Frateuria flava sp. nov., isolated from soil

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Genomics

Background:

• Soil harbors a vast diversity of microorganisms with potential novel properties.
• The genus Frateuria comprises bacteria with diverse metabolic capabilities.
• Accurate taxonomic classification is crucial for understanding microbial roles and potential applications.

Purpose of the Study:

• To isolate and characterize a novel bacterial strain from a soil sample.
• To determine the taxonomic position of the novel strain using polyphasic characterization.
• To propose a new species within the genus Frateuria.

Main Methods:

• Isolation and cultivation of bacteria from soil samples.
• Phenotypic characterization including Gram staining, morphology, growth conditions, and biochemical tests.
• Phylogenetic analysis based on 16S rRNA gene sequencing.
• Genomic analysis including draft genome sequencing, Average Nucleotide Identity (ANI), and digital DNA-DNA hybridization (dDDH).
• Chemotaxonomic analysis of quinones and fatty acids.

Main Results:

• A novel Gram-negative, aerobic, rod-shaped bacterium, strain MAH-13T, was isolated.
• Strain MAH-13T showed optimal growth at 20-40 °C, pH 5.0-10.0, and 0-1.0% NaCl.
• Phylogenetic analysis placed strain MAH-13T within the genus Frateuria, closely related to Frateuria terrea.
• ANI and dDDH values supported the classification of MAH-13T as a distinct species.
• Genomic DNA G+C content was 68.0 mol%, with ubiquinone 8 as the predominant quinone and iso-C15:0, iso-C16:0, and summed feature 9 as major fatty acids.

Conclusions:

• Strain MAH-13T represents a novel species within the genus Frateuria.
• The proposed name for the novel species is Frateuria flava sp. nov.
• The type strain for this new species is MAH-13T (=KACC 19743T=CGMCC 1.13655T).