ArticleCell reports2025
Structural basis for dual DNA and RNA specificity of the G-quadruplex-resolving DEAH-box helicase DHX36.
Article in Cell reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- G-quadruplex structures as regulators of cellular processes and drivers of genome instability in cancer.Critical reviews in biochemistry and molecular biology · 2026Review
- G-Quadruplexes: Structural Diversity and Emerging Roles in Biomolecular Condensation.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Review
- Extreme Kinetic Stability and RNase Resistance of Human Telomerase RNA G-Quadruplexes Overcome by DHX36 Helicase.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- G-Quadruplex Unwinding Molecular Mechanisms by Helicases and Their Applications.International journal of molecular sciences · 2026Review
- Non-B DNA structures and their contributions to genetic diversity, aging, and disease.Nucleic acids research · 2026Review
- ProNA3D: Distance-Based Analysis of Nucleic Acid-Containing Interfaces.Computational and structural biotechnology journal · 2026Article
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
DEAH-box helicases, which share a structurally conserved ATPase core, function in all facets of eukaryotic gene expression. While most helicases are highly specialized for their substrates, DHX36 (DEAH-box helicase 36) resolves both DNA and RNA G-quadruplexes. To elucidate the molecular basis of this versatility, we have determined cryo-electron microscopy structures of bovine DHX36 bound to a three-tier RNA G-quadruplex and a six-tier DNA G-quadruplex at 2.6 and 3.4 Å resolution, respectively. Kinetic and smFRET characterizations of structure-guided mutants indicate a key role for the RecA2 domain of the helicase core in DNA vs. RNA discrimination. Furthermore, our structures show that a sequence-divergent RecA2 domain surface loop synergizes with a DHX36-specific N-terminal extension to orthogonally recognize features that specify G-quadruplexes over other nucleic acid structures. Our analysis suggests that recognizing their folded substrates by DEAH-box helicases may generally involve ornamentations of their structural cores acting synergistically with specialized peripheral elements.
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Registered trials
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