1RLR

STRUCTURE OF RIBONUCLEOTIDE REDUCTASE PROTEIN R1

• PDB DOI: https://doi.org/10.2210/pdb1RLR/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1994-08-12 Released: 1996-12-23 
• Deposition Author(s): Uhlin, U., Eklund, H.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 

Literature

Structure of ribonucleotide reductase protein R1.

Uhlin, U., Eklund, H.

(1994) Nature 370: 533-539

• PubMed: 8052308 
• DOI: https://doi.org/10.1038/370533a0
• Primary Citation of Related Structures:  
  1RLR


• PubMed Abstract: 
  

  Ribonucleotide reductase is the only enzyme that catalyses de novo formation of deoxyribonucleotides and is thus a key enzyme in DNA synthesis. The radical-based reaction involves five cysteins. Two redox-active cysteines are located at adjacent antiparallel strands in a new type of ten-stranded alpha/beta-barrel, and two others at the carboxyl end in a flexible arm. The fifth cysteine, in a loop in the centre of the barrel, is positioned to initiate the radical reaction.

---

Organizational Affiliation: 

Department of Molecular Biology, Swedish University of Agricultural Sciences, Uppsala.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 86.01 kDa 
• Atom Count: 5,875 
• Modelled Residue Count: 737 
• Deposited Residue Count: 761 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RIBONUCLEOTIDE REDUCTASE PROTEIN R1	A	761	Escherichia coli	Mutation(s): 0  EC: 1.17.4.1
UniProt
Find proteins for P00452 (Escherichia coli (strain K12)) Explore P00452  Go to UniProtKB:  P00452

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 226	α = 90
b = 226	β = 90
c = 341	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-12-23 
Deposition Author(s): Uhlin, U., Eklund, H.

Revision History  

• Version 1.0: 1996-12-23
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Other
• Version 1.4: 2024-11-20
  Changes: Structure summary