Journal of Protein Chemistry

, Volume 3, Issue 5–6, pp 479–489 | Cite as

II. Photoaffinity probes provide a general method to prepare peptide-conjugates from native protein fragments

  • J. M. Robert Parker
  • Robert S. Hodges


The advantages of using amino-directed photoprobes to couple native fragments, obtained by enzymatic digestion with trypsin, to protein carriers to prepare peptide-conjugates is described. The following photoprobe reagents were investigated:N-hydroxysuccinimidylp-azidobenzoate,N-hydroxysuccinimidyl ester ofp-azidobenzoylglycine,N-hydroxysuccinimidylp-benzoylbenzoate, and pentachlorophenyl ester ofp-benzoylbenzoyl glycine or the symmetric anhydride ofp-benzoylbenzoylglycine. These reagents modify only the NH2-terminal amino group and/or COOH-terminal ε-amino group of lysine of the tryptic fragments. Since the photoprobe is inert until photolysis, the probe-modified native fragment can be readily purified by high-performance liquid chromatography before cross-linking to the carrier molecule. The benzophenone photoprobes were shown to give the highest incorporation of peptide onto the protein carrier.

Key words

photoaffinity probes peptide-conjugates from native protein fragments benzophenone probes p-azidobenzoyl probes antibodies to protein fragments 


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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • J. M. Robert Parker
    • 1
  • Robert S. Hodges
    • 1
  1. 1.Department of Biochemistry and the Medical Research Council of Canada Group in Protein Structure and FunctionUniversity of AlbertaEdmontonCanada

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