Predicted to enable threonine-type endopeptidase activity. Acts upstream of or within T cell proliferation and cell morphogenesis. Part of proteasome core complex and spermatoproteasome complex. Is expressed in several structures, including adrenal gland; cerebral cortex; genitourinary system; hemolymphoid system; and liver. Orthologous to human PSMB10 (proteasome 20S subunit beta 10). [provided by Alliance of Genome Resources, Apr 2022]