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Inactivation of the Mycobacterium tuberculosis Nramp orthologue (mntH) does not affect virulence in a mouse model of tuberculosis

Domenech, P., Pym, A.S, Cellier, M., Barry, C. E. and Cole, S. T. (2002) 'Inactivation of the Mycobacterium tuberculosis Nramp orthologue (mntH) does not affect virulence in a mouse model of tuberculosis'. Fems Microbiology Letters, Vol 207, Issue 1, pp. 81-86.

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Mycobacterium tuberculosis is an intracellular pathogen which can survive and multiply within the phagosomal compartment of the macrophage, and in doing so has to withstand the various macrophage defense mechanisms, which include limitation of iron and other metals. Analysis of the complete genome sequence of M. tuberculosis revealed an extensive array of cation transporters, including mntH, an orthologue of the eukaryotic Nramp (natural resistance-associated macrophage protein) gene, that encodes a proton-dependent divalent metal transporter. To assess the effect of this transporter on intracellular survival and pathogenesis, an mntH knock-out mutant of M. tuberculosis H37Rv was created and assayed in bone marrow-derived macrophages and in a murine model of tuberculosis. In neither of these systems was any loss of fitness associated with inactivation of mntH, demonstrating that Nramp orthologues are not important determinants of mycobacterial virulence.

Item Type: Article
Subjects: QU Biochemistry > Cells and Genetics > QU 300 General works
QU Biochemistry > Genetics > QU 470 Genetic structures
WC Communicable Diseases > Infection. Bacterial Infections > Other Bacterial Infections. Zoonotic Bacterial Infections > WC 302 Actinomycetales infections. Mycobacterium infections
WF Respiratory System > Tuberculosis > WF 200 Tuberculosis (General)
Digital Object Identifer (DOI):
Depositing User: Lynn Roberts-Maloney
Date Deposited: 09 Oct 2013 14:23
Last Modified: 14 Dec 2021 14:24


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