Enables deubiquitinase activity and ubiquitin protein ligase binding activity. Involved in neuron migration and protein deubiquitination involved in ubiquitin-dependent protein catabolic process. Acts upstream of or within several processes, including cellular response to transforming growth factor beta stimulus; in utero embryonic development; and nervous system development. Located in apical part of cell and cytoplasm. Is expressed in several structures, including central nervous system; eye; limb interdigital region; lung; and reproductive system. Human ortholog(s) of this gene implicated in female-restricted syndromic X-linked intellectual disability 99 and non-syndromic X-linked intellectual disability 99. Orthologous to human USP9X (ubiquitin specific peptidase 9 X-linked). [provided by Alliance of Genome Resources, Apr 2022]