Apr 1, 1997

Phylogeny of Thiobacillus cuprinus and other mixotrophic thiobacilli: proposal for Thiomonas gen. nov

International Journal of Systematic Bacteriology
D Moreira, Ricardo Amils


The complete 5S and 16S ribosomal DNA (rDNA) sequences of the facultatively chemolithotrophic bacterium Thiobacillus cuprinus and results of a comparison of these sequences with homologous sequences from several proteobacterial species supported affiliation of T. cuprinus with the beta 1 subgroup of the Proteobacteria. T. cuprinus, Thiobacillus intermedius, Thiobacillus perometabolis, and Thiobacillus thermosulfatus form a phylogenetic cluster that comprises some of the thiobacilli capable of mixotrophic growth. This cluster is related to some pseudomonads and Alcaligenes species belonging to the beta subclass. In addition, a low-frequency restriction fragment analysis (LFRFA) of some mixotrophic thiobacilli and some related species was carried out by using pulsed-field gel electrophoresis (PFGE) to determine the SpeI and XbaI macrorestriction patterns and genome sizes of these organisms. The correlation of the LFRFA results and the 16S rDNA analysis results and the usefulness of the two analyses are discussed. The PFGE fingerprints suggested that Thiobacillus sp. strain ATCC 27793 is related to T. intermedius rather than to T. perometabolis, as described previously. The distinctive characteristics of the mixotrophic species an...Continue Reading

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Mentioned in this Paper

Talaromyces intermedius
Restriction Fragment Length Polymorphism
Thiomonas perometabolis
DNA, Ribosomal
Thiomonas cuprina
RNA, Ribosomal, 5S
Recombinant DNA
Thermoactinomyces intermedius

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