TY - JOUR
T1 - The Ubiquitin Ligase XIAP Recruits LUBAC for NOD2 Signaling in Inflammation and Innate Immunity
AU - Damgaard, Rune Busk
AU - Nachbur, Ueli
AU - Yabal, Monica
AU - Wong, Wendy Wei-Lynn
AU - Fiil, Berthe Katrine
AU - Kastirr, Mischa
AU - Rieser, Eva
AU - Rickard, James Arthur
AU - Bankovacki, Aleksandra
AU - Peschel, Christian
AU - Ruland, Juergen
AU - Bekker-Jensen, Simon
AU - Mailand, Niels
AU - Kaufmann, Thomas
AU - Strasser, Andreas
AU - Walczak, Henning
AU - Silke, John
AU - Jost, Philipp J
AU - Gyrd-Hansen, Mads
N1 - Copyright © 2012 Elsevier Inc. All rights reserved.
PY - 2012/6/29
Y1 - 2012/6/29
N2 - Nucleotide-binding and oligomerization domain (NOD)-like receptors constitute a first line of defense against invading bacteria. X-linked Inhibitor of Apoptosis (XIAP) is implicated in the control of bacterial infections, and mutations in XIAP are causally linked to immunodeficiency in X-linked lymphoproliferative syndrome type-2 (XLP-2). Here, we demonstrate that the RING domain of XIAP is essential for NOD2 signaling and that XIAP contributes to exacerbation of inflammation-induced hepatitis in experimental mice. We find that XIAP ubiquitylates RIPK2 and recruits the linear ubiquitin chain assembly complex (LUBAC) to NOD2. We further show that LUBAC activity is required for efficient NF-κB activation and secretion of proinflammatory cytokines after NOD2 stimulation. Remarkably, XLP-2-derived XIAP variants have impaired ubiquitin ligase activity, fail to ubiquitylate RIPK2, and cannot facilitate NOD2 signaling. We conclude that XIAP and LUBAC constitute essential ubiquitin ligases in NOD2-mediated inflammatory signaling and propose that deregulation of NOD2 signaling contributes to XLP-2 pathogenesis.
AB - Nucleotide-binding and oligomerization domain (NOD)-like receptors constitute a first line of defense against invading bacteria. X-linked Inhibitor of Apoptosis (XIAP) is implicated in the control of bacterial infections, and mutations in XIAP are causally linked to immunodeficiency in X-linked lymphoproliferative syndrome type-2 (XLP-2). Here, we demonstrate that the RING domain of XIAP is essential for NOD2 signaling and that XIAP contributes to exacerbation of inflammation-induced hepatitis in experimental mice. We find that XIAP ubiquitylates RIPK2 and recruits the linear ubiquitin chain assembly complex (LUBAC) to NOD2. We further show that LUBAC activity is required for efficient NF-κB activation and secretion of proinflammatory cytokines after NOD2 stimulation. Remarkably, XLP-2-derived XIAP variants have impaired ubiquitin ligase activity, fail to ubiquitylate RIPK2, and cannot facilitate NOD2 signaling. We conclude that XIAP and LUBAC constitute essential ubiquitin ligases in NOD2-mediated inflammatory signaling and propose that deregulation of NOD2 signaling contributes to XLP-2 pathogenesis.
U2 - 10.1016/j.molcel.2012.04.014
DO - 10.1016/j.molcel.2012.04.014
M3 - Journal article
C2 - 22607974
SN - 1097-2765
VL - 46
SP - 746
EP - 758
JO - Molecular Cell
JF - Molecular Cell
IS - 6
ER -