Table 1. Absence of the SHOCT domain from most model organisms.

Species	SHOCT domain?
Escherichia coli	No
Salmonella typhimurium	No
Haemophilus influenzae	No
Vibrio cholera	No
Pseudomonas aeruginosa	No
Neisseria meningitidis	No
Rickettsia prowazekii	No
Helicobacter pylori	No
Synechocystis spp.	Yes
Deinococcus radiodurans	No
Streptomyces coelicolor	Yes
Mycobacterium tuberculosis	Partial*
Ureaplasma urealyticum	No
Mycoplasma pneumoniae	No
Streptococcus pneumoniae	No
Staphylococcus aureus	Partial*
Bacillus subtilis	Partial*
Thermotoga maritima	Yes
Aquifex aeolicus	No
Chlamydophila pneumoniae	No
Chlamydia trachomatis	No
Treponema pallidum	No
Borrelia burgdorferi	No

^*SHOCT is found in Bacillus subtilis strain BSn5, but not the more commonly studied strain 168, it is found in some strains of Mycobacterium tuberculosis, but not in the commonly studied strain H37Rv, it is found in some strains of Staphylococcus aureus but not the well characterised MRSA252, MSSA476, EMRSA-15, MSHR1132 and LGA251 strains.