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  • Title: Trigonal crystals of porin from Escherichia coli.
    Author: Pauptit RA, Zhang H, Rummel G, Schirmer T, Jansonius JN, Rosenbusch JP.
    Journal: J Mol Biol; 1991 Apr 05; 218(3):505-7. PubMed ID: 1850001.
    Abstract:
    Trigonal crystals of the integral membrane protein porin from Escherichia coli have been grown and characterized. They belong to space group P321 with unit cell constants a = b = LL8.4, c = 52.7 A, alpha = beta = 90 degrees, gamma = 120 degrees. The crystals grow as well-defined hexagonal prisms to a size of 0.25 mm in all dimensions, and diffract to 2.7 A. The molecular symmetry coincides with 3-fold crystallographic symmetry, giving two trimers per unit cell (1 monomer/asymmetric unit). This corresponds to VM = 2.9 A3/Da. Native X-ray data to 3.0 A resolution have been collected on a FAST area detector and a search for heavy atom derivatives is underway.
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