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A yellow-coloured bacterial strain, designated BP-5T, was isolated from a water sample of a cold spring located in the Hsinchu area of northern Taiwan. Cells of the strain were Gram-negative, non-spore-forming rods with a polar flagellum. The isolate was able to grow at 15–42 °C, 0–1 % NaCl and pH 6–8. The predominant fatty acids were summed feature 3 (C16 : 1 ω7c and/or iso-C15 : 0 2-OH), C16 : 0 and C18 : 1 ω7c. The major respiratory quinone was ubiquinone 8. The DNA G+C content was 63.2 mol%. 16S rRNA gene sequence analysis indicated that strain BP-5T belonged to the class Betaproteobacteria and was a member of the family Neisseriaceae. Its closest phylogenetic neighbours were Gulbenkiania mobilis E4FC31T (95.0 % 16S rRNA gene sequence similarity), Chromobacterium subtsugae PRAA4-1T (95.0 %), Chromobacterium violaceum ATCC 12472T (94.3 %), Vogesella indigofera ATCC 19706T (93.8 %) and Aquitalea magnusonii TRO-001DR8T (93.7 %). On the basis of the evidence from this polyphasic study, strain BP-5T is considered to represent a novel species of a new genus, for which the name Pseudogulbenkiania subflava gen. nov., sp. nov. is proposed. The type strain of Pseudogulbenkiania subflava is BP-5T (=BCRC 17727T =LMG 24211T).
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