1CFR

CRYSTAL STRUCTURE OF CITROBACTER FREUNDII RESTRICTION ENDONUCLEASE CFR10I AT 2.15 ANGSTROMS RESOLUTION.

• PDB DOI: https://doi.org/10.2210/pdb1CFR/pdb

• Classification: RESTRICTION ENDONUCLEASE
• Organism(s): Citrobacter freundii
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1996-02-02 Released: 1997-01-27 
• Deposition Author(s): Bozic, D., Grazulis, S., Siksnys, V., Huber, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Work: 
  0.196 (Depositor) 
• R-Value Observed: 
  0.196 (Depositor) 

Literature

Crystal structure of Citrobacter freundii restriction endonuclease Cfr10I at 2.15 A resolution.

Bozic, D., Grazulis, S., Siksnys, V., Huber, R.

(1996) J Mol Biol 255: 176-186

• PubMed: 8568865 
• DOI: https://doi.org/10.1006/jmbi.1996.0015
• Primary Citation of Related Structures:  
  1CFR


• PubMed Abstract: 
  

  The X-ray crystal structure of Citrobacter freundii restriction endonuclease Cfr10I has been determined at a resolution of 2.15 A by multiple isomorphous replacement methods and refined to an R-factor of 19.64%. The structure of Cfr10I represents the first structure of a restriction endonuclease recognizing a degenerated nucleotide sequence. Structural comparison of Cfr10I with previously solved structures of other restriction enzymes suggests that recognition of specific sequence occurs through contacts in the major and the minor grooves of DNA. The arrangement of the putative active site residues shows some striking differences from previously described restriction endonucleases and supports a two-metal-ion mechanism of catalysis.

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Organizational Affiliation: 

Max-Planck-Institut für Biochemie, Planegg-Martinsried Germany.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 32.05 kDa 
• Atom Count: 2,340 
• Modelled Residue Count: 283 
• Deposited Residue Count: 285 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RESTRICTION ENDONUCLEASE	A	285	Citrobacter freundii	Mutation(s): 0  EC: 3.1.21.4
UniProt
Find proteins for P56200 (Citrobacter freundii) Explore P56200  Go to UniProtKB:  P56200

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Work:  0.196 (Depositor) 
• R-Value Observed: 0.196 (Depositor) 

Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.5	α = 90
b = 81.3	β = 90
c = 119.7	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
ROTAVATA	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-01-27 
Deposition Author(s): Bozic, D., Grazulis, S., Siksnys, V., Huber, R.

Revision History  

• Version 1.0: 1997-01-27
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Other, Refinement description