Deubiquitinating enzyme that hydrolyzes 'Lys-27'-, 'Lys- 29'- and 'Lys-33'-linked polyubiquitin chains. Also able to hydrolyze 'Lys-11'-linked ubiquitin chains. . This is the function of Ensembl gene identifier ENSG00000189401 (OTUD6A, OTU deubiquitinase 6A).