ORCID
- Boden, Rich: 0000-0002-4496-152X
Abstract
The genus Thiomicrorhabdus (Tmr) in the Piskirickettsiaceae in the Thiotrichales of the Gammaproteobacteria contains four species of sulfur-oxidising obligate chemolithoautotroph with validly published names, all previously classified as Thiomicrospira (Tms) species. Here we demonstrate that Thiomicrospira hydrogeniphila , a recently published hydrogen-utilising chemolithoautotroph closely related to Thiomicrorhabdus frisia (type species of Thiomicrorhabdus ) should be classified as a member of the genus Thiomicrorhabdus and not Thiomicrospira , as Thiomicrorhabdus hydrogeniphila comb. nov., on the basis of comparative physiology and morphology as well as 16S rRNA (rrs) gene identity of Tms. hydrogeniphila MAS2T being closer to that of Tmr. frisia JB-A2T (99.1 %) than to Tms. pelophila DSM 1534T (90.5 %) or Hydrogenovibrio marinus MH-110T (94.1 %), and on the basis of the topology of 16S rRNA gene maximum likelihood trees, which clearly place Tms. hydrogeniphila within the genus Thiomicrorhabdus . It was also noted that thiosulfate-grown Thiomicrorhabdus spp. can be distinguished from Thiomicrospira spp. or Hydrogenovibrio spp. on the basis of the 3 dominant fatty acids (C16 : 1, C18 : 1 and C16 : 0), and from other Thiomicrorhabdus spp. on the basis of the fourth dominant fatty acid, which varies between the species of this genus – which could provide a useful diagnostic method. We provide an emended description of Thiomicrorhabdus (Boden R, Scott KM, Williams J, Russel S, Antonen K et al. Int J Syst Evol Microbiol 2017;67:1140–1151) to take into account the properties of Thiomicrorhabdus hydrogeniphila comb. nov.ch
DOI
10.1099/ijsem.0.002279
Publication Date
2017-09-18
Publication Title
International Journal of Systematic and Evolutionary Microbiology
ISSN
1466-5026
Embargo Period
2018-09-18
Organisational Unit
School of Biological and Marine Sciences
Keywords
chemolithoautotroph, thiomicrospira, thiomicrorhabdus, hydrogenovibrio, thioalkalimicrobium, hydrogenase
Recommended Citation
Boden, R., Scott, K., Rae, A., & Hutt, L. (2017) 'Reclassification of Thiomicrospira hydrogeniphila (Watsuji et al. 2016) to Thiomicrorhabdus hydrogenophila comb. nov., with emended description of Thiomicrorhabdus (Boden et al., 2017)', International Journal of Systematic and Evolutionary Microbiology, . Available at: https://doi.org/10.1099/ijsem.0.002279
