cyclin B1-CDK1 complex / positive regulation of mitochondrial ATP synthesis coupled electron transport / Mitotic Prophase / positive regulation of anaphase-promoting complex-dependent catabolic process / G2/M DNA replication checkpoint / E2F-enabled inhibition of pre-replication complex formation / positive regulation of attachment of spindle microtubules to kinetochore / Depolymerization of the Nuclear Lamina / MASTL Facilitates Mitotic Progression / protein K27-linked ubiquitination ...cyclin B1-CDK1 complex / positive regulation of mitochondrial ATP synthesis coupled electron transport / Mitotic Prophase / positive regulation of anaphase-promoting complex-dependent catabolic process / G2/M DNA replication checkpoint / E2F-enabled inhibition of pre-replication complex formation / positive regulation of attachment of spindle microtubules to kinetochore / Depolymerization of the Nuclear Lamina / MASTL Facilitates Mitotic Progression / protein K27-linked ubiquitination / positive regulation of exit from mitosis / regulation of meiotic nuclear division / free ubiquitin chain polymerization / protein K29-linked ubiquitination / positive regulation of synapse maturation / Conversion from APC/C:Cdc20 to APC/C:Cdh1 in late anaphase / regulation of mitotic cell cycle spindle assembly checkpoint / Activation of NIMA Kinases NEK9, NEK6, NEK7 / Inactivation of APC/C via direct inhibition of the APC/C complex / APC/C:Cdc20 mediated degradation of mitotic proteins / Phosphorylation of Emi1 / patched binding / anaphase-promoting complex / protein branched polyubiquitination / Aberrant regulation of mitotic exit in cancer due to RB1 defects / metaphase/anaphase transition of mitotic cell cycle / regulation of meiotic cell cycle / anaphase-promoting complex-dependent catabolic process / lens fiber cell differentiation / positive regulation of synaptic plasticity / Transcriptional regulation by RUNX2 / regulation of exit from mitosis / Nuclear Pore Complex (NPC) Disassembly / Phosphorylation of the APC/C / anaphase-promoting complex binding / (E3-independent) E2 ubiquitin-conjugating enzyme / protein K6-linked ubiquitination / outer kinetochore / positive regulation of mitotic metaphase/anaphase transition / positive regulation of dendrite morphogenesis / ubiquitin ligase activator activity / positive regulation of ubiquitin protein ligase activity / Initiation of Nuclear Envelope (NE) Reformation / Polo-like kinase mediated events / protein K11-linked ubiquitination / cyclin-dependent protein serine/threonine kinase activator activity / Golgi Cisternae Pericentriolar Stack Reorganization / Condensation of Prometaphase Chromosomes / enzyme-substrate adaptor activity / regulation of mitotic metaphase/anaphase transition / exit from mitosis / cyclin-dependent protein serine/threonine kinase regulator activity / ubiquitin-ubiquitin ligase activity / E2 ubiquitin-conjugating enzyme / mitotic metaphase chromosome alignment / mitotic G2 DNA damage checkpoint signaling / microtubule organizing center / ubiquitin conjugating enzyme activity / Regulation of APC/C activators between G1/S and early anaphase / ubiquitin-like protein ligase binding / cullin family protein binding / Transcriptional Regulation by VENTX / negative regulation of cellular senescence / protein K63-linked ubiquitination / ubiquitin ligase complex / positive regulation of axon extension / ubiquitin-like ligase-substrate adaptor activity / Chk1/Chk2(Cds1) mediated inactivation of Cyclin B:Cdk1 complex / heterochromatin / Regulation of MITF-M-dependent genes involved in cell cycle and proliferation / protein K48-linked ubiquitination / Cyclin A/B1/B2 associated events during G2/M transition / Cyclin A:Cdk2-associated events at S phase entry / Nuclear events stimulated by ALK signaling in cancer / positive regulation of G2/M transition of mitotic cell cycle / Resolution of Sister Chromatid Cohesion / APC/C:Cdc20 mediated degradation of Cyclin B / APC-Cdc20 mediated degradation of Nek2A / positive regulation of mitotic cell cycle / mitotic spindle organization / nuclear periphery / TP53 Regulates Transcription of Genes Involved in G2 Cell Cycle Arrest / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / regulation of mitotic cell cycle / Condensation of Prophase Chromosomes / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / SCF-beta-TrCP mediated degradation of Emi1 / Assembly of the pre-replicative complex / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / brain development / protein modification process / kinetochore / CDK-mediated phosphorylation and removal of Cdc6 / mitotic spindle / spindle / spindle pole / G1/S transition of mitotic cell cycle / positive regulation of fibroblast proliferation Similarity search - Function
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)
T32GM008570
United States
Vienna Science and Technology Fund (WWTF)
WWTF-LS19-029
Austria
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)
R35GM128855
United States
National Science Foundation (NSF, United States)
DGE-1650116
United States
Citation
Journal: Nat Struct Mol Biol / Year: 2023 Title: Time-resolved cryo-EM (TR-EM) analysis of substrate polyubiquitination by the RING E3 anaphase-promoting complex/cyclosome (APC/C). Authors: Tatyana Bodrug / Kaeli A Welsh / Derek L Bolhuis / Ethan Paulаkonis / Raquel C Martinez-Chacin / Bei Liu / Nicholas Pinkin / Thomas Bonacci / Liying Cui / Pengning Xu / Olivia Roscow / ...Authors: Tatyana Bodrug / Kaeli A Welsh / Derek L Bolhuis / Ethan Paulаkonis / Raquel C Martinez-Chacin / Bei Liu / Nicholas Pinkin / Thomas Bonacci / Liying Cui / Pengning Xu / Olivia Roscow / Sascha Josef Amann / Irina Grishkovskaya / Michael J Emanuele / Joseph S Harrison / Joshua P Steimel / Klaus M Hahn / Wei Zhang / Ellen D Zhong / David Haselbach / Nicholas G Brown / Abstract: Substrate polyubiquitination drives a myriad of cellular processes, including the cell cycle, apoptosis and immune responses. Polyubiquitination is highly dynamic, and obtaining mechanistic insight ...Substrate polyubiquitination drives a myriad of cellular processes, including the cell cycle, apoptosis and immune responses. Polyubiquitination is highly dynamic, and obtaining mechanistic insight has thus far required artificially trapped structures to stabilize specific steps along the enzymatic process. So far, how any ubiquitin ligase builds a proteasomal degradation signal, which is canonically regarded as four or more ubiquitins, remains unclear. Here we present time-resolved cryogenic electron microscopy studies of the 1.2 MDa E3 ubiquitin ligase, known as the anaphase-promoting complex/cyclosome (APC/C), and its E2 co-enzymes (UBE2C/UBCH10 and UBE2S) during substrate polyubiquitination. Using cryoDRGN (Deep Reconstructing Generative Networks), a neural network-based approach, we reconstruct the conformational changes undergone by the human APC/C during polyubiquitination, directly visualize an active E3-E2 pair modifying its substrate, and identify unexpected interactions between multiple ubiquitins with parts of the APC/C machinery, including its coactivator CDH1. Together, we demonstrate how modification of substrates with nascent ubiquitin chains helps to potentiate processive substrate polyubiquitination, allowing us to model how a ubiquitin ligase builds a proteasomal degradation signal.
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