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Assessment of External Guide Sequences’ (EGS) Efficiency as Inducers of RNase P-Mediated Cleavage of mRNA Target Molecules

  • Saumya Jani
  • Alexis Jackson
  • Carol Davies-Sala
  • Kevin Chiem
  • Alfonso Soler-Bistué
  • Angeles Zorreguieta
  • Marcelo E. TolmaskyEmail author
Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 1737)

Abstract

RNase P is a ribozyme consisting of a catalytic RNA molecule and, depending on the organism, one or more cofactor proteins. It was initially identified as the enzyme that mediates cleavage of precursor tRNAs at the 5′-end termini to generate the mature tRNAs. An important characteristic of RNase P is that its specificity depends on the structure rather than the sequence of the RNA substrate. Any RNA species that interacts with an antisense molecule (called external guide sequence, EGS) and forms the appropriate structure can be cleaved by RNase P. This property is the basis for EGS technology, an antisense methodology for inhibiting gene expression by eliciting RNase P-mediated cleavage of a target mRNA molecule. EGS technology is being developed to design therapies against a large variety of diseases. An essential milestone in developing EGSs as therapies is the assessment of the efficiency of antisense molecules to induce cleavage of the target mRNA and evaluate their effect in vivo. Here, we describe simple protocols to test the ability of EGSs to induce cleavage of a target mRNA in vitro and to induce a phenotypic change in growing cells.

Keywords

Antisense Ribozyme RNase P Antibiotic resistance Aminoglycoside 

Notes

Acknowledgments

This work was supported by Public Health Service grant 2R15AI047115-04 from the National Institute of Allergy and Infectious Diseases, National Institutes of Health. A.J. was funded in part by LA Basin Minority Health and Health Disparities International Research Training Program (MHIRT) 5T37MD001368.

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Copyright information

© Springer Science+Business Media, LLC 2018

Authors and Affiliations

  • Saumya Jani
    • 1
  • Alexis Jackson
    • 1
    • 2
  • Carol Davies-Sala
    • 1
    • 2
  • Kevin Chiem
    • 1
  • Alfonso Soler-Bistué
    • 1
    • 2
  • Angeles Zorreguieta
    • 2
  • Marcelo E. Tolmasky
    • 1
    Email author
  1. 1.Center for Applied Biotechnology Studies, College of Natural Sciences and MathematicsCalifornia State University FullertonFullertonUSA
  2. 2.Fundación Instituto Leloir, IIBBA-CONICET, and FCEyN, University of Buenos AiresAiresArgentina

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