Enables thiol-dependent deubiquitinase and ubiquitin binding activity. Involved in cellular response to xenobiotic stimulus. Acts upstream of or within several processes, including adult walking behavior; axon target recognition; and response to ischemia. Located in several cellular components, including axon; neuron projection terminus; and neuronal cell body. Is expressed in several structures, including alimentary system; cardiovascular system; genitourinary system; nervous system; and sensory organ. Human ortholog(s) of this gene implicated in Alzheimer's disease; Parkinson's disease; and hereditary spastic paraplegia. Orthologous to human UCHL1 (ubiquitin C-terminal hydrolase L1). [provided by Alliance of Genome Resources, Apr 2022]