Journal article

Publication year: 2009

Pages: 891-902

Journal: Microbiology

Volume number: 155

ISSN: 1350-0872

eISSN: 1465-2080

Open access status: Bronze

DOI Link: https://doi.org/10.1099/mic.0.022277-0

Publisher: Microbiology Society

Abstract: 
Listeria monocytogenes is a foodborne pathogen able to infect humans and many other mammalian species, leading to serious, often fatal disease. We have previously identified a five-gene locus in the genome of L. monocytogenes EGD-e which comprised three contiguous genes encoding paralogous type I signal peptidases. In the present study, we focused on the two distal genes of the locus (lmo1272 and lmo1273), encoding proteins sharing significant similarities with the YlqF and RnhB proteins, respectively, of Bacillus subtilis. lmo1273 could complement an Escherichia coli rnhA-rnhB thermosensitive growth phenotype, suggesting that it encodes a functional RNase H. Strikingly, inactivation of lmo1273 provoked a strong attenuation of virulence in the mouse model, and kinetic studies in infected mice revealed that multiplication of the lmo1273 mutant in target organs was significantly impaired. However, the mutation did not impair L. monocytogenes intracellular multiplication or cell-to-cell spread in cell culture models. Transcriptional profiles obtained with an lmo1273-overexpressing strain were compared to those of the wild-type strain, using microarray analyses. The data obtained suggest a pleiotropic regulatory role of Lmo 1273 and possible links with amino acid uptake.

Harvard Citation style: Bigot, A., Raynaud, C., Dubail, I., Dupuis, M., Hossain, H., Hain, T., et al. (2009) lmo1273, a novel gene involved in Listeria monocytogenes virulence, Microbiology, 155, pp. 891-902. https://doi.org/10.1099/mic.0.022277-0

APA Citation style: Bigot, A., Raynaud, C., Dubail, I., Dupuis, M., Hossain, H., Hain, T., Chakraborty, T., & Charbit, A. (2009). lmo1273, a novel gene involved in Listeria monocytogenes virulence. Microbiology. 155, 891-902. https://doi.org/10.1099/mic.0.022277-0