The cytoskeleton is essential for cell organisation and movement, with actin filaments in eukaryotes and actin-like proteins in bacteria playing key roles. This study identifies a novel bacterial actin family in the Verrucomicrobiota phylum, forming unique three-stranded tubular filaments in the presence of ATP. These findings provide new insights into actin filament diversity and bacterial cytoskeletal evolution.

A family of bacterial actin homologues forms a 3-stranded tubular structure | bioRxiv