Abstract
A yellow-coloured bacterial strain, designated ZY74T, was isolated from arsenic contaminated soil (34 mg kg-1) sample collected in Longkou, Hubei Province, PR China. Cells were Gram-stain-negative, aerobic, non-motile and rod-shaped. Strain ZY74T produced round, yellow-pigmented, smooth and opaque colonies. Based on the results of 16S rRNA gene sequence analysis, strain ZY74T was found to be affiliated with members of the genus Chitinophaga. Its closest members were Chitinophagabarathri YLT18T (97.72 %) and Chitinophaganiabensis JS13-10T (97.17 %). The genome size of strain ZY74T was 6.61 Mb, containing 5351 predicted protein-coding genes, with a DNA G+C content of 55.0 mol%. The average nucleotide identity values of strain ZY74T with C. barathri YLT18T and C. niabensis DSM 24787T were 76.12 and 73.32 %, respectively. The digital DNA-DNA hybridization values of strain ZY74T with C. barathri YLT18T and C. niabensis JS13-10T were 20.60 and 19.40 %, respectively. The major respiratory quinone was menaquinone 7 and the predominant fatty acids (>5 %) were iso-C15:0, C16 : 1ω5c and iso-C17 : 03-OH. On the basis of phylogenetic, genotypic, phenotypic and chemotaxonomic characterization, strain ZY74T represents a novel species in the genus Chitinophaga, for which the name Chitinophagalutea sp. nov. is proposed. The type strain is ZY74T (=CCTCC AB2018369T=KCTC 72039T).
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