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Bst DNA polymerase permits rapid sequence analysis from nanogram amounts of template
D A Mead1, J A McClary, J A Luckey
1Department of Chemistry, University of Wisconsin, Madison 53706.
Biotechniques
|July 1, 1991
Summary
This study presents a fast, cost-effective enzymatic DNA sequencing method using Bacillus DNA polymerase. It enables efficient analysis of nanogram DNA amounts, paving the way for direct sequencing of M13 plaques.
Area of Science:
- Molecular Biology
- Biochemistry
- Genomics
Background:
- Enzymatic DNA sequencing traditionally requires significant amounts of template DNA and time.
- Existing methods can be costly due to enzyme and reagent consumption.
- Efficient sequencing of small DNA quantities is crucial for various molecular biology applications.
Purpose of the Study:
- To develop a simple, rapid, and cost-effective enzymatic DNA sequencing method.
- To enable the analysis of nanogram quantities of single- or double-stranded DNA.
- To assess the feasibility of direct DNA sequencing from biological samples like bacteriophage plaques.
Main Methods:
- Utilized a thermostable DNA polymerase from Bacillus sterothermophilus for enzymatic sequencing.
- Exploited the polymerase's efficient extension of template-primer complexes, even at low substrate concentrations.
- Minimized pipetting steps and eliminated the need for a preannealing step, reducing reaction time.
Main Results:
- The method efficiently sequences nanogram amounts of DNA with minimal reaction time and few steps.
- Demonstrated the ability to analyze as little as 10-ng of sequencing reaction products using fluorescence-based capillary gel electrophoresis.
- Achieved significant cost reduction in DNA polymerase usage and overall reaction time.
Conclusions:
- The developed enzymatic sequencing method is simple, rapid, and cost-effective.
- High sensitivity detection allows for the analysis of minute DNA quantities.
- The method supports the direct DNA sequencing of single bacteriophage M13 plaques without prior amplification, demonstrating its potential for direct sample analysis.