4L1L

Rat PKC C2 domain bound to CD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.157 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cd(2+) as a ca(2+) surrogate in protein-membrane interactions: isostructural but not isofunctional.

Morales, K.A.Yang, Y.Long, Z.Li, P.Taylor, A.B.Hart, P.J.Igumenova, T.I.

(2013) J.Am.Chem.Soc. 135: 12980-12983

  • DOI: 10.1021/ja406958k

  • PubMed Abstract: 
  • Due to its favorable spectroscopic properties, Cd(2+) is frequently used as a probe of Ca(2+) sites in proteins. We investigate the ability of Cd(2+) to act as a structural and functional surrogate of Ca(2+) in protein-membrane interactions. C2 domai ...

    Due to its favorable spectroscopic properties, Cd(2+) is frequently used as a probe of Ca(2+) sites in proteins. We investigate the ability of Cd(2+) to act as a structural and functional surrogate of Ca(2+) in protein-membrane interactions. C2 domain from protein kinase Cα (C2α) was chosen as a paradigm for the Ca(2+)-dependent phosphatidylserine-binding peripheral membrane domains. We identified the Cd(2+)-binding sites of C2α using NMR spectroscopy, determined the 1.6 Å crystal structure of Cd(2+)-bound C2α, and characterized metal-ion-dependent interactions between C2α and phospholipid membranes using fluorescence spectroscopy and ultracentrifugation experiments. We show that Cd(2+) forms a tight complex with the membrane-binding loops of C2α but is unable to support its membrane-binding function. This is in sharp contrast with Pb(2+), which is almost as effective as Ca(2+) in driving the C2α-membrane association process. Our results provide the first direct evidence for the specific role of divalent metal ions in mediating protein-membrane interactions, have important implications for metal substitution studies in proteins, and illustrate the potential diversity of functional responses caused by toxic metal ions.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein kinase C alpha type
A
139Rattus norvegicusGene Names: Prkca (Pkca)
EC: 2.7.11.13
Find proteins for P05696 (Rattus norvegicus)
Go to UniProtKB:  P05696
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.157 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 58.224α = 90.00
b = 58.224β = 90.00
c = 88.539γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-28
    Type: Initial release
  • Version 1.1: 2013-10-23
    Type: Database references