PMID- 24008839 OWN - NLM STAT- MEDLINE DCOM- 20140214 LR - 20220330 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 3 DP - 2013 TI - Involvement of A20 in the molecular switch that activates the non-canonical NF-small ka, CyrillicB pathway. PG - 2568 LID - 10.1038/srep02568 [doi] LID - 2568 AB - The non-canonical NF-kappaB pathway is crucial for the immune system. A critical event in activation of the non-canonical pathway is the attenuation of NF-kappaB-inducing kinase (NIK) degradation, which is promoted by continuous polyubiquitination of NIK catalyzed by the NIK ubiquitin-ligase complex composed of cellular inhibitor of apoptosis protein 1 and 2 (cIAP1/2), TNF receptor-associated factor 2 (TRAF2), and TRAF3. However, the molecular mechanism of stimulation-dependent NIK stabilization remains poorly understood. Here, we show that A20, a ubiquitin-editing enzyme, promotes efficient activation of the non-canonical pathway independent of its catalytic activity. A20 directly binds to cIAP1 through the seventh zinc finger of A20, resulting in dissociation of the TRAF2/TRAF3 interaction, thereby inactivating the ligase complex to stabilize NIK. Given that A20 negatively regulates the canonical pathway, A20 is likely involved in the molecular switch that promotes the transition from canonical to non-canonical activation for proper control of the immune system. FAU - Yamaguchi, Noritaka AU - Yamaguchi N AD - Division of Cellular and Molecular Biology, Department of Cancer Biology, Institute of Medical Science, University of Tokyo, Shirokanedai, Minato-ku, Tokyo, Japan. FAU - Oyama, Masaaki AU - Oyama M FAU - Kozuka-Hata, Hiroko AU - Kozuka-Hata H FAU - Inoue, Jun-ichiro AU - Inoue J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (DNA-Binding Proteins) RN - 0 (Inhibitor of Apoptosis Proteins) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (NF-kappa B) RN - 0 (Nuclear Proteins) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (TNF Receptor-Associated Factor 3) RN - 0 (Ubiquitins) RN - EC 3.4.19.12 (TNFAIP3 protein, human) RN - EC 3.4.19.12 (Tumor Necrosis Factor alpha-Induced Protein 3) SB - IM MH - DNA-Binding Proteins/*metabolism MH - Inhibitor of Apoptosis Proteins/*metabolism MH - Intracellular Signaling Peptides and Proteins/*metabolism MH - NF-kappa B/*metabolism MH - Nuclear Proteins/*metabolism MH - Signal Transduction/physiology MH - TNF Receptor-Associated Factor 2/*metabolism MH - TNF Receptor-Associated Factor 3/*metabolism MH - Tumor Necrosis Factor alpha-Induced Protein 3 MH - Ubiquitination/*physiology MH - Ubiquitins/*metabolism PMC - PMC3764444 EDAT- 2013/09/07 06:00 MHDA- 2014/02/15 06:00 PMCR- 2013/09/06 CRDT- 2013/09/07 06:00 PHST- 2013/01/18 00:00 [received] PHST- 2013/08/19 00:00 [accepted] PHST- 2013/09/07 06:00 [entrez] PHST- 2013/09/07 06:00 [pubmed] PHST- 2014/02/15 06:00 [medline] PHST- 2013/09/06 00:00 [pmc-release] AID - srep02568 [pii] AID - 10.1038/srep02568 [doi] PST - ppublish SO - Sci Rep. 2013;3:2568. doi: 10.1038/srep02568.