Predicted to enable ubiquitin-like protein ligase activity. Predicted to act upstream of or within several processes, including glutamatergic synaptic transmission; regulation of peptidyl-tyrosine phosphorylation; and visual learning. Predicted to be located in cell surface; postsynapse; and presynaptic active zone. Orthologous to human ZZEF1 (zinc finger ZZ-type and EF-hand domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]