1L7Z

Crystal structure of Ca2+/Calmodulin complexed with myristoylated CAP-23/NAP-22 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.249 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of a myristoylated CAP-23/NAP-22 N-terminal domain complexed with Ca2+/calmodulin

Matsubara, M., Nakatsu, T., Kato, H., Taniguchi, H.

(2004) EMBO J 23: 712-718

  • DOI: 10.1038/sj.emboj.7600093
  • Primary Citation of Related Structures:  
    1L7Z

  • PubMed Abstract: 

    • A variety of viral and signal transduction proteins are known to be myristoylated. Although the role of myristoylation in protein-lipid interaction is well established, the involvement of myristoylation in protein-protein interactions is less well understood ...

    A variety of viral and signal transduction proteins are known to be myristoylated. Although the role of myristoylation in protein-lipid interaction is well established, the involvement of myristoylation in protein-protein interactions is less well understood. CAP-23/NAP-22 is a brain-specific protein kinase C substrate protein that is involved in axon regeneration. Although the protein lacks any canonical calmodulin (CaM)-binding domain, it binds CaM with high affinity. The binding of CAP-23/NAP-22 to CaM is myristoylation dependent and the N-terminal myristoyl group is directly involved in the protein-protein interaction. Here we show the crystal structure of Ca2+-CaM bound to a myristoylated peptide corresponding to the N-terminal domain of CAP-23/NAP-22. The myristoyl moiety of the peptide goes through a hydrophobic tunnel created by the hydrophobic pockets in the N- and C-terminal domains of CaM. In addition to the myristoyl group, several amino-acid residues in the peptide are important for CaM binding. This is a novel mode of binding and is very different from the mechanism of binding in other CaM-target complexes.

    Related Citations: 
    • Identification of the calmodulin-binding domain of neuron-specific protein kinase C substrate protein CAP-22/NAP-22. Direct involvement of protein myristoylation in calmodulin-target protein interaction
      Takasaki, A., Hayashi, N., Matsubara, M., Yamauchi, E., Taniguchi, H.
      (1999) J Biol Chem 274: 11848
    Organizational Affiliation: 

    Membrane Dynamics Project, Harima Institute at SPring-8, RIKEN, Sayo, Hyogo, Japan. mamoru.matsubara@carnabio.com



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CALMODULINA148Homo sapiensMutation(s): 0 
Gene Names: CALM1, CALM, CAM, CAM1
Find proteins for P0DP23 (Homo sapiens)
Explore P0DP23 
Go to UniProtKB:  P0DP23
NIH Common Fund Data Resources
PHAROS:  P0DP23
GTEx:  ENSG00000198668
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CAP-23/NAP-22B9N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MYR
Query on MYR
Download Ideal Coordinates CCD File 
 G [auth B]MYRISTIC ACID
C14 H28 O2
TUNFSRHWOTWDNC-UHFFFAOYSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
 C [auth A], D [auth A], E [auth A], F [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.249 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.6α = 90
b = 40.6β = 90
c = 173.639γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance