4p1y

Crystal structure of staphylococcal gamma-hemolysin prepore

spinqualitylabelsall models 4p1y, resolution 2.99Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4p1y is a 8 chain structure with sequence from Staphylococcus aureus subsp. aureus Mu50. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.992Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0H3JX61_STAAM Publication Abstract from PubMed Pathogenic bacteria secrete pore-forming toxins (PFTs) to attack target cells. PFTs are expressed as water-soluble monomeric proteins, which oligomerize into nonlytic prepore intermediates on the target cell membrane before forming membrane-spanning pores. Despite a wealth of biochemical data, the lack of high-resolution prepore structural information has hampered understanding of the beta-barrel formation process. Here, we report crystal structures of staphylococcal gamma-haemolysin and leucocidin prepores. The structures reveal a disordered bottom half of the beta-barrel corresponding to the transmembrane region, and a rigid upper extramembrane half. Spectroscopic analysis of fluorescently labelled mutants confirmed that the prepore is distinct from the pore within the transmembrane region. Mutational analysis also indicates a pivotal role for the glycine residue located at the lipid-solvent interface as a 'joint' between the two halves of the beta-barrel. These observations suggest a two-step transmembrane beta-barrel pore formation mechanism in which the upper extramembrane and bottom transmembrane regions are formed independently. Molecular basis of transmembrane beta-barrel formation of staphylococcal pore-forming toxins.,Yamashita D, Sugawara T, Takeshita M, Kaneko J, Kamio Y, Tanaka I, Tanaka Y, Yao M Nat Commun. 2014 Sep 29;5:4897. doi: 10.1038/ncomms5897. PMID:25263813 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Hemolysin 3D structures

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