Flagellin

Flagellin is the protein that makes up the filament of bacterial flagella, the tail-like structures bacteria use to move. It forms a long, whip-like appendage that rotates to propel the bacteria through liquids. Flagellin molecules are arranged in a helical pattern, creating a sturdy, flexible filament. This structure not only enables mobility but also plays a role in how bacteria interact with their environments and hosts, sometimes triggering immune responses in humans. Understanding flagellin helps researchers develop ways to detect, prevent, or treat bacterial infections.