3R6W image
Entry Detail
PDB ID:
3R6W
Keywords:
Title:
paAzoR1 binding to nitrofurazone
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2011-03-22
Release Date:
2011-08-24
Method Details:
Experimental Method:
Resolution:
2.09 Å
R-Value Free:
0.20
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:FMN-dependent NADH-azoreductase 1
Chain IDs:A, B
Chain Length:212
Number of Molecules:2
Biological Source:Pseudomonas aeruginosa
Primary Citation
Activation of nitrofurazone by azoreductases: multiple activities in one enzyme.
Sci Rep 1 63 63 (2011)
PMID: 22355582 DOI: 10.1038/srep00063

Abstact

Azoreductases are well known for azo pro-drug activation by gut flora. We show that azoreductases have a wider role in drug metabolism than previously thought as they can also reduce and hence activate nitrofurazone. Nitrofurazone, a nitroaromatic drug, is a broad spectrum antibiotic which has until now been considered as activated in bacteria by nitroreductases. The structure of the azoreductase with nitrofurazone bound was solved at 2.08 Å and shows nitrofurazone in an active conformation. Based on the structural information, the kinetics and stoichiometry of nitrofurazone reduction by azoreductase from P. aeruginosa, we propose a mechanism of activation which accounts for the ability of azoreductases to reduce both azo and nitroaromatic drugs. This mode of activation can explain the cytotoxic side-effects of nitrofurazone through human azoreductase homologues.

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