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SOS: a simple interactive program for ab initio oligonucleotide sequencing by mass spectrometry
Jef Rozenski1, James A McCloskey
1Rega Institute for Medical Research, Katholieke Universiteit Leuven, Belgium. jef.rozenski@rega.kuleuven.ac.be
Journal of the American Society for Mass Spectrometry
|March 23, 2002
Summary
A new computer program, Simple Oligonucleotide Sequencer (SOS), enables rapid sequencing of oligonucleotides up to 20 bases using mass spectrometry. This tool aids in analyzing modified and unmodified DNA and RNA sequences.
Area of Science:
- Biochemistry
- Bioinformatics
- Analytical Chemistry
Background:
- Mass spectrometry is crucial for analyzing biomolecules like oligonucleotides.
- Determining oligonucleotide sequences, especially modified ones, presents analytical challenges.
Purpose of the Study:
- To develop a user-friendly software tool for rapid oligonucleotide sequencing.
- To enable residue-by-residue sequence determination from mass spectra.
- To facilitate analysis of modified and unmodified oligonucleotides.
Main Methods:
- Utilizing electrospray ionization and collision-induced dissociation mass spectrometry.
- Developing the interactive, stand-alone Simple Oligonucleotide Sequencer (SOS) program.
- Implementing user-controlled, residue-by-residue analysis with customizable modification definitions.
Main Results:
- The SOS program allows for rapid sequencing of oligonucleotides up to 20-mer length.
- Sequence ladders can be constructed in both 5' to 3' and 3' to 5' directions.
- The software facilitates easy modification of sequences and comparison of sequence ladders.
Conclusions:
- The SOS program provides an effective method for ab initio sequencing and verification.
- This tool is valuable for studying fragmentation processes in oligonucleotide derivatives.
- The software supports the analysis of both modified and unmodified oligonucleotides.