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Updated: Apr 14, 2026

iCLIP - Transcriptome-wide Mapping of Protein-RNA Interactions with Individual Nucleotide Resolution
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Mapping RNA interactions to proteins in virions using CLIP-Seq.

Baochang Fan1, Peng Ni, C Cheng Kao

  • 1Department of Molecular and Cellular Biochemistry, Indiana University, 212 S. Hawthorne St., 201A Simon Hall, Bloomington, IN, 47405, USA.

Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2015
PubMed
Summary

Researchers optimized cross-linking immunoprecipitation sequencing (CLIP-Seq) to map protein-RNA interactions. This method revealed specific viral RNA regions binding to the capsid, applicable to other RNA-protein complexes.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Nanotechnology

Background:

  • Protein-RNA interactions are crucial in RNA nanotechnology.
  • Understanding these contacts is essential for designing RNA-protein complexes.
  • The cross-linking immunoprecipitation, and DNA sequencing (CLIP-Seq) protocol is a key method for studying these interactions.

Purpose of the Study:

  • To optimize CLIP-Seq procedures for mapping RNA-protein interactions.
  • To investigate the specific binding sites between viral RNA and its capsid protein.
  • To assess the applicability of the optimized protocol for other RNA-protein systems.

Main Methods:

  • Optimization of RNA fragmentation, immunoprecipitation, and library construction steps within the CLIP-Seq protocol.
  • Application of the optimized CLIP-Seq protocol to a simple positive-strand RNA virus.
  • Analysis of sequencing data to identify RNA regions interacting with the viral capsid.

Main Results:

  • Distinct regions of the viral RNA were identified as interacting with the capsid.
  • The optimized CLIP-Seq protocol successfully mapped these specific RNA-protein contacts.
  • The protocol demonstrated effectiveness in characterizing RNA-protein binding sites.

Conclusions:

  • The optimized CLIP-Seq protocol provides a robust method for mapping RNA-protein interactions.
  • Specific viral RNA segments directly contact the viral capsid.
  • This refined protocol is adaptable for studying RNA-protein interactions in various systems, including RNA virions and nanoparticles.