Following the exposure of a biofilm sample from a hydrothermal spring cave (Gellért Hill, Budapest, Hungary) to gamma radiation, a strain designated FeSTC15-38T was isolated and studied by polyphasic taxonomic methods. The spherical-shaped cells stained Gram-negative, and were aerobic and non-motile. The pH range for growth was pH 6.0–9.0, with an optimum at pH 7.0. The temperature range for growth was 20–37 °C, with an optimum at 28 °C. Phylogenetic analysis based on the 16S rRNA gene sequence of the isolate indicated that the organism belongs to the genus Deinococcus. The highest sequence similarities appeared with Deinococcus hopiensis KR-140T (94.1%), Deinococcus aquaticus PB314T (93.3%) and Deinococcus aerophilus 5516T-11T (92.7%). The DNA G+C content of the novel strain was 68.2 mol%. The predominant fatty acids (>10%) were iso-C16: 0 and C16: 1ω7c, and the cell-wall peptidoglycan type was A3β L-Orn–Gly2-3, corroborating the assignment of the strain to the genus Deinococcus. Strain FeSTC15-38T contained MK-8 as the major menaquinone and several unidentified phospholipids, glycolipids and phosphoglycolipids. Resistance to gamma radiation (D10) of strain FeSTC15-38T was <3.0 kGy. According to phenotypic and genotypic data, strain FeSTC15-38T represents a novel species for which the name Deinococcus budaensis sp. nov. is proposed. The type strain is FeSTC15-38T (=NCAIM B.02630T=DSM 101791T).
|Number of pages||7|
|Journal||International Journal of Systematic and Evolutionary Microbiology|
|Publication status||Published - Dec 1 2016|
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics