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Related Experiment Video

Updated: Jun 18, 2026

High-throughput Identification of Gene Regulatory Sequences Using Next-generation Sequencing of Circular Chromosome Conformation Capture (4C-seq)
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Mining regulatory 5'UTRs from cDNA deep sequencing datasets.

Jonathan Livny1, Matthew K Waldor

  • 1The Broad Institute of MIT and Harvard, 7 Cambridge Center, Cambridge, MA 02142, USA. livny@broadinstitute.org

Nucleic Acids Research
|December 9, 2009
PubMed
Summary

Researchers developed a bioinformatic method to find novel regulatory 5' untranslated regions (r5'UTRs) in Vibrio cholerae. This approach successfully identified new r5'UTRs, expanding our understanding of gene regulation.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Bioinformatics

Background:

  • Regulatory 5' untranslated regions (r5'UTRs) control gene expression in bacteria and eukaryotes.
  • High-throughput sequencing generates vast RNA datasets, complicating the identification of novel r5'UTRs.
  • Distinguishing r5'UTRs from other RNA types in complex transcriptomic data is challenging.

Purpose of the Study:

  • To develop and implement a bioinformatic approach for identifying putative r5'UTRs from large RNA sequencing datasets.
  • To discover novel r5'UTRs in the small transcriptome of Vibrio cholerae.
  • To investigate the potential for r5'UTRs to regulate pathways not previously known to be under their control.

Main Methods:

  • Utilized pyrosequencing to generate a small RNA transcriptome dataset for Vibrio cholerae.

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  • Developed and applied a bioinformatic pipeline to screen this dataset for candidate r5'UTRs.
  • Experimentally validated novel candidate r5'UTRs using a GFP reporter assay.

    • Main Results:

    • The bioinformatic screen identified approximately 1% of non-overlapping RNAs as putative r5'UTRs.
    • The approach successfully recovered 75% of previously annotated r5'UTRs and identified 69 novel candidates in V. cholerae.
    • Candidate r5'UTRs were found upstream of genes in diverse pathways, including fatty acid oxidation and peptidoglycan catabolism.
    • Two novel r5'UTRs were experimentally validated, confirming their regulatory function.

    Conclusions:

    • The number and diversity of pathways regulated by r5'UTRs are likely underestimated.
    • Deep sequencing and advanced bioinformatic analysis are powerful tools for discovering novel r5'UTRs.
    • This study expands the known regulatory roles of r5'UTRs in V. cholerae and potentially other organisms.