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ePRINT: exonuclease assisted mapping of protein-RNA interactions.

Sophie Hawkins1,2, Alexandre Mondaini3, Seema C Namboori1,2

  • 1College of Medicine and Health, University of Exeter, Exeter, EX1 2LU, UK.

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ePRINT maps RNA-binding protein (RBP) interactions globally without protein purification. This new method identifies direct and indirect RNA targets and reveals RBPs active during cell fate changes like neuron differentiation.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Cell Biology

Background:

  • RNA-binding proteins (RBPs) are crucial regulators of RNA processing, affecting splicing, degradation, and localization.
  • Existing methods like CLIP (crosslinking immunoprecipitation) typically analyze one RBP at a time, limiting global network analysis.
  • Understanding RBP-RNA interactions is key to deciphering gene regulation and cellular processes.

Purpose of the Study:

  • To develop a novel method for large-scale mapping of RNA-binding protein (RBP)-RNA interactions.
  • To identify direct and indirect RNA targets of specific RBPs without individual protein purification.
  • To investigate RBP activation dynamics during cell fate transitions, such as neural differentiation.

Main Methods:

  • Developed ePRINT (enhanced Proteomic RNA Interaction Network Tracker), a method utilizing exoribonuclease XRN1.
  • ePRINT precisely maps the 5' end of RBP binding sites on RNA molecules.
  • The method enables global RBP-RNA interaction network analysis without purifying individual RBPs.

Main Results:

  • ePRINT successfully maps RBP-RNA interaction networks on a global scale.
  • The method identifies both direct and indirect RNA targets for a given RBP.
  • ePRINT revealed differentially activated RBPs during neural progenitor differentiation into neurons.

Conclusions:

  • ePRINT offers a powerful, unbiased approach to comprehensively map RBP-RNA interactions.
  • This method advances the study of RNA processing and gene regulation networks.
  • ePRINT provides insights into dynamic RBP activity during critical cellular transitions like cell differentiation.