Establishment of a Primary Screening Assay for the DHX9 Helicase

Author(s): Regina Cencic, Patrick Senechal, Jerry Pelletier

Journal Name: Combinatorial Chemistry & High Throughput Screening
Accelerated Technologies for Biotechnology, Bioassays, Medicinal Chemistry and Natural Products Research

Volume 18 , Issue 9 , 2015

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Abstract:

The RNA helicase DHX9 is an ATP-dependent DExH box helicase that can unwind DNA and RNA. Much evidence has implicated DHX9 at multiple levels of gene expression regulation ranging from genome stability and replication, to transcriptional control and translation regulation. Its association with the EWS-FLI1 fusion product, as well as the finding that its suppression can be synthetic lethal with the BCL-2 family inhibitor ABT-737 indicates a potential role in tumor maintenance. Hence, to identify small molecules that could interfere with its activity, we developed a homogenous RNA-dependent ATPase assay. We show that aurintricarboxylic acid, a promiscuous protein-nucleic acid inhibitor prevents DHX9-mediated hydrolysis demonstrating that the assay is also capable of detecting compounds that impinge on DHX9:RNA association.

Keywords: ATPase assay, ATA, aurintricarboxylic acid, DHX9, HTS, RNA binding, RNA helicase.

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Article Details

VOLUME: 18
ISSUE: 9
Year: 2015
Page: [855 - 861]
Pages: 7
DOI: 10.2174/1386207318666151019093433
Price: $65

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