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Published on: April 26, 2017
Nano-Mod-Amp reveals RNA sequence, structural and cell type specific features of pseudouridylation by PUS7
Rebecca Rodell1, Ronit Jain1, Hossein Shenasa1
1Department of Chemical and Systems, Stanford University, Stanford, CA 94305.
Biorxiv : the Preprint Server for Biology
|November 24, 2025
Summary
Researchers developed Nanopore sequencing tools to study pseudouridine modifications by PUS7, revealing RNA structural signatures and new regulatory mechanisms for gene expression control.
Area of Science:
- Molecular Biology
- Epigenetics
- RNA Biology
Background:
- Pseudouridines are abundant mRNA modifications influencing gene expression.
- PUS7 is a key pseudouridine synthase, and its dysregulation is linked to neurodevelopmental disorders and cancer.
- Understanding PUS7's mechanisms is crucial but limited by detection methods.
Purpose of the Study:
- To develop novel Nanopore sequencing tools for high-throughput pseudouridine detection.
- To investigate the molecular mechanisms of PUS7-mediated pseudouridylation.
- To uncover PUS7 regulatory features and their impact on gene expression.
Main Methods:
- Development of Nanopore sequencing tools, including Nano-Mod-Amp.
- Analysis of pseudouridine stoichiometry and RNA structural context.
- Interrogation of PUS7 dependence on protein levels and cell-type specific regulation.
Main Results:
- Identification of a novel RNA structural signature enhancing PUS7 modification efficiency.
- Demonstration that pseudouridines are responsive to PUS7 protein level modulation.
- Discovery of cell-type specific PUS7 regulation independent of expression levels, involving RNA structure and binding proteins.
Conclusions:
- Novel Nanopore tools enable detailed study of pseudouridylation.
- PUS7 activity is regulated by RNA structure and protein levels.
- A framework for studying epitranscriptome regulation by RNA-modifying enzymes was established.
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