Predicted to enable RNA helicase activity; chromatin binding activity; and nucleic acid binding activity. Acts upstream of or within dosage compensation by inactivation of X chromosome. Predicted to be located in chromatin; chromosome, telomeric region; and nucleoplasm. Predicted to be part of exon-exon junction complex and supraspliceosomal complex. Predicted to be active in cytoplasm. Is expressed in cerebral cortex ventricular layer; embryo; and oocyte. Orthologous to human UPF1 (UPF1 RNA helicase and ATPase). [provided by Alliance of Genome Resources, Apr 2022]