Acts upstream of or within double-strand break repair via homologous recombination. Predicted to be located in nucleus. Predicted to be part of integrator complex and proteasome complex. Is expressed in several structures, including alimentary system; brain; genitourinary system; respiratory system; and sensory organ. Orthologous to human SEM1 (SEM1 26S proteasome subunit). [provided by Alliance of Genome Resources, Apr 2022]