ISDA

Entry Detail

PDB ID:

3KEG

Keywords:

OXIDOREDUCTASE

Title:

X-ray Crystallographic Structure of a Y131F mutant of Pseudomonas Aeruginosa Azoreductase in complex with Methyl RED

Biological Source:

Source Organism:

Pseudomonas aeruginosa

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2009-10-26

Release Date:

2010-01-12

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.10 Å

R-Value Free:

0.20

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 31 2 1

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:FMN-dependent NADH-azoreductase 1
Mutations:Y131F
Chain IDs:A, B
Chain Length:212
Number of Molecules:2
Biological Source:Pseudomonas aeruginosa

UniProt ID:Q9I5F3 Pfam ID:PF02525 EC:1.7.1.6

Ligand Molecules

FMN

GOL

MRE

Primary Citation

Role of tyrosine 131 in the active site of paAzoR1, an azoreductase with specificity for the inflammatory bowel disease prodrug balsalazide

Wang, C.-J, Laurieri, N, Abuhammad, A, Lowe, E, Westwood, I, Ryan, A, Sim, E.Show

Acta Crystallogr.,Sect.F 66 2 7 (2010)

PMID: 20057057 DOI: 10.1107/S1744309109044741

Abstact

Azoreductase 1 from Pseudomonas aeruginosa strain PAO1 (paAzoR1) catalyses the activation of the prodrug balsalazide and reduces the azo dye methyl red using reduced nicotinamide adenine dinucleotide cofactor as an electron donor. To investigate the mechanism of the enzyme, a Y131F mutation was introduced and the enzymic properties of the mutant were compared with those of the wild-type enzyme. The crystallographic structure of the mutant with methyl red bound was solved at 2.1 A resolution and compared with the wild-type structure. Tyr131 is important in the architecture of the active site but is not essential for enzymic activity.

Legend

Protein

Chemical

Disease

Primary Citation of related structures