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Conformational change of bacteriorhodopsin quantitatively monitored by microcantilever sensors.
2970 - 2977.
Bacteriorhodopsin proteoliposomes were used as a model system to explore the applicability of micromechanical cantilever arrays to detect conformational changes in membrane protein patches. The three main results of our study concern: 1), reliable functionalization of micromechanical cantilever arrays with proteoliposomes using ink jet spotting; 2), successful detection of the prosthetic retinal removal (bleaching) from the bacteriorhodopsin protein by measuring the induced nanomechanical surface stress change; and 3), the quantitative response thereof, which depends linearly on the amount of removed retinal. Our results show this technique to be a potential tool to measure membrane protein-based receptor-ligand interactions and conformational changes.
|Title:||Conformational change of bacteriorhodopsin quantitatively monitored by microcantilever sensors|
|Keywords:||NANOMECHANICAL CANTILEVER ARRAY, ATOMIC-FORCE MICROSCOPY, INDUCED DEFLECTIONS, TARGET VALIDATION, ESCHERICHIA-COLI, PURPLE MEMBRANE, HYDROXYLAMINE, RESOLUTION, DNA, SPECTROSCOPY|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of)|
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