Page "Flagellum" Paragraph 24

The archaeal flagellum ( Archaellum ) is superficially similar to the bacterial ( or eubacterial ) flagellum ; in the 1980s they were thought to be homologous on the basis of gross morphology and behavior.

Both flagella and archaella consist of filaments extending outside the cell, and rotate to propel the cell.

Archaella flagella have a unique structure which lacks a central channel.

Similar to bacterial type IV pilins, the archaeal flagellins are made with class 3 signal peptides and they are processed by a type IV prepilin peptidase-like enzyme.

The archaellins are typically modified by the addition of N-linked glycans which are necessary for proper assembly and / or function.