This domain is found on the N-terminal region of uncharacterized proteins. It shows homology to other PIN-like families and contains several acidic residues critical for chelating metal ions that are conserved in other PIN-like domains [1].

1: Comprehensive classification of the PIN domain-like superfamily. Matelska D, Steczkiewicz K, Ginalski K; Nucleic Acids Res. 2017;45:6995-7020. PMID:28575517