Novel Affinity Ligands for Chromatography Using Combinatorial Chemistry

Tor      Regberg; Charlotta      Lindquist; Ake      Pilotti; Christel      Ellstrom; Lars      Fagerstam; Ann      Eckersten; Yasuro      Shinohara; Steven      L. Gallion; Joseph      C. Hogan

Abstract

Spatially addressable combinatorial libraries were synthesized by solution phase chemistry and screened for binding to human serum albumin. Members of arylidene diamide libraries were among the best hits found, having submicromolar binding affinities. The results were analyzed by the frequency with which particular substituents appeared among the most potent compounds. After immobilization of the ligands either through the oxazolone or the amine substituent, characterization by surface plasmon resonance showed that ibuprofen affected the binding kinetics, but phenylbutazone did not. It is therefore likely that these compounds bind to Site 2 in sub domain IIIA of human serum albumin (HSA).

Keywords: Affinity chromatography, combinatorial chemistry, high-throughput screening, arylidene diamide library, Ligands, macromolecules, structure-activity relationships, HPLC, Immobilization, Solution Phase Screening