A Microbial Biorealm page on the genus Nitrobacter hamburgensis
Bacteria; Proteobacteria; Alphaproteobacteria; Rhizobiales; Bradyrhizobiaceae; Nitrobacter; Nitrobacter hamburgensis
Description and significance
Nitrobacter hamburgensis, gram negative bacteria, was isolated from soil of the Old Botanic Garden in Hamburg and of a corn field in Yucatan. The main types of environments they inhabit are soil, building sandstone, and sewage sludge. Its cells are 0.5-0.8 x 1.2-2.0 m in size. They are pleomorphic; mostly pear-shaped and motile via one subpolar to lateral flagellum. Intracytoplasmic membranes appear as caps of flattened vesicles or membrane vesicles in the central region of the cell. The bacteria have an enzyme capable of oxidizing nitrite. This is why it is important to sequence the genome of N. hamburgensis.
There is one circular DNA chromosome and three circular DNA plasmids. The chromosome has 4,406,967 nucleotides. Plasmid 1 has 294,829 nucleotides, 2 has 188,318 nucleotides, and 3 has 121,408 nucleotides.
Cell structure and metabolism
N. hamburgensis gains energy from oxidation of nitrite to nitrate via the enzyme nitrite oxidoreductase (NOR). It grows best mixotrophically with a doubling time of 10 hours to 18 hours. Its growth rate under heterotrophic conditions is slower than under mixotrophic conditions, but higher than under lithoautotrophic conditions.
Describe any interactions with other organisms (included eukaryotes), contributions to the environment, effect on environment, etc.
How does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
Application to Biotechnology
Does this organism produce any useful compounds or enzymes? What are they and how are they used?
Enter summaries of the most recent research here--at least three required
[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.
Edited by student of Rachel Larsen and Kit Pogliano