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    Science. 2003 Jun 6;300(5625):1584-7.

    Nod1 detects a unique muropeptide from gram-negative bacterial peptidoglycan.

    Girardin SE, Boneca IG, Carneiro LA, Antignac A, Jéhanno M, Viala J, Tedin K, Taha MK, Labigne A, Zähringer U, Coyle AJ, DiStefano PS, Bertin J, Sansonetti PJ, Philpott DJ.

    Source

    Unité de Pathogénie Microbienne Moléculaire, INSERM U389, Institut Pasteur, 28, Rue du Dr. Roux, 75724Paris Cedex 15, France.

    Abstract

    Although the role of Toll-like receptors in extracellular bacterial sensing has been investigated intensively, intracellular detection of bacteria through Nod molecules remains largely uncharacterized. Here, we show that human Nod1 specifically detects a unique diaminopimelate-containing N-acetylglucosamine-N-acetylmuramic acid (GlcNAc-MurNAc) tripeptide motif found in Gram-negative bacterial peptidoglycan, resulting in activation of the transcription factor NF-kappaB pathway. Moreover, we show that in epithelial cells (which represent the first line of defense against invasive pathogens), Nod1is indispensable for intracellular Gram-negative bacterial sensing.

    PMID:
    12791997
    [PubMed - indexed for MEDLINE]

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