This is the C-terminal domain found in centromere-binding protein ParB, which is used for stable segregation. The C-terminal domain has a ribbon-helix helix (RHH) motif with a C-terminal loop (residues 119-128) following helix alpha-2. The domain forms a dimer with the C-terminal of the beta chain. The function of the C-terminal domain is to bind to DNA [1].

1: Crystal structure and centromere binding of the plasmid segregation protein ParB from pCXC100. Huang L, Yin P, Zhu X, Zhang Y, Ye K; Nucleic Acids Res. 2011;39:2954-2968. PMID:21123191