A molecular phylogeny of enteric bacteria and implications for a bacterial species concept

  title={A molecular phylogeny of enteric bacteria and implications for a bacterial species concept},
  author={John E. Wertz and Carla Goldstone and David M Gordon and Margaret Riley},
  journal={Journal of Evolutionary Biology},
A molecular phylogeny for seven taxa of enteric bacteria (Citrobacter freundii, Enterobacter cloacae, Escherichia coli, Hafnia alvei, Klebsiella oxytoca, Klebsiella pneumoniae, and Serratia plymuthica) was made from multiple isolates per taxa taken from a collection of environmental enteric bacteria. Sequences from five housekeeping genes (gapA, groEL, gyrA, ompA, and pgi) and the 16s rRNA gene were used to infer individual gene trees and were concatenated to infer a composite molecular… 

Phylogeny and species identification of the family Enterobacteriaceae based on dnaJ sequences.

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The data suggest that 16S rDNA, while effective for both species-level and family- level phylogenetic reconstruction, may underperform for genus-level phylogenetic analyses in the Enterobacteriaceae.

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Recombination in Escherichia coli and the definition of biological species

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Intergeneric transfer and recombination of the 6-phosphogluconate dehydrogenase gene (gnd) in enteric bacteria.

  • K. NelsonR. Selander
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1994
The relatively frequent exchange of gnd within and among taxonomic groups of the Enterobacteriaceae, compared with other housekeeping genes, apparently results from its close linkage with genes that are subject to diversifying selection, including those of the rfb region determining the structure of the O antigen polysaccharide.

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The non-random distribution of these species demonstrates the presence of extensive population structure and may suggest the existence of adaptations specific to both the primary and secondary habitats of these enteric bacteria.

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An 1871-nucleotide region including the phoA gene (the structural gene encoding alkaline phosphatase, EC 3.3.1) was cloned and sequenced from eight naturally occurring strains of Escherichia coli implying that intragenic recombination has played a major role in determining the evolutionary history of the nine alleles.

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This review considers the cumulative knowledge about the Archaea in relationship to the Bacteria and Eucarya and the recent use of molecular phylogenetic approaches to reconstructing the tree of life.

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It is proposed that a formal system of organisms be established in which above the level of kingdom there exists a new taxon called a "domain." Life on this planet would be seen as comprising three domains, the Bacteria, the Archaea, and the Eucarya, each containing two or more kingdoms.

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The genome sequence of Thermotoga maritima revealed that 24% of its open reading frames (ORFs) showed the highest similarity scores to archaeal genes in BLAST analyses. Here we screened 16 strains