This entry represents a C-terminal helical domain hairpin found in some relaxase enzymes. Proteins found related to this domain have been previously misannotated as a lantibiotic immunity protein SrtI [1].

1: The bacteriocin from the prophylactic candidate Streptococcus suis 90-1330 is widely distributed across S. suis isolates and appears encoded in an integrative and conjugative element. Sun Y, Veseli IA, Vaillancourt K, Frenette M, Grenier D, Pombert JF; PLoS One. 2019;14:e0216002. PMID:31039174