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Phenylobacterium ferrooxidans sp. nov., isolated from a sub-surface geothermal aquifer in Iceland. | LitMetric

Phenylobacterium ferrooxidans sp. nov., isolated from a sub-surface geothermal aquifer in Iceland.

Syst Appl Microbiol

Univ Brest, CNRS, IFREMER, EMR 6002 BIOMEX, Unité Biologie et Écologie des Écosystèmes marins Profonds BEEP, F-29280 Plouzané, France. Electronic address:

Published: December 2024

AI Article Synopsis

Article Abstract

A novel bacterial strain, HK31-G, was isolated from a subsurface geothermal aquifer (Hellisheidi, SW-Iceland) and was characterized using a polyphasic taxonomic approach. Phylogenetic analysis of 16S rRNA gene along with phylogenomic position indicated that the novel strain belongs to the genus Phenylobacterium. Cells are motile Gram-negative thin rods. Physiological characterization showed that strain HK31-G is a mesophilic bacterium able to grow from 10 to 30 °C, at pH values between 6 and 8 and at NaCl concentrations between 0 and 0.5 %. Optimal growth was observed without sodium chloride at 25 °C and pH 6. Strain HK31-G is chemoorganoheterotroph and its major saturated fatty acids are Cω7c, Cω6c and C, the predominant quinone is Q-10 and the major polar lipid is phosphatidylglycerol. The new strain also possesses the capacity to use ferrous iron (Fe(II)) as the sole energy source and can also be considered as a chemolithoautotrophic microorganism. The overall genome of strain HK31-G was estimated to be 4.46 Mbp in size with a DNA G + C content of 67.95 %. Genes involved in iron metabolism were identified, but no genes typically involved in Fe(II)-oxidation were found. According to the overall genome relatedness indices (OGRI) values, six MAGs from groundwater have been assigned to the same species as the new strain HK31-G. Furthermore, OGRI values between the genome of strain HK31-G and the genomes of its closest relatives are below the species delineation threshold. Therefore, given the polyphasic approach used, strain HK31-G represents a novel species of the genus Phenylobacterium, for which the name Phenylobacterium ferrooxidans sp. nov. is proposed. The type strain is HK31-G (DSM 116432 = UBOCC-M-3429 = LMG 33376).

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Source
http://dx.doi.org/10.1016/j.syapm.2024.126578DOI Listing

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