Table 4.
Selenoproteins in sequenced symbiotic/host-associated bacteria
| Phylum | Organism | Total number of proteins | Number of selenoproteins | Habitat | Oxygen requirement |
|---|---|---|---|---|---|
| Actinobacteria | Collinsella aerofaciens | 2367 | 2 | Human gut | Anaerobic |
| Mycobacterium smegmatis | 6716 | 1 | Human smegma | Aerobic | |
| Mycobacterium avium | 5120 | 1 | Lung | Aerobic | |
| Betaproteobacteria/ Burkholderiaceae | Burkholderia mallei | 5025 | 1 | Mammals | Aerobic |
| Burkholderia multivorans | 6604 | 1 | Human lung | Aerobic | |
| Burkholderia phymatum | 7845 | 1 | Root nodules of tropical legumes | Aerobic | |
| Deltaproteobacteriadelta | Lawsonia intracellularis | 1185 | 1 | Mucosa of the lower intestinal tract in animals | Facultative |
| δ1 symbiont | 12084 | 57 | Below the worm cuticle of Olavius algarvensis | Anaerobic | |
| δ4 symbiont | 3012 | 23 | Below the worm cuticle of Olavius algarvensis | Anaerobic | |
| Epsilonproteobacteria | Campylobacter concisus | 2039 | 6 | Human oral cavity and gastrointestinal tract | Microaerophilic |
| Campylobacter curvus | 1921 | 4 | Human oral cavity and gastrointestinal tract | Microaerophilic | |
| Campylobacter fetus | 1719 | 4 | Human blood | Microaerophilic | |
| Helicobacter hepaticus | 1875 | 1 | Mucosal layer of the gastrointestinal tract | Microaerophilic | |
| Wolinella succinogenes | 2043 | 1 | Gastrointestinal tract | Microaerophilic | |
| Gammaproteobacteria/ Enterobacteriales | Escherichia coli | 4243 | 3 | Lower intestine | Facultative |
| Photorhabdus luminescens | 4683 | 1 | The gut of an entomopathogenic nematode | Facultative | |
| Salmonella enterica | 4427 | 3 | Gastrointestinal tract in animals | Facultative | |
| Salmonella typhimurium | 4425 | 3 | Gastrointestinal tract in animals | Facultative | |
| Shigella boydii | 4136 | 3 | Gastrointestinal tract in animals | Facultative | |
| Shigella dysenteriae | 4274 | 2 | Gastrointestinal tract in animals | Facultative | |
| Shigella flexneri 2a | 4182 | 3 | Gastrointestinal tract in animals | Facultative | |
| Shigella sonnei | 4223 | 3 | Gastrointestinal tract in animals | Facultative | |
| Gammaproteobacteria/ Pasteurellaceae | Actinobacillus pleuropneumoniae | 2012 | 2 | Lower respiratory tract of pigs | Facultative |
| Actinobacillus succinogenes | 1883 | 2 | Bovine rumen | Anaerobic | |
| Haemophilus ducreyi | 1717 | 1 | Animal mucous membranes | Anaerobic | |
| Haemophilus influenzae | 1791 | 2 | Animal mucous membranes | Facultative | |
| Mannheimia succiniciproducens | 2380 | 2 | Bovine rumen | Anaerobic | |
| Pasteurella multocida | 2015 | 1 | Mucous membranes of the intestinal, genital and respiratory tissues | Facultative | |
| Spirochaetales | Treponema denticola | 2767 | 6 | Oral cavity | Anaerobic |