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-Structure paper
タイトル | Cullin-RING ligases employ geometrically optimized catalytic partners for substrate targeting. |
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ジャーナル・号・ページ | Mol Cell, Vol. 84, Issue 7, Page 1304-1320.e16, Year 2024 |
掲載日 | 2024年4月4日 |
著者 | Jerry Li / Nicholas Purser / Joanna Liwocha / Daniel C Scott / Holly A Byers / Barbara Steigenberger / Spencer Hill / Ishita Tripathi-Giesgen / Trent Hinkle / Fynn M Hansen / J Rajan Prabu / Senthil K Radhakrishnan / Donald S Kirkpatrick / Kurt M Reichermeier / Brenda A Schulman / Gary Kleiger / |
PubMed 要旨 | Cullin-RING ligases (CRLs) ubiquitylate specific substrates selected from other cellular proteins. Substrate discrimination and ubiquitin transferase activity were thought to be strictly separated. ...Cullin-RING ligases (CRLs) ubiquitylate specific substrates selected from other cellular proteins. Substrate discrimination and ubiquitin transferase activity were thought to be strictly separated. Substrates are recognized by substrate receptors, such as Fbox or BCbox proteins. Meanwhile, CRLs employ assorted ubiquitin-carrying enzymes (UCEs, which are a collection of E2 and ARIH-family E3s) specialized for either initial substrate ubiquitylation (priming) or forging poly-ubiquitin chains. We discovered specific human CRL-UCE pairings governing substrate priming. The results reveal pairing of CUL2-based CRLs and UBE2R-family UCEs in cells, essential for efficient PROTAC-induced neo-substrate degradation. Despite UBE2R2's intrinsic programming to catalyze poly-ubiquitylation, CUL2 employs this UCE for geometrically precise PROTAC-dependent ubiquitylation of a neo-substrate and for rapid priming of substrates recruited to diverse receptors. Cryo-EM structures illuminate how CUL2-based CRLs engage UBE2R2 to activate substrate ubiquitylation. Thus, pairing with a specific UCE overcomes E2 catalytic limitations to drive substrate ubiquitylation and targeted protein degradation. |
リンク | Mol Cell / PubMed:38382526 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.44 - 6.46 Å |
構造データ | EMDB-18207: Ubiquitin ligation to substrate by a cullin-RING E3 ligase & Cdc34: NEDD8-CUL2-RBX1-ELOB/C-FEM1C with trapped UBE2R2~donor UB-Sil1 peptide, Glacios map EMDB-18230, PDB-8q7r: EMDB-18915, PDB-8r5h: |
化合物 |
ChemComp-U9O: ChemComp-ZN: ChemComp-SY8: ChemComp-759: |
由来 |
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キーワード | LIGASE / CUL2 / FEM1C / ELOBC / SIL1 / Ubiquitin / Ubiquitin Ligase / Ubiquitylation / monoubiquitylation / Elongin B / Elongin C / VHL / BRD4 / MZ1 / PROTAC / NEDD8 / RBX1 |