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Function of the bacteriophage P2 baseplate central spike Apex domain in the infection process

biorxiv. 2023-02; 
John-Mark Miller, Ekaterina S Knyazhanskaya, Sergii A Buth, Nikolai S Prokhorov, Petr G Leiman
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Proteins, Expression, Isolation and Analysis … (Enzo Life Sciences, ADI-SPS-875-D), OmpF antibody (orb308741, Biorbyt) and a custom made anti-P2 gpV polyclonal antibody generated by GenScript. The secondary antibodies … Get A Quote

摘要

The contractile tail of bacteriophage P2 functions to drive the tail tube across the outer membrane of its host bacterium, a prerequisite event for subsequent translocation of phage genomic DNA into the host cell. The tube is equipped with a spike-shaped protein (product of P2 gene , gpV or Spike) that contains a membrane-attacking Apex domain carrying a centrally positioned Fe ion. The ion is enclosed in a histidine cage that is formed by three symmetry-related copies of a conserved HxH (histidine, any residue, histidine) sequence motif. Here, we used solution biophysics and X-ray crystallography to characterize the structure and properties of Spike mutants in which the Apex domain was either deleted or its h... More

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