Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Iron is an essential element for almost all organisms, although an overload of this element results in toxicity because of the formation of hydroxyl radicals. Consequently, most living entities have developed sophisticated mechanisms to control their intracellular iron concentration. In many bacteria, including the opportunistic pathogen Pseudomonas aeruginosa, this task is performed by the ferric uptake regulator (Fur). Fur controls a wide variety of basic physiological processes including iron uptake systems and the expression of exotoxin A. Here, we present the first crystal structure of Fur from P. aeruginosa in complex with Zn2+ determined at a resolution of 1.8 A. Furthermore, X-ray absorption spectroscopic measurements and microPIXE analysis were performed in order to characterize the distinct zinc and iron binding sites in solution. The combination of these complementary techniques enables us to present a model for the activation and DNA binding of the Fur protein.

Original publication

DOI

10.1046/j.1365-2958.2003.03337.x

Type

Journal article

Journal

Mol Microbiol

Publication Date

02/2003

Volume

47

Pages

903 - 915

Keywords

Amino Acid Sequence, Bacterial Proteins, Crystallography, X-Ray, DNA, Bacterial, Homeostasis, Iron, Macromolecular Substances, Models, Molecular, Molecular Sequence Data, Molecular Structure, Protein Conformation, Pseudomonas aeruginosa, Repressor Proteins, Sequence Homology, Amino Acid, Spectrometry, X-Ray Emission, Spectrum Analysis, Static Electricity, X-Rays