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RESEARCH PRODUCT
Binding Properties of HABA-Type Azo Derivatives to Avidin and Avidin-Related Protein 4
J. Peter SlotteThomas K.m. NyholmJuhani HuuskonenKari RissanenTiina PaldaniusTiina A. SalminenTomi T. AirenneKatrin K. HallingVesa P. HytönenOlli T. PentikäinenSusanna RepoMark S. JohnsonMarkku S. Kulomaasubject
Models MolecularMolecular modelOvalbuminProtein ConformationClinical BiochemistryCrystallography X-RayLigandsSensitivity and SpecificityBiochemistryAvian Proteinschemistry.chemical_compoundUltraviolet visible spectroscopyBiotinDrug DiscoveryAnimalsMolecular BiologyGlycoproteinschemistry.chemical_classificationPharmacologyAzo compoundBinding SitesbiologyCalorimetry Differential ScanningMolecular StructureStereoisomerismGeneral MedicineLigand (biochemistry)AvidinCombinatorial chemistryCHEMBIOchemistryBiochemistryBiotinylationbiology.proteinMolecular MedicineSpectrophotometry UltravioletGlycoproteinAzo CompoundsChickensAvidindescription
Summary 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 β3 and β4 for azo ligand recognition; information on these loops is provided by the high-resolution (1.5 A) X-ray structure for avidin reported here. These results may be valuable in designing improved tools for avidin-based life science and nanobiotechnology applications.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-10-01 | Chemistry & Biology |