1S6J

N-terminal Region of the Ca2+-saturated calcium regulatory domain (CLD) from Soybean Calcium-dependent Protein Kinase-alpha (CDPK)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum,structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations,structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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: 15131-15140

  • DOI: 10.1021/bi048751r
  • Also Cited By: 1S6I

  • PubMed Abstract: 
  • Ca(2+)-dependent protein kinases (CDPKs) are vital Ca(2+)-signaling proteins in plants and protists which have both a kinase domain and a self-contained calcium regulatory calmodulin-like domain (CLD). Despite being very similar to CaM (>40% identity ...

    Ca(2+)-dependent protein kinases (CDPKs) are vital Ca(2+)-signaling proteins in plants and protists which have both a kinase domain and a self-contained calcium regulatory calmodulin-like domain (CLD). Despite being very similar to CaM (>40% identity) and sharing the same fold, recent biochemical and structural evidence suggests that the behavior of CLD is distinct from its namesake, calmodulin. In this study, NMR spectroscopy is employed to examine the structure and backbone dynamics of a 168 amino acid Ca(2+)-saturated construct of the CLD (NtH-CLD) in which almost the entire C-terminal domain is exchange broadened and not visible in the NMR spectra. Structural characterization of the N-terminal domain indicates that the first Ca(2+)-binding loop is significantly more open than in a recently reported structure of the CLD complexed with a putative intramolecular binding region (JD) in the CDPK. Backbone dynamics suggest that parts of the third helix exhibit unusually high mobility, and significant exchange, consistent with previous findings that this helix interacts with the C-terminal domain. Dynamics data also show that the "tether" region, consisting of the first 11 amino acids of CLD, is highly mobile and these residues exhibit distinctive beta-type secondary structure, which may help to position the JD and CLD. Finally, the unusual global dynamic behavior of the protein is rationalized on the basis of possible interdomain rearrangements and the highly variable environments of the C- and N-terminal domains.


    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
    • 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
    • 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 Drive NW, Calgary, Alberta, Canada T2N 1N4.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium-dependent protein kinase SK5
A
87Glycine maxMutation(s): 0 
EC: 2.7.11.1
Find proteins for P28583 (Glycine max)
Go to UniProtKB:  P28583
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum,structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations,structures with the lowest energy 
  • Olderado: 1S6J Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-21
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance