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Related Experiment Videos

Response to Comment on "microRNAs in the Same Clusters Evolve to Coordinately Regulate Functionally Related Genes".

Yirong Wang1, Hong Zhang1, Jian Lu1

  • 1State Key Laboratory of Protein and Plant Gene Research, Center for Bioinformatics, School of Life Sciences, Peking University, Beijing, China.

Molecular Biology and Evolution
|May 18, 2019
PubMed
Summary

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Clustered microRNAs (miRNAs) aid new gene evolution. This study refutes criticisms of the functional co-adaptation model, reaffirming that miRNA clustering promotes functional development and survival.

Area of Science:

  • Genetics
  • Evolutionary Biology
  • Molecular Biology

Background:

  • Metazoan microRNAs (miRNAs) are frequently found in genomic clusters.
  • A prior study proposed a "functional co-adaptation" model suggesting clustered miRNAs co-evolve for functional synergy.
  • Recent re-analysis challenged this model, questioning statistical significance and seed sequence influence.

Purpose of the Study:

  • To statistically re-evaluate the significance of clustered miRNAs targeting common genes.
  • To address criticisms regarding the methodology used to support the functional co-adaptation model.
  • To provide new evidence reinforcing the proposed model of miRNA clustering and co-evolution.

Main Methods:

  • Statistical analysis of miRNA-target interactions within genomic clusters.
Keywords:
clusteringfunctional co-adaptionmiRNA

Related Experiment Videos

  • Re-analysis of existing data to address concerns about P-values and seed sequence bias.
  • Comparative analysis of clustered vs. non-clustered miRNA targeting patterns.

    • Main Results:

    • The number of genes targeted by multiple conserved miRNAs from the same cluster is statistically significant.
    • Criticisms regarding P-value inflation due to shuffling methods were found to be based on inappropriate analysis.
    • The influence of similar seed sequences does not fully explain the observed over-representation of common targets for clustered miRNAs.

    Conclusions:

    • The functional co-adaptation model for miRNA clustering remains valid.
    • Clustered miRNAs exhibit a statistically significant tendency to co-target genes, supporting coordinated evolution.
    • The study reaffirms that miRNA clustering plays a crucial role in the evolutionary development of new miRNA functions.