A1 Refereed original research article in a scientific journal
Binding properties of HABA-type azo derivatives to avidin and avidin-related protein 4
Authors: Repo S, Paidanius TA, Hytonen VP, Nyholm TKM, Hailing KK, Huuskonen J, Pentikainen T, Rissanen K, Slotte JP, Airenne TT, Salminen TA, Kulomaa MS, Johnson MS
Publisher: CELL PRESS
Publication year: 2006
Journal: Chemistry and Biology
Journal name in source: CHEMISTRY & BIOLOGY
Journal acronym: CHEM BIOL
Volume: 13
Issue: 10
First page : 1029
Last page: 1039
Number of pages: 11
ISSN: 1074-5521
DOI: https://doi.org/10.1016/j.chembiol.2006.08.006
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.
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.
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