Pseudokineococcus basanitobsidens sp. nov., isolated from volcanic rock.

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Extremophile Research

Background:

• Novel bacterial strains are frequently discovered in unique environmental niches.
• Volcanic rock environments harbor diverse microbial communities with unique adaptations.
• Accurate taxonomic classification is crucial for understanding bacterial diversity and function.

Purpose of the Study:

• To isolate and characterize a novel bacterial strain from volcanic rock.
• To determine the phylogenetic and taxonomic position of the novel isolate.
• To propose a new species within the genus Pseudokineococcus.

Main Methods:

• Isolation of bacteria from volcanic rock samples.
• Phylogenetic analysis using 16S rRNA gene sequences.
• Determination of chemotaxonomic properties (cell wall, quinones, fatty acids, polar lipids).
• DNA-DNA hybridization for genetic relatedness.

Main Results:

• A novel Gram-positive, non-spore-forming coccoid bacterium, strain SKC1-2^T, was isolated.
• Phylogenetic analysis showed close relation to Pseudokineococcus marinus and P. lusitanus.
• Distinct chemotaxonomic features and low DNA-DNA relatedness (<47%) supported novelty.
• The DNA G+C content was determined to be 74.9 mol%.

Conclusions:

• Strain SKC1-2^T represents a new species of the genus Pseudokineococcus.
• The proposed name for the new species is Pseudokineococcus basanitobsidens sp. nov.
• The type strain is SKC1-2^T (=DSM 103726^T=KCCM 43221^T).