Analysis of cofactor effects on RNA helicases
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Updated: May 21, 2026

Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events
Published on: May 13, 2019
Crystal Young1, Katrin Karbstein
1Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA.
Abstract:
RNA helicases are involved in all aspects of RNA metabolism. Since the helicase core is conserved between all helicases, specificity for particular cellular roles must arise from interactions with specific cofactors, which can regulate RNA binding and enzymatic activity. While recent structural studies have provided invaluable insight into some mechanisms of cofactor effects on RNA helicases, biochemical experiments must ultimately be conducted in order to validate these predictions. Here, we provide a guide for identifying helicase-specific cofactors and then studying their effects on helicase function. By measuring RNA binding and release, ATPase activity, nucleotide affinity, and unwinding and annealing activities, cofactor effects on an RNA helicase can be fully characterized.
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