3KU2

Crystal Structure of inactivated form of CDPK1 from toxoplasma gondii, TGME49.101440


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Structures of apicomplexan calcium-dependent protein kinases reveal mechanism of activation by calcium.

Wernimont, A.K.Artz, J.D.Finerty, P.Lin, Y.H.Amani, M.Allali-Hassani, A.Senisterra, G.Vedadi, M.Tempel, W.Mackenzie, F.Chau, I.Lourido, S.Sibley, L.D.Hui, R.

(2010) Nat Struct Mol Biol 17: 596-601

  • DOI: https://doi.org/10.1038/nsmb.1795
  • Primary Citation of Related Structures:  
    3HX4, 3HZT, 3IGO, 3KU2

  • PubMed Abstract: 

    Calcium-dependent protein kinases (CDPKs) have pivotal roles in the calcium-signaling pathway in plants, ciliates and apicomplexan parasites and comprise a calmodulin-dependent kinase (CaMK)-like kinase domain regulated by a calcium-binding domain in the C terminus. To understand this intramolecular mechanism of activation, we solved the structures of the autoinhibited (apo) and activated (calcium-bound) conformations of CDPKs from the apicomplexan parasites Toxoplasma gondii and Cryptosporidium parvum. In the apo form, the C-terminal CDPK activation domain (CAD) resembles a calmodulin protein with an unexpected long helix in the N terminus that inhibits the kinase domain in the same manner as CaMKII. Calcium binding triggers the reorganization of the CAD into a highly intricate fold, leading to its relocation around the base of the kinase domain to a site remote from the substrate binding site. This large conformational change constitutes a distinct mechanism in calcium signal-transduction pathways.


  • Organizational Affiliation

    Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calmodulin-domain protein kinase 1507Toxoplasma gondiiMutation(s): 0 
Gene Names: CDPK1TGME49_101440
UniProt
Find proteins for Q9BJF5 (Toxoplasma gondii)
Explore Q9BJF5 
Go to UniProtKB:  Q9BJF5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BJF5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.01α = 90
b = 72.912β = 96.26
c = 65.018γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
DENZOdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2018-01-24
    Changes: Structure summary
  • Version 1.4: 2019-07-17
    Changes: Data collection, Refinement description
  • Version 1.5: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description