This family of proteins has a conserved HEXXH motif, suggesting they are putative peptidases of zincin fold [1]. The structure of this family has similarity to Peptidase_M1 (Pfam:PF01433, PDB:3CMN).

1: CLCAs - A Family of Metalloproteases of Intriguing Phylogenetic Distribution and with Cases of Substituted Catalytic Sites. Lenart A, Dudkiewicz M, Grynberg M, Pawlowski K; PLoS One. 2013;8:e62272. PMID:23671590