Enables diphosphomevalonate decarboxylase activity. Involved in isopentenyl diphosphate biosynthetic process, mevalonate pathway and response to xenobiotic stimulus. Located in cytosol and peroxisomal matrix. Human ortholog(s) of this gene implicated in porokeratosis. Orthologous to human MVD (mevalonate diphosphate decarboxylase). [provided by Alliance of Genome Resources, Apr 2022]