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We present an algorithmic approach for determining, in polynomial time, disulfide bonds in proteins using mass spectrometry data. The proposed technique is based on matching the set of all theoretically possible disulfide bonded structures with precursor ions derived from a tandem MS/MS experiment. For each match found, theoretical fragments from a disulfide bonded peptide structure are matched with...
The tertiary structure and biological function of a protein can be better understood given knowledge of the number and location of its disulfide bonds. By utilizing mass spectrometric (MS) experimental procedures that produce spectra of the protein's peptides joined by a disulfide bond, we can make initial identifications of these bonded cysteine pairings. The algorithmic problem then becomes how...
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