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  • Title: Three-dimensional structure of the surface layer protein of Aquaspirillum serpens VHA determined by electron crystallography.
    Author: Dickson MR, Downing KH, Wu WH, Glaeser RM.
    Journal: J Bacteriol; 1986 Sep; 167(3):1025-34. PubMed ID: 3745114.
    Abstract:
    The three-dimensional structure of the protein which forms the S layer of Aquaspirillum serpens strain VHA has been determined by electron microscopy. Structures have been reconstructed to a resolution of about 1.6 nm for single-layered specimens and about 4 nm for two-layered specimens. The structure, which has hexagonal symmetry, consists of a core in the shape of a cup, with six projections arising from the rim of the cup to join adjacent subunits at the threefold symmetry axes. The model is consistent with edge views of the S layer which have been obtained in this and other work. It is now clear from this work and from three-dimensional reconstructions of other bacterial S layers that a wide diversity exists in the morphology of surface layers.
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