Query: NC_016940:1698000 Saprospira grandis str. Lewin chromosome, complete genome Lineage: Saprospira grandis; Saprospira; Saprospiraceae; Sphingobacteriales; Bacteroidetes; Bacteria General Information: Gliding bacterium. Saprospira grandis is a gram-negative, marine, multicellular, filamentous flexibacterium. They prey on other bacteria by trapping and devouring them. It is significant because it is known for devouring bacteria and also has been shown to digest algae by the same process. This makes this bacterium important because it is useful in preventing harmful algal blooms. They are mesophilic with their optimum temperature being between 25-30 degrees C, and require a neutral pH. This filamentous organism is matile by gliding. This organism is able to lyse bacterial cells on the surfaces it is moving over.
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General Information: Heliobacterium modesticaldum strain Ice1, the type strain of this species, was isolated from Icelandic hot spring volcanic soils. It grows optimally above 50 degrees Celsius, grows best photoheterotrophically, but can grow in the dark chemotrophically on pyruvate. Phototrophic thermophile. This organism is an anoxygenic phototroph isolated from hot spring microbial mats and volcanic soil. Cell wall structure, the ability to form endospores, and 16S ribosomal RNA analysis place Heliobacterium modesticaldum in a family of phototrophic bacteria related to the Clostridia. Heliobacterium modesticaldum is able to fix nitrogen and may contribute significantly to the nitrogen availability in microbial mats.