Batch crystallization of rhodopsin for structural dynamics using an X-ray free-electron laser
Journal Article
·
· Acta crystallographica. Section F, Structural biology communications
- Paul Scherrer Institute, OFLC/103, 5232 Villigen-PSI (Switzerland)
A new batch preparation method is presented for high-density micrometre-sized crystals of the G protein-coupled receptor rhodopsin for use in time-resolved serial femtosecond crystallography at an X-ray free-electron laser using a liquid jet. Rhodopsin is a membrane protein from the G protein-coupled receptor family. Together with its ligand retinal, it forms the visual pigment responsible for night vision. In order to perform ultrafast dynamics studies, a time-resolved serial femtosecond crystallography method is required owing to the nonreversible activation of rhodopsin. In such an approach, microcrystals in suspension are delivered into the X-ray pulses of an X-ray free-electron laser (XFEL) after a precise photoactivation delay. Here, a millilitre batch production of high-density microcrystals was developed by four methodical conversion steps starting from known vapour-diffusion crystallization protocols: (i) screening the low-salt crystallization conditions preferred for serial crystallography by vapour diffusion, (ii) optimization of batch crystallization, (iii) testing the crystal size and quality using second-harmonic generation (SHG) imaging and X-ray powder diffraction and (iv) production of millilitres of rhodopsin crystal suspension in batches for serial crystallography tests; these crystals diffracted at an XFEL at the Linac Coherent Light Source using a liquid-jet setup.
- OSTI ID:
- 22389083
- Journal Information:
- Acta crystallographica. Section F, Structural biology communications, Journal Name: Acta crystallographica. Section F, Structural biology communications Journal Issue: Pt 7 Vol. 71; ISSN ACSFEN; ISSN 2053-230X
- Country of Publication:
- United States
- Language:
- English
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