''Alicyclobacillus cycloheptanicus'' is a species of

Gram positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. The Gram stain i ...

, strictly aerobic,

bacterium Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the ...

. The bacteria are acidophilic and produce endospores. It was first isolated from soil. The species was originally classified as ''Bacillus cycloheptanicus'' in 1987, but further

16S rRNA 16S ribosomal RNA (or 16Svedberg, S rRNA) is the RNA component of the 30S subunit of a prokaryotic ribosome (SSU rRNA). It binds to the Shine-Dalgarno sequence and provides most of the SSU structure. The genes coding for it are referred to as ...

studies found that the species belonged in the newly created genus ''Alicyclobacillus''. The species name refers ω-cycloheptane fatty acids in the cell membrane. ''A. cycloheptanicus'' was among the first three species reclassified from the genus ''

Bacillus ''Bacillus'', from Latin "bacillus", meaning "little staff, wand", is a genus of Gram-positive, rod-shaped bacteria, a member of the phylum ''Bacillota'', with 266 named species. The term is also used to describe the shape (rod) of other so-sh ...

'' to the newly created ''Alicyclobacillus'' in 1992, along with '' A. acidocaldarius'' and '' A. acidoterrestris''. The optimum growth temperature for ''A. cycloheptanicus'' is 48 °C, and can grow in the 40-53 °C range. The optimum pH is 3.5-4.5, and can grow in pH 3.0-5.5.

References

Gram-positive bacteria Bacteria described in 1992 Bacillales {{bacilli-stub