Table 1. Representative carboxydotrophic microbial species and their physiological features.
| CO-utilizing species | Optimal
temperature, °C |
CO as energy
source |
CO as carbon
source |
Reference | CO pathways |
|---|---|---|---|---|---|
| Rubrivivax gelatinosus | 34 | + | − | 12 | Ech |
| Rhodospirillum rubrum | 30 | + | − | 28 | Ech |
| Citrobacter sp Y19 | 35 | + | + | 13 | Ech |
|
Carboxydothermus hydrogenoformans
Z2901 |
72 | + | + | 10 | Ech, WL, R |
| Thermosinus carboxydivorans | 60 | + | + | 17 | Ech, WL |
| Carboxydocella thermautotrophica | 58 | + | + | 16 | Ech, WL |
|
Caldanaerobacter subterraneus subsp.
pacificus |
70 | + | ? | 15 | Ech, WL |
| Thermococcus AM4 | 82 | + | − | 18 | Ech |
| Thermococcus onnurineus NA1 | 85 | + | − | 19 | Ech |
|
Methanobacterium
thermoautotrophicum |
55 | + | + | 19 | WL a |
| Oligotropha carboxidovorans OM5 | 30 | + | − | 29 | Ox |
|
Thermogemmatispora carboxidivorans
PM5 |
55 | + | − | 21 | Ox |
| Thermomicrobium roseum | 55 | + | − | 22 | Ox |
CO, carbon monoxide; Ech, energy-conserving hydrogenase; Ox, oxygen as electron acceptor; R, redox reactive; WL, Wood–Ljungdahl. aThis methanogen strain can grow on CO, producing methane.