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Título: | Direct Identification of Protein-Protein Interactions by Single-Molecule Force Spectroscopy |
Autor: | Vera, Andrés M. CSIC ORCID; Carrión-Vázquez, Mariano Sixto CSIC ORCID | Palabras clave: | Atomic force microscopy Biophysical methods Polyproteins Protein–protein interactions Single-molecule force spectroscopy |
Fecha de publicación: | 2-nov-2016 | Editor: | Wiley-VCH | Citación: | Angewandte Chemie (International Edition in English) 55(45): 13970-13973 (2016) | Resumen: | Single‐molecule force spectroscopy based on atomic force microscopy (AFM‐SMFS) has allowed the measurement of the intermolecular forces involved in protein‐protein interactions at the molecular level. While intramolecular interactions are routinely identified directly by the use of polyprotein fingerprinting, there is a lack of a general method to directly identify single‐molecule intermolecular unbinding events. Here, we have developed an internally controlled strategy to measure protein–protein interactions by AFM‐SMFS that allows the direct identification of dissociation force peaks while ensuring single‐molecule conditions. Single‐molecule identification is assured by polyprotein fingerprinting while the intermolecular interaction is reported by a characteristic increase in contour length released after bond rupture. The latter is due to the exposure to force of a third protein that covalently connects the interacting pair. We demonstrate this strategy with a cohesin–dockerin interaction. | Versión del editor: | http://dx.doi.org/10.1002/anie.201605284 | URI: | http://hdl.handle.net/10261/200049 | DOI: | 10.1002/anie.201605284 | ISSN: | 1433-7851 | E-ISSN: | 1521-3773 |
Aparece en las colecciones: | (IC) Artículos |
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