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2fe3

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Image:2fe3.jpg

2fe3, resolution 1.75Å

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The crystal structure of bacillus subtilis PerR-Zn reveals a novel Zn(Cys)4 Structural redox switch

Overview

Bacteria adapt to elevated levels of Reactive Oxygen Species (ROS) by, increasing the expression of defence and repair proteins, which is, regulated by ROS responsive transcription factors. In Bacillus subtilis, the zinc protein PerR, a peroxide sensor that binds DNA in the presence of, a regulatory metal Mn2+ or Fe2+, mediates the adaptive response to H2O2., This study presents the first crystal structure of apo-PerR-Zn which shows, that all four cysteine residues of the protein are involved in zinc, co-ordination. The Zn(Cys)4 site locks the dimerization domain and, stabilizes the dimer. Sequence alignment of PerR-like proteins supports, that this structural site may constitute a distinctive feature of this, class of peroxide stress regulators.

About this Structure

2FE3 is a Single protein structure of sequence from Bacillus subtilis with ZN as ligand. Full crystallographic information is available from OCA.

Reference

Crystal structure of the apo-PerR-Zn protein from Bacillus subtilis., Traore DA, El Ghazouani A, Ilango S, Dupuy J, Jacquamet L, Ferrer JL, Caux-Thang C, Duarte V, Latour JM, Mol Microbiol. 2006 Sep;61(5):1211-9. PMID:16925555

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