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Arrayed primer extension reaction for genotyping on oligonucleotide microarray.
Janne Pullat1, Andres Metspalu
1Department of Biotechnology, Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia.
Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2008
Summary
Arrayed primer extension (APEX) is a robust enzymatic genotyping method for analyzing thousands of genomic variations in one reaction. This technique uses single base extension for highly specific discrimination of single nucleotide polymorphisms and other genomic features.
Area of Science:
- Genomics
- Molecular Biology
- Biotechnology
Background:
- Genotyping methods are crucial for analyzing genetic variations.
- Existing methods may have limitations in specificity or throughput.
- Arrayed primer extension (APEX) offers a robust enzymatic approach.
Purpose of the Study:
- To describe the Arrayed Primer Extension (APEX) reaction as a versatile genotyping tool.
- To highlight the specificity and multiplexing capabilities of APEX.
- To showcase the broad applications of APEX in genomic analysis.
Main Methods:
- APEX utilizes a DNA polymerase and four different dye terminators for single base extension.
- Primers are designed adjacent to the target DNA base for precise identification.
- Multiplexed reactions allow simultaneous analysis of hundreds to thousands of genomic variations.
Main Results:
- APEX achieves highly specific genotype discrimination without allele-specific hybridization.
- The method enables single nucleotide polymorphism (SNP) analysis, mutation detection, and DNA resequencing.
- APEX can also analyze insertions, deletions, splice variants, and gene copy numbers.
Conclusions:
- APEX is a powerful and adaptable enzymatic method for comprehensive genomic analysis.
- Its high specificity and multiplexing capacity make it suitable for various genetic studies, including methylation analysis.
- APEX provides a robust platform for high-throughput genotyping and variant detection.
