Predicted to enable CD4 receptor binding activity. Predicted to be located in intracellular membrane-bounded organelle. Predicted to be active in cytosol and trans-Golgi network transport vesicle. Human ortholog(s) of this gene implicated in Mast syndrome and hereditary spastic paraplegia. Orthologous to human SPG21 (SPG21 abhydrolase domain containing, maspardin). [provided by Alliance of Genome Resources, Apr 2022]