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- PDB-9ygf: Cryo-EM structure of L9-11 in complex with Plasmodium falciparum ... -

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Basic information

Entry
Database: PDB / ID: 9ygf
TitleCryo-EM structure of L9-11 in complex with Plasmodium falciparum circumsporozoite protein (PfCSP)
Components
  • (L9-11 Light chain) x 2
  • Circumsporozoite protein
  • L9-11 Heavy chain
KeywordsIMMUNE SYSTEM / Anti-Malarial / PfCSP
Function / homology
Function and homology information


host cell surface binding / symbiont entry into host / entry into host cell by a symbiont-containing vacuole / heparan sulfate proteoglycan binding / side of membrane / cell surface / plasma membrane / cytoplasm
Similarity search - Function
: / Plasmodium circumsporozoite protein / Thrombospondin type 1 domain / Thrombospondin type-1 (TSP1) repeat superfamily / Thrombospondin type-1 (TSP1) repeat profile. / Thrombospondin type 1 repeats / Thrombospondin type-1 (TSP1) repeat
Similarity search - Domain/homology
Circumsporozoite protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Plasmodium falciparum (malaria parasite P. falciparum)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsTripathi, P. / Kwong, P.D.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: To Be Published
Title: Cryo-EM structure of L9-11 in complex with Plasmodium falciparum circumsporozoite protein (PfCSP)
Authors: Tripathi, P. / Kwong, P.D.
History
DepositionSep 28, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 29, 2026Provider: repository / Type: Initial release
Revision 1.0Jul 29, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jul 29, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 29, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 29, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jul 29, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
H: L9-11 Heavy chain
L: L9-11 Light chain
M: L9-11 Heavy chain
N: L9-11 Light chain
O: L9-11 Heavy chain
P: L9-11 Light chain
G: Circumsporozoite protein


Theoretical massNumber of molelcules
Total (without water)118,2087
Polymers118,2087
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Antibody L9-11 Heavy chain


Mass: 13393.948 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody L9-11 Light chain


Mass: 11793.180 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Antibody L9-11 Light chain


Mass: 11763.153 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: Protein Circumsporozoite protein / CS / PfCSP


Mass: 42676.547 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Plasmodium falciparum (isolate 3D7) (eukaryote)
Gene: CSP, PF3D7_0304600 / Production host: Homo sapiens (human) / References: UniProt: Q7K740
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: PfCSP:L9-11 / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Plasmodium falciparum (isolate 3D7) (eukaryote)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1200 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 57.95 e/Å2 / Film or detector model: OTHER

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
2PHENIX1.20_4459model refinement
5cryoSPARCCTF correction
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 72724 / Symmetry type: POINT
RefinementHighest resolution: 3.46 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0035642
ELECTRON MICROSCOPYf_angle_d0.6437649
ELECTRON MICROSCOPYf_dihedral_angle_d4.351774
ELECTRON MICROSCOPYf_chiral_restr0.045804
ELECTRON MICROSCOPYf_plane_restr0.005987

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