Abstract
DEAD box RNA helicases are a versatile group of ATP dependent enzymes that play an essential role in cellular processes like transcription, RNA processing, ribosome biogenesis and translation. These enzymes perform structural rearrangement of complex RNA molecules and enhance the productive folding of RNA and organization of macromolecular complexes. In this review article besides providing the outline about structural organization of helicases, an in-depth discussion will be done on the biochemical properties of RNA helicases like their substrate binding, binding and hydrolysis of ATP and related conformational changes that are important for functioning of the RNA helicase enzymes. I will extensively discuss the physiological role of RNA helicases in RNA processing and ribosome biogenesis.
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