ISDA

Deposition Date 2012-08-09

Release Date 2012-10-03

Last Version Date 2023-12-20

Entry Detail

PDB ID:

4B68

Keywords:

OXIDOREDUCTASE

Title:

A. fumigatus ornithine hydroxylase (SidA), re-oxidised state bound to NADP and Arg

Biological Source:

Source Organism:

ASPERGILLUS FUMIGATUS (Taxon ID: 746128)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.29 Å

R-Value Free:

0.26

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:L-ORNITHINE N5 MONOOXYGENASE
Chain IDs:A
Chain Length:501
Number of Molecules:1
Biological Source:ASPERGILLUS FUMIGATUS

UniProt ID:E9QYP0 Pfam ID:PF13434

Ligand Molecules

ARG

FAD

GOL

NAP

SO4

Primary Citation

Structural Insight Into the Mechanism of Oxygen Activation and Substrate Selectivity of Flavin-Dependent N-Hydroxylating Monooxygenases.

Franceschini, S, Fedkenheuer, M, Vogelaar, N.J, Robinson, H.H, Sobrado, P, Mattevi, A.Show

Biochemistry 51 7043 ? (2012)

PMID: 22928747 DOI: 10.1021/BI301072W

Abstact

SidA from the human pathogen Aspergillus fumigatus catalyzes the generation of N(5)-hydroxyornithine in the biosynthesis of siderophores, a reaction essential for virulence. The crystal structures of SidA in complex with ornithine and lysine reveal the geometry of the interactions among flavin, NADP(+), and the substrate amine group that underlie the hydroxylation reaction. The structural elucidation of the enzyme in complex with arginine provides insight into the role of electrostatics and hydrogen bonding in the mechanism of oxygen activation in this family of enzymes.

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Primary Citation of related structures