Christopher Kupitz

TL;DR: Serial femtosecond crystallography (SFX) is applied using an x-ray free-electron laser (XFEL) to obtain high-resolution structural information from microcrystals of the well-characterized model protein lysozyme, demonstrating the immediate relevance of SFX for analyzing the structure of the large group of difficult-to-crystallize molecules.

TL;DR: The crystal structure of a constitutively active form of human rhodopsin bound to a pre-activated form of the mouse visual arrestin is determined by serial femtosecond X-ray laser crystallography and provides a basis for understanding GPCR-mediated arrestin-biased signalling.

TL;DR: This work presents a technique for extruding gel-like LCP with embedded membrane protein microcrystals, providing a continuously renewed source of material for serial femtosecond crystallography.

TL;DR: Time resolved experiments on PSII nano/microcrystals from Thermosynechococcus elongatus performed with the recently developed technique of serial femtosecond crystallography provide evidence that PSII undergoes significant conformational changes at the electron acceptor side and at the Mn4CaO5 core of the OEC.

TL;DR: This work used microcrystals of photoactive yellow protein as a model system and obtained high-resolution, time-resolved difference electron density maps of excellent quality with strong features, which open the way to the study of reversible and nonreversible biological reactions on time scales as short as femtoseconds under conditions that maximize the extent of reaction initiation throughout the crystal.