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A new lipopeptide, cystargamide (1) was isolated from the fermentation broth of the actinomycete Kitasatospora cystarginea. The bacterial strain was selected from a set of 12 Kitasatospora spp. using a secondary metabolomics approach combining liquid chromatography/high-resolution mass spectrometry ...
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Due to a rate increase in the resistance of microbial pathogens to currently used antibiotics, there is a need in society for the discovery of novel antimicrobials. Historically, fungi are a proven source for antimicrobial compounds. The main goals of this study were to investigate the fungal divers...
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Gorgonian corals have proven to be a prolific source of a variety of biologically active terpenes. Corals of the genus Plexaurella are known to be the source of a diverse array of sesquiterpenes, and past reports have indicated variability in terpene content. This study involved an examination of th...
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The close association between marine invertebrates, zooxanthellae, and numerous bacteria gives rise to the question of the identity of the actual producer of secondary metabolites. In fall of 2005, a widespread bleaching event occurred throughout the Caribbean Sea in which some colonies of the gorgo...
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The fatty acid synthase from Bugula neritina has been purified 100-fold using ammonium sulfate precipitation, ion-exchange and size exclusion chromatography. The purified enzyme has a molecular weight of approximately 382,000 Da, as judged by gel filtration. Polyacrylamide gel electrophoresis under ...
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Marine invertebrates have proven to be a rich source of secondary metabolites. The growing recognition that marine microorganisms associated with invertebrate hosts are involved in the biosynthesis of secondary metabolites offers new alternatives for the discovery and development of marine natural p...
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The sterols of Bugula neritina have been isolated and characterized spectroscopically. Cholesterol was found to be the predominant sterol with C28, C29, and C30 sterols recovered as minor components. In vivo biosynthetic experiments revealed that cholesterol is the only sterol produced by de novo bi...
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Osteoarthritis is one of the most common disorders presented to the primary care physician in the over 50 years age group in the Kingdom of Saudi Arabia. The diagnosis is made by history, typical x-ray findings and non-contributory laboratory investigations. The understanding of the pathogenesis of ...
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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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The effects of continuous passive motion (CPM) on nerve regeneration following nerve repair were investigated. In 26 rabbits, the medial popliteal nerve was transected and microsurgically repaired. Half of the animals were treated with cast immobilization and the rest with 70 degrees arc CPM. Both t...
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The diketopiperazine of DOPA was synthesized in high yield from the diketopiperazine of tyrosine using PC12 cell lysate, which expresses high levels of tyrosine hydroxylase. This represents the first use of this enzyme to prepare DOPA-containing peptides.
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This study examined the symbiotic microbiota of the hexacoral Cirrhipathes lutkeni using traditional plate culture, fluorescence in situ hybridization ( FISH) and 16S rDNA characterization. FISH counts for the whole coral (holobiont) showed a major presence of gamma-Proteobacteria (22%) and Actinoba...
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[formula: see text] Both in vivo and in vitro techniques have been developed to test putative intermediates in the biosynthetic pathway to the pseudopterosins, antiinflammatory compounds isolated from Pseudopterogorgia elisabethae. Furthermore, specific activity data we have obtained indicate that p...
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A number of biological and physical stimuli have been evaluated as inducers of pseudopterosin biosynthesis in the sea whip Pseudopterogorgia elisabethae. Data indicate that the production of pseudopterosins can be significantly increased in response to high levels of predation by the mollusk Cyphoma...
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This report describes a series of experiments designed to determine if terpene biosynthesis is inducible in two families of marine terpenes, pseudopterosins from the gorgonian coral Pseudopterogorgia elisabethae and fuscol from Eunicea fusca. Since we have recently shown that terpene biosynthesis is...
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Amphilectosins A and B have been identified from the organic extract of Pseudopterogorgia elisabethae collected in the Florida Keys, along with seco-pseudopterosins and pseudopterosins. The structures of the amphilectosins, "C-12-C-13 dehydro seco-pseudopterosins", suggested that these metabolites p...
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