This domain family is found in bacteria, and is approximately 110 amino acids in length. The family is found in association with Pfam:PF00004. Domains I-III are shared between the tau and the gamma subunits, while most of the DnaB-binding Domain IV and all of the alpha-interacting Domain V are unique to tau.

1: The unstructured C-terminus of the tau subunit of Escherichia coli DNA polymerase III holoenzyme is the site of interaction with the alpha subunit. Jergic S, Ozawa K, Williams NK, Su XC, Scott DD, Hamdan SM, Crowther JA, Otting G, Dixon NE; Nucleic Acids Res. 2007;35:2813-2824. PMID:17355988