Tuwongella immobilis gen. nov., sp. nov., a novel non-motile bacterium within the phylum planctomycetes

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Abstract

A gram-negative, budding, catalase negative, oxidase positive and non-motile bacterium (MBLW1T) with a complex endomembrane system has been isolated from a freshwater lake in southeast Queensland, Australia. Phylogeny based on 16S rRNA gene sequence analysis places the strain within the family Planctomycetaceae, related to Zavarzinella formosa (93.3 %), Telmatocola sphagniphila (93.3 %) and Gemmata obscuriglobus (91.9 %). Phenotypic and chemotaxonomic analysis demonstrates considerable differences to the type strains of the related genera. MBLW1T displays modest salt tolerance and grows optimally at pH values of 7.5-8.0 and at temperatures of 32-36 °C. Transmission electron microscopy analysis demonstrates the presence of a complex endomembrane system, however, without the typically condensed nucleoid structure found in related genera. The major fatty acids are 16 : 1 ω5c, 16 : 0 and 18 : 0. Based on discriminatory results from 16S rRNA gene sequence analysis, phenotypic, biochemical and chemotaxonomic analysis, MBLW1T should be considered as a new genus and species, for which the name Tuwongella immobilis gen. nov., sp. nov. is proposed. The type strain is MBLW1T (=CCUG 69661T=DSM 105045T).

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Seeger, C., Butler, M. K., Yee, B., Mahajan, M., Fuerst, J. A., & Andersson, S. G. E. (2017). Tuwongella immobilis gen. nov., sp. nov., a novel non-motile bacterium within the phylum planctomycetes. International Journal of Systematic and Evolutionary Microbiology, 67(12), 4923–4929. https://doi.org/10.1099/ijsem.0.002271

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