Method and system for determination of molecular interaction parameters
First Claim
1. A method of determining kinetic parameters for a reversible molecular interaction between a ligand immobilized to a solid support surface and a binding partner to the ligand in solution, comprising the steps of:
- a) sequentially, without intermediate regeneration or renewal of the immobilized ligand, flowing a plurality of fluid volumes containing different known concentrations of the binding partner over the solid support surface to permit association of binding partner to the immobilized ligand,b) flowing over the solid support surface a fluid volume free from binding partner to permit dissociation of binding partner from the ligand,c) monitoring during steps a) and b) the momentary amount of binding partner bound to the solid support surface related to time and solution concentration of binding partner and collecting the binding data, wherein steps a) to c) are repeated at least once with the same or another sequence of binding partner concentrations, andd) determining the kinetic parameters by simultaneously fitting a predetermined kinetic model for the interaction between the binding partner and the immobilized ligand to all the collected binding data, which model allows for mass transport limitation at the solid support surface.
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Abstract
A method of determining kinetic parameters for a reversible molecular interaction between a ligand immobilized to a solid support surface and a binding partner to the ligand in solution, comprises sequentially, without intermediate regeneration or renewal of the immobilized ligand, flowing a plurality of fluid volumes containing different known concentrations of the binding partner over the solid support surface, monitoring the momentary amount of binding partner bound to the solid support surface related to time and solution concentration of binding partner and collecting the binding data, and determining the kinetic parameters by globally fitting a predetermined kinetic model for the interaction between the binding partner and the immobilized ligand to the collected binding data, which model allows for mass transport limitation at the solid support surface. An analytical system for carrying out the method, a computer program, a computer program product and a computer system for performing the method are also disclosed.
33 Citations
37 Claims
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1. A method of determining kinetic parameters for a reversible molecular interaction between a ligand immobilized to a solid support surface and a binding partner to the ligand in solution, comprising the steps of:
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a) sequentially, without intermediate regeneration or renewal of the immobilized ligand, flowing a plurality of fluid volumes containing different known concentrations of the binding partner over the solid support surface to permit association of binding partner to the immobilized ligand, b) flowing over the solid support surface a fluid volume free from binding partner to permit dissociation of binding partner from the ligand, c) monitoring during steps a) and b) the momentary amount of binding partner bound to the solid support surface related to time and solution concentration of binding partner and collecting the binding data, wherein steps a) to c) are repeated at least once with the same or another sequence of binding partner concentrations, and d) determining the kinetic parameters by simultaneously fitting a predetermined kinetic model for the interaction between the binding partner and the immobilized ligand to all the collected binding data, which model allows for mass transport limitation at the solid support surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of determining kinetic parameters for reversible molecular interactions between a ligand immobilized to a solid support surface and a plurality of different binding partners to the ligand in solution, comprising the steps of:
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a) sequentially, without intermediate regeneration or renewal of the immobilized ligand, flowing a plurality of fluid volumes containing different binding partners over the solid support surface to permit association of binding partners to the immobilized ligand, b) after the addition of each fluid volume containing binding partner, flowing over the solid support surface a fluid volume free from binding partner to permit dissociation of binding partner from the ligand, c) monitoring during steps a) and b) the momentary amount of binding partner bound to the solid support surface related to time and solution concentration of binding partner and collecting the binding data, wherein steps a) to c) are repeated at least once with the same or another sequence of binding partner concentrations, and d) determining the kinetic parameters by simultaneously fitting a predetermined kinetic model for the interaction between each binding partner and the immobilized ligand to all the collected binding data, which model allows for mass transport limitation at the solid support surface. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method of determining kinetic parameters for a reversible molecular interaction between a ligand immobilized to a sensor surface and a binding partner to the ligand in solution, comprising the steps of:
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a) sequentially, without intermediate regeneration or renewal of the immobilized ligand, flowing a plurality of fluid volumes containing different concentrations of the binding partner over the solid support surface to permit association of binding partner to the immobilized ligand, wherein the fluid volumes containing binding partner are discrete segments of a concentration gradient of the binding partner separated by segments of fluid free from binding partner, b) monitoring during step a) the momentary amount of binding partner bound to the solid support surface related to time and solution concentration of binding partner and collecting the binding data, wherein steps a) to b) are repeated at least once with the same or another sequence of binding partner concentration, and c) determining the kinetic parameters by simultaneously fitting a predetermined kinetic model for the interaction between the binding partner and the immobilized ligand to all the collected binding data. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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Specification