This domain is found in Cdc13 proteins in several Candida species. The Cdc13-Stn1-Ten1 complex is crucial for telomere protection. This domain is the C-terminal OB4 domain and is responsible for dimerization. Dimerization of Cdc13 is important for high-affinity DNA binding [1].

1: Analyses of Candida Cdc13 orthologues revealed a novel OB fold dimer arrangement, dimerization-assisted DNA binding, and substantial structural differences between Cdc13 and RPA70. Yu EY, Sun J, Lei M, Lue NF; Mol Cell Biol. 2012;32:186-198. PMID:22025677