3PNR

Structure of PbICP-C in complex with falcipain-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis for the regulation of cysteine-protease activity by a new class of protease inhibitors in Plasmodium.

Hansen, G.Heitmann, A.Witt, T.Li, H.Jiang, H.Shen, X.Heussler, V.T.Rennenberg, A.Hilgenfeld, R.

(2011) Structure 19: 919-929

  • DOI: 10.1016/j.str.2011.03.025
  • Primary Citation of Related Structures:  
    3PNR

  • PubMed Abstract: 
  • Plasmodium cysteine proteases are essential for host-cell invasion and egress, hemoglobin degradation, and intracellular development of the parasite. The temporal, site-specific regulation of cysteine-protease activity is a prerequisite for survival and propagation of Plasmodium ...

    Plasmodium cysteine proteases are essential for host-cell invasion and egress, hemoglobin degradation, and intracellular development of the parasite. The temporal, site-specific regulation of cysteine-protease activity is a prerequisite for survival and propagation of Plasmodium. Recently, a new family of inhibitors of cysteine proteases (ICPs) with homologs in at least eight Plasmodium species has been identified. Here, we report the 2.6 Å X-ray crystal structure of the C-terminal, inhibitory domain of ICP from P. berghei (PbICP-C) in a 1:1 complex with falcipain-2, an important hemoglobinase of Plasmodium. The structure establishes Plasmodium ICP as a member of the I42 class of chagasin-like protease inhibitors but with large insertions and differences in the binding mode relative to other family members. Furthermore, the PbICP-C structure explains why host-cell cathepsin B-like proteases and, most likely, also the protease-like domain of Plasmodium SERA5 (serine-repeat antigen 5) are no targets for ICP.


    Organizational Affiliation

    Institute of Biochemistry, Center for Structural and Cell Biology in Medicine, University of Lübeck, 23538 Lübeck, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Falcipain 2A240Plasmodium falciparumMutation(s): 1 
EC: 3.4.22
UniProt
Find proteins for Q9N6S8 (Plasmodium falciparum)
Explore Q9N6S8 
Go to UniProtKB:  Q9N6S8
Entity Groups  
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UniProt GroupQ9N6S8
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PbICP-CB187Plasmodium bergheiMutation(s): 0 
Gene Names: PB000502.02.0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.15α = 90
b = 71.15β = 90
c = 120.09γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-07-27
    Type: Initial release