Chelatococcus caeni sp. nov., isolated from a biofilm reactor sludge sample

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Alphaproteobacteria

Background:

• Biofilm reactors are crucial in various industrial and environmental processes.
• Understanding microbial diversity in biofilms is essential for optimizing their function.
• The genus Chelatococcus comprises bacteria with known roles in various environments.

Purpose of the Study:

• To taxonomically characterize a novel bacterial strain, EBR-4-1(T), isolated from a biofilm reactor.
• To determine the phylogenetic and genotypic relationship of strain EBR-4-1(T) to existing species.
• To formally propose a new species within the genus Chelatococcus.

Main Methods:

• Polyphasic taxonomic analysis including 16S rRNA gene sequencing.
• Genomic DNA G+C content determination.
• Phenotypic characterization and chemotaxonomic analysis (fatty acid profiles, ubiquinone content).

Main Results:

• Strain EBR-4-1(T) exhibited Gram-negative, motile, rod-shaped characteristics.
• 16S rRNA gene sequence similarity to Chelatococcus daeguensis and Chelatococcus sambhunathii was high (98.8% and 98.7%).
• Genomic G+C content was 68.7 mol%, and chemotaxonomic data supported placement within the genus Chelatococcus.

Conclusions:

• Strain EBR-4-1(T) represents a novel species, proposed as Chelatococcus caeni sp. nov.
• The findings expand the taxonomic and phylogenetic understanding of the Chelatococcus genus.
• This research contributes to the characterization of microbial communities in biofilm systems.