+Open data
-Basic information
Entry | Database: PDB / ID: 8c44 | |||||||||
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Title | HB3VAR03 apo headstructure (PfEMP1 A) complexed with EPCR | |||||||||
Components |
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Keywords | CELL ADHESION / Plasmodium falciparum / Cerebral Malaria / PfEMP1 / EPCR | |||||||||
Function / homology | Function and homology information negative regulation of coagulation / Common Pathway of Fibrin Clot Formation / Cell surface interactions at the vascular wall / blood coagulation / signaling receptor activity / host cell surface receptor binding / focal adhesion / centrosome / perinuclear region of cytoplasm / cell surface ...negative regulation of coagulation / Common Pathway of Fibrin Clot Formation / Cell surface interactions at the vascular wall / blood coagulation / signaling receptor activity / host cell surface receptor binding / focal adhesion / centrosome / perinuclear region of cytoplasm / cell surface / extracellular space / extracellular exosome / extracellular region / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | Plasmodium falciparum HB3 (eukaryote) Homo sapiens (human) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Raghavan, S.S.R. / Lavstsen, T. / Wang, K.T. | |||||||||
Funding support | Denmark, 2items
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Citation | Journal: Structure / Year: 2023 Title: Endothelial protein C receptor binding induces conformational changes to severe malaria-associated group A PfEMP1. Authors: Sai Sundar Rajan Raghavan / Louise Turner / Rasmus W Jensen / Nicolai Tidemand Johansen / Daniel Skjold Jensen / Pontus Gourdon / Jinqiu Zhang / Yong Wang / Thor Grundtvig Theander / Kaituo ...Authors: Sai Sundar Rajan Raghavan / Louise Turner / Rasmus W Jensen / Nicolai Tidemand Johansen / Daniel Skjold Jensen / Pontus Gourdon / Jinqiu Zhang / Yong Wang / Thor Grundtvig Theander / Kaituo Wang / Thomas Lavstsen / Abstract: Severe Plasmodium falciparum malaria infections are caused by microvascular sequestration of parasites binding to the human endothelial protein C receptor (EPCR) via the multi-domain P. falciparum ...Severe Plasmodium falciparum malaria infections are caused by microvascular sequestration of parasites binding to the human endothelial protein C receptor (EPCR) via the multi-domain P. falciparum erythrocyte membrane protein 1 (PfEMP1) adhesion ligands. Using cryogenic electron microscopy (Cryo-EM) and PfEMP1 sequence diversity analysis, we found that group A PfEMP1 CIDRα1 domains interact with the adjacent DBLα1 domain through central, conserved residues of the EPCR-binding site to adopt a compact conformation. Upon EPCR binding, the DBLα1 domain is displaced, and the EPCR-binding helix of CIDRα1 is turned, kinked, and twisted to reach a rearranged, stable EPCR-bound conformation. The unbound conformation and the required transition to the EPCR-bound conformation may represent a conformational masking mechanism of immune evasion for the PfEMP1 family. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8c44.cif.gz | 161 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8c44.ent.gz | 114 KB | Display | PDB format |
PDBx/mmJSON format | 8c44.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 8c44_validation.pdf.gz | 1.1 MB | Display | wwPDB validaton report |
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Full document | 8c44_full_validation.pdf.gz | 1.1 MB | Display | |
Data in XML | 8c44_validation.xml.gz | 41.3 KB | Display | |
Data in CIF | 8c44_validation.cif.gz | 59.2 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/c4/8c44 ftp://data.pdbj.org/pub/pdb/validation_reports/c4/8c44 | HTTPS FTP |
-Related structure data
Related structure data | 16416MC 8c3yC 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: 145158.766 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Plasmodium falciparum HB3 (eukaryote) / Gene: PFHG_05052 / Production host: Spodoptera frugiperda granulovirus / References: UniProt: A0A0L7KL67 |
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#2: Protein | Mass: 19471.928 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PROCR, EPCR / Production host: Spodoptera frugiperda granulovirus / References: UniProt: Q9UNN8 |
#3: Chemical | ChemComp-PTY / |
#4: Sugar | ChemComp-NAG / |
Has ligand of interest | Y |
-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: Multidomain PFEMP1 A complexed with EPCR / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Molecular weight | Value: 0.175 MDa / Experimental value: YES |
Source (natural) | Organism: Plasmodium falciparum HB3 (eukaryote) |
Source (recombinant) | Organism: Spodoptera frugiperda granulovirus |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 0.7 mg/ml / 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: OTHER |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 1200 nm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.18.2_3874: / Classification: refinement | ||||||||||||||||||||||||
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EM software | Name: cryoSPARC / Version: 3.3 / Category: image acquisition | ||||||||||||||||||||||||
CTF correction | Type: NONE | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 505000 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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