Protein kinase G from pathogenic mycobacteria promotes survival within macrophages - PubMed (original) (raw)

. 2004 Jun 18;304(5678):1800-4.

doi: 10.1126/science.1099384. Epub 2004 May 20.

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Protein kinase G from pathogenic mycobacteria promotes survival within macrophages

Anne Walburger et al. Science. 2004.

Abstract

Pathogenic mycobacteria resist lysosomal delivery after uptake into macrophages, allowing them to survive intracellularly. We found that the eukaryotic-like serine/threonine protein kinase G from pathogenic mycobacteria was secreted within macrophage phagosomes, inhibiting phagosome-lysosome fusion and mediating intracellular survival of mycobacteria. Inactivation of protein kinase G by gene disruption or chemical inhibition resulted in lysosomal localization and mycobacterial cell death in infected macrophages. Besides identifying a target for the control of mycobacterial infections, these findings suggest that pathogenic mycobacteria have evolved eukaryotic-like signal transduction mechanisms capable of modulating host cell trafficking pathways.

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