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Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: July 1, 2013
MALDI-TOF based mutation detection using tagged in vitro synthesized peptides.
A M Garvin1, K C Parker, L Haff
1[1] PE Biosystems, 500 Old Connecticut Path, Framingham, MA 01701. [2] Current address: Department of Biochemistry, Biocentre, University of Basel, CH-4056, Basel, Switzerlandc. alex.garvin@unibas.ch
Nature Biotechnology
|January 14, 2000
Summary
This study presents a novel method for analyzing DNA mutations using mass spectrometry. It converts PCR-amplified DNA into tagged peptides for accurate mass analysis, enabling efficient genetic profiling.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) is effective for peptide mass determination.
- Analyzing DNA directly with MALDI-TOF is challenging, often requiring initial DNA amplification via PCR.
Purpose of the Study:
- To develop a method for analyzing PCR-amplified DNA sequences using MALDI-TOF.
- To enable efficient mutation discovery and genetic profiling.
Main Methods:
- A coupled in vitro transcription/translation system is used to encode N-terminally tagged peptides from PCR products.
- Peptides are purified using their tags and analyzed by MALDI-TOF mass spectrometry.
- The method was applied to analyze peptides coded by the BRCA1 gene.
Main Results:
- The method successfully identified truncations and amino acid substitutions in BRCA1-coded peptides.
- The process demonstrated multiplexing capabilities and amenability to automation.
- Accurate peptide mass measurements were achieved via MALDI-TOF.
Conclusions:
- This technique provides an efficient, high-throughput approach for mutation discovery.
- It bridges the gap between DNA analysis and peptide mass spectrometry.
- The method is suitable for genetic profiling and automated mutation detection.
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