| Acidianus |
| Morphology | Acidianus |
| CELLULAR |
| Staining | |
| Morphology | Cells coccoid, highly irregular, about 0.5-2 um in diameter, occurring almost exclusively singly |
| Motility | nonmotile. |
| Specialized structures | Cell envelope composed of protein subunits in hexagonal array (U. Sleytr, personal communication |
| Division |
| COLONIAL |
| Solid surface |
| Liquid |
| Growth Parameters | Acidianus |
| PHYSIOLOGICAL |
| Tropism | Lithotrophic |
| Oxygen | Facultatively anaerobic growth aerobically via S` oxidation or anaerobically via S` reduction with H2. |
| pH | Thermoacidophilic, grows at pH 1-6. |
| Temperature | Thermoacidophilic, grows above 45`C |
| Requirements | Optimum concentration for growth: around 0.2% NaCl; maximum: 4% NaCl. |
| Products | |
| Enzymes | |
| Unique features | Isopranyl ether lipids, calditol and caldariella quinone present (Langworthy 1985; T. Langworthy and M. Collins,). Elongation factor 2 is ADP-ribosylated by diphtheria toxin (F. Klink, ).. |
| ENVIRONMENTAL |
| Habitat | |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Acidianus |
| G+C Mol % | 31 |
| Reference | Acidianus |
| First citation | Segerer, A., A. Neuner, J.K. Kristjansson and K. O. Stetter. 1986. Acidianus infernus gen. nov. sp. nov., and Acidianus brierleyi comb. nov: facultatively aerobic, extremely acidiphilic, thermophilic sulfur metabolizing archaebacteria. IJSB 36: 559-564 |
| The Prokaryotes | |
| Bergey's Systematatic | p 2251 A. Segerer and K. O. Stetter |
| Bergey's Determinative | p 749 |
| References |