1QK1

CRYSTAL STRUCTURE OF HUMAN UBIQUITOUS MITOCHONDRIAL CREATINE KINASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.4 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: Struct.,Funct., Genet. 39: 216


  • 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 ub ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CREATINE KINASE, UBIQUITOUS MITOCHONDRIAL
A, B, C, D, E, F, G, H
379Homo sapiensMutation(s): 0 
Gene Names: CKMT1A, CKMT1B (CKMT, CKMT)
EC: 2.7.3.2
Find proteins for P12532 (Homo sapiens)
Go to Gene View: CKMT1A CKMT1B
Go to UniProtKB:  P12532
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 91.811α = 90.00
b = 125.868β = 96.71
c = 212.074γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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