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- Title
X-ray structure of bacteriorhodopsin at 2.5 angstroms from microcrystals grown in lipidic cubic phases.
- Authors
Pebay-Peyroula, E; Rummel, G; Rosenbusch, J P; Landau, E M
- Abstract
Lipidic cubic phases provide a continuous three-dimensional bilayer matrix that facilitates nucleation and growth of bacteriorhodopsin microcrystals. The crystals diffract x-rays isotropically to 2.0 angstroms. The structure of this light-driven proton pump was solved at a resolution of 2.5 angstroms by molecular replacement, using previous results from electron crystallographic studies as a model. The earlier structure was generally confirmed, but several differences were found, including loop conformations and side chain residues. Eight water molecules are now identified experimentally in the proton pathway. These findings reveal the constituents of the proton translocation pathway in the ground state.
- Publication
Science (New York, N.Y.), 1997, Vol 277, Issue 5332, p1676
- ISSN
0036-8075
- Publication type
Journal Article
- DOI
10.1126/science.277.5332.1676