A multicrystal diffraction data-collection approach for studying structural dynamics with millisecond temporal resolution.Schubert, R., Kapis, S., Gicquel, Y., Bourenkov, G., Schneider, T.R., Heymann, M., Betzel, C., Perbandt, M.
(2016) IUCrJ 3: 393-401
- PubMed: 27840678
- DOI: 10.1107/S2052252516016304
- Primary Citation of Related Structures:
- PubMed Abstract:
Many biochemical processes take place on timescales ranging from femto-seconds to seconds. Accordingly, any time-resolved experiment must be matched to the speed of the structural changes of interest. Therefore, the timescale of interest defines the ...
Many biochemical processes take place on timescales ranging from femto-seconds to seconds. Accordingly, any time-resolved experiment must be matched to the speed of the structural changes of interest. Therefore, the timescale of interest defines the requirements of the X-ray source, instrumentation and data-collection strategy. In this study, a minimalistic approach for in situ crystallization is presented that requires only a few microlitres of sample solution containing a few hundred crystals. It is demonstrated that complete diffraction data sets, merged from multiple crystals, can be recorded within only a few minutes of beamtime and allow high-resolution structural information of high quality to be obtained with a temporal resolution of 40 ms. Global and site-specific radiation damage can be avoided by limiting the maximal dose per crystal to 400 kGy. Moreover, analysis of the data collected at higher doses allows the time-resolved observation of site-specific radiation damage. Therefore, our approach is well suited to observe structural changes and possibly enzymatic reactions in the low-millisecond regime.
University of Hamburg c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging c/o DESY, Luruper Chaussee 149, 22761 Hamburg, Germany.