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Genus of bacteria From Wikipedia, the free encyclopedia
Halothiobacillus is a genus in the Gammaproteobacteria. Both species are obligate aerobic bacteria; they require oxygen to grow. They are also halotolerant; they live in environments with high concentrations of salt or other solutes, but don't require them in order to grow.
Halothiobacillus | |
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H. neapolitanus with carboxysomes | |
Scientific classification | |
Domain: | |
Phylum: | |
Class: | |
Order: | Chromatiales |
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Genus: | Halothiobacillus |
Species | |
Halothiobacillus kellyi |
The type species of this genus, Halothiobacillus neapolitanus used to be members of the genus Thiobacillus, before they were reclassified in 2000.[1] A further two former Thiobacillus spp. were also reclassified as Halothiobacillus halophilus and Halothiobacillus hydrothermalis, both of which were obligate halophiles rather than being halotolerant and showed comparatively low 16S rRNA gene identity to Halothiobacillus neapolitanus and so were reclassified to the newly designated genus Guyparkeria in 2017, as Guyparkeria halophila and Guyparkeria hydrothermalis.[2]
Halothiobacillus spp. and other chemolithoautotrophic organisms play an important role in global carbon and sulfur cycles. They are able to depend entirely on inorganic compounds (CO2 and reduced sulfur) for their carbon and energy needs, but can assimilate some Krebs cycle intermediates during autotrophic growth.[2]
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