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Full-Text Articles in Medicine and Health Sciences
Structure And Conformational Properties Of D-Glucose/D-Galactose-Binding Protein In Crowded Milieu, Alexander V. Fonin, Sergey A. Silonov, Asiia K. Sitdikova, Irina M. Kuznetsova, Vladimir N. Uversky
Structure And Conformational Properties Of D-Glucose/D-Galactose-Binding Protein In Crowded Milieu, Alexander V. Fonin, Sergey A. Silonov, Asiia K. Sitdikova, Irina M. Kuznetsova, Vladimir N. Uversky
Molecular Medicine Faculty Publications
Conformational changes of d-glucose/d-galactose-binding protein (GGBP) were studied under molecular crowding conditions modeled by concentrated solutions of polyethylene glycols (PEG-12000, PEG-4000, and PEG-600), Ficoll-70, and Dextran-70, addition of which induced noticeable structural changes in the GGBP molecule. All PEGs promoted compaction of GGBP and lead to the increase in ordering of its structure. Concentrated solutions of PEG-12000 and PEG-4000 caused GGBP aggregation. Although Ficoll-70 and Dextran-70 also promoted increase in the GGBP ordering, the structural outputs were different for different crowders. For example, in comparison with the GGBP in buffer, the intrinsic fluorescence spectrum of this protein was shifted to …
Osmolyte-Like Stabilizing Effects Of Low Gdnhcl Concentrations On D-Glucose/D-Galactose-Binding Protein, Alexander V. Fonin, Alexandra D. Golikova, Irina A. Zvereva, Sabato D’Auria, Maria Staiano, Vladimir N. Uversky, Irina M. Kuznetsova, Konstantin K. Turoverov
Osmolyte-Like Stabilizing Effects Of Low Gdnhcl Concentrations On D-Glucose/D-Galactose-Binding Protein, Alexander V. Fonin, Alexandra D. Golikova, Irina A. Zvereva, Sabato D’Auria, Maria Staiano, Vladimir N. Uversky, Irina M. Kuznetsova, Konstantin K. Turoverov
Molecular Medicine Faculty Publications
The ability of d-glucose/d-galactose-binding protein (GGBP) to reversibly interact with its ligands, glucose and galactose, makes this protein an attractive candidate for sensing elements of glucose biosensors. This potential is largely responsible for attracting researchers to study the conformational properties of this protein. Previously, we showed that an increase in the fluorescence intensity of the fluorescent dye 6-bromoacetyl-2-dimetylaminonaphtalene (BADAN) is linked to the holo-form of the GGBP/H152C mutant in solutions containing sub-denaturing concentrations of guanidine hydrochloride (GdnHCl). It was hypothesized that low GdnHCl concentrations might lead to compaction of the protein, thereby facilitating ligand binding. In this work, we utilize …