3STO

Serpin from the trematode Schistosoma Haematobium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Three-dimensional structure of a schistosome serpin revealing an unusual configuration of the helical subdomain.

Granzin, J.Huang, Y.Topbas, C.Huang, W.Wu, Z.Misra, S.Hazen, S.L.Blanton, R.E.Lee, X.Weiergraber, O.H.

(2012) Acta Crystallogr D Biol Crystallogr 68: 686-694

  • DOI: 10.1107/S0907444912008372
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Parasitic organisms are constantly challenged by the defence mechanisms of their respective hosts, which often depend on serine protease activities. Consequently, protease inhibitors such as those belonging to the serpin superfamily have emerged as p ...

    Parasitic organisms are constantly challenged by the defence mechanisms of their respective hosts, which often depend on serine protease activities. Consequently, protease inhibitors such as those belonging to the serpin superfamily have emerged as protective elements that support the survival of the parasites. This report describes the crystal structure of ShSPI, a serpin from the trematode Schistosoma haematobium. The protein is exposed on the surface of invading cercaria as well as of adult worms, suggesting its involvement in the parasite-host interaction. While generally conforming to the well established serpin fold, the structure reveals several distinctive features, mostly concerning the helical subdomain of the protein. It is proposed that these peculiarities are related to the unique biological properties of a small serpin subfamily which is conserved among pathogenic schistosomes.


    Organizational Affiliation

    Institute of Complex Systems, ICS-6: Structural Biochemistry, Forschungszentrum Jülich, 52425 Jülich, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine protease inhibitor
A
406Schistosoma haematobiumMutation(s): 0 
Find proteins for Q26502 (Schistosoma haematobium)
Go to UniProtKB:  Q26502
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.913α = 90
b = 64.913β = 90
c = 187.004γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
SHELXDphasing
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2013-01-23
    Changes: Database references