This is the C-terminal domain found in PriA DNA helicase, a multifunctional enzyme that mediates the process of restarting prematurely terminated DNA replication reactions in bacteria. The C-terminal domain (CTD) bears similarity to the S10 subunit which binds branched rRNA within the bacterial ribosome. The C-terminal domain is part of the helicase domain of PriA proteins. It acts together with the 3' DNA-binding domain to form a site for binding ssDNA-binding protein (SSB) [1].

1: Structural mechanisms of PriA-mediated DNA replication restart. Bhattacharyya B, George NP, Thurmes TM, Zhou R, Jani N, Wessel SR, Sandler SJ, Ha T, Keck JL; Proc Natl Acad Sci U S A. 2014;111:1373-1378. PMID:24379377