• Source: Ruegeria

In taxonomy, Ruegeria is a genus of the Rhodobacteraceae. This genus was formerly known as the marine Agrobacterium before they were reclassified in 1998. It bears in fact the name of Hans-Jürgen Rüger, a German microbiologist, for his contribution to the taxonomy of marine species of Agrobacterium.




Characteristics


The genus is characterised by members who are:

Gram-negative (like all Proteobacteria)
ovoid to rod-shaped cells 0.6–1.6 × 1.0–4.0 μm
motile by polar flagella, or nonmotile
non-sporeformers
aerobic
oxidase and catalase positive
are incapable of photosynthetic growth
bacteriochlorophyll a is absent
major quinone is ubiquinone 10
mol% G+C of the DNA is 55–59
member of the family Rhodobacteraceae, which is phenotypically, metabolically, ecologically diverse and defined based on 16S sequences data
Phylogenetically it is very close to the genus Silicibacter, but the two remain separate species due to phenotypic differences — two species for which this is problematic are Ruegeria lacuscaerulensis and Ruegeria pomeroyi.
Two species that have been removed from the genus are Marinovum algicola (Ruegeria algicola) and Thalassobius gelatinovorus (Ruegeria gelatinovora).[and refs therein]




Small non-coding RNAs


Highly abundant bacterial small RNAs have been shown to be present in the bacteria subjected to chronic nutrient limitation. In Ruegeria pomeroyi RNAseq analysis identified 99 putative sRNAs. The bacterial sRNAs regulatory mechanisms are typically based on direct RNA-RNA interaction with a target mRNA. The target gene groups identified by Rivers et al. were genes involved in transport, genes mediating cell-cell interactions, signal transduction and transcriptional regulation.




References






Further reading






= Scientific journals

=
Martens T, Heidorn T, Pukall R, Simon M, Tindall BJ, Brinkhoff T (2006). "Reclassification of Roseobacter gallaeciensis Ruiz-Ponte et al. 1998 as Phaeobacter gallaeciensis gen. nov., comb. nov., description of Phaeobacter inhibens sp. nov., antibiotic-producing members of the Roseobacter clade, reclassification of Ruegeria algicola (Lafay et al. 1995) Uchino et al. 1998 as Marinovum algicola gen. nov., comb. nov., and emended descriptions of the genera Roseobacter, Ruegeria and Leisingera". Int. J. Syst. Evol. Microbiol. 56 (Pt 6): 1293–1304. doi:10.1099/ijs.0.63724-0. PMID 16738106.




= Scientific books

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Garrity GM, Holt JG (2001). "Taxonomic Outline of the Archaea and Bacteria". In DR Boone, RW Castenholz (eds.). Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria (2nd ed.). New York: Springer Verlag. pp. 155–166. ISBN 978-0-387-98771-2.

Kata Kunci Pencarian:

• Agrobacterium
• Ruegeria
• Ruegeria pomeroyi
• Epibacterium mobile
• Agrobacterium
• Antarcticimicrobium luteum
• Epibacterium scottomollicae
• Albibacillus
• Ahrensia
• Marinovum
• Rhodobacteraceae