Abstract
We have compared the sequence and gene order of meta-cleavage pathway operons from α- and γ-subgroups of the Proteobacteria with operons from Burkholderia sp. strain RP007 which belongs to the β-subgroup of the Proteobacteria. Burkholderia RP007 was isolated for its ability to degrade phenanthrene and contains two meta-cleavage operons. One exhibits a comparable gene order to previously characterised γ-subgroup Proteobacterial (Pseudomonas) meta operons, whilst the other has distinctive features present in both α- and γ-subgroup Proteobacterial (Sphingomonas and Pseudomonas) meta operons. Gene sequence conservation, highlighted by examining the phylogeny of Proteobacterial catechol 2,3-dioxygenase sequences, reveals that sequences generally cluster in a manner which correlates with the taxonomic grouping of the Proteobacterial subgroup from which they originated.
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