Phylogenetic analyses of type and reference strains of Obesumbacterium proteus biogroups 1 and 2 plus a novel isolate of biogroup 2 were carried out based on 16S rRNA gene sequences and partial sequences of four protein-coding genes (fusA, leuS, pyrG and rpoB). Both approaches revealed that O. proteus biogroup 1 strains were closely related to Hafnia alvei. Biogroup 2 strains, however, formed a distinct monophyletic clade of generic status that included Escherichia blattae. Phenotypic tests were consistent with the molecular classification and provided diagnostic features. It is proposed that biogroup 2 strains be placed in a new genus, Shimwellia gen. nov., as Shimwellia pseudoproteus sp. nov., with strain 521T (5DSM 3038T5LMG 24835T5NCIMB 14534T) as the type strain, and that Escherichia blattae be transferred to the genus Shimwellia as Shimwellia blattae comb. nov., with strain ATCC 29907T (=DSM 4481T) as the type strain. © 2010 IUMS.
|Number of pages||6|
|Journal||International Journal of Systematic and Evolutionary Microbiology|
|Publication status||Published - Apr 2010|