Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer -A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: authors reported there is no experimental evidence

Macromolecule Content

• Total Structure Weight: 49943.60 
• Atom Count: 3569 
• Residue Count: 460 
• Unique protein chains: 3

6BQB

MGG4 Fab in complex with peptide

• DOI: 10.2210/pdb6BQB/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Plasmodium falciparum
• Expression System: Homo sapiens


• Deposited: 2017-11-27 Released: 2018-03-07 
• Deposition Author(s): Oyen, D., Tan, J., Lanzavecchia, A., Wilson, I.A.
• Funding Organization(s): PATH's Malaria Vaccine Initiative 

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.769 Å
• R-Value Free: 0.196 
• R-Value Work: 0.166 

Literature

A public antibody lineage that potently inhibits malaria infection through dual binding to the circumsporozoite protein.

Tan, J., Sack, B.K., Oyen, D., Zenklusen, I., Piccoli, L., Barbieri, S., Foglierini, M., Fregni, C.S., Marcandalli, J., Jongo, S., Abdulla, S., Perez, L., Corradin, G., Varani, L., Sallusto, F., Sim, B.K.L., Hoffman, S.L., Kappe, S.H.I., Daubenberger, C., Wilson, I.A., Lanzavecchia, A.

(2018) Nat. Med. 24: 401-407

• PubMed: 29554084 
• DOI: 10.1038/nm.4513


• PubMed Abstract: 
  

Immunization with attenuated Plasmodium falciparum sporozoites (PfSPZs) has been shown to be protective against malaria, but the features of the antibody response induced by this treatment remain unclear. To investigate this response in detail, we isolated IgM and IgG monoclonal antibodies from Tanzanian volunteers who were immunized with repeated injection of Sanaria PfSPZ Vaccine and who were found to be protected from controlled human malaria infection with infectious homologous PfSPZs. All isolated IgG monoclonal antibodies bound to P. falciparum circumsporozoite protein (PfCSP) and recognized distinct epitopes in its N terminus, NANP-repeat region, and C terminus. Strikingly, the most effective antibodies, as determined in a humanized mouse model, bound not only to the repeat region, but also to a minimal peptide at the PfCSP N-terminal junction that is not in the RTS,S vaccine. These dual-specific antibodies were isolated from different donors and were encoded by VH3-30 or VH3-33 alleles that encode tryptophan or arginine at position 52. Using structural and mutational data, we describe the elements required for germline recognition and affinity maturation. Our study provides potent neutralizing antibodies and relevant information for lineage-targeted vaccine design and immunization strategies.

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Organizational Affiliation: 

Institute for Research in Biomedicine, Università della Svizzera italiana, Bellinzona, Switzerland.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
MGG4 Fab light chain	L	220	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
MGG4 Fab heavy chain	H	224	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
N-terminal junction peptide	P	16	Plasmodium falciparum	Mutation(s): 0
Find proteins for Q7K740 (Plasmodium falciparum) Go to UniProtKB:  Q7K740

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GOL	H, L	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Modified Residues  3 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
NH2	P	NON-POLYMER	H2 N		--
PCA	H	L-PEPTIDE LINKING	C5 H7 N O3		GLU
ACE	P	NON-POLYMER	C2 H4 O		--

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.769 Å
• R-Value Free: 0.196 
• R-Value Work: 0.166 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 55.782	α = 90.00
b = 68.062	β = 90.00
c = 148.610	γ = 90.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
PHENIX	refinement
PHASER	phasing
HKL-2000	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-11-27 
• Released Date: 2018-03-07 
• Deposition Author(s): Oyen, D., Tan, J., Lanzavecchia, A., Wilson, I.A.

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Funding Organization	Location	Grant Number
PATH's Malaria Vaccine Initiative	United States	--

Revision History 

• Version 1.0: 2018-03-07
  Type: Initial release
• Version 1.1: 2018-04-04
  Type: Data collection, Database references
• Version 1.2: 2018-04-25
  Type: Data collection, Database references