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Int J Syst Evol Microbiol 55 (2005), 1021-1026; DOI  10.1099/ijs.0.63510-0
© 2005 International Union of Microbiological Societies

Genomic analysis of Hyphomonas neptunium contradicts 16S rRNA gene-based phylogenetic analysis: implications for the taxonomy of the orders ‘Rhodobacterales’ and Caulobacterales

Jonathan H. Badger, Jonathan A. Eisen and Naomi L. Ward

The Institute for Genomic Research, 9712 Medical Center Dr., Rockville, MD 20850, USA

Correspondence
Jonathan H. Badger
jbadger{at}tigr.org

Hyphomonas neptunium is a marine prosthecate {alpha}-proteobacterium currently classified as a member of the order ‘Rhodobacterales’. Although this classification is supported by 16S rRNA gene sequence phylogeny, 23S rRNA gene sequence analysis, concatenated ribosomal proteins, HSP70 and EF-Tu phylogenies all support classifying Hyphomonas neptunium as a member of the Caulobacterales instead. The possible reasons why the 16S rRNA gene sequence gives conflicting results in this case are also discussed.

Abbreviations: JGI, Joint Genome Institute; TIGR, The Institute for Genomic Research

Published online ahead of print on 3 December 2004 as DOI 10.1099/ijs.0.63510-0.

Newick tree files and FASTA-format sequence alignments used to generate the trees are available as supplementary information in IJSEM Online.




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