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  • Title: The structure of a T = 1 icosahedral empty particle from southern bean mosaic virus.
    Author: Erickson JW, Silva AM, Murthy MR, Fita I, Rossmann MG.
    Journal: Science; 1985 Aug 16; 229(4714):625-9. PubMed ID: 4023701.
    Abstract:
    The structure of a T = 1 icosahedral particle (where T is the triangulation number), assembled from southern bean mosaic virus coat protein fragments that lacked the amino-terminal arm, was solved by means of model building procedures with the use of 6-angstrom resolution x-ray diffraction data. The icosahedral five-, three-, and twofold contacts were found to be similar, at this resolution, to the analogous contacts (icosahedral five-, quasi-three-, and quasi-twofolds) found in the parent T = 3 southern bean mosaic virus. However, the icosahedral fivefold contacts of the T = 3 structure are the most conserved in the T = 1 capsid. These results are consistent with a mechanism in which pentameric caps of dimers are the building blocks for the assembly of T = 1 and T = 3 icosahedral viruses.
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