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Chromatin Structure Regulates pre-mRNA Processing02:41

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Related Experiment Video

Updated: Jan 20, 2026

Spectrophotometric Assay to Determine Glycogen Synthase Activity
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mRNA structure determines modification by pseudouridine synthase 1.

Thomas M Carlile1,2, Nicole M Martinez3, Cassandra Schaening1

  • 1Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA.

Nature Chemical Biology
|September 4, 2019
PubMed
Summary
This summary is machine-generated.

Pseudouridine (Ψ) modifies mRNA, affecting gene expression. Researchers discovered a specific RNA structure recognized by the Pus1 enzyme, enabling targeted pseudouridylation and revealing how this modification is regulated.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Pseudouridine (Ψ) is a crucial RNA modification impacting gene expression by altering RNA interactions.
  • While mRNA pseudouridylation is widespread, the mechanisms governing its sequence-specific regulation remained unclear.

Purpose of the Study:

  • To identify mRNA targets of pseudouridine synthases.
  • To elucidate the determinants of mRNA target recognition by the Pus1 enzyme.
  • To understand the structural basis for regulated mRNA pseudouridylation.

Main Methods:

  • Developed high-throughput kinetic analysis for in vitro pseudouridylation studies.
  • Employed computational prediction and rational mutational analysis.
  • Validated predicted mRNA targets in vivo.

Main Results:

  • Identified specific mRNA targets for five pseudouridine synthases.
  • Discovered an essential RNA structural motif required for Pus1-mediated pseudouridylation.
  • Predicted and confirmed hundreds of additional in vivo mRNA targets based on structural context.

Conclusions:

  • mRNA target recognition by Pus1 is dependent on a specific RNA structural motif.
  • Modulation of RNA structure is a likely mechanism for regulating mRNA pseudouridylation.
  • This study provides a framework for understanding sequence-specific mRNA modification.