Conformational dynamics of a single protein monitored for 24 hours at video rate

We use plasmon rulers to follow the conformational dynamics of a single protein for up to 24 h at a video rate. The plasmon ruler consists of two gold nanospheres connected by a single protein linker. In our experiment, we follow the dynamics of the molecular chaperone heat shock protein 90, which is known to show open and closed conformations. Our measurements confirm the previously known conformational dynamics with transition times in the second to minute time scale and reveals new dynamics on the time scale of minutes to hours. Plasmon rulers thus extend the observation bandwidth 3/4 orders of magnitude with respect to single-molecule fluorescence resonance energy transfer and enable the study of molecular dynamics with unprecedented precision

METHOD FOR DETECTING AND/OR QUANTIFYING THE BINDING AFFINITIES OF A TARGET MOLECULE TO A PLURALITY OF DIFFERENT BINDING PARTNERS BY PLASMON RESONANCE OF NANOPARTICLES AND A POSITION-ENCODED SENSOR THEREFORE

Depto. de Química FísicaFac. de Ciencias Químicaspu

Alivisatos. Controlled synthesis of hyper-branched inorganic nanocrystals with rich three-dimentional structures. Nano Lett

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