Structure and ubiquitination-dependent activation of TANK-binding kinase 1.
Structure and ubiquitination-dependent activation of TANK-binding kinase 1.
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DOI:
10.1016/j.celrep.2013.01.033
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发表时间:
2013-03-28
期刊:
影响因子:
8.8
通讯作者:
Eck MJ
中科院分区:
文献类型:
--
作者:
Tu D;Zhu Z;Zhou AY;Yun CH;Lee KE;Toms AV;Li Y;Dunn GP;Chan E;Thai T;Yang S;Ficarro SB;Marto JA;Jeon H;Hahn WC;Barbie DA;Eck MJ
Upon stimulation by pathogen-associated inflammatory signals, the atypical IκB kinase TBK1 induces type-I interferon expression and modulates NF-κB signaling. Here we describe the 2.4 Å-resolution crystal structure of nearly full-length TBK1 in complex with specific inhibitors. The structure reveals a novel dimeric assembly, created by an extensive network of interactions among the kinase, ubiquitin-like (ULD) and scaffold/dimerization (SDD) domains. An intact TBK1 dimer undergoes K63-linked polyubiquitination on Lysine 30 and Lysine 401, and these modifications are required for TBK1 activity. The ubiquitination sites and dimer contacts are conserved in the close homolog IKKε, but not in the canonical IκB kinase IKKβ, which assembles in an unrelated manner. The multidomain architecture of TBK1 provides a structural platform for integrating ubiquitination with kinase activation and IRF3 phosphorylation. The structure of TBK1 will facilitate studies of the atypical IκB kinases in normal and disease physiology and will further development of more specific inhibitors that may be useful as anti-cancer or anti-inflammatory agents.
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