Monomer. The N-terminal and the C-terminal half of the protein have a very similar 3D-structure, suggesting they arose from duplication (PubMed:30280012). Requires a bound zinc ion for normal folding and solubility (PubMed:30260988). Belongs to the UPF0587 family. Was identified as interaction partner for CCS (PubMed:30260988). Only misfolded mutant protein forms that lack part of the zinc-binding sites interact with CCS. The full-length protein does not interact with CCS. Likewise, mutant protein that lacks all four zinc-binding residues does not interact with CCS (PubMed:30260988).