Isolation and cultivation of a novel freshwater magnetotactic coccus FCR-1 containing unchained magnetosomes.

ABSTRACT: Magnetotactic bacteria are ubiquitous aquatic prokaryotes that have the ability to biomineralize magnetite (Fe₃O₄) and/or greigite (Fe₃S₄) nanoparticles called magnetosomes. Magnetotactic cocci belonging to the class "Ca. Magnetococcia" are most frequently identified in freshwater habitats, but remain uncultivated. Here, we report for the first time axenic cultivation of freshwater magnetotactic coccus FCR-1 isolated from Chichijima, Japan. Strain FCR-1 grows microaerophilically in a semi-solid gellan gum medium. We find that strain FCR-1 biomineralizes Fe₃O₄ nanoparticles, which are not chained, into a cell. Based on phylogenomic analysis, compared with strains of the class "Ca. Magnetococcia", strain FCR-1 represents a nov

SUBMITTER: Shimoshige H 

PROVIDER: S-EPMC11950176 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature