Exemplar Abstract for Nitrobacter hamburgensis Bock et al. 2001.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Nitrobacter Hamburgensis

Nitrite oxidoreductase from Nitrobacter hamburgensis: redox centers and their catalytic role

1992 ◽  
Vol 158 (2) ◽  
pp. 127-131 ◽  
Author(s):  
Michael Meincke ◽  
Eberhard Bock ◽  
Dieter Kastrau ◽  
Peter M. H. Kroneck
Keyword(s):  
Catalytic Role ◽  
Nitrite Oxidoreductase ◽  
Nitrobacter Hamburgensis ◽  
Redox Centers

scholarly journals The Aquatic Budding Bacterium Blastobacter denitrificans Is a Nitrogen-Fixing Symbiont of Aeschynomene indica

2002 ◽  
Vol 68 (3) ◽  
pp. 1132-1136 ◽  
Author(s):  
Peter van Berkum ◽  
Bertrand D. Eardly
Keyword(s):  
Rhodopseudomonas Palustris ◽  
Rrna Gene ◽  
Nitrogen Fixing ◽  
Molecular Systematic ◽  
Cellular Attachment ◽  
Freshwater Bacteria ◽  
Degree Of Confidence ◽  
Nitrobacter Hamburgensis ◽  
Internally Transcribed Spacer ◽  
High Degree

ABSTRACT Blastobacter spp. are freshwater bacteria that form rosette structures by cellular attachment to a common base. Comparative analyses of ribosomal 16S rRNA gene and internally transcribed spacer region sequences indicated that B. denitrificans is a member of the α-subdivision of Proteobacteria. Among the α-Proteobacteria, B. denitrificans was related to a cluster of genera, including Rhodopseudomonas palustris, Afipia felis, Nitrobacter hamburgensis, and Bradyrhizobium spp. Although the precise phylogenetic relationships among these genera could not be established with a high degree of confidence, the sequences of B. denitrificans and several bradyrhizobial isolates from nodules of Aeschynomene indica were almost identical. Bradyrhizobia are bacteria that form nitrogen-fixing symbioses with legumes, including soybeans (Glycine max) and members of the genus Aeschynomene. From symbiotic infectiveness tests we demonstrated that the type strain for B. denitrificans, IFAM 1005, was capable of forming an effective nitrogen-fixing symbiosis with A. indica. Not only do these results reveal a previously unknown ecological adaptation of a relatively obscure aquatic bacterium, but they also demonstrate how evidence gathered from molecular systematic analyses can sometimes provide clues for predicting ecological behavior.

scholarly journals Complete Genome Sequence of Nitrobacter hamburgensis X14 and Comparative Genomic Analysis of Species within the Genus Nitrobacter

2008 ◽  
Vol 74 (9) ◽  
pp. 2852-2863 ◽  
Author(s):  
Shawn R. Starkenburg ◽  
Frank W. Larimer ◽  
Lisa Y. Stein ◽  
Martin G. Klotz ◽  
Patrick S. G. Chain ◽  
...  
Keyword(s):  
Rhodopseudomonas Palustris ◽  
Draft Genome ◽  
Genomic Analysis ◽  
Gene Clusters ◽  
Heavy Metal Resistance ◽  
Metal Resistance ◽  
Comparative Genomic ◽  
Nitrobacter Hamburgensis ◽  
Or Gene ◽  
Heme Copper Oxidases

ABSTRACT The alphaproteobacterium Nitrobacter hamburgensis X14 is a gram-negative facultative chemolithoautotroph that conserves energy from the oxidation of nitrite to nitrate. Sequencing and analysis of the Nitrobacter hamburgensis X14 genome revealed four replicons comprised of one chromosome (4.4 Mbp) and three plasmids (294, 188, and 121 kbp). Over 20% of the genome is composed of pseudogenes and paralogs. Whole-genome comparisons were conducted between N. hamburgensis and the finished and draft genome sequences of Nitrobacter winogradskyi and Nitrobacter sp. strain Nb-311A, respectively. Most of the plasmid-borne genes were unique to N. hamburgensis and encode a variety of functions (central metabolism, energy conservation, conjugation, and heavy metal resistance), yet ∼21 kb of a ∼28-kb “autotrophic” island on the largest plasmid was conserved in the chromosomes of Nitrobacter winogradskyi Nb-255 and Nitrobacter sp. strain Nb-311A. The N. hamburgensis chromosome also harbors many unique genes, including those for heme-copper oxidases, cytochrome b 561, and putative pathways for the catabolism of aromatic, organic, and one-carbon compounds, which help verify and extend its mixotrophic potential. A Nitrobacter “subcore” genome was also constructed by removing homologs found in strains of the closest evolutionary relatives, Bradyrhizobium japonicum and Rhodopseudomonas palustris. Among the Nitrobacter subcore inventory (116 genes), copies of genes or gene clusters for nitrite oxidoreductase (NXR), cytochromes associated with a dissimilatory nitrite reductase (NirK), PII-like regulators, and polysaccharide formation were identified. Many of the subcore genes have diverged significantly from, or have origins outside, the alphaproteobacterial lineage and may indicate some of the unique genetic requirements for nitrite oxidation in Nitrobacter.

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