5Y3T
Crystal structure of hetero-trimeric core of LUBAC: HOIP double-UBA complexed with HOIL-1L UBL and SHARPIN UBL
Summary for 5Y3T
Entry DOI | 10.2210/pdb5y3t/pdb |
Descriptor | RanBP-type and C3HC4-type zinc finger-containing protein 1, E3 ubiquitin-protein ligase RNF31, Sharpin, ... (5 entities in total) |
Functional Keywords | hoip, hoil-1l, sharpin, linear-ubiquitin assembly complex, nf-kb activation, lubac tethering motif, lubac stabilization, ligase |
Biological source | Mus musculus (Mouse) More |
Total number of polymer chains | 3 |
Total formula weight | 53771.72 |
Authors | Tokunaga, A.,Fujita, H.,Ariyoshi, M.,Ohki, I.,Tochio, H.,Iwai, K.,Shirakawa, M. (deposition date: 2017-07-31, release date: 2018-05-02, Last modification date: 2023-11-22) |
Primary citation | Fujita, H.,Tokunaga, A.,Shimizu, S.,Whiting, A.L.,Aguilar-Alonso, F.,Takagi, K.,Walinda, E.,Sasaki, Y.,Shimokawa, T.,Mizushima, T.,Ohki, I.,Ariyoshi, M.,Tochio, H.,Bernal, F.,Shirakawa, M.,Iwai, K. Cooperative Domain Formation by Homologous Motifs in HOIL-1L and SHARPIN Plays A Crucial Role in LUBAC Stabilization. Cell Rep, 23:1192-1204, 2018 Cited by PubMed Abstract: The linear ubiquitin chain assembly complex (LUBAC) participates in inflammatory and oncogenic signaling by conjugating linear ubiquitin chains to target proteins. LUBAC consists of the catalytic HOIP subunit and two accessory subunits, HOIL-1L and SHARPIN. Interactions between the ubiquitin-associated (UBA) domains of HOIP and the ubiquitin-like (UBL) domains of two accessory subunits are involved in LUBAC stabilization, but the precise molecular mechanisms underlying the formation of stable trimeric LUBAC remain elusive. We solved the co-crystal structure of the binding regions of the trimeric LUBAC complex and found that LUBAC-tethering motifs (LTMs) located N terminally to the UBL domains of HOIL-1L and SHARPIN heterodimerize and fold into a single globular domain. This interaction is resistant to dissociation and plays a critical role in stabilizing trimeric LUBAC. Inhibition of LTM-mediated HOIL-1L/SHARPIN dimerization profoundly attenuated the function of LUBAC, suggesting LTM as a superior target of LUBAC destabilization for anticancer therapeutics. PubMed: 29694895DOI: 10.1016/j.celrep.2018.03.112 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (2.4 Å) |
Structure validation
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