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Abstract

An aerobic, non-motile, Gram-stain-negative, red-to-pinkish and rod-shaped bacterium, designated 9PBR-2, was isolated from an abandoned lead–zinc ore sample collected from Meizhou, Guangdong Province, PR China. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain 9PBR-2 belongs to the genus Hymenobacte r and was most closely related to Hymenobacter rigui KCTC 12533 (98.0 %), Hymenobacter swuensis KCTC 32018 (97.8 %) and Hymenobacter perfusus LMG 26000 (97.6 %). The calculated average nucleotide identity values based on whole genome sequences between strain 9PBR-2 and closely related type strains ranged from 81.3 to 84.1 %. Correspondingly, the digital DNA-DNA hybridization values ranged from 25.5 to 28.1 %. The major fatty acids of strain 9PBR-2 were iso-C15:0, anteiso-C15:0, C16:1 ω5c, summed feature 3 (C16:1 ω6c and/or C16:1 ω7c) and summed feature 4 (iso-C17:1 I and/or anteiso-C17:1 B). It contained menaquinone 7 (MK-7) as the major isoprenoid quinone and phosphatidylethanolamine as the major polar lipid. The genomic DNA G+C content based on whole genome sequence was 59.8 mol%. Characterization based on phylogenetic, chemotaxonomic and phenotypic analyses clearly indicated that strain 9PBR-2 represents a novel species of the genus Hymenobacter , for which the name Hymenobacter metallilatus sp. nov. is proposed. The type strain is 9PBR-2 (=GDMCC 1.1492=JCM 32699).

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2019-05-23
2019-09-22
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