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  • Title: Crystallization and preliminary X-ray diffraction analysis of 11 S acetylcholinesterase.
    Author: Schrag JD, Schmid MF, Morgan DG, Phillips GN, Chiu W, Tang L.
    Journal: J Biol Chem; 1988 Jul 15; 263(20):9795-800. PubMed ID: 3384821.
    Abstract:
    The 11 S form of acetylcholinesterase from Electrophorus electricus was purified by affinity chromatography. The protein was crystallized from polyethylene glycol solutions. One crystal form proved suitable for x-ray diffraction studies. Preliminary x-ray analysis demonstrates that the space group of this crystal is F222. The unit cell dimensions are a = 141.0 +/- 0.2, b = 202.4 +/- 0.2, and c = 237.4 +/- 0.1 A. The diffraction is anisotropic, extending to at least 3.5 A along the a* and b* axes, but becoming weak beyond about 6 A along the c* axis. Crystal density measurements suggest that one complete 11 S tetramer occupies the asymmetric unit of the crystal.
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