Difference between revisions of "Nitrobacter hamburgensis"

From MicrobeWiki, the student-edited microbiology resource
Jump to: navigation, search
Line 7: Line 7:
  
 
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.
 
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.
 +
  
 
Genome structure
 
Genome structure
  
 
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.
 
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
 
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.
 
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.
 +
  
 
Application to Biotechnology
 
Application to Biotechnology
  
 
This organism produces nitrite oxidoreductase used for oxidizing nitrite to nitrate.  From the redox reaction; the organism gains energy.
 
This organism produces nitrite oxidoreductase used for oxidizing nitrite to nitrate.  From the redox reaction; the organism gains energy.
 +
  
 
References
 
References
Line 27: Line 31:
  
 
Franco-Rivera A, Paniaqua-Michel S, Zamora-Castro J. 2007.  “Characterization and performance of constructed nitrifying biofilms during nitrogen bioremediation of a wastewater effluent.” Journal of industrial microbiology and biotechnology, vol. 34, no. 4. (279-287)
 
Franco-Rivera A, Paniaqua-Michel S, Zamora-Castro J. 2007.  “Characterization and performance of constructed nitrifying biofilms during nitrogen bioremediation of a wastewater effluent.” Journal of industrial microbiology and biotechnology, vol. 34, no. 4. (279-287)
 +
  
 
Edited by Rashonda Butler of UC San Diego, student of Rachel Larsen.  
 
Edited by Rashonda Butler of UC San Diego, student of Rachel Larsen.  
  
 
Retrieved from "http://microbewiki.kenyon.edu/index.php
 
Retrieved from "http://microbewiki.kenyon.edu/index.php

Revision as of 20:33, 30 April 2007

Classification

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.


Genome structure

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.


Application to Biotechnology

This organism produces nitrite oxidoreductase used for oxidizing nitrite to nitrate. From the redox reaction; the organism gains energy.


References

Jens Aamand, Thomas Ahl, and Eva Spieck. 1996. "Monoclonal Antibodies Recognizing Nitirite Oxidoreductase fo Nitrobacter hamburgensis, N. winogradskyi, and N. vulgaris." Applied and Environmental Microbiology, vol. 67, no. 7. (2352-5)

E. Bock et al. 1983. “New facultative lithoautotrophic nitrite-oxidizing bacteria.” Archives of Microbiology, vol. 136, no.4. (281-284)

Franco-Rivera A, Paniaqua-Michel S, Zamora-Castro J. 2007. “Characterization and performance of constructed nitrifying biofilms during nitrogen bioremediation of a wastewater effluent.” Journal of industrial microbiology and biotechnology, vol. 34, no. 4. (279-287)


Edited by Rashonda Butler of UC San Diego, student of Rachel Larsen.

Retrieved from "http://microbewiki.kenyon.edu/index.php