Modeling complex equilibria in isothermal titration calorimetry experiments: thermodynamic parameters estimation for a three-binding-site model.
Modeling complex equilibria in isothermal titration calorimetry experiments: thermodynamic parameters estimation for a three-binding-site model.
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DOI:
10.1016/j.ab.2012.11.030
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发表时间:
2013-03-15
影响因子:
2.9
通讯作者:
Lewis EA
中科院分区:
文献类型:
--
作者:
Le VH;Buscaglia R;Chaires JB;Lewis EA
Isothermal Titration Calorimetry, ITC, is a powerful technique that can be used to estimate a complete set of thermodynamic parameters (e.g. Keq (or ΔG), ΔH, ΔS, and n) for a ligand binding interaction described by a thermodynamic model. Thermodynamic models are constructed by combination of equilibrium constant, mass balance, and charge balance equations for the system under study. Commercial ITC instruments are supplied with software that includes a number of simple interaction models, for example one binding site, two binding sites, sequential sites, and n-independent binding sites. More complex models for example, three or more binding sites, one site with multiple binding mechanisms, linked equilibria, or equilibria involving macromolecular conformational selection through ligand binding need to be developed on a case by case basis by the ITC user. In this paper we provide an algorithm (and a link to our MATLAB program) for the non-linear regression analysis of a multiple binding site model with up to four overlapping binding equilibria. Error analysis demonstrates that fitting ITC data for multiple parameters (e.g. up to nine parameters in the three binding site model) yields thermodynamic parameters with acceptable accuracy.
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影响因子:
3.9
作者:
Chaires, Jonathan B.
通讯作者:
Chaires, Jonathan B.
影响因子:
2.9
作者:
Hansen, Lee D.;Fellingham, Gilbert W.;Russell, Donald J.
通讯作者:
Russell, Donald J.
影响因子:
120.1
作者:
Ladbury, John E.;Klebe, Gerhard;Freire, Ernesto
通讯作者:
Freire, Ernesto
DOI:
10.1111/j.1742-4658.2009.07462.x
发表时间:
2010-03
期刊:
The FEBS journal
影响因子:
--
作者:
Chaires JB
通讯作者:
Chaires JB
影响因子:
7.7
作者:
Doyle, ML
通讯作者:
Doyle, ML