Related Experiment Video

Updated: Jul 2, 2026

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells
07:19

Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells

Published on: September 28, 2011

Site-specific crosslinking of human microRNPs to RNA targets

Yohei Kirino1, Zissimos Mourelatos

  • 1Division of Neuropathology, Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.

RNA (New York, N.Y.)
|August 23, 2008
PubMed

Insights

MicroRNAs (miRNAs) guide protein complexes to target messenger RNAs. Researchers adapted a crosslinking method to find that only Ago proteins bind to these sites in a miRNA-dependent way.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression.
  • Dysregulation of miRNAs is linked to various human diseases.
  • miRNAs direct microprotein complexes (miRNPs) to specific sites on messenger RNA (mRNA) targets, known as miRNA recognition elements (MREs).

Purpose of the Study:

  • To identify protein factors that physically associate with MREs in human cells.
  • To understand the role of these proteins in miRNA-mediated gene regulation.

Main Methods:

  • Adaptation of a site-specific crosslinking approach, originally used for splicing analysis.
  • Interrogation of protein factors binding to MREs in human cells.

Main Results:

  • Ago proteins were identified as the sole proteins binding to MREs.
  • This binding is dependent on the presence of miRNA.
  • The study provides a method to analyze MRE-bound complexes.

Conclusions:

  • Ago proteins are the primary interactors with MREs in a miRNA-dependent manner.
  • The developed crosslinking method is a valuable tool for studying miRNA-target interactions.
  • This research deepens the understanding of miRNA-mediated gene regulation mechanisms.

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