Flagellins polymerise to form bacterial flagella. There is some similarity between this family and Pfam:PF00669, particularly the motif NRFXSXIXXL. It has been suggested that these two regions associate [2] and this is shown to be correct as structurally this family forms an extended helix that interacts with Pfam:PF00700.

1: Spinning tails. DeRosier DJ; Curr Opin Struct Biol 1995;5:187-193. PMID:7648320

2: Flagellin as an object for supramolecular engineering. Fedorov OV, Efimov AV; Protein Eng 1990;3:411-413. PMID:2190210