Chapter title |
Characterization of protein-protein interactions by isothermal titration calorimetry.
|
---|---|
Chapter number | 11 |
Book title |
Protein-Protein Interactions
|
Published in |
Methods in molecular biology, January 2015
|
DOI | 10.1007/978-1-4939-2425-7_11 |
Pubmed ID | |
Book ISBNs |
978-1-4939-2424-0, 978-1-4939-2425-7
|
Authors |
Velazquez-Campoy, Adrian, Leavitt, Stephanie A, Freire, Ernesto, Adrian Velazquez-Campoy, Stephanie A. Leavitt, Ernesto Freire, Leavitt, Stephanie A. |
Abstract |
The analysis of protein-protein interactions has attracted the attention of many researchers from both a fundamental point of view and a practical point of view. From a fundamental point of view, the development of an understanding of the signaling events triggered by the interaction of two or more proteins provides key information to elucidate the functioning of many cell processes. From a practical point of view, understanding protein-protein interactions at a quantitative level provides the foundation for the development of antagonists or agonists of those interactions. Isothermal Titration Calorimetry (ITC) is the only technique with the capability of measuring not only binding affinity but the enthalpic and entropic components that define affinity. Over the years, isothermal titration calorimeters have evolved in sensitivity and accuracy. Today, TA Instruments and MicroCal market instruments with the performance required to evaluate protein-protein interactions. In this methods paper, we describe general procedures to analyze heterodimeric (porcine pancreatic trypsin binding to soybean trypsin inhibitor) and homodimeric (bovine pancreatic α-chymotrypsin) protein associations by ITC. |
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