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    A priori intrinsic PTM size parameters for predicting the ion mobilities of modified peptides

    Date
    2017-02
    Author
    Kaszycki, Julia L.
    Shvartsburg, Alexandre A.
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    Citation
    Kaszycki, J.L. & Shvartsburg, A.A. J. Am. Soc. Mass Spectrom. (2017) 28: 294
    Abstract
    The rising profile of ion mobility spectrometry (IMS) in proteomics has driven the efforts to predict peptide cross-sections. In the simplest approach, these are derived by adding the contributions of all amino acid residues and post-translational modifications (PTMs) defined by their intrinsic size parameters (ISPs). We show that the ISPs for PTMs can be calculated from properties of constituent atoms, and introduce the "impact scores" that govern the shift of cross-sections from the central mass-dependent trend for unmodified peptides. The ISPs and scores tabulated for 100 more common PTMs enable predicting the domains for modified peptides in the IMS/MS space that would guide subproteome investigations.
    Description
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    URI
    http://dx.doi.org/10.1007/s13361-016-1553-3
    http://hdl.handle.net/10057/12885
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