Int. J. Mol. Sci. 2008, 9(8), 1548-1560; doi:10.3390/ijms9081548

The Metal-Dependent Regulators FurA and FurB from Mycobacterium Tuberculosis

4email, 2email, 1email and 3,* email
Received: 9 May 2008; in revised form: 29 July 2008 / Accepted: 30 July 2008 / Published: 28 August 2008
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The ferric uptake regulators (Fur) form a large family of bacterial metalactivated DNA-binding proteins that control a diverse set of genes at the transcriptional level. Mycobacterium tuberculosis, the causative agent of tuberculosis, expresses two members of the Fur family, designated FurA and FurB. Although both belong to the same family, they share only approximately 25% sequence identity and as a consequence, they differ significantly in some of their key biological functions. FurA appears to be a specialized iron-dependent regulator that controls the katG gene, which encodes for a catalase-peroxidase involved in the response of M. tuberculosis to oxidative stress. KatG is also the key mycobacterial enzyme responsible for the activation of the first-line tuberculosis drug Isoniazid. FurB in contrast requires Zn2+ rather than Fe2+, to bind to its target sequence in regulated genes, which include those involved in Zn2+-homeostasis. Recent biochemical, crystallographic and spectroscopic data have now shed light on the activation and metal discrimination mechanisms in this protein family.
Keywords: Metal uptake; regulator; ferric; zinc; Mycobacterium tuberculosis
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MDPI and ACS Style

Lucarelli, D.; Vasil, M.L.; Meyer-Klaucke, W.; Pohl, E. The Metal-Dependent Regulators FurA and FurB from Mycobacterium Tuberculosis. Int. J. Mol. Sci. 2008, 9, 1548-1560.

AMA Style

Lucarelli D, Vasil ML, Meyer-Klaucke W, Pohl E. The Metal-Dependent Regulators FurA and FurB from Mycobacterium Tuberculosis. International Journal of Molecular Sciences. 2008; 9(8):1548-1560.

Chicago/Turabian Style

Lucarelli, Debora; Vasil, Michael L.; Meyer-Klaucke, Wolfram; Pohl, Ehmke. 2008. "The Metal-Dependent Regulators FurA and FurB from Mycobacterium Tuberculosis." Int. J. Mol. Sci. 9, no. 8: 1548-1560.

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