3aqj
From Proteopedia
Crystal Structure of a C-terminal domain of the bacteriophage P2 tail spike protein, gpV
Structural highlights
FunctionSPIKE_BPP2 Forms the small spikes on the baseplate that plug the end of the tube before DNA ejection and form a channel perforating the host membrane during ejection. Involved in baseplate assembly.[1] [2] Publication Abstract from PubMedThe adsorption and infection of bacteriophage P2 is mediated by tail fibres and tail spikes. The tail spikes on the tail baseplate are used to irreversibly adsorb to the host cells. Recently, a P2 phage tail-spike protein, gpV, was purified and it was shown that a C-terminal domain, Ser87-Leu211, is sufficient for the binding of gpV to host Escherichia coli membranes [Kageyama et al. (2009), Biochemistry, 48, 10129-10135]. In this paper, the crystal structure of the C-terminal domain of P2 gpV is reported. The structure is a triangular pyramid and looks like a spearhead composed of an intertwined beta-sheet, a triple beta-helix and a metal-binding region containing iron, calcium and chloride ions. The host-binding domain of the P2 phage tail spike reveals a trimeric iron-binding structure.,Yamashita E, Nakagawa A, Takahashi J, Tsunoda K, Yamada S, Takeda S Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Aug 1;67(Pt 8):837-41., Epub 2011 Jul 13. PMID:21821878[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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