1S6I

Ca2+-regulatory region (CLD) from soybean calcium-dependent protein kinase-alpha (CDPK) in the presence of Ca2+ and the junction domain (JD)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Unexpected structure of the Ca2+-regulatory region from soybean calcium-dependent protein kinase-alpha

Weljie, A.M.Vogel, H.J.

(2004) J Biol Chem 279: 35494-35502

  • DOI: 10.1074/jbc.M311520200
  • Primary Citation of Related Structures:  
    1S6I

  • PubMed Abstract: 
  • Calcium-dependent protein kinases (CDPKs) are an extensive class of multidomain Ca(2+)-regulated enzymes from plants and protozoa. In vivo the so-called calmodulin-like domain (CLD) of CDPK binds intramolecularly to the junction domain (JD), which exhibits both kinase-inhibitory and CLD binding properties ...

    Calcium-dependent protein kinases (CDPKs) are an extensive class of multidomain Ca(2+)-regulated enzymes from plants and protozoa. In vivo the so-called calmodulin-like domain (CLD) of CDPK binds intramolecularly to the junction domain (JD), which exhibits both kinase-inhibitory and CLD binding properties. Here we report the high resolution solution structure of the calcium-regulatory region from soybean CDPK-alpha determined in the presence of a peptide encompassing the JD. The structure of both lobes of CLD resembles that of related helix-loop-helix Ca(2+)-binding proteins. NMR chemical shift mapping studies demonstrate that the JD induces significant structural changes in isolated Ca(2+)-CLD, particularly the C-terminal domain, although a stable complex is not formed. A CLD solution structure calculated on the basis of NMR data and long range fluorescence resonance energy transfer distances reveals an activated state with both lobes positioned side by side, similar to calcineurin B rather than calmodulin, highlighting the possible pitfall of assigning function purely from sequence information.


    Related Citations: 
    • Conformational changes in the Ca2+-regulatory region from soybean calcium-dependent protein kinase-alpha: fluorescence resonance energy transfer studies
      Weljie, A.M., Robertson, K.M., Vogel, H.J.
      (2003) J Biol Chem 278: 43764
    • Solution Structure and Backbone Dynamics of the N-Terminal Region of the Calcium Regulatory Domain from Soybean Calcium-Dependent Protein Kinase alpha
      Weljie, A.M., Gagne, S.M., Vogel, H.J.
      (2004) Biochemistry 42: 15131
    • A calcium-dependent protein kinase with a regulatory domain similar to calmodulin
      Harper, J.F., Sussman, M.R., Schaller, G.E., Putnam-Evans, C., Charbonneau, H., Harmon, A.C.
      (1991) Science 252: 951

    Organizational Affiliation

    Structural Biology Research Group, Department of Biological Sciences, University of Calgary, 2500 University Dr. N. W., Calgary, Alberta T2N 1N4, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Calcium-dependent protein kinase SK5A188Glycine maxMutation(s): 0 
Gene Names: CDPK SK5
EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt)
UniProt
Find proteins for P28583 (Glycine max)
Explore P28583 
Go to UniProtKB:  P28583
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  • Reference Sequence
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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations 
  • OLDERADO: 1S6I Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance