Enables ADP-ribosylserine hydrolase activity and poly(ADP-ribose) glycohydrolase activity. Involved in peptidyl-serine ADP-deribosylation. Acts upstream of or within cellular response to superoxide. Located in mitochondrion and nucleus. Human ortholog(s) of this gene implicated in stress-induced childhood-onset neurodegeneration with variable ataxia and seizures. Orthologous to human ADPRS (ADP-ribosylserine hydrolase). [provided by Alliance of Genome Resources, Apr 2022]