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Abstract

A Gram-negative, facultatively anaerobic bacterial strain designated GPTSA-6 was isolated from a water sample collected from a warm spring in Assam, India. Preliminary analysis of the 16S rRNA gene sequence of this isolate revealed its affiliation to the family . Detailed characterization using a polyphasic approach indicated that strain GPTSA-6 is most closely related to but differs significantly from existing members of the genus . Analysis of the almost-complete (1430 nt) 16S rRNA gene sequence of this strain revealed that its closest relative (99.23 % similarity) is an uncultured bacterial clone, A-8, isolated from an algal bloom. Of the taxa with validly published names, ATCC 43979 showed the highest level of sequence similarity (95.13 %) with respect to strain GPTSA-6, followed by 848T and LMG 17541 (95.04 % similarity in both cases). On the basis of the phenotypic, chemotaxonomic and phylogenetic data, it can be concluded that strain GPTSA-6 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is GPTSA-6 (=MTCC 7090=DSM 17445).

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2006-08-01
2020-01-27
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vol. , part 8, pp. 1905 - 1909

Transmission electron micrograph of a cell of strain GPTSA-6 showing a polar flagellum. Bar 500 nm.



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