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  • Title: Characterization of two aerobic ultramicrobacteria isolated from urban soil and a description of Oxalicibacterium solurbis sp. nov.
    Author: Sahin N, Gonzalez JM, Iizuka T, Hill JE.
    Journal: FEMS Microbiol Lett; 2010 Jun; 307(1):25-9. PubMed ID: 20370834.
    Abstract:
    Two strains of aerobic, non-spore-forming, Gram-negative, rod-shaped bacteria (ND5 and MY14(T)), previously isolated from urban soil using the membrane-filter enrichment technique, were characterized. Analysis of their 16S rRNA gene sequence grouped strains ND5 and MY14(T) within the family Oxalobacteraceae (Betaproteobacteria). The highest pairwise sequence similarities for strain ND5 were found with members of the genus Herminiimonas, namely with Herminiimonas saxobsidens NS11(T) (99.8%) and Herminiimonas glaciei UMB49(T) (99.6%). Although some fatty acid profiles, physiological and biochemical differences exist between strain ND5 and the respective Herminiimonas-type strains, DNA-DNA hybridization experiments confirm that strain ND5 is a member of the H. glaciei genospecies. Taxonomical analyses revealed a wider range of variability within this genus than considered previously. The highest pairwise nucleotide similarity for strain MY14(T) was found with Oxalicibacterium flavum (96.8%). Phylogenetic analyses based on 16S rRNA and cpn60 gene sequences, DNA-DNA hybridization, fatty acid profiles, physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain MY14(T) from other Oxalicibacterium species representing a new species, for which the name Oxalicibacterium solurbis sp. nov. (type strain MY14(T)=NBRC 102665(T),=CCM 7664(T)) is proposed.
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