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Abstract

In this study, a novel betaproteobacterium, strain DPN7, was isolated under mesophilic conditions from compost because of its capacity to utilize the organic disulfide 3,3′-dithiodipropionic acid. Analysis of the 16S rRNA gene sequence of strain DPN7 revealed 98.5 % similarity to that of LMG 22695. Values for sequence similarity to members of the genera , and , the nearest neighbours of the genus , were about 95 % or less. The DNA G+C content of strain DPN7 was 55.1 mol%. The level of DNA–DNA hybridization between strain DPN7 and LMG 22695 was 41 %, whereas it was much lower between strain DPN7 and LMG 1229 (7 %) or LMG 18538 (5 %). This genotypic divergence was supported by differences in biochemical and chemotaxonomic characteristics. For this reason, and because of the differences in the protein and fatty acid profiles, strain DPN7 should be classified within a novel species of , for which the name sp. nov. is proposed. The type strain is strain DPN7 (=DSM 17166=LMG 22922).

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2006-06-01
2020-01-22
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vol. , part 6, pp. 1305 - 1310

Phase-contrast micrograph of cells of DPN7 . Bar, 2 µm.



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