Query: NC_017506:2993679 Marinobacter adhaerens HP15 chromosome, complete genome Lineage: Marinobacter adhaerens; Marinobacter; Alteromonadaceae; Alteromonadales; Proteobacteria; Bacteria General Information: Country: Germany; Environment: marine water; Temp: 15C; Habitat: temperate shelf and sea biome; Isolation:German Wadden Sea. The marine bacterium strain HP15 was isolated from the German Wadden Sea. In order to isolate exclusively attached bacteria, aggregates (0.1 to 1 mm in diameter) were collected on a plankton net (0.1 mm pore size) from surface waters of 15 degrees C. Marine aggregates are densely colonized by bacteria from different taxonomic groups. Inter-specific interactions such as inhibition are important for colonization by aggregate-associated bacteria and thus affect the turnover of organic matter in the oceans. Strain HP15 is a colonizing bacterium which belongs to the Alteromonadaceae family within the class Gammaproteobacteria.
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General Information: This strain was isolated from a culture of the dinoflagellate Pfiesteria piscicida CCMP1830 which has been implicated in many large scale algal blooms resulting in increased mortality in fish. The bacteria are attached to the surface of the dinoflagellate and in some ways allow the dinoflagellate to grow as those lacking the bacteria die off. The bacterium also chemotaxes towards the dinoflagellate product DMSP (dimethylsulfoniopropionate) and metabolizes it. DMSP is a major source of sulfur in marine ecosystems and plays a role in the sulfur biogeochemical cycle. The implication is a tight association between these important dinoflagellates and this marine bacterium.