Browsing by Author "Norton, Erienne G."
Now showing 1 - 1 of 1
- Results Per Page
- Sort Options
Item Time-Dependent Fluorescence Spectroscopy to Quantify Complex Binding Interactions(2020-11) Bernhard, Samuel P.; Goodman, Candace K.; Norton, Erienne G.; Alme, Daniel G.; Lawrence, C. Martin; Cloninger, Mary J.Measuring the binding affinity for proteins that can aggregate or undergo complex binding motifs presents a variety of challenges. In this study, fluorescence lifetime measurements using intrinsic tryptophan fluorescence were performed to address these challenges and to quantify the binding of a series of carbohydrates and carbohydrate-functionalized dendrimers to recombinant human galectin-3. Collectively, galectins represent an important target for study; in particular, galectin-3 plays a variety of roles in cancer biology. Galectin-3 binding dissociation constants (KD) were quantified: lactoside (73 ± 4 μM), methyllactoside (54 ± 10 μM), and lactoside-functionalized G(2), G(4), and G(6)-PAMAM dendrimers (120 ± 58 μM, 100 ± 45 μM, and 130 ± 25 μM, respectively). The chosen examples showcase the widespread utility of time-dependent fluorescence spectroscopy for determining binding constants, including interactions for which standard methods have significant limitations.