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Danino YM, Molitor L, Rosenbaum-Cohen T, Kaiser S, Cohen Y, Porat Z, Marmor-Kollet H, Katina C, Savidor A, Rotkopf R, Ben-Isaac E, Golani O, Levin Y, Monchaud D, Hickson I, Hornstein E. BLM helicase protein negatively regulates stress granule formation through unwinding RNA G-quadruplex structures. Nucleic Acids Res 2023; 51:9369-9384. [PMID: 37503837 PMCID: PMC10516661 DOI: 10.1093/nar/gkad613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/20/2023] [Accepted: 07/26/2023] [Indexed: 07/29/2023] Open
Abstract
Bloom's syndrome (BLM) protein is a known nuclear helicase that is able to unwind DNA secondary structures such as G-quadruplexes (G4s). However, its role in the regulation of cytoplasmic processes that involve RNA G-quadruplexes (rG4s) has not been previously studied. Here, we demonstrate that BLM is recruited to stress granules (SGs), which are cytoplasmic biomolecular condensates composed of RNAs and RNA-binding proteins. BLM is enriched in SGs upon different stress conditions and in an rG4-dependent manner. Also, we show that BLM unwinds rG4s and acts as a negative regulator of SG formation. Altogether, our data expand the cellular activity of BLM and shed light on the function that helicases play in the dynamics of biomolecular condensates.
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Affiliation(s)
- Yehuda M Danino
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lena Molitor
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Tamar Rosenbaum-Cohen
- Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
- Department of Brain science, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Sebastian Kaiser
- Center for Chromosome Stability, Dept. of Cellular and Molecular Medicine, Panum Institute, Copenhagen Univ, 2200 København N., Denmark
| | - Yahel Cohen
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ziv Porat
- Flow Cytometry Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Hagai Marmor-Kollet
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
- 1E therapeutics, Rehovot, Israel
| | - Corine Katina
- de Botton Institute for Protein Profiling, The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Alon Savidor
- de Botton Institute for Protein Profiling, The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ron Rotkopf
- Bioinformatics Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Eyal Ben-Isaac
- MICC Cell Observatory Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ofra Golani
- MICC Cell Observatory Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Yishai Levin
- de Botton Institute for Protein Profiling, The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - David Monchaud
- Institut de Chimie Moleculaire, ICMUB CNRS UMR 6302, uB Dijon, France
| | - Ian D Hickson
- Center for Chromosome Stability, Dept. of Cellular and Molecular Medicine, Panum Institute, Copenhagen Univ, 2200 København N., Denmark
| | - Eran Hornstein
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel
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