Comamonas phosphati sp. nov., isolated from a phosphate mine

Area of Science:

• Microbiology
• Bacteriology
• Taxonomy

Background:

• The genus Comamonas encompasses diverse bacterial species with various environmental roles.
• Isolation of novel bacteria from unique environments like phosphate mines can reveal new microbial diversity and functions.

Purpose of the Study:

• To characterize a novel bacterial strain isolated from a phosphate mine in China.
• To determine the taxonomic placement of the novel strain within the genus Comamonas.

Main Methods:

• Phylogenetic analysis using 16S rRNA gene sequencing.
• DNA-DNA hybridization to assess genetic relatedness.
• Analysis of phenotypic characteristics, including cell shape, motility, and Gram staining.
• Determination of DNA G+C content.
• Identification of respiratory quinones, polar lipids, and fatty acid profiles.

Main Results:

• Strain WYH 22-41T is a Gram-negative, facultatively anaerobic, motile rod.
• Phylogenetic analysis showed high 16S rRNA gene similarity to Comamonas terrae, Comamonas odontotermitis, and Comamonas aquatica.
• DNA-DNA hybridization values were below the threshold for species delineation (33.2% with C. terrae).
• The DNA G+C content was 62.4 mol%.
• Fatty acid and polar lipid profiles were consistent with the genus Comamonas but distinct enough to differentiate the novel strain.

Conclusions:

• Strain WYH 22-41T represents a novel species within the genus Comamonas.
• The proposed name for this new species is Comamonas phosphati sp. nov.
• The type strain is WYH 22-41T (CGMCC 1.12294T = DSM 26017T).