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Related Experiment Videos

Translationally repressive RNA structures monitored in vivo using temperate DNA bacteriophages

D E Fouts1, D W Celander

  • 1Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.

Gene
|May 23, 1998
PubMed
Summary

This study introduces RNA challenge phages for selecting RNA-binding proteins in bacteria. It demonstrates their use in studying RNA folding and interactions in vivo.

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Area of Science:

  • Bacteriophage genetics
  • Molecular biology
  • RNA-protein interactions

Background:

  • The RNA challenge phage system, a modification of bacteriophage P22, uses post-transcriptional regulation to control phage development.
  • The system was initially designed to identify novel RNA ligands and suppressor proteins.
  • Previous applications focused on R17/MS2 coat protein interactions.

Purpose of the Study:

  • To evaluate the HIV-1 Rev protein's ability to direct lysogen development in bacteriophages encoding Rev response element (RRE) RNA.
  • To identify novel RNA ligands that interact with RRE sequences within the phage system.
  • To investigate the in vivo impact of RNA secondary structure on phage development.

Main Methods:

  • Genetic engineering of bacteriophage P22 to incorporate RRE RNA sequences.

Related Experiment Videos

  • Selection of phage derivatives based on developmental outcomes (lytic vs. lysogenic).
  • Analysis of RRE RNA structure and its effect on phage gene expression.

    • Main Results:

    • Two RRE RNA ligands were identified that inhibit challenge phage development.
    • RRE RNA secondary structure was found to prevent Ant protein biosynthesis and lytic development.
    • Phage lysogen formation was efficient and independent of Rev protein expression or competing RRE RNAs.

    Conclusions:

    • RNA challenge phages can be utilized to study in vivo RNA folding and structural interactions.
    • The system provides a novel platform for investigating RNA-mediated regulation in a bacterial context.
    • This work expands the application of phage display systems to RNA structural biology.