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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Related Experiment Video

Updated: Nov 1, 2025

Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts
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Predictable control of RNA lifetime using engineered degradation-tuning RNAs.

Qi Zhang1, Duo Ma2, Fuqing Wu1

  • 1School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.

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|June 22, 2021
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Summary
This summary is machine-generated.

Researchers developed degradation-tuning RNAs (dtRNAs) to precisely control RNA and gene expression dynamics. These novel RNA modules offer a predictable and modular way to tune transcript stability for diverse biotechnological applications.

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Area of Science:

  • Molecular Biology
  • Synthetic Biology
  • Biotechnology

Background:

  • Controlling RNA and gene expression dynamics is crucial for biotechnology.
  • Current methods for regulating transcript half-life lack predictability and modularity.
  • Existing approaches include native RNA stabilizers and engineered 5' stability hairpins.

Purpose of the Study:

  • To develop a novel, predictable, and modular system for tuning RNA and gene expression dynamics.
  • To introduce a library of RNA modules, termed degradation-tuning RNAs (dtRNAs), for modulating transcript stability.
  • To demonstrate the utility of dtRNAs across various biological systems and applications.

Main Methods:

  • Designed and synthesized a library of degradation-tuning RNAs (dtRNAs).
  • Tested dtRNAs in vitro and in vivo (Escherichia coli) to assess their impact on transcript stability.
  • Integrated dtRNAs into messenger RNAs and noncoding RNAs to modulate gene circuit dynamics and CRISPR interference.
  • Applied stabilizing dtRNAs in cell-free transcription-translation systems.
  • Combined dtRNAs with toehold switch sensors for diagnostic applications.

Main Results:

  • Achieved a 40-fold dynamic range in modulating transcript stability in Escherichia coli using dtRNAs.
  • Demonstrated minimal influence of dtRNAs on translation initiation.
  • Successfully tuned gene circuit dynamics and enhanced CRISPR interference in vivo.
  • Showcased the ability of stabilizing dtRNAs to tune gene and RNA aptamer production in cell-free systems.
  • Enhanced the performance of paper-based norovirus diagnostics by combining dtRNAs with toehold switch sensors.

Conclusions:

  • Degradation-tuning RNAs (dtRNAs) provide a powerful and versatile tool for precisely controlling RNA and gene expression.
  • dtRNAs offer a predictable and modular approach to RNA stability regulation, overcoming limitations of previous methods.
  • The demonstrated applications highlight the broad potential of dtRNAs in synthetic biology, diagnostics, and other biotechnological fields.