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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Related Experiment Video

Updated: Jun 5, 2025

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

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High-Throughput Quantification of miRNA-3'-Untranslated-Region Regulatory Effects.

Stephen Mastriano1,2, Shaveta Kanoria3, William Rennie3

  • 1Department of Genetics and Yale Stem Cell Center, Yale University, New Haven, CT 06520, USA.

Biorxiv : the Preprint Server for Biology
|December 16, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a high-throughput method to map microRNA (miRNA) targeting of 3' untranslated regions (UTRs), revealing that seedless sites significantly impact gene expression. The developed quantitative score accurately predicts miRNA regulatory effects, aiding in understanding gene regulation.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Bioinformatics

Background:

  • MicroRNAs (miRNAs) are key post-transcriptional regulators of gene expression.
  • Predicting miRNA binding sites and their regulatory impact on messenger RNAs (mRNAs) remains challenging.
  • Existing methods often struggle with high-throughput, reliable assessment of full-length 3' UTR regulation.

Purpose of the Study:

  • To develop a high-throughput reporter assay for assessing miRNA:3' UTR interactions.
  • To create a comprehensive experimental dataset of miRNA-mediated gene regulation.
  • To develop a quantitative score for predicting the total regulatory effect of miRNAs on 3' UTRs.

Main Methods:

  • Utilized a miniaturized, high-throughput reporter assay for pairwise miRNA:3' UTR analysis.
  • Generated a dataset of 4,994 regulatory outputs from 461 miRNAs and eleven 3' UTRs.
  • Developed a quantitative total score integrating seed and seedless miRNA binding site effects.

Main Results:

  • Established a large experimental miRNA:3' UTR dataset on a single platform.
  • Demonstrated that seedless miRNA binding sites can cause substantial gene downregulation.
  • Validated the quantitative score's ability to discriminate potent from weak miRNA inhibition.

Conclusions:

  • The developed methodology provides a robust platform for studying miRNA regulation.
  • The quantitative score enables accurate prediction of miRNA regulatory efficacy.
  • The findings and score are integrated into the STarMir program within the Sfold package.