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Yorodumi- PDB-8cdd: PfRH5-PfCyRPA-PfRIPR complex from Plasmodium falciparum bound to ... -
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-Basic information
Entry | Database: PDB / ID: 8cdd | ||||||
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Title | PfRH5-PfCyRPA-PfRIPR complex from Plasmodium falciparum bound to antibody Cy.003 | ||||||
Components |
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Keywords | CELL ADHESION / Plasmodium falciparum / erythrocyte-invasion / PfRCR / blood stage malaria vaccine | ||||||
Function / homology | Function and homology information rhoptry lumen / rhoptry / microneme lumen / microneme / symbiont entry into host / host cell membrane / bicellular tight junction / apical part of cell / heparin binding / cytoplasmic vesicle ...rhoptry lumen / rhoptry / microneme lumen / microneme / symbiont entry into host / host cell membrane / bicellular tight junction / apical part of cell / heparin binding / cytoplasmic vesicle / host extracellular space / host cell surface receptor binding / host cell plasma membrane / protein-containing complex / extracellular region / membrane / plasma membrane Similarity search - Function | ||||||
Biological species | Plasmodium falciparum 3D7 (eukaryote) Gallus gallus (chicken) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å | ||||||
Authors | Farrell, B. / Higgins, M.K. | ||||||
Funding support | United Kingdom, 1items
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Citation | Journal: Nature / Year: 2024 Title: The PfRCR complex bridges malaria parasite and erythrocyte during invasion. Authors: Brendan Farrell / Nawsad Alam / Melissa N Hart / Abhishek Jamwal / Robert J Ragotte / Hannah Walters-Morgan / Simon J Draper / Ellen Knuepfer / Matthew K Higgins / Abstract: The symptoms of malaria occur during the blood stage of infection, when parasites invade and replicate within human erythrocytes. The PfPCRCR complex, containing PfRH5 (refs. ), PfCyRPA, PfRIPR, ...The symptoms of malaria occur during the blood stage of infection, when parasites invade and replicate within human erythrocytes. The PfPCRCR complex, containing PfRH5 (refs. ), PfCyRPA, PfRIPR, PfCSS and PfPTRAMP, is essential for erythrocyte invasion by the deadliest human malaria parasite, Plasmodium falciparum. Invasion can be prevented by antibodies or nanobodies against each of these conserved proteins, making them the leading blood-stage malaria vaccine candidates. However, little is known about how PfPCRCR functions during invasion. Here we present the structure of the PfRCR complex, containing PfRH5, PfCyRPA and PfRIPR, determined by cryogenic-electron microscopy. We test the hypothesis that PfRH5 opens to insert into the membrane, instead showing that a rigid, disulfide-locked PfRH5 can mediate efficient erythrocyte invasion. We show, through modelling and an erythrocyte-binding assay, that PfCyRPA-binding antibodies neutralize invasion through a steric mechanism. We determine the structure of PfRIPR, showing that it consists of an ordered, multidomain core flexibly linked to an elongated tail. We also show that the elongated tail of PfRIPR, which is the target of growth-neutralizing antibodies, binds to the PfCSS-PfPTRAMP complex on the parasite membrane. A modular PfRIPR is therefore linked to the merozoite membrane through an elongated tail, and its structured core presents PfCyRPA and PfRH5 to interact with erythrocyte receptors. This provides fresh insight into the molecular mechanism of erythrocyte invasion and opens the way to new approaches in rational vaccine design. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8cdd.cif.gz | 353.9 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8cdd.ent.gz | 272.2 KB | Display | PDB format |
PDBx/mmJSON format | 8cdd.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/cd/8cdd ftp://data.pdbj.org/pub/pdb/validation_reports/cd/8cdd | HTTPS FTP |
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-Related structure data
Related structure data | 16569MC 8cdeC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 124275.094 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Plasmodium falciparum 3D7 (eukaryote) / Gene: RIPR, PFC1045C, PF3D7_0323400 / Production host: Drosophila melanogaster (fruit fly) / References: UniProt: O97302 |
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#2: Protein | Mass: 40184.039 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Plasmodium falciparum 3D7 (eukaryote) / Gene: CyRPA, pfd1130w, PF3D7_0423800 / Production host: Homo sapiens (human) / References: UniProt: Q8IFM8 |
#3: Protein | Mass: 60157.004 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Plasmodium falciparum 3D7 (eukaryote) / Gene: RH5, PFD1145c, PF3D7_0424100 / Production host: Drosophila melanogaster (fruit fly) / References: UniProt: Q8IFM5 |
#4: Protein | Mass: 22083.281 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Gallus gallus (chicken) / Production host: Homo sapiens (human) |
#5: Antibody | Mass: 23362.984 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Gallus gallus (chicken) / Production host: Homo sapiens (human) |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: PfRH5-PfCyRPA-PfRIPR complex bound to Fab fragment from antibody Cy.003 Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: Plasmodium falciparum 3D7 (eukaryote) |
Source (recombinant) | Organism: Homo sapiens (human) |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 3000 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 48.97 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
-Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3D reconstruction | Resolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 500277 / Symmetry type: POINT | ||||||||||||||||||||||||
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