Abstract
Lipidic cubic phases (LCPs) have emerged as successful matrixes for the crystallization of membrane proteins. Moreover, the viscous LCP also provides a highly effective delivery medium for serial femtosecond crystallography (SFX) at X-ray free-electron lasers (XFELs). Here, the adaptation of this technology to perform serial millisecond crystallography (SMX) at more widely available synchrotron microfocus beamlines is described. Compared with conventional microcrystallography, LCP-SMX eliminates the need for difficult handling of individual crystals and allows for data collection at room temperature. The technology is demonstrated by solving a structure of the light-driven proton-pump bacteriorhodopsin (bR) at a resolution of 2.4±Å. The room-temperature structure of bR is very similar to previous cryogenic structures but shows small yet distinct differences in the retinal ligand and proton-transfer pathway.
Original language | English (US) |
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Pages (from-to) | 168-176 |
Number of pages | 9 |
Journal | IUCrJ |
Volume | 2 |
DOIs | |
State | Published - Feb 26 2015 |
Keywords
- XFEL
- bacteriorhodopsin
- lipidic cubic phases
- protein crystallography
ASJC Scopus subject areas
- Chemistry(all)
- Biochemistry
- Materials Science(all)
- Condensed Matter Physics