This domain is found in mammalian proteins. There are a number of conserved cysteines but it is unlikely to be a zinc-finger family. This entry includes PATE4 from mice. According to structure predictions (AlphaFold models and DALI server), this domain is structurally similar to members of the uPar/Lys6 domain superfamily.
Jiyao W et al.(2023). "The conserved domain database in 2023.",