8fdc

Crystal structure of Ky311 Fab in complex with circumsporozoite protein KQPA peptide

spinqualitylabelsall models 8fdc, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8fdc is a 3 chain structure with sequence from Mus musculus and Plasmodium falciparum NF54. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: EDO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CSP_PLAFO The circumsporozoite protein is the immunodominant surface antigen on the sporozoite (the infective stage of the malaria parasite that is transmitted from the mosquito to the vertebrate host). Publication Abstract from PubMed IGHV3-33-encoded antibodies are prevalent in the human humoral response against the Plasmodium falciparum circumsporozoite protein (PfCSP). Among VH3-33 antibodies, cross-reactivity between PfCSP major repeat (NANP), minor (NVDP), and junctional (NPDP) motifs is associated with high affinity and potent parasite inhibition. However, the molecular basis of antibody cross-reactivity and the relationship with efficacy remain unresolved. Here, we perform an extensive structure-function characterization of 12 VH3-33 anti-PfCSP monoclonal antibodies (mAbs) with varying degrees of cross-reactivity induced by immunization of mice expressing a human immunoglobulin gene repertoire. We identify residues in the antibody paratope that mediate cross-reactive binding and delineate four distinct epitope conformations induced by antibody binding, with one consistently associated with high protective efficacy and another that confers comparably potent inhibition of parasite liver invasion. Our data show a link between molecular features of cross-reactive VH3-33 mAb binding to PfCSP and mAb potency, relevant for the development of antibody-based interventions against malaria. Molecular determinants of cross-reactivity and potency by VH3-33 antibodies against the Plasmodium falciparum circumsporozoite protein.,Thai E, Murugan R, Binter S, Burn Aschner C, Prieto K, Kassardjian A, Obraztsova AS, Kang RW, Flores-Garcia Y, Mathis-Torres S, Li K, Horn GQ, Huntwork RHC, Bolscher JM, de Bruijni MHC, Sauerwein R, Dennison SM, Tomaras GD, Zavala F, Kellam P, Wardemann H, Julien JP Cell Rep. 2023 Nov 28;42(11):113330. doi: 10.1016/j.celrep.2023.113330. Epub 2023 , Oct 28. PMID:38007690 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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