1B9W | pdb_00001b9w

C-TERMINAL MEROZOITE SURFACE PROTEIN 1 FROM PLASMODIUM CYNOMOLGI

• PDB DOI: https://doi.org/10.2210/pdb1B9W/pdb

• Classification: SURFACE PROTEIN
• Organism(s): Plasmodium cynomolgi
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 1999-02-15 Released: 1999-05-24 
• Deposition Author(s): Bentley, G.A., Chitarra, V., Holm, I., Longacre, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.279 (Depositor), 0.223 (DCC) 
• R-Value Work: 
  0.212 (Depositor), 0.181 (DCC) 

Literature

The crystal structure of C-terminal merozoite surface protein 1 at 1.8 A resolution, a highly protective malaria vaccine candidate.

Chitarra, V., Holm, I., Bentley, G.A., Petres, S., Longacre, S.

(1999) Mol Cell 3: 457-464

• PubMed: 10230398 
• DOI: https://doi.org/10.1016/s1097-2765(00)80473-6
• Primary Citation Related Structures: 
  1B9W


• PubMed Abstract: 
  

  The C-terminal proteolytic processing product of merozoite surface protein 1 (MSP1) appears essential for successful erythrocyte invasion by the malarial parasite, Plasmodium. We have determined the crystal structure at 1.8 A resolution of a soluble baculovirus-recombinant form of the protein from P. cynomolgi, which confers excellent protective efficacy in primate vaccination trials. The structure comprises two EGF-like domains, and sequence comparisons strongly suggest that the same conformation is present in all species of Plasmodium, including P. falciparum and P. vivax, which are pathogenic in man. In particular, conserved interdomain contacts between the two EGF modules should preserve the compact form of the molecule in all species. Implications of the crystal structure for anti-malarial vaccine development are discussed.

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Organizational Affiliation: 
• Unité d'Immunologie Structurale (CNRS URA 1961), Institut Pasteur, Paris, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 10.8 kDa 
• Atom Count: 766 
• Modeled Residue Count: 91 
• Deposited Residue Count: 95 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (MEROZOITE SURFACE PROTEIN 1)	A	95	Plasmodium cynomolgi	Mutation(s): 0
UniProt
Find proteins for Q25659 (Plasmodium cynomolgi) Explore Q25659  Go to UniProtKB:  Q25659

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.279 (Depositor), 0.223 (DCC) 
• R-Value Work:  0.212 (Depositor), 0.181 (DCC) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.77	α = 90
b = 43.77	β = 90
c = 92.04	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-05-24 
Deposition Author(s): Bentley, G.A., Chitarra, V., Holm, I., Longacre, S.

Revision History  

• Version 1.0: 1999-05-24
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-27
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-10-09
  Changes: Structure summary