The Genus Thermomicrobium
Thermomicrobium roseum (ATCC 27502), the sole representative of a phylogenetically distinct branch of the eubacteria, is an obligate thermophile originally isolated from the effluent of a hot spring in Yellowstone National Park, WY (Jackson et al., 1973). The grouping of T. roseum with the green nonsulfur (GNS) bacteria is based on ribosomal RNA sequence comparisons (Oyaizu et al., 1987). The sequence of 5S rRNA from T. roseum (Van den Eynde et al., 1990) affirms that it should be clustered with Chloroflexus. Herpetosiphon and Chloroflexus, the other representatives in this branch, are markedly different phenotypically from T. roseum (for a review see Kristjansson and Alfredsson, 1992). Although the GNS bacteria share some common ribosomal characters, they are the progeny of a deep phylogenetic divergence (Gibson et al., 1985); Herpetosiphon is a mesophile and more rapidly evolving than either Chloroflexus or Thermomicrobium. The deepest branching in eubacterial evolution...
KeywordsMethyl Viologen Deionized Distil Water Diaminopimelic Acid Muramic Acid Substrate Utilization Pattern
- Allen, M. B. 1959 Studies with Cyanidium caldarium, an anomously pigmented chlorophyte Arch. Microbiol. 32 270–277Google Scholar
- Gribaldo, S., V. Lumia, R. Creti, E.C. deMacario, A. Sanangelantoni, and P. Cammarano. 1999 Discontinuous occurrence of the hsp70 (dnaK) gene among Archaea and sequence features of HSP70 to suggest a novel outlook on phylogenies inferred from this protein J. Bacteriol. 181 434–443PubMedGoogle Scholar
- Kristjansson, J. K., and G. A. Alfredsson. 1992 The heterotrophic, thermophilic genera Thermomicrobium, Rhodothermus, Saccharococcus, Acidothermus, and Scotothermus In: J. K. Kristjansson (Ed.) Thermophilic Bacteria CRC Press Boca Raton FL 63–76Google Scholar
- Van den Eynde, H., Y. Van de Peer, J. Perry, and R. De Wachter. 1990 5S rRNA sequences of representatives of the genera Chlorobium, Prosthecochloris, Thermomicrobium, Cytophaga, Flavobacterium, Flexibacter, and Saprospira, and a discussion of the evolution of eubacteria in general J. Gen. Microbiol. 136 11–18PubMedCrossRefGoogle Scholar