Fig. 1

The phylogenetic tree highlighting the position of Nitrosospira briensis C-128 relative to other Nitrosomonadaceae [48] and Spirillum volutans (outgroup). The tree was inferred from 1417 aligned characters of the 16S rRNA gene sequence by the neighbour-joining method [49] using the sotware MEGA [50]. Support values (%) at branch points are from 1000 NJ bootstrap replicates and shown only for values exceeding 60 %. GenBank references are for genomes (full-length 16S rRNA gene extracted) or are the near full-length 16S rRNA sequences [51]. Bold denotes a genome sequence available (NCBI or GOLD), whereas bold blue denotes the published genomes: Nitrosomonas europaea [52], “Nitrosomonas eutropha” [53], “Nitrosomonas communis” [54], Nitrosomonas sp. AL212 [55], “Nitrosomonas ureae” [56], Nitrosomonas sp. Is79A3 [57], Nitrosospira briensis C-128 (this study), Nitrosospira lacus APG3 [11] and Nitrosospira multiformis [12]