8ULF | pdb_00008ulf

Crystal structure of Plasmodium vivax CelTOS in complex with antibody 7g7

• PDB DOI: https://doi.org/10.2210/pdb8ULF/pdb

• Classification: CELL INVASION
• Organism(s): Plasmodium vivax, Mus musculus
• Expression System: Escherichia coli, Homo sapiens
• Mutation(s): No 


• Deposited: 2023-10-16 Released: 2024-09-11 
• Deposition Author(s): Tang, W.K., Tolia, N.H.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 
  0.295 (Depositor), 0.310 (DCC) 
• R-Value Work: 
  0.275 (Depositor), 0.279 (DCC) 
• R-Value Observed: 
  0.278 (Depositor) 

Starting Models: experimental

Literature

Multistage protective anti-CelTOS monoclonal antibodies with cross-species sterile protection against malaria.

Tang, W.K., Salinas, N.D., Kolli, S.K., Xu, S., Urusova, D.V., Kumar, H., Jimah, J.R., Subramani, P.A., Ogbondah, M.M., Barnes, S.J., Adams, J.H., Tolia, N.H.

(2024) Nat Commun 15: 7487-7487

• PubMed: 39209843 
• DOI: https://doi.org/10.1038/s41467-024-51701-2
• Primary Citation Related Structures: 
  8UKH, 8ULF


• PubMed Abstract: 
  

  CelTOS is a malaria vaccine antigen that is conserved in Plasmodium and other apicomplexan parasites and plays a role in cell-traversal. The structural basis and mechanisms of CelTOS-induced protective immunity to parasites are unknown. Here, CelTOS-specific monoclonal antibodies (mAbs) 7g7 and 4h12 demonstrated multistage activity, protecting against liver infection and preventing parasite transmission to mosquitoes. Both mAbs demonstrated cross-species activity with sterile protection against in vivo challenge with transgenic parasites containing either P. falciparum or P. vivax CelTOS, and with transmission reducing activity against P. falciparum. The mAbs prevented CelTOS-mediated pore formation providing insight into the protective mechanisms. X-ray crystallography and mutant-library epitope mapping revealed two distinct broadly conserved neutralizing epitopes. 7g7 bound to a parallel dimer of CelTOS, while 4h12 bound to a novel antiparallel dimer architecture. These findings inform the design of antibody therapies and vaccines and raise the prospect of a single intervention to simultaneously combat P. falciparum and P. vivax malaria.

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Organizational Affiliation: 
• Host‒Pathogen Interactions and Structural Vaccinology Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Center of Global Health and Interdisciplinary Research, College of Public Health, University of South Florida, Tampa, FL, USA.
Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA.
Department of Molecular Biology, Princeton University, Princeton, NJ, USA.
Host‒Pathogen Interactions and Structural Vaccinology Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 282.5 kDa 
• Atom Count: 16,912 
• Modeled Residue Count: 2,208 
• Deposited Residue Count: 2,584 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Pv cell-traversal protein	A, D [auth B], G [auth C], J [auth D]	171	Plasmodium vivax	Mutation(s): 0  Gene Names: pvCelTOS
UniProt
Find proteins for Q53UB7 (Plasmodium vivax) Explore Q53UB7  Go to UniProtKB:  Q53UB7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
7g7 heavy chain	B [auth H], E [auth I], H [auth J], K	240	Mus musculus	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
7g7 light chain	C [auth L], F [auth M], I [auth N], L [auth O]	235	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NA	M [auth A], N [auth B], O [auth C], P [auth D]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free:  0.295 (Depositor), 0.310 (DCC) 
• R-Value Work:  0.275 (Depositor), 0.279 (DCC) 
• R-Value Observed: 0.278 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 182.89	α = 90.03
b = 78.62	β = 95.37
c = 47.32	γ = 89.88

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2024-09-11 
Deposition Author(s): Tang, W.K., Tolia, N.H.

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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: 2024-09-11
  Type: Initial release
  
• Version 1.1: 2024-11-13
  Changes: Structure summary