3E3R

Crystal structure and biochemical characterization of recombinant human calcyphosine delineates a novel EF-hand-containing protein family

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.233 

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This is version 1.1 of the entry. See complete history. 


Literature

Crystal-structure and biochemical characterization of recombinant human calcyphosine delineates a novel EF-hand-containing protein family

Dong, H., Li, X., Lou, Z., Xu, X., Su, D., Zhou, X., Zhou, W., Bartlam, M., Rao, Z.

(2008) J Mol Biol 383: 455-464

  • DOI: 10.1016/j.jmb.2008.08.048
  • Primary Citation of Related Structures:  
    3E3R

  • PubMed Abstract: 

    • Calcyphosine is an EF-hand protein involved in both Ca(2+)-phosphatidylinositol and cyclic AMP signal cascades, as well as in other cellular functions. The crystal structure of Ca(2+)-loaded calcyphosine was determined up to 2.65 A resolution and reveals ...

    Calcyphosine is an EF-hand protein involved in both Ca(2+)-phosphatidylinositol and cyclic AMP signal cascades, as well as in other cellular functions. The crystal structure of Ca(2+)-loaded calcyphosine was determined up to 2.65 A resolution and reveals a protein containing two pairs of Ca(2+)-binding EF-hand motifs. Calcyphosine shares a highly similar overall topology with calmodulin. However, there are striking differences between EF-hand 4, both N-terminal and C-terminal regions, and interdomain linkers. The C-terminal domain of calcyphosine possesses a large hydrophobic pocket in the presence of calcium ions that might be implicated in ligand binding, while its N-terminal hydrophobic pocket is almost shielded by an additional terminal helix. Calcyphosine is largely monomeric, regardless of the presence of Ca(2+). Differences in structure, oligomeric state in the presence and in the absence of Ca(2+), a highly conserved sequence with low similarity to other proteins, and phylogeny define a new EF-hand-containing family of calcyphosine proteins that extends from arthropods to humans.

    Organizational Affiliation: 

    Laboratory of Structural Biology, Tsinghua University, Beijing 100084, China.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Calcyphosin A, B204Homo sapiensMutation(s): 0 
Gene Names: CAPS
Find proteins for Q13938 (Homo sapiens)
Explore Q13938 
Go to UniProtKB:  Q13938
NIH Common Fund Data Resources
PHAROS:  Q13938
GTEx:  ENSG00000105519
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.233 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.593α = 90
b = 130.411β = 90
c = 46.199γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2008-08-07 
  • Released Date: 2008-08-26 
    • Deposition Author(s): Dong, H.

Revision History 

  • Version 1.0: 2008-08-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance