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Chemical studies on the non polar fraction of the methanolic extract of Pseudopterogorgia elisabethae Bayer collected from the Florida Keys has yielded 12-acetoxypseudopterolide (1), a new diterpene of the pseudopterane series. The structure was established through spectroscopic analysis. Compound (...
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Marine invertebrates, including octocorals, are a prolific source of marine natural products (MNPs) and are also known to host diverse microbial communities. It is well-established that marine microbes are producers of bioactive secondary metabolites. Accordingly, it is hypothesized that bioactive m...
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We recently reported that the biosynthesis of fuscol, a diterpene from the octocoral Eunicea fusca, is inducible by the application of plant signaling factors such as salicylic acid to the coral's algal symbiont. In this study, an mRNA differential display approach has been employed with the di...
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A novel degradative route to pregnanes has been elucidated in the marine sponge Araphimedon compressa. 22-Dehydrosterols, common in the diet of sponges, are the precursors to pregnanes and apparently are degraded by a mechanism analogous to the dealkylation of phytosterols to cholesterol.
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Isochrysis galbana, one of the most widely used marine microalgae in the rearing of finfish and shellfish larvae, is mass cultured frequently in outdoor tanks. Under prolonged and repeated culture, severe contamination occurs. Axenic isolation of I. galbana from such cultures was best achieved by us...
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An enzyme-based assay has been developed and utilized to confirm the production of formaldehyde in the dealkylation of sterol side chains in a marine sponge. The enzyme used in the assay, formaldehyde dehydrogenase, is NAD+ dependent, and the assay measures the production of NADH by determining the ...
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The field of fungal taxonomy has been enduring in recent years due to the progress and application of molecular tools used in concert with morphological analysis. The fungal kingdom is extremely diverse and estimated to include 1.5 million species. Only 11% of these fungi are currently described in ...
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Pseudopterogorgia elisabethae is a common inhabitant of Caribbean reefs and is a well-known source of diterpenes with diverse biological activities. Notably, this octocoral is the sole source of the pseudopterosin family of anti-inflammatory diterpenes and is harvested to supply commercial demand fo...
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Alcyonacean octocorals (Order Alcyonacea, amended from Order, Gorgoniidae) are both dominant on Caribbean reefs and prolific sources of bioactive natural products. Although extensive literature has been published with respect to stony coral-associated bacteria, very little is known regarding bacteri...
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A viable cell-free extract of the marine tunicate Ecteinascidia turbinata has been generated that is capable of transforming amino acids into the ecteinascidin antitumor alkaloids. Tyrosine and cysteine were identified as two building blocks used in ecteinascidin production. The enzyme preparations ...
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A biosynthetic study has been performed to elucidate the precise mechanisms of sterol side chain dealkylation in marine sponges. This process resembles that of insects by involving the oxidation of common dietary sterols with unsaturation at C-24(28) (24-methylenecholesterol (8), fucosterol (3), and...
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