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- W2316590129 abstract "We have developed a surface plasmon resonance (SPR)-based inhibition in solution assay (ISA) to search for inhibitors of the medium affinity (KD = 0.8 μM) interaction between an E6-derived peptide (E6peptide) immobilized on the sensor and a PDZ domain (MAGI-1 PDZ1) in the mobile phase. DZ domains are widespread protein-protein interaction modules that recognize the C-terminus of various partners. Simulations indicated that relatively low compound concentrations (10 μM) and limited peptide densities (Rmax < 200 resonance units) should allow the detection of inhibitors with a target affinity close to 100 μM, which was then demonstrated experimentally. ISA screening, carried out on the Prestwick Chemical Library® (1120 compounds), identified 36 compounds that inhibited the interaction by more than 5%. Concentration-dependent ISA, carried out on a subset of 19 potential inhibitors, indicated that 13 of these indeed affected the interaction between MAGI-1 PDZ1 and the E6peptide. No effect was observed for 84 compounds randomly chosen among noninhibitors. One of the four best inhibitors was a peptide binder, and three were PDZ binders with KD in the 10–50 μM range. We propose that a medium (μM) affinity between the target and surface-bound partner is optimal for SPR-based ISA screening." @default.
- W2316590129 created "2016-06-24" @default.
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- W2316590129 date "2013-08-30" @default.
- W2316590129 modified "2023-10-09" @default.
- W2316590129 title "Chemical Library Screening Using a SPR-Based Inhibition in Solution Assay: Simulations and Experimental Validation" @default.
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- W2316590129 doi "https://doi.org/10.1021/ac4019445" @default.
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