Pre-equilibration kinetic size-exclusion chromatography with mass spectrometry detection (peKSEC-MS) for label-free solution-based kinetic analysis of protein–small molecule interactions

Literature Information

Publication Date 2015-01-07
DOI 10.1039/C4AN02232G
Impact Factor 4.616
Authors

Jiayin Bao, Svetlana M. Krylova, Leonid T. Cherney, J. C. Yves Le Blanc, Patrick Pribil, Philip E. Johnson, Derek J. Wilson, Sergey N. Krylov


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Abstract

Here we introduce pre-equilibration kinetic size-exclusion chromatography with mass-spectrometry detection (peKSEC-MS), which is a label-free solution-based kinetic approach for characterizing non-covalent protein–small molecule interactions. In this method, a protein and a small molecule are mixed outside the column and incubated to approach equilibrium. The equilibrium mixture is then introduced into the SEC column to initiate the dissociation process by separating small molecules from the complex inside the column. A numerical model of a 1-dimensional separation was constructed to simulate mass chromatograms of the small molecule for varying rate constants of binding.

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