6bpc

Plasmodium vivax reticulocyte binding protein 2b (PvRBP2b) bound to monoclonal antibody 4F7

spinqualitylabelsall models 6bpc, resolution 2.66Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6bpc is a 6 chain structure with sequence from Mus musculus and Plasmodium vivax Sal-1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.66Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A5K736_PLAVS Publication Abstract from PubMed Plasmodium vivax is the most widely distributed malaria parasite that infects humans(1). P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. vivax reticulocyte-binding protein 2b (PvRBP2b) and transferrin receptor 1 (TfR1)(2). TfR1-deficient erythroid cells are refractory to invasion by P. vivax, and anti-PvRBP2b monoclonal antibodies inhibit reticulocyte binding and block P. vivax invasion in field isolates(2). Here we report a high-resolution cryo-electron microscopy structure of a ternary complex of PvRBP2b bound to human TfR1 and transferrin, at 3.7 A resolution. Mutational analyses show that PvRBP2b residues involved in complex formation are conserved; this suggests that antigens could be designed that act across P. vivax strains. Functional analyses of TfR1 highlight how P. vivax hijacks TfR1, an essential housekeeping protein, by binding to sites that govern host specificity, without affecting its cellular function of transporting iron. Crystal and solution structures of PvRBP2b in complex with antibody fragments characterize the inhibitory epitopes. Our results establish a structural framework for understanding how P. vivax reticulocyte-binding protein engages its receptor and the molecular mechanism of inhibitory monoclonal antibodies, providing important information for the design of novel vaccine candidates. Cryo-EM structure of an essential Plasmodium vivax invasion complex.,Gruszczyk J, Huang RK, Chan LJ, Menant S, Hong C, Murphy JM, Mok YF, Griffin MDW, Pearson RD, Wong W, Cowman AF, Yu Z, Tham WH Nature. 2018 Jul;559(7712):135-139. doi: 10.1038/s41586-018-0249-1. Epub 2018 Jun, 27. PMID:29950717 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Monoclonal Antibodies 3D structures

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