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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Genotyping by ligation assays.

D A Nickerson1, W Ankener, C Delahunty

  • 1University of Washington School of Medicine, Seattle, Washington, USA.

Current Protocols in Human Genetics
|April 23, 2008
PubMed
Summary
This summary is machine-generated.

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This study presents two DNA genotyping methods: a colorimetric oligonucleotide ligation assay (OLA) after polymerase chain reaction (PCR) amplification and ligase chain reaction (LCR) for simultaneous amplification and genotyping. Both methods efficiently detect known nucleotide variations in DNA sequences.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Accurate genotyping of DNA sequences with known nucleotide variations is crucial for genetic studies.
  • Existing methods may require multiple steps or lack simultaneous amplification and genotyping capabilities.

Purpose of the Study:

  • To describe two distinct methods for genotyping DNA sequences.
  • To provide protocols for oligonucleotide ligation assay (OLA) and ligase chain reaction (LCR).

Main Methods:

  • Colorimetric genotyping of polymerase chain reaction (PCR)-amplified DNA using an oligonucleotide ligation assay (OLA).
  • Simultaneous amplification and genotyping of genomic DNA via ligase chain reaction (LCR).
  • Preparation of modified biotin- and digoxigenin-labeled oligonucleotide primers.

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Main Results:

  • Successful implementation of a colorimetric OLA for genotyping amplified DNA.
  • Demonstration of LCR for efficient, simultaneous amplification and genotyping of genomic DNA.
  • Detailed protocol for preparing essential labeled oligonucleotide primers.

Conclusions:

  • Two robust methods, OLA and LCR, are presented for genotyping DNA with known variations.
  • These protocols offer valuable tools for molecular biology and genetic analysis.
  • The described methods facilitate precise detection of nucleotide variations.