In this video, we're going to begin our lesson on Prokaryotic Flagellar Structure. A Prokaryotic Flagellum consists of three parts that we have numbered down below: 1, 2, and 3. These numbers in the text correspond with the numbers in our image. It's important to keep this in mind as we go through this video. The first structural component of a prokaryotic flagella is the filament. The filament is the primary component of the flagellum and is made of the globular protein called flagellin.
If you take a look at the image down below for number 1, the filament, notice that the filament is this blue structure that you see right here. It's the primary component of the flagella, made of the globular protein flagellin. The second structural component of a prokaryotic flagella is the hook. The hook is a flexible, curved protein that connects the filament to the basal body, which is the third component down below here. If we take a look at the image down below, you'll see the hook in green.
The hook's main responsibility is to connect the filament to the basal body, which is the third component over here. Moving on to the third part, we have the basal body. The basal body consists of this rod that you see here along with these protein rings. The basal body is the component that will be embedded in the membranes of the cell envelope by a series of protein rings.
Taking another look at the basal body that's here, it consists of a rod that will directly attach to the hook and these protein rings. The basal body has the rod and the protein rings, as you can see by the bracket here. This is the typical structure for a prokaryotic flagella. I'll see you all in our next video.