1887

Abstract

The genus and the species were recharacterized by using the type strain (NRIC 0498), three reference strains and 10 methanol-utilizing bacteria that were isolated from activated sludge from three different sewage-treatment plants in Tokyo. Based on 16S rDNA sequences, all strains formed a single cluster within the that was clearly different from the genera , , , and . The 14 strains were identified as a single species, , by DNA–DNA similarities, showed DNA G+C contents that ranged from 62 to 63 mol% and had Q-10 as the major quinone, accounting for >87 % of total ubiquinones. Cells of had a single polar flagellum (or occasionally polar tuft flagella); this differs from a previous study that described peritrichous flagella. Oxidation of acetate was positive for all strains, but oxidation of lactate was weakly positive and varied with strains. Dihydroxyacetone was not produced from glycerol. Pantothenic acid was an essential requirement for growth. The strains tested grew at mostly the same extent at pH 3·0–8·0. Therefore, should be regarded as acidotolerant, not acidophilic. The descriptions of the genus and the species Urakami, Tamaoka, Suzuki and Komagata 1989 are emended with newly obtained data.

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2004-05-01
2024-03-29
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