A Gram-negative, strictly aerobic, motile, filamentous and viscous exopolymer-producing bacterium, designated strain YT21, was isolated from fresh water. Phylogenetic analysis of the 16S rRNA gene sequence indicated that strain YT21 lies within a cluster containing the established genera , , and in the phylum . However, the isolate represented a lineage distinct from these genera, with sequence similarities ranging from 88.9 to 91.8 %. The genomic G+C content was 45.2 mol%. The predominant isoprenoid quinone was MK-7. The major fatty acids were 15 : 0 iso, 17 : 0 iso 3-OH and 15 : 1 iso G. On the basis of morphological features and phenotypic and phylogenetic data, strain YT21 represents a novel genus and species, for which the name gen. nov., sp. nov. is proposed. The type strain of is strain YT21 (=NBRC 104114 =DSM 21054).


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vol. , part 5, pp. 1137 - 1142

Culture plates of strain YT21 and micrographs of peripheral part of gliding zone. [PDF](5949 KB)

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