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Trends Microbiol. 2005 Aug;13(8):381-8.

NACHT-LRR proteins (NLRs) in bacterial infection and immunity.

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Immunité Innée et Signalisation, Institut Pasteur, 28 Rue du Docteur Roux, 75724 Paris Cedex 15, France.


Eukaryotes have evolved systems to detect bacterial intrusion. Recognition of bacteria relies on the sensing of pathogen associated molecular patterns (PAMPs) by host pattern recognition molecules (PRMs), which include various families of leucine-rich repeat (LRR) bearing proteins in plants and animals. Detection of microbes often occurs outside the cell. Recent findings now indicate that mammals have also evolved strategies to recognize bacteria inside the cell via members of the NACHT-LRR protein family (NLRs). Here, we review the biology of these mammalian NLRs and the emerging view of their important, role not solely as PRMs but as signalling platforms and regulators of immunity.

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