Binding properties of HABA-type azo derivatives to avidin and avidin-related protein 4

Susanna Repo, Tiina A.Paldanius [Unknown], Vesa P. Hytönen, Thomas Nyholm, Katrin K. Halling, Juhani Huuskonen, Olli T. Pentikäinen, Kari Rissanen, J Peter Slotte, Tomi Airenne, Tiina Salminen, Markku S .Kulomaa, Mark S Johnson

    Research output: Contribution to journalArticleScientificpeer-review

    37 Citations (Scopus)

    Abstract

    The chicken genome encodes several biotin-binding proteins, including avidin and avidin-related protein 4 (AVR4). In addition to D-biotin, avidin binds an azo dye compound, 4-hydroxyazobenzene-2-carboxylic acid (HABA), but the HABA-binding properties of AVR4 are not yet known. Differential scanning calorimetry, UV/visible spectroscopy, and molecular modeling were used to analyze the binding of 15 azo molecules to avidin and AVR4. Significant differences are seen in azo compound preferences for the two proteins, emphasizing the importance of the loop between strands beta 3 and beta 4 for azo ligand recognition; information on these loops is provided by the high-resolution (1.5 angstrom) X-ray structure for avidin reported here. These results may be valuable in designing improved tools for avidin-based life science and nanobiotechnology applications.
    Original languageUndefined/Unknown
    Pages (from-to)1029–1039
    Number of pages11
    JournalChemistry and Biology
    Volume13
    Issue number10
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

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