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In vitro selection and characterization of cellulose-binding RNA aptamers using isothermal amplification.

B J Boese1, K Corbino, R R Breaker

  • 1Department of Chemical Engineering, Yale University, New Haven, Connecticut 06520-8103, USA.

Nucleosides, Nucleotides & Nucleic Acids
|August 13, 2008
PubMed
Summary

Researchers developed novel RNA aptamers that bind specifically to cellulose. These aptamers enable the isolation of functional nucleic acids using cellulose affinity chromatography, offering a new tool for molecular engineering.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Synthetic Biology

Background:

  • Engineering complex functional nucleic acids requires specific molecular recognition and purification tools.
  • RNA aptamers offer programmable binding capabilities for diverse applications.

Purpose of the Study:

  • To create novel RNA aptamers with high specificity for cellulose.
  • To develop modular components for functional nucleic acid engineering.
  • To enable RNA isolation from complex mixtures using cellulose affinity chromatography.

Main Methods:

  • In vitro selection strategy incorporating self-sustained sequence replication (3SR) for RNA amplification.
  • Aptamer optimization through reselection.
  • Grafting the cellulose-binding aptamer onto a glmS ribozyme sequence.

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Main Results:

  • Identified a minimal RNA aptamer with robust binding to powdered and paper cellulose.
  • Demonstrated specificity, with no significant binding to related polysaccharides.
  • Successfully isolated ribozyme cleavage products from cellulose using the fused aptamer and a specific eluent.

Conclusions:

  • Developed specific cellulose-binding RNA aptamers as versatile tools for molecular engineering.
  • Demonstrated the utility of these aptamers for affinity purification of functional nucleic acids.
  • The aptamer-ribozyme fusion system provides a controllable method for isolating specific RNA products.