High-resolution structure of a membrane protein transferred from amphipol to a lipidic mesophase.

Polovinkin, V.; Mishin, A.; Popov, A.; Kuklin, A.; Round, E.; Chupin, V.; Willbold, D.; Gordeliy, V.; Balandin, T.; Popot, J-L; Shevchenko, Vitaly; Utrobin, P.; Sintsov, M.; Borshchevskiy, V.; Chervakov, P.; Gushchin, I.

doi:10.1007/s00232-014-9700-x

Journal Article

FZJ-2015-00085

High-resolution structure of a membrane protein transferred from amphipol to a lipidic mesophase.

Polovinkin, V. ; Gushchin, I.FZJ* ; Sintsov, M. ; Round, E. ; Balandin, T.FZJ* ; Chervakov, P. ; Shevchenko, V.FZJ* ; Utrobin, P. ; Popov, A. ; Borshchevskiy, V. ; Mishin, A. ; Kuklin, A. ; Willbold, D.FZJ* ; Chupin, V. ; Popot, J.-L. ; Gordeliy, V. (Corresponding Author)FZJ*

2014
Springer New York, NY

The journal of membrane biology 247(9-10), 997 - 1004 (2014) [10.1007/s00232-014-9700-x]

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Please use a persistent id in citations: doi:10.1007/s00232-014-9700-x

Abstract: Amphipols (APols) have become important tools for the stabilization, folding, and in vitro structural and functional studies of membrane proteins (MPs). Direct crystallization of MPs solubilized in APols would be of high importance for structural biology. However, despite considerable efforts, it is still not clear whether MP/APol complexes can form well-ordered crystals suitable for X-ray crystallography. In the present work, we show that an APol-trapped MP can be crystallized in meso. Bacteriorhodopsin (BR) trapped by APol A8-35 was mixed with a lipidic mesophase, and crystallization was induced by adding a precipitant. The crystals diffract beyond 2 Å. The structure of BR was solved to 2 Å and found to be indistinguishable from previous structures obtained after transfer from detergent solutions. We suggest the proposed protocol of in meso crystallization to be generally applicable to APol-trapped MPs.

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