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International journal of systematic bacteriology

Reassessment of the phylogenetic position of Caulobacter subvibrioides.


PMID 8995825

Abstract

Determination of the 16S rRNA gene sequence of Caulobacter subvibrioides ATCC 15264T (T = type strain) confirmed that this species is a member of the alpha subclass of the Proteobacteria and showed that it is phylogenetically most closely related to the Caulobacter group comprising the species Caulobacter bacteroides, Caulobacter crescentus, and Brevundimonas (Pseudomonas) diminuta, for which 16S rRNA sequences of the type strains are currently available. The closest known relative of strain ATCC 15264T among these species is B. diminuta (level of direct pairwise sequence similarity, 95%). On the basis of its previously determined 16S rRNA sequence (accession number M83797), C. subvibrioides is most closely related to Sphingomonas adhaesiva in the alpha-4 subgroup (level of similarity, 97.7%). Analysis of the hydroxy fatty acids of C. subvibrioides ATCC 15264T showed that the 2-hydroxymyristic acid which is characteristic of the genus Sphingomonas was absent.

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