7K5E image
Deposition Date 2020-09-16
Release Date 2020-12-16
Last Version Date 2023-10-18
Entry Detail
PDB ID:
7K5E
Keywords:
Title:
1.75 A resolution structure of WT BfrB from Pseudomonas aeruginosa in complex with a protein-protein interaction inhibitor JAG-5-7
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.75 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Ferroxidase
Gene (Uniprot):bfrB
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:158
Number of Molecules:12
Biological Source:Pseudomonas aeruginosa
Primary Citation
Small Molecule Inhibitors of the Bacterioferritin (BfrB)-Ferredoxin (Bfd) Complex Kill Biofilm-Embedded Pseudomonas aeruginosa Cells.
Acs Infect Dis. 7 123 140 (2021)
PMID: 33269912 DOI: 10.1021/acsinfecdis.0c00669

Abstact

Bacteria depend on a well-regulated iron homeostasis to survive adverse environments. A key component of the iron homeostasis machinery is the compartmentalization of Fe3+ in bacterioferritin and its subsequent mobilization as Fe2+ to satisfy metabolic requirements. In Pseudomonas aeruginosa Fe3+ is compartmentalized in bacterioferritin (BfrB), and its mobilization to the cytosol requires binding of a ferredoxin (Bfd) to reduce the stored Fe3+ and release the soluble Fe2+. Blocking the BfrB-Bfd complex in P. aeruginosa by deletion of the bfd gene triggers an irreversible accumulation of Fe3+ in BfrB, concomitant cytosolic iron deficiency and significant impairment of biofilm development. Herein we report that small molecules developed to bind BfrB at the Bfd binding site block the BfrB-Bfd complex, inhibit the mobilization of iron from BfrB in P. aeruginosa cells, elicit a bacteriostatic effect on planktonic cells, and are bactericidal to cells embedded in mature biofilms.

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