Probable RNA helicase, which may be involved in modulation of the translation termination process. Probably unwinds double-stranded RNA. In vitro, unwinds covalently closed, circular DNA in the presence of a DNA topoisomerase TOP1 and replication factor-A protein RFA1. ATP + H2O = ADP + H(+) + phosphate Interacts with the peptidyl release factors SUP35 and weakly with SUP45. Associated with polyribosomes. Sensitivity to drugs that affect translation fidelity. Overexpression results in a nonsense suppression phenotype. Present with 736 molecules/cell in log phase SD medium. Belongs to the DNA2/NAM7 helicase family. ECM32 was originally identified as a DNA helicase and as component of DNA polymerase I.