Predicted to enable ubiquitin protein ligase activity and zinc ion binding activity. Involved in behavioral response to ethanol and long-term memory. Predicted to be located in nucleus. Is expressed in anterior midgut primordium; embryonic/larval midgut; larval ventral nerve cord; organism; and posterior midgut primordium. Orthologous to human RNF38 (ring finger protein 38) and RNF44 (ring finger protein 44).