TadZ_N is the N-terminal region of the Flp pilus assembly protein TadZ, which carries an AAA, ATPase domain immediately downstream, AAA_31, Pfam:PF13614. The domain is an example of a signal-transduction-response receiver. It is localised to the cytoplasmic side of the inner bacterial cell-membrane, contacting also with both tadA and RcpC.

1: The tad locus: postcards from the widespread colonization island. Tomich M, Planet PJ, Figurski DH; Nat Rev Microbiol. 2007;5:363-375. PMID:17435791