
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
- German Center for Infection Research, Partner Site Bonn-Cologne, 53115 Bonn, Germany.
| | - Till F Schäberle
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, 35392 Giessen, Germany.
- Institute for Pharmaceutical Biology, Rheinische Friedrich-Wilhelms-University Bonn, 53115 Bonn, Germany.
- German Center for Infection Research, Partner Site Bonn-Cologne, 53115 Bonn, Germany.
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12
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Bornancin L, Bonnard I, Mills SC, Banaigs B. Chemical mediation as a structuring element in marine gastropod predator-prey interactions. Nat Prod Rep 2017; 34:644-676. [DOI: 10.1039/c6np00097e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Some diterpenoid compounds protect the sacoglossansElysiasp. andCyerce nigricansfrom their carnivorous predator the dorid nudibranch,Gymnodorissp., unlike chemically unprotected gastropods that are consumed by this voracious nudibranch (photo Philippe Bourseiller).
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Affiliation(s)
- L. Bornancin
- CRIOBE
- USR CNRS-EPHE-UPVD 3278
- Université de Perpignan
- 66860 Perpignan
- France
| | - I. Bonnard
- CRIOBE
- USR CNRS-EPHE-UPVD 3278
- Université de Perpignan
- 66860 Perpignan
- France
| | - S. C. Mills
- PSL Research University
- CRIOBE
- USR EPHE-UPVD-CNRS 3278
- 98729 Moorea
- French Polynesia
| | - B. Banaigs
- CRIOBE
- USR CNRS-EPHE-UPVD 3278
- Université de Perpignan
- 66860 Perpignan
- France
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13
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Merad J, Maier T, Rodrigues CAB, Maulide N. Synthesis of γ-pyrones via decarboxylative condensation of β-ketoacids. MONATSHEFTE FUR CHEMIE 2016; 148:57-62. [PMID: 28127091 PMCID: PMC5225206 DOI: 10.1007/s00706-016-1851-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 09/25/2016] [Indexed: 11/28/2022]
Abstract
Abstract This manuscript describes the convergent synthesis of aryl- and alkyl-disubstituted γ-pyrones from β-ketoacids. The reaction proceeds in the presence of trifluoromethanesulfonic anhydride via an unprecedented decarboxylative auto-condensation of the starting material. Herein, the scope and limitations of this transformation are reported. Graphical abstract ![]()
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Affiliation(s)
- Jérémy Merad
- Fakultät für Chemie, Institut für Organische Chemie, Universität Wien, Währinger Strasse 38, 1090 Vienna, Austria
| | - Thomas Maier
- Fakultät für Chemie, Institut für Organische Chemie, Universität Wien, Währinger Strasse 38, 1090 Vienna, Austria
| | - Catarina A. B. Rodrigues
- Fakultät für Chemie, Institut für Organische Chemie, Universität Wien, Währinger Strasse 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Fakultät für Chemie, Institut für Organische Chemie, Universität Wien, Währinger Strasse 38, 1090 Vienna, Austria
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14
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Lah HU, Rasool F, Yousuf SK. Palladium catalyzed C(sp2)–C(sp2) bond formation. A highly regio- and chemoselective oxidative Heck C-3 alkenylation of pyrones and pyridones. RSC Adv 2015. [DOI: 10.1039/c5ra12631b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Palladium catalysed ligand free highly regio- and chemoselective dehydrogenative C-3 alkenylation of pyrones and unprotected pyridones from unactivated alkenes is reported. Simple reaction conditions and broad substrate scope make the process useful.
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Affiliation(s)
- Hafiz Ul Lah
- Medicinal Chemistry Division
- Indian Institute of Integrative Medicine (CSIR-India)
- Srinagar-190005
- India
| | - Faheem Rasool
- Medicinal Chemistry Division
- Indian Institute of Integrative Medicine (CSIR-India)
- Srinagar-190005
- India
| | - Syed Khalid Yousuf
- Medicinal Chemistry Division
- Indian Institute of Integrative Medicine (CSIR-India)
- Srinagar-190005
- India
- AcSIR-India
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15
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Cutignano A, Villani G, Fontana A. One metabolite, two pathways: convergence of polypropionate biosynthesis in fungi and marine molluscs. Org Lett 2012; 14:992-5. [PMID: 22316000 DOI: 10.1021/ol2032653] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structural similarity or even the identity of polyketide compounds does not necessarily imply unique biosynthesis. Feeding experiments with a (13)C labeled precursor establish that the C(3) units in 7-methyl-cyercene-1 (1) are derived from intact propionate in the marine mollusc Ercolania funerea. The same compound in the terrestrial fungus Leptosphaeria maculans/Phoma lingam is synthesized by an acetate/SAM pathway thus proving for the first time metabolic convergence of polyketide biosynthesis in eukaryotes. Traditional (1)H-(13)C NMR correlation spectroscopy has been successfully applied to estimate (13)C incorporation in biosynthetic experiments.
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Affiliation(s)
- Adele Cutignano
- CNR-Istituto di Chimica Biomolecolare, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy.
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16
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17
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Busch B, Hertweck C. Evolution of metabolic diversity in polyketide-derived pyrones: using the non-colinear aureothin assembly line as a model system. PHYTOCHEMISTRY 2009; 70:1833-1840. [PMID: 19651421 DOI: 10.1016/j.phytochem.2009.05.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 05/26/2009] [Accepted: 05/27/2009] [Indexed: 05/28/2023]
Abstract
Polyketide-derived pyrones are structurally diverse secondary metabolites that are represented in all three kingdoms of life and are endowed with various biological functions. The aureothin family of Streptomyces metabolites was chosen as a model to study the factors governing structural diversity and the evolutionary processes involved. This review highlights recent insights into the non-colinear aureothin and neoaureothin modular type I polyketide synthase (PKS), aromatic starter unit biosynthesis, polyketide tailoring reactions, and a non-enzymatic polyene splicing cascade. Pyrone biosynthesis in bacteria, fungi, and plants is compared. Finally, various strategies to increase metabolic diversity of aureothin derivatives through mutasynthesis, pathway engineering, and biotransformation are presented. The unusual aureothin and neoaureothin assembly lines thus not only represent a model for PKS evolution, but provided important insights into non-canonical enzymatic processes that could be employed for the production of antitumor and antifungal agents.
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Affiliation(s)
- Benjamin Busch
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Department of Biomolecular Chemistry, Jena, Germany
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18
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Cutignano A, Cimino G, Villani G, Fontana A. Shaping the polypropionate biosynthesis in the solar-powered mollusc Elysia viridis. Chembiochem 2009; 10:315-22. [PMID: 19115330 DOI: 10.1002/cbic.200800531] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Polypropionates that incorporate pyrones are a family of polyketides featuring the chemistry of a few marine molluscs capable of phototrophic CO(2) fixation as a result of storing viable symbiotic chloroplasts in their bodies. The role and origin of these molecules is poorly investigated, although the unusual biological activities and chemistry of these natural products have recently received renewed interest. Here, we report the results of in vivo studies on production of gamma-pyrone-containing polypropionates in the Mediterranean mollusc Elysia viridis. Biosynthesis of the metabolites in the sacoglossan is shown to proceed through condensation of eight intact C(3) units by polyketide synthase assembly. LC-MS and NMR spectroscopic studies demonstrate that the process involves a pyrone tetraene (10) as key intermediate, whereas the levels of the final polypropionates (6, 7 and 9) are related to each other and show a significant dependence upon light conditions.
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Affiliation(s)
- Adele Cutignano
- CNR-Istituto di Chimica Biomolecolare via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy
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19
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Ciavatta ML, Manzo E, Nuzzo G, Villani G, Cimino G, Cervera JL, Malaquias MAE, Gavagnin M. Aplysiopsenes: an additional example of marine polyketides with a mixed acetate/propionate pathway. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.11.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Eade SJ, Walter MW, Byrne C, Odell B, Rodriguez R, Baldwin JE, Adlington RM, Moses JE. Biomimetic synthesis of pyrone-derived natural products: exploring chemical pathways from a unique polyketide precursor. J Org Chem 2008; 73:4830-9. [PMID: 18517253 DOI: 10.1021/jo800220w] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Our biomimetic hypothesis proposes that families of diverse natural products with complex core structures such as 9,10-deoxytridachione, photodeoxytridachione and ocellapyrone A are derived in nature from a linear and conformationally strained all-( E) tetraene-pyrone precursor. We therefore synthesized such a precursor and investigated its biomimetic transformation under a variety of reaction conditions, both to the above natural products as well as to diverse isomers which we propose to be natural products "yet to be discovered". We also report herein the first synthesis of the natural product iso-9,10-deoxytridachione.
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Affiliation(s)
- Serena J Eade
- The Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
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21
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Total synthesis of cyercene A and the biomimetic synthesis of (±)-9,10-deoxytridachione and (±)-ocellapyrone A. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.03.057] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Zuidema DR, Jones PB. Triplet photosensitization in cyercene A and related pyrones. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2006; 83:137-45. [PMID: 16481191 DOI: 10.1016/j.jphotobiol.2005.12.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 12/11/2005] [Accepted: 12/13/2005] [Indexed: 11/21/2022]
Abstract
Mollusks of the Sacoglossa order contain a variety of polypropionate metabolites that are characterized by a pyrone chromophore, such as cyercene A and 9,10-deoxytridachione. Most often the pyrone is a 2-methoxy-gamma-pyrone but occasionally is a 4-methoxy-alpha-pyrone or hydropyrone. Members of this class of metabolites have been shown to undergo photochemical reactions of biosynthetic importance. An example is the photochemical conversion of 9,10-deoxytridachione to photodeoxytridachione, which has been observed in several mollusks. In this report, a series of gamma-pyrones and their alpha-pyrone analogs were synthesized and analyzed for photosensitizing activity. In all cases studied, the gamma-pyrone was a more efficient triplet sensitizer than the corresponding alpha-pyrone. Included in this set of molecules was the Sacoglossan metabolite cyercene A and its alpha-pyrone isomer. When irradiated in the presence of oxygen, cyercene A produced singlet oxygen at significantly higher rate than the corresponding alpha-pyrone isomer. Furthermore, the photoisomerization of cyercene A was quenched by piperylene with con-committant isomerization of the piperylene indicating that the isomerization proceeded through a triplet excited state. In contrast, the isomerization of the alpha-pyrone analog was not quenched. The implications of these photochemical results in terms of the biosynthesis and biological activity of Sacoglossan polypropionate metabolites are discussed.
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Affiliation(s)
- Daniel R Zuidema
- Department of Chemistry, Wake Forest University, 115-A Salem Hall, Winston-Salem, NC 27109, USA
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23
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Abstract
This review covers the literature published in 2004 for marine natural products, with 693 citations (491 for the period January to December 2004) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (716 for 2004), together with their relevant biological activities, source organisms and country of origin. Biosynthetic studies (8), and syntheses (80), including those that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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24
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Fontana A. Biogenetic proposals and biosynthetic studies on secondary metabolites of opisthobranch molluscs. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2006; 43:303-32. [PMID: 17153349 DOI: 10.1007/978-3-540-30880-5_14] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Marine chemical diversity is generated by a large number of transformations often not noted in terrestrial counterparts. Life in the oceans differs in most respects from life on land and our knowledge of the genetics and biochemistry of marine organisms is still very limited to a small number of species. Biosynthetic studies and biogenetic speculations can therefore be crucial in predicting relevant enzymes and their encoding genes, with a view to setting the stage for rational engineering of marine natural products. A further useful outcome to the identification of biosynthetic pathways is the resulting classification of natural products, which can serve to correlate chemical diversity and biodiversity. This review summarizes the present knowledge on secondary metabolites biogenesis in marine opisthobranchs, a class of organisms that has been emerging as a prolific source of structurally diverse metabolites possessing a broad variety of biological activities.
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Affiliation(s)
- A Fontana
- Instituto di Chimica Biomolecolare (ICB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy
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25
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Thoms C, Ebel R, Proksch P. Sequestration and possible role of dietary alkaloids in the sponge-feeding mollusk Tylodina perversa. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2006; 43:261-75. [PMID: 17153347 DOI: 10.1007/978-3-540-30880-5_12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Opisthobranchs of the genus Tylodina are found at exceedingly distant geographical regions in the marine environment but are always associated with sponges of the order Verongida (e.g., Aplysina species) which serve as prey for these gastropods. We investigated the chemical ecology of the Mediterranean species T. perversa that commonly feeds on A. aerophoba. The gastropod sequesters a set of sponge-derived brominated isoxazoline alkaloids which are accumulated in the mantle and egg masses and are furthermore exuded as part of the mucus when the animal is molested. Based on the documented feeding deterrent properties of the sponge alkaloids against fish, it is speculated that the sequestered sponge alkaloids serve also as a defense for T. perversa. Interestingly, specimens of T. perversa that were either collected while feeding on A. aerophoba or had been kept on these sponges under controlled conditions for several weeks almost always contained the brominated alkaloid aerothionin, which is not detected in A. aerophoba but occurs in the sibling species A. cavernicola instead. The latter sponge is also accepted as a food source by the gastropod, at least under experimental conditions. The possible origin of aerothionin in T. perversa is discussed.
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Affiliation(s)
- C Thoms
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität Universitätsstr. 1, 40225 Düsseldorf, Germany
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26
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Cimino G, Sodano G. Biosynthesis of secondary metabolites in marine molluscs. Top Curr Chem (Cham) 2005. [DOI: 10.1007/bfb0034371] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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27
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Zuidema DR, Miller AK, Trauner D, Jones PB. Photosensitized Conversion of 9,10-Deoxytridachione to Photodeoxytridachione. Org Lett 2005; 7:4959-62. [PMID: 16235932 DOI: 10.1021/ol051887c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The photochemical conversion of 9,10-deoxytridachione to photodeoxytridachione has been photosensitized. The conversion was also quenched by piperylene. Photodeoxytridachione was produced in good yields under conditions in which only the cyclohexadiene group is sensitized. The results show that some, and perhaps all, of the photoreactions of 9,10-deoxytridachione occur through a triplet excited state. The mechanistic and biosynthetic implications of these results are discussed.
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Affiliation(s)
- Daniel R Zuidema
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, USA
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28
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Zuidema DR, Jones PB. Photochemical relationships in Sacoglossan polypropionates. JOURNAL OF NATURAL PRODUCTS 2005; 68:481-486. [PMID: 15844933 DOI: 10.1021/np049607+] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cyercene A has been synthesized and converted to placidene A and isoplacidene A through photoisomerization with sunlight. Hydroperoxide, isolated form Placida dendritica, was synthesized both by singlet oxygenation of cyercene A using Rose Bengal and through the irradiation of cyercene A alone in aerobic solution. The observation that hydroperoxide could be made by singlet oxygenation of cyercene A and that this occurs when cyercene A alone is irradiated supported the hypothesis that gamma-pyrones may act as triplet sensitizers. This was confirmed using cyercene A and a model gamma-pyrone to sensitize the photooxidation of n-butyl sulfide. The biosynthetic implications of these observations for Sacoglossan polypropionates are discussed.
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Affiliation(s)
- Daniel R Zuidema
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, USA
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29
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Abstract
Members of a family of alpha-methoxy-gamma-pyrone-containing polypropionate natural products have been stereoselectively synthesized. Two key iodovinyl pyrone building blocks were coupled to appropriately selected vinyl stannanes to assemble the highly substituted polyene side chains of the natural products. [structure: see text]
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Affiliation(s)
- Guangxin Liang
- Center for New Directions in Organic Synthesis, Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720. USA
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30
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Phipps RK, Petersen BO, Christensen KB, Duus JØ, Frisvad JC, Larsen TO. Hesseltin A, a Novel Antiviral Metabolite from Penicillium hesseltinei. Org Lett 2004; 6:3441-3. [PMID: 15387518 DOI: 10.1021/ol048824z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[structure: see text] Hesseltin A 1, a novel compound of mixed polyketide-terpenoid origins was isolated from the filamentous fungus Penicillium hesseltinei. The structure and stereochemistry were determined from extensive one- and two-dimensional NMR and mass spectral data.
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Affiliation(s)
- Richard K Phipps
- Center for Microbial Biotechnology, BioCentrum-DTU, 2800 Kgs. Lyngby, Denmark.
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31
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Fairlamb IJS, Lynam JM, Taylor IE, Whitwood AC. η1-Bound 2-Pyrone Complexes of Molybdenum and Iron: A Synthetic and Structural Study. Organometallics 2004. [DOI: 10.1021/om049523w] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian J. S. Fairlamb
- Department of Chemistry, University of York, Heslington, York, U.K. YO10 5DD
| | - Jason M. Lynam
- Department of Chemistry, University of York, Heslington, York, U.K. YO10 5DD
| | - Ian E. Taylor
- Department of Chemistry, University of York, Heslington, York, U.K. YO10 5DD
| | - Adrian C. Whitwood
- Department of Chemistry, University of York, Heslington, York, U.K. YO10 5DD
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Cutignano A, Fontana A, Renzulli L, Cimino G. Placidenes C-F, novel alpha-pyrone propionates from the Mediterranean sacoglossan Placida dendritica. JOURNAL OF NATURAL PRODUCTS 2003; 66:1399-1401. [PMID: 14575447 DOI: 10.1021/np0300176] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Four new alpha-pyrone-containing propionates (5-8) and an unprecedented hydroperoxide 9 have been isolated from the mantle extract of Placida dendritica, a Mediterranean sacoglossan that lives upon the green alga Bryopsis plumosa. The new metabolites co-occur with the related compounds 1-4, which have been described in previous studies of the mollusc. The presence of 9 opens intriguing perspectives on the ecological role of placidenes. This paper reports the isolation and structural elucidation of the new compounds 5-9.
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Affiliation(s)
- Adele Cutignano
- Istituto di Chimica Biomolecolare del CNR, Via Campi Flegrei 34, 80078, Pozzuoli, Napoli, Italy
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34
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Marrison LR, Dickinson JM, Fairlamb IJS. Bioactive 4-substituted-6-methyl-2-pyrones with promising cytotoxicity against A2780 and K562 cell lines. Bioorg Med Chem Lett 2002; 12:3509-13. [PMID: 12443764 DOI: 10.1016/s0960-894x(02)00824-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bioactive synthetic 4-substituted-6-methyl-2-pyrones are reported. Various 4-substitutents have been incorporated using Pd-catalysed carbon-carbon bond coupling procedures. Preliminary screening of the 2-pyrones against human ovarian carcinoma (A2780) and human chronic myelogenous leukaemia (K562) cell lines show that 4-alkynyl-6-methyl-2-pyrones have excellent potential as anticancer agents. The pyrones demonstrate broad spectrum antimicrobial activities.
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Affiliation(s)
- Lester R Marrison
- Department of Chemistry and Materials, John Dalton Building, The Manchester Metropolitan University, Chester Street, UK
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35
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Mingo P, Zhang S, Liebeskind LS. One-Step Synthesis of Substituted alpha-Pyrones from Cyclobutenediones and Lithiated O-Silyl Cyanohydrins. J Org Chem 1999; 64:2145-2148. [PMID: 11674317 DOI: 10.1021/jo982271m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pamela Mingo
- Sanford S. Atwood Chemistry Center, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322
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36
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37
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Graber MA, Gerwick WH. Kalkipyrone, a toxic gamma-pyrone from an assemblage of the marine cyanobacteria Lyngbya majuscula and Tolypothrix sp. JOURNAL OF NATURAL PRODUCTS 1998; 61:677-680. [PMID: 9599278 DOI: 10.1021/np970539j] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Kalkipyrone, a novel alpha-methoxy-beta,beta'-dimethyl-gamma-pyrone possessing an alkyl side chain, was isolated from an assemblage of the marine cyanobacteria Lyngbyamajuscula and Tolypothrix sp. Its structure, including stereochemistry, was determined by NMR, UV, and IR analysis and by GC-MS of the natural product and key derivatives. Kalkipyrone is toxic to brine shrimp (LD50 1 microg/mL) and gold fish (LD50 2 microg/mL) and is structurally related to the actinopyrones that were previously isolated from Streptomyces spp.
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Affiliation(s)
- M A Graber
- College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, USA
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38
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Yamamura S, Nishiyama S. Synthetic Studies on Polypropionate-Derived 4-Pyrone-Containing Marine Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.2025] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tringali C, Parisi A, Piattelli M, di San Lio GM. Phomenins A and B, Bioactive Polypropionate Pyrones from Culture Fluids ofPhoma tracheiphila. ACTA ACUST UNITED AC 1993. [DOI: 10.1080/10575639308043845] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
41
|
Biotransformation of a dietary sesterterpenoid in the Mediterranean nudibranchHypselodoris orsini. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01955168] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
42
|
A synthesis of substituted 2-pyrones by carbonylative cross-coupling-thermolysis of 4-halocyclobutenones with alkenyl-, aryl-, and heteroarylstannanes. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)87262-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Vardaro RR, Di Marzo V, Cimino G. Placidenes: cyercene-like polypropionate γ-pyrones from the mediterranean ascoglossan mollusc Placida dendritica. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)78884-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
44
|
Vardaro RR, Di Marzo V, Marin A, Cimino G. α-and γ-Pyrone-poly·propionates from the mediterranean ascoglossan mollusc ercolania funerea. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)88324-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
45
|
Di Marzo V, Vardaro RR, De Petrocellis L, Villani G, Minei R, Cimino G. Cyercenes, novel pyrones from the ascoglossan molluscCyerce cristallina. Tissue distribution, biosynthesis and possible involvement in defense and regenerative processes. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01918390] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|