2CRK

MUSCLE CREATINE KINASE

• PDB DOI: https://doi.org/10.2210/pdb2CRK/pdb

• Classification: TRANSFERASE
• Organism(s): Oryctolagus cuniculus
• Mutation(s): No 


• Deposited: 1998-09-28 Released: 1999-01-13 
• Deposition Author(s): Rao, J.K., Bujacz, G., Wlodawer, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.35 Å
• R-Value Free: 0.288 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 

Starting Model: experimental

Literature

Crystal structure of rabbit muscle creatine kinase.

Rao, J.K., Bujacz, G., Wlodawer, A.

(1998) FEBS Lett 439: 133-137

• PubMed: 9849893 
• DOI: https://doi.org/10.1016/s0014-5793(98)01355-6
• Primary Citation of Related Structures:  
  2CRK


• PubMed Abstract: 
  

  The crystal structure of rabbit muscle creatine kinase, solved at 2.35 A resolution by X-ray diffraction methods, clearly identified the active site with bound sulfates surrounded by a constellation of arginine residues. The putative binding site of creatine, which is occupied by a sulfate group in this analysis, has been tentatively identified. The dimeric interface of the enzyme is held together by a small number of hydrogen bonds.

---

Organizational Affiliation: 

Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, ABL-Basic Research Program, Frederick, MD 21702, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 43.69 kDa 
• Atom Count: 3,379 
• Modelled Residue Count: 365 
• Deposited Residue Count: 381 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (CREATINE KINASE)	A	381	Oryctolagus cuniculus	Mutation(s): 0  EC: 2.7.3.2
UniProt
Find proteins for P00563 (Oryctolagus cuniculus) Explore P00563  Go to UniProtKB:  P00563

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A], D [auth A], E [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.35 Å
• R-Value Free: 0.288 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 
• Space Group: I 4 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 199.6	α = 90
b = 199.6	β = 90
c = 71	γ = 90

Software Package:

Software Name	Purpose
PHASES	phasing
AMoRE	phasing
MADIRA	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
MADIRA	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-01-13 
Deposition Author(s): Rao, J.K., Bujacz, G., Wlodawer, A.

Revision History  

• Version 1.0: 1999-01-13
  Type: Initial release
  
• Version 1.1: 2007-10-16
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description