Gemmatimonas aurantiaca

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SEM image of Gemmatimonas aurantiaca. Bar = 1 micrometer.


Superregnum: Bacteria
Regnum: Bacteria
Group: FCB group
Phylum: Gemmatimonadetes
Classis: Gemmatimonadetes
Ordo: Gemmatimonadales
Familia: Gemmatimonadaceae
Genus: Gemmatimonas
Species: G. aurantiaca


Gemmatimonas aurantiaca, Zhang et al., 2003


Rod-shaped, gram-negative. Reproduces by budding.


The 16S rRNA sequence places this organism into its own phyla (19% sequence divergence). This new phyla originally contained only clones obtained from environmental sources with no cultured isolates. The original phyla was named candidate division BD or KS-B.


Able to utilize a limited range of carbon sources, such as yeast extract, polypepton, succinate, acetate, gelatin and benzoate. Neisser staining is positive and 4,6-diamidino-2-phenylindole-stained cells displayed a yellow fluorescence, indicative of polyphosphate inclusions. Menaquinone 9 is the major respiratory quinone. The cellular fatty acids of the strain were mainly composed of iso-C15 : 0, C16 : 1 and C14 : 0. The G+C content of the genomic DNA was 66 mol%.


Isolated from wastewater. Growth range is 25 to 35°C with an optimum temperature of 30°C. The pH range for growth was 6.5 to 9.5, with an optimum of pH 7.0.


Zhang, H., Sekiguchi, Y., Hanada, S., Hugenholtz, P., Kim, H., Kamagata, Y. and Nakamura, K.: "Gemmatimonas aurantiaca gen. nov., sp. nov., a Gram-negative, aerobic, polyphosphate-accumulating micro-organism, the first cultured representative of the new bacterial phylum Gemmatimonadetes phyl. nov." Int. J. Syst. Evol. Microbiol. 53 (2003): 1155–1163.