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Int J Syst Evol Microbiol 54 (2004), 871-875; DOI  10.1099/ijs.0.02868-0
© 2004 International Union of Microbiological Societies

Phylogeny of Firmicutes with special reference to Mycoplasma (Mollicutes) as inferred from phosphoglycerate kinase amino acid sequence data

Matthias Wolf1, Tobias Müller1, Thomas Dandekar1 and J. Dennis Pollack2

1 University of Würzburg, Department of Bioinformatics, Biocenter, Am Hubland, 97074 Würzburg, Germany
2 Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University, 2066 Graves Hall, 333 West 10th Avenue, Columbus, OH 43210, USA

Correspondence
Thomas Dandekar
dandekar{at}biozentrum.uni-wuerzburg.de
J. Dennis Pollack
pollack.1{at}osu.edu

The phylogenetic position of the Mollicutes has been re-examined by using phosphoglycerate kinase (Pgk) amino acid sequences. Hitherto unpublished sequences from Mycoplasma mycoides subsp. mycoides, Mycoplasma hyopneumoniae and Spiroplasma citri were included in the analysis. Phylogenetic trees based on Pgk data indicated a monophyletic origin for the Mollicutes within the Firmicutes, whereas Bacilli (Firmicutes) and Clostridia (Firmicutes) appeared to be paraphyletic. With two exceptions, i.e. Thermotoga (Thermotogae) and Fusobacterium (Fusobacteria), which clustered within the Firmicutes, comparative analyses show that at a low taxonomic level, the resolved phylogenetic relationships that were inferred from both the Pgk protein and 16S rRNA gene sequence data are congruent.

Abbreviations: ML, maximum-likelihood; MP, maximum-parsimony; NJ, neighbour-joining; Pgk, phosphoglycerate kinase

Published online ahead of print on 12 December 2003 as DOI 10.1099/ijs.0.02868-0.

The GenBank/EMBL/DDBJ accession numbers for the Pgk sequences of Mycoplasma mycoides subsp. mycoides, Spiroplasma citri and Mycoplasma hyopneumoniae are BX293980, AJ580006 and AY319328, respectively.




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