Query: NC_009930:4909 Acaryochloris marina MBIC11017 plasmid pREB5, complete sequence Lineage: Acaryochloris marina; Acaryochloris; ; Chroococcales; Cyanobacteria; Bacteria General Information: Acaryochloris marina MBIC11017 was isolated from algae from the coast of the Palau Islands in the western Pacific. Marine cyanobacterium. Acaryochloris marina was first isolated as an epiphyte of algae. M. marina been isolated from a variety of habitats and locations, usually associated with algae but also as free-living organisms. This cyanobacterium produces an atypical photosynthetic pigment, chlorophyll d, as the major reactive agent. The oxygenic photosynthesis based on this pigment may have evolved as an acclimatization to far-red light environments, or an as intermediate between the red-absorbing oxygenic and the far-red-absorbing anoxygenic photosynthesis that uses bacteriochlorophylls. Because of the unusual ratio of chlorophyll a to chlorophyll d in this organism, it has been used as a model to study the spectrographic characteristics of the two pigments.
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General Information: Trichodesmium erythraeum strain IMS101 was isolated from the North Carolina coast in 1992 and grows in straight filaments. Filamentous marine cyanobacterium. This filamentous marine cyanobacterium is a nitrogen-fixing organism that contribues a significant amount of the global fixed nitrogen each year. These bacteria are unusual in that nitrogen fixation takes place in a differentiated cell called the diazocyte which is different from the nitrogen-fixing differentiated cell (heterocyst) found in other cyanobacteria. The diazocyte is developed in order to protect the oxygen-sensitive nitrogenases and includes a number of changes including production of more membranes and down-regulation of photosynthetic activity during times of peak nitrogen fixation (noontime). This organism gives the Red Sea its name when large blooms appear and is one of the organisms most often associated with large blooms in marine waters.