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Updated: Jul 2, 2026
15:22
Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
Published on: April 3, 2014
Long, processive enzymatic DNA synthesis using 100% dye-labeled terminal phosphate-linked nucleotides
Jonas Korlach1, Arek Bibillo, Jeffrey Wegener
1Pacific Biosciences Inc., Menlo Park, California 94025, USA.
Nucleosides, Nucleotides & Nucleic Acids
|August 20, 2008
Summary
Researchers developed fluorescently labeled nucleotides for DNA synthesis. These labeled deoxyribonucleoside triphosphates (dNTPs) enable efficient, real-time DNA sequencing with high fidelity, approaching natural DNA polymerization rates.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Deoxyribonucleoside triphosphates (dNTPs) are essential building blocks for DNA synthesis.
- Current DNA sequencing methods face limitations in real-time monitoring and efficiency.
- Fluorescent labeling of nucleotides offers potential for advanced molecular detection techniques.
Purpose of the Study:
- To synthesize DNA using fluorescently labeled nucleotides that completely replace natural dNTPs.
- To evaluate the efficiency and fidelity of DNA synthesis with these novel labeled nucleotides.
- To assess the suitability of these labeled nucleotides for single-molecule, real-time DNA sequencing.
Main Methods:
- Conjugation of spectrally separable fluorescent dyes to the terminal phosphate of each of the four dNTPs.
- DNA synthesis using phi 29 DNA polymerase with the modified nucleotides.
- Processivity and kinetic analysis of DNA polymerization using single-molecule fluorescence detection.
Main Results:
- Efficient DNA synthesis was achieved with complete replacement of natural dNTPs by labeled nucleotides.
- The modified nucleotides exhibited high affinities and polymerization rates comparable to unmodified dNTPs.
- Processive DNA synthesis was observed for long DNA products (thousands of bases).
Conclusions:
- The developed fluorescently labeled nucleotides are compatible with efficient DNA synthesis.
- These labeled nucleotides show promise for single-molecule, real-time DNA sequencing applications.
- This advancement facilitates high-throughput and accurate genomic analysis.
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