ATP-binding RNA helicase involved in the biogenesis of 60S ribosomal subunits. ATP + H2O = ADP + H(+) + phosphate Expressed in the germline tissue of the ovary. The Q motif is unique to and characteristic of the DEAD box family of RNA helicases and controls ATP binding and hydrolysis. Belongs to the DEAD box helicase family. DDX51/DBP6 subfamily.