9YGF | pdb_00009ygf

Cryo-EM structure of L9-11 in complex with Plasmodium falciparum circumsporozoite protein (PfCSP)

• PDB DOI: https://doi.org/10.2210/pdb9YGF/pdb
• EM Map EMD-72922: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens, Plasmodium falciparum 3D7
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-09-28 Released: 2026-07-29 
• Deposition Author(s): Tripathi, P., Kwong, P.D.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.46 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of L9-11 in complex with Plasmodium falciparum circumsporozoite protein (PfCSP)

Tripathi, P., Kwong, P.D.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 7-mer - A3B3C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 7-mer - A6B1 Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 3-mer - B3 

Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 3-mer - B3 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 118.21 kDa 
• Atom Count: 5,501 
• Modeled Residue Count: 706 
• Deposited Residue Count: 1,078 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
L9-11 Heavy chain	A [auth H], C [auth M], E [auth O]	120	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
L9-11 Light chain	B [auth L], F [auth P]	107	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
L9-11 Light chain	D [auth N]	107	Homo sapiens	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Circumsporozoite protein	G	397	Plasmodium falciparum 3D7	Mutation(s): 0  Gene Names: CSP, PF3D7_0304600
UniProt
Find proteins for Q7K740 (Plasmodium falciparum (isolate 3D7)) Explore Q7K740  Go to UniProtKB:  Q7K740

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.46 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20_4459
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-07-29 
Deposition Author(s): Tripathi, P., Kwong, P.D.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	--

Revision History  

• Version 1.0: 2026-07-29
  Type: Initial release