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- W2329480227 abstract "Myosin is a mechano-enzyme that hydrolyzes ATP in order to move unidirectionally along actin filaments. Here we show by single molecule imaging that myosin V motion can be activated by local heat. We constructed a dark-field microscopy that included optical tweezers to monitor 80 nm gold nanoparticles (GNP) bound to single myosin V molecules with nanometer and submillisecond accuracy. We observed 34 nm processive steps along actin filaments like those seen when using 200 nm polystyrene beads (PB) but dwell times (ATPase activity) that were 4.5 times faster. Further, by using DNA nanotechnology (DNA origami) and myosin V as a nanometric thermometer, the temperature gradient surrounding optically trapped GNP could be estimated with nanometer accuracy. We propose our single molecule measurement system should advance quantitative analysis of the thermal control of biological and artificial systems like nanoscale thermal ratchet motors." @default.
- W2329480227 created "2016-06-24" @default.
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- W2329480227 date "2015-03-05" @default.
- W2329480227 modified "2023-09-30" @default.
- W2329480227 title "Local Heat Activation of Single Myosins Based on Optical Trapping of Gold Nanoparticles" @default.
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- W2329480227 doi "https://doi.org/10.1021/nl5049059" @default.
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