Predicted to enable cysteine-type deubiquitinase activity; tRNA (adenine(58)-N1)-methyltransferase activity; and zinc ion binding activity. Predicted to be involved in multivesicular body sorting pathway; protein deubiquitination; and tRNA methylation. Predicted to be part of ESCRT II complex and tRNA (m1A) methyltransferase complex. Is an ortholog of C. elegans W02A11.1.