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Electrophoretic affinity measurements on microchip. Determination of binding affinities between diketopiperazine receptors and peptide ligands
Author(s) -
Stettler Alexandra R.,
Krattiger Philipp,
Wennemers Helma,
Schwarz Maria A.
Publication year - 2007
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200600545
Subject(s) - affinities , isothermal titration calorimetry , chemistry , tripeptide , ligand (biochemistry) , receptor , binding affinities , affinity electrophoresis , capillary electrophoresis , stereochemistry , peptide , combinatorial chemistry , biophysics , chromatography , biochemistry , affinity chromatography , biology , enzyme
ACE on a microchip (MC‐ACE) is introduced as a fast and reliable method to determine binding affinities. It is based on monitoring the change in the ionic mobility of a receptor upon binding to a ligand, or vice versa . The method is complementary to other standard methods for binding affinity determinations, like isothermal titration calorimetry (ITC), NMR, UV‐Vis spectroscopy, etc . and allows for affinity studies of weak to strong binding interactions. The method is attractive since it principally allows for the analysis of the binding affinity of multiple receptors to a given ligand and requires comparatively small quantities of the binding partners (particularly in comparison to affinity measurements on capillary). We demonstrate the applicability of MC‐ACE for the determination of the binding affinities between acid‐rich diketopiperazine receptors and basic tripeptides in aqueous solution.