Query: NC_009952:592000 Dinoroseobacter shibae DFL 12, complete genome
Lineage: Dinoroseobacter shibae; Dinoroseobacter; Rhodobacteraceae; Rhodobacterales; Proteobacteria; Bacteria
General Information: This aerobic anoxygenic phototroph was isolated from cultivated marine dinoflagellates originally from the Bay of Tokyo, Japan. Liquid cultures grown in the dark are distinctly pink, while colonies on complex agar media are dark red.
Subject: NC_007412:147757 Anabaena variabilis ATCC 29413 plasmid C, complete sequence
Lineage: Anabaena variabilis; Anabaena; Nostocaceae; Nostocales; Cyanobacteria; Bacteria
General Information: These cyanobacteria are bluegreen algae that are capable of fixing carbon and nitrogen. They form long filaments and can be found worldwide in various aquatic environments as well as some terrestrial ones. These bacteria can form a variety of differentiated cell types, including spore-like cells (akinetes), small motile filaments (hormongia) and most importantly, heterocysts that are nitrogen-producing cells. The heterocyst produces multiple layers outside of its cell wall, shuts down photosystem II in order to inhibit oxygenic photosynthesis and ramps up metabolism in order to use up the oxygen present. Heterocysts donate fixed nitrogen compounds as amino acids to neighboring cells and in return receive a photosynthetically produced carbon source such as sucrose. These organisms produce toxic blooms in aquatic environments that are harmful or fatal to animals and humans due to the various cyanotoxins they produce. Anabaena variabilis is a filamentous heterocyst-forming cyanobacterium that fixes nitrogen and CO2 using the energy of sunlight via oxygen-evolving plant-type photosynthesis. In addition, this organism has been studied extensively for the production of hydrogen using solar energy.