Dideoxy sequencing method using denatured plasmid templates

Area of Science:

• Molecular Biology
• Biotechnology
• Genomics

Background:

• Dideoxy sequencing is a fundamental technique in molecular biology.
• Plasmid DNA is a common template for DNA sequencing.
• Optimizing existing methods is crucial for efficient genetic analysis.

Purpose of the Study:

• To improve the dideoxy sequencing method using plasmid DNA as a template.
• To develop a simpler, faster, and more reproducible DNA sequencing protocol.

Main Methods:

• Improved plasmid DNA extraction and purification using rapid alkaline lysis and RNase treatment.
• Direct denaturation of purified plasmid DNA with alkali.
• DNA sequencing reaction using synthetic oligonucleotide primers at elevated temperatures (≥37°C).

Main Results:

• The optimized method allows DNA sequencing within several hours from plasmid extraction to reaction completion.
• Crucial factors for reproducibility include RNA-free, supercoiled plasmid DNA, use of a heptadecamer primer, and reaction temperatures of 37°C or higher.
• The method successfully determined over a thousand nucleotides from a single DNA template.

Conclusions:

• The enhanced dideoxy sequencing protocol offers a rapid, simple, and powerful approach for DNA sequence determination.
• This improved method is suitable for high-throughput sequencing applications.
• The findings contribute to more efficient genetic research and analysis.