1QK1

CRYSTAL STRUCTURE OF HUMAN UBIQUITOUS MITOCHONDRIAL CREATINE KINASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Crystal Structure of Human Ubiquitous Mitochondrial Creatine Kinase

Eder, M.Fritz-Wolf, K.Kabsch, W.Wallimann, T.Schlattner, U.

(2000) Proteins 39: 216

  • DOI: 10.1002/(sici)1097-0134(20000515)39:3<216::aid-prot40>3.0.co;2-#
  • Primary Citation of Related Structures:  
    1QK1

  • PubMed Abstract: 
  • Creatine kinase (CK), catalyzing the reversible trans-phosphorylation between ATP and creatine, plays a key role in the energy metabolism of cells with high and fluctuating energy requirements. We have solved the X-ray structure of octameric human ubiquitous mitochondrial CK (uMtCK) at 2 ...

    Creatine kinase (CK), catalyzing the reversible trans-phosphorylation between ATP and creatine, plays a key role in the energy metabolism of cells with high and fluctuating energy requirements. We have solved the X-ray structure of octameric human ubiquitous mitochondrial CK (uMtCK) at 2.7 A resolution, representing the first human CK structure. The structure is very similar to the previously determined structure of sarcomeric mitochondrial CK (sMtCK). The cuboidal octamer has 422 point group symmetry with four dimers arranged along the fourfold axis and a central channel of approximately 20 A diameter, which extends through the whole octamer. Structural differences with respect to sMtCK are found in isoform-specific regions important for octamer formation and membrane binding. Octameric uMtCK is stabilized by numerous additional polar interactions between the N-termini of neighboring dimers, which extend into the central channel and form clamp-like structures, and by a pair of salt bridges in the hydrophobic interaction patch. The five C-terminal residues of uMtCK, carrying positive charges likely to be involved in phospholipid-binding, are poorly defined by electron density, indicating a more flexible region than the corresponding one in sMtCK. The structural differences between uMtCK and sMtCK are consistent with biochemical studies on octamer stability and membrane binding of the two isoforms.


    Related Citations: 
    • Structure of Mitochondrial Creatine Kinase:
      Fritz-Wolf, K., Schnyder, T., Wallimann, T., Kabsch, W.
      (1996) Nature 381: 341

    Organizational Affiliation

    Institute of Cell Biology, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CREATINE KINASE, UBIQUITOUS MITOCHONDRIALA, B, C, D, E, F, G, H379Homo sapiensMutation(s): 0 
Gene Names: GENBANK ACCESSION J04469 GENE: GENBANK ACCESSION J04469CKMT1ACKMTCKMT1B
EC: 2.7.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for P12532 (Homo sapiens)
Explore P12532 
Go to UniProtKB:  P12532
PHAROS:  P12532
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.811α = 90
b = 125.868β = 96.71
c = 212.074γ = 90
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XDSdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-04-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-06-28
    Changes: Data collection
  • Version 1.4: 2018-10-24
    Changes: Data collection, Source and taxonomy
  • Version 1.5: 2019-05-22
    Changes: Data collection, Refinement description