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  • Title: Crystal structure of P22 tailspike protein: interdigitated subunits in a thermostable trimer.
    Author: Steinbacher S, Seckler R, Miller S, Steipe B, Huber R, Reinemer P.
    Journal: Science; 1994 Jul 15; 265(5170):383-6. PubMed ID: 8023158.
    Abstract:
    The tailspike protein (TSP) of Salmonella typhimurium phage P22 is a part of the apparatus by which the phage attaches to the bacterial host and hydrolyzes the O antigen. It has served as a model system for genetic and biochemical analysis of protein folding. The x-ray structure of a shortened TSP (residues 109 to 666) was determined to a 2.0 angstrom resolution. Each subunit of the homotrimer contains a large parallel beta helix. The interdigitation of the polypeptide chains at the carboxyl termini is important to protrimer formation in the folding pathway and to thermostability of the mature protein.
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