1NEC

NITROREDUCTASE FROM ENTEROBACTER CLOACAE

• PDB DOI: https://doi.org/10.2210/pdb1NEC/pdb

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


• Deposited: 1999-03-30 Released: 2000-03-31 
• Deposition Author(s): Hecht, H.J., Bryant, C., Erdmann, H., Pelletier, H., Sawaya, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.240 
• R-Value Work: 0.180 
• R-Value Observed: 0.170 

Starting Model: experimental

Literature

Crystal Structure of Nitroreductase from Enterobacter Cloacae

Hecht, H.J., Bryant, C., Erdmann, H., Pelletier, H., Sawaya, R.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 97.23 kDa 
• Atom Count: 7,152 
• Modelled Residue Count: 864 
• Deposited Residue Count: 864 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (NITROREDUCTASE)	A, B, C, D	216	Enterobacter cloacae	Mutation(s): 0  EC: 1
UniProt
Find proteins for Q01234 (Enterobacter cloacae) Explore Q01234  Go to UniProtKB:  Q01234

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMN	E [auth A], F [auth B], G [auth C], H [auth D]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.240 
• R-Value Work: 0.180 
• R-Value Observed: 0.170 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44	α = 90
b = 92.5	β = 93
c = 102.5	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
UCSD-system	data reduction
UCSD-system	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-03-31 
Deposition Author(s): Hecht, H.J., Bryant, C., Erdmann, H., Pelletier, H., Sawaya, R.

Revision History  

• Version 1.0: 2000-03-31
  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: 2017-10-04
  Changes: Refinement description
• Version 1.4: 2023-08-16
  Changes: Data collection, Database references, Derived calculations, Refinement description