Hymenobacter metallilatus sp. nov., isolated from abandoned lead-zinc ore

An aerobic, non-motile, Gram-stain-negative, red-to-pinkish and rod-shaped bacterium, designated 9PBR-2^T, 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^T belongs to the genus Hymenobacter and was most closely related to Hymenobacter rigui KCTC 12533^T (98.0 %), Hymenobacter swuensis KCTC 32018^T (97.8 %) and Hymenobacter perfusus LMG 26000^T (97.6 %). The calculated average nucleotide identity values based on whole genome sequences between strain 9PBR-2^T 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^T were iso-C15:0, anteiso-C15:0, C16:1ω5c, summed feature 3 (C16:1ω6c and/or C16:1ω7c) 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^T represents a novel species of the genus Hymenobacter, for which the name Hymenobactermetallilatus sp. nov. is proposed. The type strain is 9PBR-2^T (=GDMCC 1.1492^T=JCM 32699^T).