Rapid melting and revitrification as an approach to microsecond time-resolved cryo-electron microscopy
Jonathan M. Voss, Harder OF, Pavel K. Olshin, Marcel Drabbels, Ulrich J. Lorenz
Abstract
Proteins typically undergo dynamics on the microsecond to millisecond timescale, which is much faster than the time resolution of cryo-electron microscopy. Here, we propose a novel approach for microsecond time-resolved cryo-electron microscopy that involves melting a cryo specimen in situ with a laser beam. The sample remains liquid for the duration of the laser pulse, offering a tunable time window in which the dynamics of embedded particles can be induced in a liquid environment. After the laser pulse, the sample vitrifies, trapping particles in their transient configurations. As a proof of principle, we study the disassembly of particles after they incur structural damage.