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Updated: Jan 4, 2026

Studying Ribonucleotide Incorporation: Strand-specific Detection of Ribonucleotides in the Yeast Genome and Measuring Ribonucleotide-induced Mutagenesis
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Studying Ribonucleotide Incorporation: Strand-specific Detection of Ribonucleotides in the Yeast Genome and Measuring Ribonucleotide-induced Mutagenesis

Published on: July 26, 2018

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Deoxyribonucleotide salvage falls short in whole animals

Christopher K Mathews1

  • 1Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon 97331 Christopher.Mathews@oregonstate.edu.

The Journal of Biological Chemistry
|November 3, 2019
PubMed

Insights

Ribonucleotide reductase (RNR) is crucial for DNA synthesis. This study reveals distinct deoxyribonucleotide triphosphate (dNTP) regulation in whole mouse hearts and skeletal muscles compared to cell cultures.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Ribonucleotide reductase (RNR) is a key enzyme in DNA synthesis.
  • Current understanding of RNR regulation is primarily derived from cell culture and purified protein studies.

Purpose of the Study:

  • To investigate RNR regulation in vivo within specific tissues.
  • To compare RNR regulation in whole organisms with existing models.

Main Methods:

  • Utilized Cre-Lox technology for targeted gene inactivation.
  • Inactivated RNR large subunit expression in mouse embryonic heart and skeletal muscle.

Main Results:

  • Demonstrated tissue-specific differences in dNTP regulation.
  • Revealed a regulatory landscape in vivo distinct from cell-based models.

Conclusions:

  • In vivo RNR regulation in heart and skeletal muscle differs significantly from in vitro findings.
  • Whole-animal studies are essential for a comprehensive understanding of DNA synthesis regulation.

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