Abstract
Two novel strains, BT213T and BT327T, were isolated from the soil collected in Uijeongbu city, Korea. Cells of strains were Gram negative, aerobic, and non-motile. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains BT213T and BT327T formed two distinct lineages within the family Hymenobacteraceae (order Cytophagales, class Cytophagia). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain BT213T and BT327T belonged to the genus Pontibacter. Strain BT213T showed the highest similarities of 97.8% with Pontibacter deserti JC215T. Strain BT327T showed the highest sequence similarity of 96.5% with Pontibacter mucosus PB3T. Optimal growth occurred at 25°C, pH 7, and in the absence of NaCl. The major cellular fatty acid of strains BT213T and BT327T were iso-C15:0 and summed feature 4 (iso-C17:1 I/anteiso-C17:1 B). Strains BT213T and BT327T had MK-7 as major respiratory quinone and phosphatidylethanolamine as major polar lipids. The genome size of strains BT213T and BT327T were 4,072,018bp and 4,314,171bp, respectively. The genomic G + C mol% of strains BT213T and BT327T are 45.6% and 46.1%, respectively. Based on biochemical, chemotaxonomic, and phylogenetic analysis, two novel species Pontibacter fetidus BT213T (KCTC 72345T = NBRC 114379T) and Pontibacter burrus BT327T (KCTC 72412T = NBRC 114376T) are proposed as type strains.
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