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Frigoriflavimonas asaccharolytica gen. nov., sp. nov., a novel psychrophilic esterase and protease producing bacterium isolated from Antarctica

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Abstract

The rod-shaped and Gram-stain-negative bacterial strain 16FT, isolated from an air sample collected at King George Island, maritime Antarctica, was investigated to determine its taxonomic status. Strain 16FT is strictly aerobic, catalase positive, oxidase positive and non-motile. Strain 16FT hydrolyses casein, lecithin, Tween 20, 60 and 80, but not aesculin, gelatin and starch. Growth of strain 16FT is observed at 0–20 °C (optimum 10 °C), pH 5.0–8.0 (optimum pH 6.0), and in the presence of 0–2.0% NaCl (optimum 0.5%). The predominant menaquinone is MK-6, and the major fatty acids comprise anteiso-C15:0 and iso-C15:0. The major polar lipids are phosphatidylethanolamine, ornithine lipid OL2, unidentified phospholipid PL1 and the unidentified lipids L3 and L6 lacking functional groups. The DNA G + C content based on the draft genome sequence is 32.3 mol%. Sequence analysis of the 16S rRNA gene indicates the highest similarity to Kaistella palustris 3A10T (95.4%), Kaistella chaponensis Sa 1147-06 T (95.2%), Kaistella antarctica AT1013T (95.1%), Kaistella carnis NCTC 13525 T (95.1%) and below 95.0% to other species with validly published names. Phylogenetic analysis based on 16S rRNA gene and whole-genome sequences places strain 16FT in a distinct branch, indicating a separate lineage within the family Weeksellaceae. Based on the data from our polyphasic approach, 16FT represents a novel species of a new genus, for which the name Frigoriflavimonas asaccharolytica gen. nov, sp. nov. is proposed. The type strain is 16FT (= CCM 8975 T = CGMCC No.1.16844 T).

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Acknowledgements

To the Uruguayan Antarctic Institute and the staff of the Artigas Antarctic Scientific Base during the summer 2018 campaign. RJM is PEDECIBA and ANII researcher.We are grateful to Professor Aharon Oren (The Hebrew University of Jerusalem, Israel) for the Latin construction of the taxa names.

Funding

The work conducted by the U.S. Department of Energy Joint Genome Institute, a DOE Office of Science User Facility, was supported by the Office of Science of the U.S. Department of Energy under contract number DE-AC02-05CH11231.

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Correspondence to Rodolfo Javier Menes.

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The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence for strain 16FT is MN007167. The Whole Genome Shotgun project has been deposited at DDBJ/ENA/GenBank under the accession JABSNO000000000. The version described in this paper is version JABSNO000000000.1.

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Menes, R.J., Machin, E.V., Roldán, D.M. et al. Frigoriflavimonas asaccharolytica gen. nov., sp. nov., a novel psychrophilic esterase and protease producing bacterium isolated from Antarctica. Antonie van Leeuwenhoek 114, 1991–2002 (2021). https://doi.org/10.1007/s10482-021-01656-x

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