Abstract
The crystallization of a given protein is a hard task being even more complicated when the protein shows a hydrophobic behavior. In the case of photosynthetic proteins, the difficulty of the experiments increased due to the high light sensitivity. Aqueous solutions of photosystem II core complex (OEC PSII) of Pisum sativum were screened for crystallization conditions using standard crystallization methods. Crystal improvement was achieved by counter-diffusion technique in single capillaries of 0.2 mm inner diameter with a three-layer configuration. The use of this advanced crystallization technique—for the first time applied to the crystallization of membrane proteins—improves the reproducibility of the experiments allowing the initial crystal characterization, and facilitates the manipulation under light protection.
Abbreviations
- OEC PSII:
-
Oxygen-evolving complex of photosystem II or photosystem II core complex
- PSII:
-
Photosystem II
- MPDB:
-
Membrane protein data bank
- Fe :
-
Iron
- Mn :
-
Manganese
- Chla :
-
Chlorophyll a
- PEG4000 :
-
Polyethylenglycol Mr 4000
- Bis–Tris :
-
Bis(2-hydroxyethyl)iminotris(hydroxymethyl)methane
- MES :
-
2-(N-morpholino)ethanesulfonic acid
- MPD :
-
2-Methyl-2,4-pentanediol
- DM:
-
n-dodecyl-β-D-maltoside
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Acknowledgments
This work is supported by the Grant Agency of the Czech Republic (206/03/D061), by the joint CSIC and AS CR projects 2003CZ0013 and 2004CZ0003, by the Ministry of Education of the Czech Republic (MSM6007665808, LC06010) and by the Academy of Sciences of the Czech Republic (AV0Z60870520, AV0Z50510513). We also acknowledge Junta de Andalucía (Spain) for financial support through the project Excelencia (RNM1344) and support to JAG. IKS thanks to Marie Šáchová and Ivana Hunalová for protein sample preparation. We are grateful to X13, BM16 and ID14-1 staff for the support during data collection.
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Kutá Smatanová, I., Gavira, J.A., Řezáčová, P. et al. New techniques for membrane protein crystallization tested on photosystem II core complex of Pisum sativum . Photosynth Res 90, 255–259 (2006). https://doi.org/10.1007/s11120-007-9131-y
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DOI: https://doi.org/10.1007/s11120-007-9131-y