DEAD-box RNA helicase. Probably has an RNA-dependent ATPase activity and a 3' to 5' RNA helicase activity that uses the energy of ATP hydrolysis to destabilize and unwind short RNA duplexes. ATP + H2O = ADP + H(+) + phosphate Induced at 10 degrees Celsius. Longer lag phase at 20 degrees Celsius, wild-type growth rate at 30 degrees Celsius, no growth at 10 degrees Celsius. At 12 degrees Celsius cells were short and stocky, by transmission electron microscopy the cytoplasm appears empty although cells are viable. Decreased growth in the presence of H(2)O(2) and diamide.