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    J Am Soc Mass Spectrom. 2006 Mar;17(3):395-405. Epub 2006 Jan 27.

    Influence of crosslinker identity and position on gas-phase dissociation of Lys-Lys crosslinked peptides.

    Gaucher SP, Hadi MZ, Young MM.

    Sandia National Laboratories, Livermore, California 94551-0969, USA. spgauch@sandia.gov

    A systematic study of the dissociation patterns of crosslinked peptides analyzed by tandem mass spectrometry is reported. A series of 11-mer peptides was designed around either a polyalanine or polyglycine scaffold with arginine at the C terminus. One or two lysine residues were included at various locations within the peptides to effect inter- or intra-molecular crosslinking, respectively. Crosslinked species were generated with four commonly used amine-specific chemical crosslinking reagents: disuccinimidyl suberate (DSS), disuccinimidyl tartarate (DST), dithiobis(succinimidylpropionate) (DSP), and disuccinimidyl glutarate (DSG). The influence of precursor charge state, location of crosslink, and specific crosslinking reagent on the MS/MS dissociation pattern was examined. Observed trends in the dissociation patterns obtained for these species will allow for improvements to software used in the automated interpretation of crosslinked peptide MS/MS data.

    PMID: 16443364 [PubMed - indexed for MEDLINE]

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