Required for spliced RNA export out of the nucleus (PubMed:23149939). May play a role in spliceosome assembly. ATP + H2O = ADP + H(+) + phosphate Interacts with rsr-1/SRm160. RNAi-mediated knockdown prevents germ cells from entering meiosis and results in the accumulation of unspliced mRNAs in the cytoplasm. Belongs to the DEAD box helicase family. DECD subfamily.