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Abstract

A yellow-coloured, Gram-stain-negative, non-sporulating, psychrotolerant and motile bacterium, designated AR-3-1, was isolated from the Arctic soil of Cambridge Bay, Nunavut, Canada. Strain AR-3-1 could grow at 4–32 °C and pH 5.0– 11.0. Phylogenetic analysis based on its 16S rRNA gene sequence indicated that strain AR-3-1 formed a lineage within the family and clustered as a member of the genus . The closest members within this genus were CU4 (98.1 % sequence similarity), VC-230 (97.6 %) and DS20 (97.5 %). The only respiratory quinone was the ubiquinone Q-10. Spermidine was the predominant polyamine. The principal cellular fatty acids were summed feature 8 (C 7 and/or C 6), summed feature 3 (iso-C 2-OH and/or C 7), C and C 2-OH. The major polar lipids were phosphatidylethanolamine, phosphatidylmonomethylethanolamine, phosphatidyldimethylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, sphingoglycolipid and phosphoglycolipid. The DNA G+C content was 63.1 %. The average nucleotide identity and DNA–DNA hybridization relatedness values between strain AR-3-1 and its most closely related genus members were ≤89.6 and 39.6 %, respectively. The genome was 5 162 327 bp long, with 83 scaffolds and 4824 protein-coding genes. The genome showed six putative biosynthetic gene clusters responsible for various secondary metabolites. Based on this polyphasic study, strain AR-3-1 represents a novel species within the genus , for which the name sp. nov. is proposed. The type strain is AR-3-1 (=KACC 21613=NBRC 114604).

Funding
This study was supported by the:
  • National Research Foundation (KR) (Award 2019R1F1A1058501)
    • Principle Award Recipient: JaisooKim
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2021-02-17
2022-01-25
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