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    Characterization of Peptide-Oligonucleotide Heteroconjugates by Mass Spectrometry

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    AldrichJ_NAR_24(19)3866.pdf (105.9Kb)
    Issue Date
    1996-09-15
    Author
    Jensen, Ole N.
    Kulkarni, Sandhya
    Aldrich, Jane V.
    Barofsky, Douglas F.
    Publisher
    Oxford University Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    Two peptide-oligothymidylic acids, prepared by joining an 11 residue synthetic peptide containing one internal carboxyl group (Asp side chain) to amino-linker-5′pdT6 and amino-linker-5′pdT10 oligonucleotides, were analyzed by matrix-assisted laser desorption/ionization (MALDI) on a linear time-of-flight mass spectrometer and by electrospray ionization (ESI) on a triple-quadru-pole system. These synthetic compounds model peptide -nucleic acid heteroconjugates encountered in anti-sense research and in studies that use photochemical crosslinking to investigate molecular aspects of protein-nucleic acid interactions. MALDI and ESI sensitivities for the two hybrid compounds were found to be similar respectively to their sensitivities for the pure oligonucleotide parts. In general, MALDI proved to be less affected by sample impurities and more sensitive than ESI, while ESI on the quadrupole produced greater mass accuracy and resolution than MALDI on the time-of-flight instrument. A hybrid's behavior in a MALDI-matrix or an ESI-spray-solvent was found to be governed mainly by the oligonucleotide. A single positive ESI tandem mass spectrum of the peptide-dT6 accounted for the heteroconjugate's entire primary structure including the point of the oligonucleo-tide's covalent attachment to the peptide.
    Description
    This is the publisher's version, also available electronically from "http://nar.oxfordjournals.org".
    URI
    http://hdl.handle.net/1808/17642
    DOI
    https://doi.org/10.1093/nar/24.19.3866
    Collections
    • Pharmacy Scholarly Works [280]
    Citation
    Jensen, O., Kulkarni, S., Aldrich, J., & Barofsky, D. (1996). Characterization of peptide-oligonucleotide heteroconjugates by mass spectrometry. Nucleic Acids Research, 24(19), 3866-3872. http://www.dx.doi.org/10.1093/nar/24.19.3866

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    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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