| [microbial polysaccharides of marine origin and their potential in human therapeutics]. | bacterial polysaccharides offer fascinating potential applications for the pharmaceutical industry. although many known marine bacteria produce exopolysaccharides (eps), continuation in looking for new polysaccharide-producing micro-organisms is promising. marine bacteria, isolated from deep-sea hydrothermal vents, have demonstrated their ability to produce in aerobic conditions, unusual eps. with the aim of discovering biological activities, eps presenting different structural features were stu ... | 2004 | 15063931 |
| vibrio diabolicus sp. nov., a new polysaccharide-secreting organism isolated from a deep-sea hydrothermal vent polychaete annelid, alvinella pompejana. | a deep-sea, facultatively anaerobic, heterotrophic, mesophilic new organism was isolated from the polychaete annelid alvinella pompejana collected from a deep-sea hydrothermal field in the east pacific rise. on the basis of phenotypic characteristics, phylogenetic analyses, and dna-dna relatedness, this organism was identified as a new species of the genus vibrio, for which the name vibrio diabolicus is proposed. in batch cultures in the presence of glucose, this organism produced an innovative ... | 1997 | 9336897 |
| genome sequence of vibrio diabolicus and identification of the exopolysaccharide he800 biosynthesis locus. | vibrio diabolicus, a marine bacterium originating from deep-sea hydrothermal vents, produces the he800 exopolysaccharide with high value for biotechnological purposes, especially for human health. its genome was sequenced and analyzed; phylogenetic analysis using the core genome revealed v. diabolicus is close to another deep-sea vibrio sp. (ex25) within the harveyi clade and alginolyticus group. a genetic locus homologous to the syp cluster from vibrio fischeri was demonstrated to be involved i ... | 2014 | 25273176 |
| genes similar to the vibrio parahaemolyticus virulence-related genes tdh, tlh, and vscc2 occur in other vibrionaceae species isolated from a pristine estuary. | detection of the human pathogen vibrio parahaemolyticus often relies on molecular biological analysis of species-specific virulence factor genes. these genes have been employed in determinations of v. parahaemolyticus population numbers and the prevalence of pathogenic v. parahaemolyticus strains. strains of the vibrionaceae species photobacterium damselae, vibrio diabolicus, vibrio harveyi, and vibrio natriegens, as well as strains similar to vibrio tubiashii, were isolated from a pristine salt ... | 2014 | 24212573 |
| screening of enzymatic activities for the depolymerisation of the marine bacterial exopolysaccharide he800. | the exopolysaccharide (eps) he800 is a marine-derived polysaccharide (from 8 × 10(5) to 1.5 × 10(6) g mol(-1)) produced by vibrio diabolicus and displaying original structural features close to those of glycosaminoglycans. in order to confer new biological activities to the eps he800 or to improve them, structural modifications need to be performed. in particular, depolymerisation is required to generate low-molecular-weight derivatives. to circumvent the use of chemical methods that lack specif ... | 2012 | 22234531 |
| sterilization of exopolysaccharides produced by deep-sea bacteria: impact on their stability and degradation. | polysaccharides are highly heat-sensitive macromolecules, so high temperature treatments are greatly destructive and cause considerable damage, such as a great decrease in both viscosity and molecular weight of the polymer. the technical feasibility of the production of exopolysaccharides by deep-sea bacteria vibrio diabolicus and alteromonas infernus was previously demonstrated using a bioproduct manufacturing process. the objective of this study was to determine which sterilization method, oth ... | 2011 | 21566796 |
| structure of the exopolysaccharide of vibrio diabolicus isolated from a deep-sea hydrothermal vent. | the structure of the exopolysaccharide produced under laboratory conditions by vibrio diabolicus, a bacterium recovered from a deep-sea hydrothermal vent, has been investigated using sugar and methylation analysis and nmr spectroscopy. the polysaccharide consists of a linear tetrasaccharide repeating unit with the following structure. -->3)-beta-d-glcp nac-(1-->4)-beta-d-glcp a-(1-->4)-beta-d-glcp a-(1-->4)-alpha-d-galp nac-(1--> | 1999 | 10629947 |
| characterization of a halophilic heterotrophic nitrification-aerobic denitrification bacterium and its application on treatment of saline wastewater. | a novel halophilic bacterium capable of heterotrophic nitrification-aerobic denitrification was isolated from marine sediments and identified as vibrio diabolicus sf16. it had ability to remove 91.82% of nh4(+)-n (119.77 mg/l) and 99.71% of no3(-)-n (136.43 mg/l). the nitrogen balance showed that 35.83% of initial nh4(+)-n (119.77 mg/l) was changed to intracellular nitrogen, and 53.98% of the initial nh4(+)-n was converted to gaseous denitrification products. the existence of napa gene further p ... | 2015 | 25557251 |
| vibrio diabolicus challenge in bathymodiolus azoricus populations from menez gwen and lucky strike hydrothermal vent sites. | menez gwen (mg) and lucky strike (ls) deep-sea hydrothermal vents are located at 850 m and 1730 m depths respectively and support chemosynthesis-based ecosystems partially differing in heavy metal concentration, temperature range, and faunistic composition. the successfully adapted deep-sea vent mussel bathymodiolus azoricus is found at both vent locations. in such inhospitable environments survival strategies rely on the establishment of bacteria-vent animal symbiosis in spite of the toxic natu ... | 2015 | 26529571 |