Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 71, Issue 3, Pages -Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijsem.0.004651
Keywords
Cosenzaea; Genome-based phylogeny; Proteus; Proteus terrae subsp; terrae subsp; nov; Proteus terrae subsp; cibarius subsp; nov
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Funding
- Federal Ministry of Food and Agriculture (BMEL)
- Ministry for Science, Research and Culture of the State of Brandenburg (MWFK)
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The study re-evaluated the taxonomy and nomenclature of Proteus and Cosenzaea, suggesting the use of Proteus myxofaciens as the appropriate name, and classifying Proteus cibarius as a subspecies of Proteus terrae. Furthermore, it revealed a close relationship between Proteus genomospecies 5 and P. terrae subsp. terrae, assigning them to the same subspecies.
The genera Proteus and Cosenzaea are closely related members of the family Morganellaceae. The genus Cosenzaea consists of the species Cosenzaea myxofaciens originally separated from the genus Proteus by rpoB gene analysis. Due to the high similarity of the 16S rRNA genes between species of both genera, the taxonomic status is here re- evaluated by a genome- based approach. Based on a core genome phylogeny and genome relatedness indices, it is shown that the taxonomy and nomenclature given for the basonym Proteus myxofaciens is more appropriate. Therefore, we propose to use this name in preference. Furthermore, the species status of Proteus terrae and Proteus cibarius was reassessed. Both species are related at subspecies level by digital DNA?DNA hybridization (dDDH) analysis. Additionally, average amino acid identity (AAI) and average nucleotide identity (ANI) do not support a separate species status, and therefore it is proposed to classify P. cibarius as a subspecies of P. terrae. Consequently, both species are being renamed Proteus terrae subsp. cibarius subsp. nov. and Proteus terrae subsp. terrae subsp. nov., respectively. The genome relatedness indices revealed a close relationship of the Proteus genomospecies 5 with P. terrae subsp. terrae. Thus, it has been assigned to the same subspecies.
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