3TGH

GAP50 the anchor in the inner membrane complex of Plasmodium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of GAP50, the anchor of the invasion machinery in the inner membrane complex of Plasmodium falciparum.

Bosch, J.Paige, M.H.Vaidya, A.B.Bergman, L.W.Hol, W.G.

(2012) J Struct Biol 178: 61-73

  • DOI: https://doi.org/10.1016/j.jsb.2012.02.009
  • Primary Citation of Related Structures:  
    3TGH

  • PubMed Abstract: 

    The glideosome associated protein GAP50 is an essential protein in apicomplexan parasites such as Plasmodium, Toxoplasma and Cryptosporidium, several species of which are important human pathogens. The 44.6kDa protein is part of a multi-protein complex known as the invasion machinery or glideosome, which is required for cell invasion and substrate gliding motility empowered by an actin-myosin motor. GAP50 is anchored through its C-terminal transmembrane helix into the inner membrane complex and interacts via a short six residue C-terminal tail with other proteins of the invasion machinery in the pellicle of the parasite. In this paper we describe the 1.7Å resolution crystal structure of the soluble GAP50 domain from the malaria parasite Plasmodium falciparum. The structure shows an αßßα fold with overall similarity to purple acid phosphatases with, however, little homology regarding the nature of the residues in the active site region of the latter enzyme. While purple acid phosphatases contain a phosphate bridged binuclear Fe-site coordinated by seven side chains with the Fe-ions 3.2Å apart, GAP50 in our crystals contains two cobalt ions each with one protein ligand and a distance between the Co(2+) ions of 18Å.


  • Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glideosome-associated protein 50342Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: GAP50PFI0880c
EC: 3.1.3.2
Membrane Entity: Yes 
UniProt
Find proteins for Q8I2X3 (Plasmodium falciparum (isolate 3D7))
Explore Q8I2X3 
Go to UniProtKB:  Q8I2X3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8I2X3
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.648α = 90
b = 57.648β = 90
c = 210.625γ = 120
Software Package:
Software NamePurpose
XDSdata scaling
MOLREPphasing
REFMACrefinement
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-07
    Type: Initial release
  • Version 1.1: 2012-04-25
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description