This domain is found at the C-terminal end of the subunit tau of bacterial DNA polymerase III (DnaX). It binds to the C terminus of the alpha subunit of the same complex through its C-terminal helix and the adjacent loop [1].

1: Structure of the PolIIIalpha-tauc-DNA complex suggests an atomic model of the replisome. Liu B, Lin J, Steitz TA; Structure. 2013;21:658-664. PMID:23478062