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How do environmentally friendly antifouling alkaloids affect marine fouling microbial communities?
Sci Total Environ
May 2022
University Joint Laboratory of Guangdong Province, Hong Kong and Macao Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China. Electronic address:
Most previous studies on antifouling (AF) agents have focused on the influence of biofilm formation constituted by single or multiple cultured microbial species, and very few studies have analyzed the relationship between environmentally friendly AF compounds and marine fouling microbial communities (MFMCs). This is the first investigation of the impact of three environmentally friendly alkaloids (5-chlorosclerotiamide, circumdatin F and notoamide C) produced by the deep-sea-derived fungus Aspergillus westerdijkiae on MFMCs using high-throughput Illumina sequencing in a field test. The results of this study showed that the three alkaloids could significantly decrease the coverage of marine microflora (p < 0.
View Article and Find Full Text PDFTaxonomy, chemodiversity, and chemoconsistency of Aspergillus, Penicillium, and Talaromyces species.
Front Microbiol
January 2015
Section of Eukaryotic Biotechnology, Department of Systems Biology, Technical University of Denmark Kongens Lyngby, Denmark.
Aspergillus, Penicillium, and Talaromyces are among the most chemically inventive of all fungi, producing a wide array of secondary metabolites (exometabolites). The three genera are holophyletic in a cladistic sense and polythetic classes in an anagenetic or functional sense, and contain 344, 354, and 88 species, respectively. New developments in classification, cladification, and nomenclature have meant that the species, series, and sections suggested are natural groups that share many extrolites, including exometabolites, exoproteins, exocarbohydrates, and exolipids in addition to morphological features.
View Article and Find Full Text PDFAntifouling potentials of eight deep-sea-derived fungi from the South China Sea.
J Ind Microbiol Biotechnol
April 2014
Key Laboratory of Tropical Marine Bio-resources and Ecology, RNAM Center for Marine Microbiology, Guangdong Key Laboratory of Marine Material Medical, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China.
Marine-derived microbial secondary metabolites are promising potential sources of nontoxic antifouling agents. The search for environmentally friendly and low-toxic antifouling components guided us to investigate the antifouling potentials of eight novel fungal isolates from deep-sea sediments of the South China Sea. Sixteen crude ethyl acetate extracts of the eight fungal isolates showed distinct antibacterial activity against three marine bacteria (Loktanella hongkongensis UST950701-009, Micrococcus luteus UST950701-006 and Pseudoalteromonas piscida UST010620-005), or significant antilarval activity against larval settlement of bryozoan Bugula neritina.
View Article and Find Full Text PDFCircumdatin I, a new ultraviolet-A protecting benzodiazepine alkaloid from a marine isolate of the fungus Exophiala.
J Antibiot (Tokyo)
January 2008
Department of Chemistry, Pukyong National University, Busan, Korea.
A new ultraviolet-A (UV-A) protecting benzodiazepine alkaloid, circumdatin I (1), along with the previously described circumdatin C (2) and circumdatin G (3), have been isolated from the mycelium of a marine-derived fungus of the genus Exophiala. The structures of the three circumdatins were assigned on the basis of physicochemical evidence. The absolute stereochemistry of 1 was determined by comparison of optical rotation and CD experiments with those of 2 and 3.
View Article and Find Full Text PDFMicrowave-assisted concise total syntheses of quinazolinobenzodiazepine alkaloids.
J Org Chem
December 2005
ArQule, Inc., Division of Chemical Technologies, 19 Presidential Way, Woburn, Massachusetts 01801, USA.
[reactions: see text] One-pot total syntheses of the quinazolinobenzodiazepine alkaloids sclerotigenin (1), (+/-)-circumdatin F (2), and (+/-)-asperlicin C (3) via novel microwave-assisted domino reactions were achieved in 55%, 32%, and 20% yields, respectively, from commercially available starting materials. A two-step total synthesis of (+/-)-benzomalvin A (4) was accomplished with an overall yield of 16%. Additionally, analogues of circumdatin E were synthesized via the three-component one-pot sequential reactions promoted by microwave irradiation.
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