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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...
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MicroRNAs01:22

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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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MicroRNAs01:22

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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
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RNA Interference01:23

RNA Interference

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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Related Experiment Video

Updated: Mar 13, 2026

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
09:06

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method

Published on: October 7, 2025

478

Preview. MicroRNAs: from decay to decoy.

Michaela Beitzinger1, Gunter Meister

  • 1Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.

Cell
|March 10, 2010
PubMed
Summary

MicroRNAs regulate gene expression. A new study reveals microRNA-328 also acts as a decoy, binding to hnRNP E2 to enhance myeloid cell differentiation.

Area of Science:

  • Molecular Biology
  • Gene Regulation

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression, primarily acting through Argonaute proteins to mediate posttranscriptional gene silencing.
  • Understanding the diverse roles of miRNAs beyond direct silencing is crucial for comprehending complex cellular processes.

Discussion:

  • This study uncovers a novel, dual function for microRNA-328 (miR-328).
  • miR-328 functions not only in gene silencing but also as a molecular decoy, sequestering heterogeneous nuclear ribonucleoprotein E2 (hnRNP E2).
  • This sequestration releases the translational repression of a specific messenger RNA (mRNA) essential for myeloid cell differentiation.

Key Insights:

  • miR-328 directly interacts with hnRNP E2, a protein known to repress mRNA translation.
  • By binding hnRNP E2, miR-328 effectively releases the translational block on a target mRNA.

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  • This mechanism promotes myeloid cell differentiation, highlighting a new layer of gene regulation.

    • Outlook:

    • Further investigation into miRNA decoy functions could reveal new therapeutic targets.
    • Exploring similar decoy mechanisms for other miRNAs may uncover broader regulatory networks.
    • This finding opens avenues for understanding and manipulating myeloid differentiation pathways.