1
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Shimizu H, Hosseini-Alghaderi S, Woodcock SA, Baron M. Alternative mechanisms of Notch activation by partitioning into distinct endosomal domains. J Cell Biol 2024; 223:e202211041. [PMID: 38358349 PMCID: PMC10868400 DOI: 10.1083/jcb.202211041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/17/2023] [Accepted: 01/30/2024] [Indexed: 02/16/2024] Open
Abstract
Different membrane microdomain compositions provide unique environments that can regulate signaling receptor function. We identify microdomains on the endosome membrane of Drosophila endosomes, enriched in lipid-raft or clathrin/ESCRT-0, which are associated with Notch activation by distinct, ligand-independent mechanisms. Transfer of Notch between microdomains is regulated by Deltex and Suppressor of deltex ubiquitin ligases and is limited by a gate-keeper role for ESCRT complexes. Ubiquitination of Notch by Deltex recruits it to the clathrin/ESCRT-0 microdomain and enhances Notch activation by an ADAM10-independent/TRPML-dependent mechanism. This requirement for Deltex is bypassed by the downregulation of ESCRT-III. In contrast, while ESCRT-I depletion also activates Notch, it does so by an ADAM10-dependent/TRPML-independent mechanism and Notch is retained in the lipid raft-like microdomain. In the absence of such endosomal perturbation, different activating Notch mutations also localize to different microdomains and are activated by different mechanisms. Our findings demonstrate the interplay between Notch regulators, endosomal trafficking components, and Notch genetics, which defines membrane locations and activation mechanisms.
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Affiliation(s)
- Hideyuki Shimizu
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Samira Hosseini-Alghaderi
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Simon A. Woodcock
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Martin Baron
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
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2
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You S, Xu J, Guo Y, Guo X, Zhang Y, Zhang N, Sun G, Sun Y. E3 ubiquitin ligase WWP2 as a promising therapeutic target for diverse human diseases. Mol Aspects Med 2024; 96:101257. [PMID: 38430667 DOI: 10.1016/j.mam.2024.101257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 02/05/2024] [Accepted: 02/13/2024] [Indexed: 03/05/2024]
Abstract
Mammalian E3 ubiquitin ligases have emerged in recent years as critical regulators of cellular homeostasis due to their roles in targeting substrate proteins for ubiquitination and triggering subsequent downstream signals. In this review, we describe the multiple roles of WWP2, an E3 ubiquitin ligase with unique and important functions in regulating a wide range of biological processes, including DNA repair, gene expression, signal transduction, and cell-fate decisions. As such, WWP2 has evolved to play a key role in normal physiology and diseases, such as tumorigenesis, skeletal development and diseases, immune regulation, cardiovascular disease, and others. We attempt to provide an overview of the biochemical, physiological, and pathophysiological roles of WWP2, as well as open questions for future research, particularly in the context of putative therapeutic opportunities.
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Affiliation(s)
- Shilong You
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jiaqi Xu
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yushan Guo
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaofan Guo
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Ying Zhang
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China; Institute of Health Sciences, China Medical University, Shenyang, Liaoning, China.
| | - Naijin Zhang
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China; Institute of Health Sciences, China Medical University, Shenyang, Liaoning, China; NHC Key Laboratory of Advanced Reproductive Medicine and Fertility, National Health Commission, China Medical University, Shenyang, Liaoning, China.
| | - Guozhe Sun
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China.
| | - Yingxian Sun
- Department of Cardiology, First Hospital of China Medical University, Shenyang, Liaoning, China; Institute of Health Sciences, China Medical University, Shenyang, Liaoning, China.
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3
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Sewduth RN, Carai P, Ivanisevic T, Zhang M, Jang H, Lechat B, Van Haver D, Impens F, Nussinov R, Jones E, Sablina A. Spatial Mechano-Signaling Regulation of GTPases through Non-Degradative Ubiquitination. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303367. [PMID: 37946677 PMCID: PMC10754123 DOI: 10.1002/advs.202303367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/14/2023] [Indexed: 11/12/2023]
Abstract
Blood flow produces shear stress exerted on the endothelial layer of the vessels. Spatial characterization of the endothelial proteome is required to uncover the mechanisms of endothelial activation by shear stress, as blood flow varies in the vasculature. An integrative ubiquitinome and proteome analysis of shear-stressed endothelial cells demonstrated that the non-degradative ubiquitination of several GTPases is regulated by mechano-signaling. Spatial analysis reveals increased ubiquitination of the small GTPase RAP1 in the descending aorta, a region exposed to laminar shear stress. The ubiquitin ligase WWP2 is identified as a novel regulator of RAP1 ubiquitination during shear stress response. Non-degradative ubiquitination fine-tunes the function of GTPases by modifying their interacting network. Specifically, WWP2-mediated RAP1 ubiquitination at lysine 31 switches the balance from the RAP1/ Talin 1 (TLN1) toward RAP1/ Afadin (AFDN) or RAP1/ RAS Interacting Protein 1 (RASIP1) complex formation, which is essential to suppress shear stress-induced reactive oxygen species (ROS) production and maintain endothelial barrier integrity. Increased ROS production in endothelial cells in the descending aorta of endothelial-specific Wwp2-knockout mice leads to increased levels of oxidized lipids and inflammation. These results highlight the importance of the spatially regulated non-degradative ubiquitination of GTPases in endothelial mechano-activation.
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Affiliation(s)
- Raj N. Sewduth
- VIB‐KU Leuven Center for Cancer BiologyVIBLeuven3000Belgium
- Department of OncologyKU LeuvenHerestraat 49Leuven3000Belgium
| | - Paolo Carai
- Department of Cardiovascular SciencesCentre for Molecular and Vascular BiologyKU LeuvenHerestraat 49Leuven3000Belgium
| | - Tonci Ivanisevic
- VIB‐KU Leuven Center for Cancer BiologyVIBLeuven3000Belgium
- Department of OncologyKU LeuvenHerestraat 49Leuven3000Belgium
| | - Mingzhen Zhang
- Computational Structural Biology SectionFrederick National Laboratory for Cancer Research in the Laboratory of Cancer ImmunoMetabolismNational Cancer InstituteFrederickMD21702USA
| | - Hyunbum Jang
- Computational Structural Biology SectionFrederick National Laboratory for Cancer Research in the Laboratory of Cancer ImmunoMetabolismNational Cancer InstituteFrederickMD21702USA
| | - Benoit Lechat
- VIB‐KU Leuven Center for Cancer BiologyVIBLeuven3000Belgium
- Department of OncologyKU LeuvenHerestraat 49Leuven3000Belgium
| | - Delphi Van Haver
- VIB‐UGent Center for Medical BiotechnologyTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
- Department of Biomolecular MedicineGhent UniversityTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
- VIB Proteomics CoreTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
| | - Francis Impens
- VIB‐UGent Center for Medical BiotechnologyTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
- Department of Biomolecular MedicineGhent UniversityTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
- VIB Proteomics CoreTechnologiepark‐Zwijnaarde 75Ghent9052Belgium
| | - Ruth Nussinov
- Computational Structural Biology SectionFrederick National Laboratory for Cancer Research in the Laboratory of Cancer ImmunoMetabolismNational Cancer InstituteFrederickMD21702USA
- Department of Human Molecular Genetics and BiochemistrySackler School of MedicineTel Aviv UniversityTel Aviv69978Israel
| | - Elizabeth Jones
- Department of Cardiovascular SciencesCentre for Molecular and Vascular BiologyKU LeuvenHerestraat 49Leuven3000Belgium
- Department of CardiologyCARIM School for Cardiovascular DiseasesMaastricht UniversityUniversiteitssingel 50Maastricht6229 ERThe Netherlands
| | - Anna Sablina
- VIB‐KU Leuven Center for Cancer BiologyVIBLeuven3000Belgium
- Department of OncologyKU LeuvenHerestraat 49Leuven3000Belgium
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4
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Wedegaertner H, Bosompra O, Kufareva I, Trejo J. Divergent regulation of α-arrestin ARRDC3 function by ubiquitination. Mol Biol Cell 2023; 34:ar93. [PMID: 37223976 PMCID: PMC10398895 DOI: 10.1091/mbc.e23-02-0055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/14/2023] [Accepted: 05/19/2023] [Indexed: 05/25/2023] Open
Abstract
The α-arrestin ARRDC3 is a recently discovered tumor suppressor in invasive breast cancer that functions as a multifaceted adaptor protein to control protein trafficking and cellular signaling. However, the molecular mechanisms that control ARRDC3 function are unknown. Other arrestins are known to be regulated by posttranslational modifications, suggesting that ARRDC3 may be subject to similar regulatory mechanisms. Here we report that ubiquitination is a key regulator of ARRDC3 function and is mediated primarily by two proline-rich PPXY motifs in the ARRDC3 C-tail domain. Ubiquitination and the PPXY motifs are essential for ARRDC3 function in regulating GPCR trafficking and signaling. Additionally, ubiquitination and the PPXY motifs mediate ARRDC3 protein degradation, dictate ARRDC3 subcellular localization, and are required for interaction with the NEDD4-family E3 ubiquitin ligase WWP2. These studies demonstrate a role for ubiquitination in regulating ARRDC3 function and reveal a mechanism by which ARRDC3 divergent functions are controlled.
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Affiliation(s)
- Helen Wedegaertner
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA92093
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA92093
| | - Oye Bosompra
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA92093
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA92093
| | - Irina Kufareva
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA92093
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA92093
| | - JoAnn Trejo
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA92093
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5
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Tian X, Chen Y, Peng Z, Lin Q, Sun A. NEDD4 E3 ubiquitin ligases: promising biomarkers and therapeutic targets for cancer. Biochem Pharmacol 2023:115641. [PMID: 37307883 DOI: 10.1016/j.bcp.2023.115641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 06/14/2023]
Abstract
Accumulating evidence has demonstrated that NEDD4 E3 ubiquitin ligase family plays a pivotal oncogenic role in a variety of malignancies via mediating ubiquitin dependent degradation processes. Moreover, aberrant expression of NEDD4 E3 ubiquitin ligases is often indicative of cancer progression and correlated with poor prognosis. In this review, we are going to address association of expression of NEDD4 E3 ubiquitin ligases with cancers, the signaling pathways and the molecular mechanisms by which the NEDD4 E3 ubiquitin ligases regulate oncogenesis and progression, and the therapies targeting the NEDD4 E3 ubiquitin ligases. This review provides the systematic and comprehensive summary of the latest research status of E3 ubiquitin ligases in the NEDD4 subfamily, and proposes that NEDD4 family E3 ubiquitin ligases are promising anti-cancer drug targets, aiming to provide research direction for clinical targeting of NEDD4 E3 ubiquitin ligase therapy.
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Affiliation(s)
- Xianyan Tian
- School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, China
| | - Yifei Chen
- School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, China
| | - Ziluo Peng
- School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, China
| | - Qiong Lin
- School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, China
| | - Aiqin Sun
- School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, China.
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6
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Zhu J, Peng Z, Tian X, Wu T, Sun A, Yang W, Lin Q. Activation of E3 ubiquitin ligase WWP2 by non-receptor tyrosine kinase ACK1. IUBMB Life 2023. [PMID: 36773333 DOI: 10.1002/iub.2705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 01/19/2023] [Indexed: 02/13/2023]
Abstract
WW domain containing E3 ubiquitin protein ligase 2 (WWP2) is a member of the NEDD4 E3 ubiquitin ligase family. WWP2 ligase activity is regulated by the 2, 3-linker auto-inhibition. Tyrosine phosphorylation of the 2, 3-linker was identified as an activating means for releasing the auto-inhibition of WWP2. However, the tyrosine kinase (TK) for the phosphorylation and activation remains unknown. In this report, we have found that non-receptor TK ACK1 binds to the WW3 domain of WWP2 and phosphorylates WWP2. ACK1 phosphorylates WWP2 at the 2, 3-linker and partially activates the ubiquitination ligase activity. Unexpectedly, tyrosine phosphorylation of the 2, 3-linker seems not a major mode for activation of WWP2, as ACK1 causes much higher activation of the 2, 3-linker tyrosine phosphorylation defective mutants of WWP2 than that of wild-type WWP2. Furthermore, epidermal growth factor (EGF) stimulates tyrosine phosphorylation of WWP2 and this EGF-stimulated phosphorylation of WWP2 is mediated by ACK1. Finally, knockdown of WWP2 by shWWP2 inhibits the EGF-dependent cell proliferation of lung cancer A549 cells, suggesting that WWP2 may function in the EGFR signaling in lung cancer progression. Taken together, our findings have revealed a novel mechanism underlying activation of WWP2.
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Affiliation(s)
- Jun Zhu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Ziluo Peng
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xianyan Tian
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Tiantian Wu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Aiqin Sun
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Wannian Yang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Qiong Lin
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
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7
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E3 Ubiquitin Ligase Regulators of Notch Receptor Endocytosis: From Flies to Humans. Biomolecules 2022; 12:biom12020224. [PMID: 35204725 PMCID: PMC8961608 DOI: 10.3390/biom12020224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/18/2022] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Notch is a developmental receptor, conserved in the evolution of the metazoa, which regulates cell fate proliferation and survival in numerous developmental contexts, and also regulates tissue renewal and repair in adult organisms. Notch is activated by proteolytic removal of its extracellular domain and the subsequent release of its intracellular domain, which then acts in the nucleus as part of a transcription factor complex. Numerous regulatory mechanisms exist to tune the amplitude, duration and spatial patterning of this core signalling mechanism. In Drosophila, Deltex (Dx) and Suppressor of dx (Su(dx)) are E3 ubiquitin ligases which interact with the Notch intracellular domain to regulate its endocytic trafficking, with impacts on both ligand-dependent and ligand-independent signal activation. Homologues of Dx and Su(dx) have been shown to also interact with one or more of the four mammalian Notch proteins and other target substrates. Studies have shown similarities, specialisations and diversifications of the roles of these Notch regulators. This review collates together current research on vertebrate Dx and Su(dx)-related proteins, provides an overview of their various roles, and discusses their contributions to cell fate regulation and disease.
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8
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E3 ubiquitin-protein ligase 2 inhibits cell proliferation, migration, and invasion of non-small cell lung cancer through ubiquitination of Notch1. Acta Histochem 2022; 124:151818. [PMID: 34971948 DOI: 10.1016/j.acthis.2021.151818] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 10/21/2021] [Accepted: 11/11/2021] [Indexed: 12/30/2022]
Abstract
This study aimed to explore the role of MIB2 in non-small cell lung cancer (NSCLC) and the underlying mechanism. Quantitative real-time PCR (QRT-PCR) and western blot were first performed to detect MIB2 expression in tumor tissues obtained from NSCLC patients (n = 30) and NSCLC cells, respectively. 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) and transwell assays were then used to examine the effect of MIB2 on the proliferation, migration and invasion of NSCLC cells. Western blot was further performed to examine the effect of Mind bomb 2 (MIB2), an E3 ligase on Notch1 protein and its ubiquitination. MIB2 was significantly down-regulated in NSCLC tissues and cells, both in mRNA and protein level. MIB2 also note worthily inhibited the proliferation, migration, and invasion of NSCLC cells. Furthermore, MIB2 only down-regulated Notch1 protein level, while facilitated the ubiquitination of Notch1. Additionally, Notch1 significantly relieved the repressed proliferation, migration and invasion of NSCLC cells induced by MIB2. Conclusively, MIB2 inhibited cell proliferation, migration and invasion via inducing Notch1 ubiquitination and degradation in NSCLC.
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9
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Sharma M, Castro-Piedras I, Rasha F, Ramachandran S, Sennoune SR, Furr K, Almodovar S, Ganapathy V, Grisham MB, Rahman RL, Pruitt K. Dishevelled-1 DIX and PDZ domain lysine residues regulate oncogenic Wnt signaling. Oncotarget 2021; 12:2234-2251. [PMID: 34733415 PMCID: PMC8555683 DOI: 10.18632/oncotarget.28089] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/24/2021] [Indexed: 11/26/2022] Open
Abstract
DVL proteins are central mediators of the Wnt pathway and relay complex input signals into different branches of the Wnt signaling network. However, molecular mechanism(s) that regulate DVL-mediated relay of Wnt signals still remains unclear. Here, for the first time, we elucidate the functional significance of three DVL-1 lysines (K/Lys) which are subject to post-translational acetylation. We demonstrate that K34 Lys residue in the DIX domain regulates subcellular localization of β-catenin, thereby influencing downstream Wnt target gene expression. Additionally, we show that K69 (DIX domain) and K285 (PDZ domain) regulate binding of DVL-1 to Wnt target gene promoters and modulate expression of Wnt target genes including CMYC, OCT4, NANOG, and CCND1, in cell line models and xenograft tumors. Finally, we report that conserved DVL-1 lysines modulate various oncogenic functions such as cell migration, proliferation, cell-cycle progression, 3D-spheroid formation and in-vivo tumor growth in breast cancer models. Collectively, these findings highlight the importance of DVL-1 domain-specific lysines which were recently shown to be acetylated and characterize their influence on Wnt signaling. These site-specific modifications may be subject to regulation by therapeutics already in clinical use (lysine deacetylase inhibitors such as Panobinostat and Vorinostat) or may possibly have prognostic utility in translational efforts that seek to modulate dysfunctional Wnt signaling.
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Affiliation(s)
- Monica Sharma
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Isabel Castro-Piedras
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Fahmida Rasha
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Sabarish Ramachandran
- Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Souad R. Sennoune
- Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Kathryn Furr
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Sharilyn Almodovar
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Vadivel Ganapathy
- Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Matthew B. Grisham
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | | | - Kevin Pruitt
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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10
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Beitia GJ, Rutherford TJ, Freund SMV, Pelham HR, Bienz M, Gammons MV. Regulation of Dishevelled DEP domain swapping by conserved phosphorylation sites. Proc Natl Acad Sci U S A 2021; 118:e2103258118. [PMID: 34155117 PMCID: PMC8256032 DOI: 10.1073/pnas.2103258118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Wnt signals bind to Frizzled receptors to trigger canonical and noncanonical signaling responses that control cell fates during animal development and tissue homeostasis. All Wnt signals are relayed by the hub protein Dishevelled. During canonical (β-catenin-dependent) signaling, Dishevelled assembles signalosomes via dynamic head-to-tail polymerization of its Dishevelled and Axin (DIX) domain, which are cross-linked by its Dishevelled, Egl-10, and Pleckstrin (DEP) domain through a conformational switch from monomer to domain-swapped dimer. The domain-swapped conformation of DEP masks the site through which Dishevelled binds to Frizzled, implying that DEP domain swapping results in the detachment of Dishevelled from Frizzled. This would be incompatible with noncanonical Wnt signaling, which relies on long-term association between Dishevelled and Frizzled. It is therefore likely that DEP domain swapping is differentially regulated during canonical and noncanonical Wnt signaling. Here, we use NMR spectroscopy and cell-based assays to uncover intermolecular contacts in the DEP dimer that are essential for its stability and for Dishevelled function in relaying canonical Wnt signals. These contacts are mediated by an intrinsically structured sequence spanning a conserved phosphorylation site upstream of the DEP domain that serves to clamp down the swapped N-terminal α-helix onto the structural core of a reciprocal DEP molecule in the domain-swapped configuration. Mutations of this phosphorylation site and its cognate surface on the reciprocal DEP core attenuate DEP-dependent dimerization of Dishevelled and its canonical signaling activity in cells without impeding its binding to Frizzled. We propose that phosphorylation of this crucial residue could be employed to switch off canonical Wnt signaling.
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Affiliation(s)
- Gonzalo J Beitia
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
| | - Trevor J Rutherford
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
| | - Stefan M V Freund
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
| | - Hugh R Pelham
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
| | - Mariann Bienz
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
| | - Melissa V Gammons
- Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, United Kingdom
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11
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Adaptors as the regulators of HECT ubiquitin ligases. Cell Death Differ 2021; 28:455-472. [PMID: 33402750 DOI: 10.1038/s41418-020-00707-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 11/04/2020] [Accepted: 11/04/2020] [Indexed: 12/15/2022] Open
Abstract
The HECT (homologous to E6AP C-terminus) ubiquitin ligases (E3s) are a small family of highly conserved enzymes involved in diverse cellular functions and pathological conditions. Characterised by a C-terminal HECT domain that accepts ubiquitin from E2 ubiquitin conjugating enzymes, these E3s regulate key signalling pathways. The activity and functional regulation of HECT E3s are controlled by several factors including post-translational modifications, inter- and intramolecular interactions and binding of co-activators and adaptor proteins. In this review, we focus on the regulation of HECT E3s by accessory proteins or adaptors and discuss various ways by which adaptors mediate their regulatory roles to affect physiological outcomes. We discuss common features that are conserved from yeast to mammals, regardless of the type of E3s as well as shed light on recent discoveries explaining some existing enigmas in the field.
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12
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Gammons MV, Renko M, Flack JE, Mieszczanek J, Bienz M. Feedback control of Wnt signaling based on ultrastable histidine cluster co-aggregation between Naked/NKD and Axin. eLife 2020; 9:e59879. [PMID: 33025907 PMCID: PMC7581431 DOI: 10.7554/elife.59879] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 10/06/2020] [Indexed: 12/20/2022] Open
Abstract
Feedback control is a universal feature of cell signaling pathways. Naked/NKD is a widely conserved feedback regulator of Wnt signaling which controls animal development and tissue homeostasis. Naked/NKD destabilizes Dishevelled, which assembles Wnt signalosomes to inhibit the β-catenin destruction complex via recruitment of Axin. Here, we discover that the molecular mechanism underlying Naked/NKD function relies on its assembly into ultra-stable decameric core aggregates via its conserved C-terminal histidine cluster (HisC). HisC aggregation is facilitated by Dishevelled and depends on accumulation of Naked/NKD during prolonged Wnt stimulation. Naked/NKD HisC cores co-aggregate with a conserved histidine cluster within Axin, to destabilize it along with Dishevelled, possibly via the autophagy receptor p62, which binds to HisC aggregates. Consistent with this, attenuated Wnt responses are observed in CRISPR-engineered flies and human epithelial cells whose Naked/NKD HisC has been deleted. Thus, HisC aggregation by Naked/NKD provides context-dependent feedback control of prolonged Wnt responses.
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Affiliation(s)
- Melissa V Gammons
- MRC Laboratory of Molecular Biology, Cambridge Biomedical CampusCambridgeUnited Kingdom
| | - Miha Renko
- MRC Laboratory of Molecular Biology, Cambridge Biomedical CampusCambridgeUnited Kingdom
| | - Joshua E Flack
- MRC Laboratory of Molecular Biology, Cambridge Biomedical CampusCambridgeUnited Kingdom
| | - Juliusz Mieszczanek
- MRC Laboratory of Molecular Biology, Cambridge Biomedical CampusCambridgeUnited Kingdom
| | - Mariann Bienz
- MRC Laboratory of Molecular Biology, Cambridge Biomedical CampusCambridgeUnited Kingdom
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13
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Nielsen CP, Jernigan KK, Diggins NL, Webb DJ, MacGurn JA. USP9X Deubiquitylates DVL2 to Regulate WNT Pathway Specification. Cell Rep 2020; 28:1074-1089.e5. [PMID: 31340145 PMCID: PMC6884140 DOI: 10.1016/j.celrep.2019.06.083] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 05/22/2019] [Accepted: 06/24/2019] [Indexed: 01/12/2023] Open
Abstract
The WNT signaling network is comprised of multiple receptors that relay various input signals via distinct transduction pathways to execute multiple complex and context-specific output processes. Integrity of the WNT signaling network relies on proper specification between canonical and noncanonical pathways, which presents a regulatory challenge given that several signal transducing elements are shared between pathways. Here, we report that USP9X, a deubiquitylase, and WWP1, an E3 ubiquitin ligase, regulate a ubiquitin rheostat on DVL2, a WNT signaling protein. Our findings indicate that USP9X-mediated deubiquitylation of DVL2 is required for canonical WNT activation, while increased DVL2 ubiquitylation is associated with localization to actin-rich projections and activation of the planar cell polarity (PCP) pathway. We propose that a WWP1-USP9X axis regulates a ubiquitin rheostat on DVL2 that specifies its participation in either canonical WNT or WNT-PCP pathways. These findings have important implications for therapeutic targeting of USP9X in human cancer. DVL2 is a signal transducing protein that participates in canonical and noncanonical WNT signaling relays. Here, Nielsen et al. report that the deubiquitylase USP9X and the E3 ubiquitin ligase WWP1 operate on DVL2 to establish a ubiquitin rheostat that contributes to WNT pathway specification in human breast cancer cells.
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Affiliation(s)
- Casey P Nielsen
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - Kristin K Jernigan
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - Nicole L Diggins
- Department of Biological Sciences, Vanderbilt University, Nashville, TN 37240, USA
| | - Donna J Webb
- Department of Biological Sciences, Vanderbilt University, Nashville, TN 37240, USA
| | - Jason A MacGurn
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA.
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14
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Alix E, Godlee C, Cerny O, Blundell S, Tocci R, Matthews S, Liu M, Pruneda JN, Swatek KN, Komander D, Sleap T, Holden DW. The Tumour Suppressor TMEM127 Is a Nedd4-Family E3 Ligase Adaptor Required by Salmonella SteD to Ubiquitinate and Degrade MHC Class II Molecules. Cell Host Microbe 2020; 28:54-68.e7. [PMID: 32526160 PMCID: PMC7342019 DOI: 10.1016/j.chom.2020.04.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/13/2020] [Accepted: 04/29/2020] [Indexed: 12/21/2022]
Abstract
The Salmonella enterica effector SteD depletes mature MHC class II (mMHCII) molecules from the surface of infected antigen-presenting cells through ubiquitination of the cytoplasmic tail of the mMHCII β chain. Here, through a genome-wide mutant screen of human antigen-presenting cells, we show that the NEDD4 family HECT E3 ubiquitin ligase WWP2 and a tumor-suppressing transmembrane protein of unknown biochemical function, TMEM127, are required for SteD-dependent ubiquitination of mMHCII. Although evidently not involved in normal regulation of mMHCII, TMEM127 was essential for SteD to suppress both mMHCII antigen presentation in mouse dendritic cells and MHCII-dependent CD4+ T cell activation. We found that TMEM127 contains a canonical PPxY motif, which was required for binding to WWP2. SteD bound to TMEM127 and enabled TMEM127 to interact with and induce ubiquitination of mature MHCII. Furthermore, SteD also underwent TMEM127- and WWP2-dependent ubiquitination, which both contributed to its degradation and augmented its activity on mMHCII.
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Affiliation(s)
- Eric Alix
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Camilla Godlee
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Ondrej Cerny
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Samkeliso Blundell
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Romina Tocci
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Sophie Matthews
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Mei Liu
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - Jonathan N Pruneda
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, Portland, OR 97239, USA
| | - Kirby N Swatek
- Ubiquitin Signalling Division, The Walter and Eliza Hall Institute of Medical Research, 1G Royale Parade, 3052 Parkville, Melbourne, Australia
| | - David Komander
- Department of Molecular Machines and Signaling, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Tabitha Sleap
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK
| | - David W Holden
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London SW7 2AZ, UK.
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15
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Activity of Smurf2 Ubiquitin Ligase Is Regulated by the Wnt Pathway Protein Dishevelled. Cells 2020; 9:cells9051147. [PMID: 32392721 PMCID: PMC7290506 DOI: 10.3390/cells9051147] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/01/2020] [Accepted: 05/04/2020] [Indexed: 01/17/2023] Open
Abstract
Wnt and BMP signaling pathways are two key molecular machineries regulating development and homeostasis. The efficient coordination of Wnt and BMP is essential in many developmental processes such as establishment of antero-posterior and dorso-ventral body axis, regulation of convergent extension, or development of various organ systems. SMAD ubiquitination regulatory factor (Smurf) family of E3 ubiquitin ligases are important and evolutionary conserved regulators of TGF-β/BMP signaling pathways. Smurf2 has been previously shown to regulate Wnt/planar cell polarity (PCP) signaling pathway by ubiquitinating Prickle1, one of the key components of PCP. We explored the role of Smurf2 in Wnt pathways in further detail and identified that Smurf2 is also a ubiquitin ligase of Dishevelled (DVL), the key cytoplasmic signal transducer in the Wnt pathway. Interestingly, the Smurf2 and DVL relationship expands beyond substrate-E3 ligase. We can show that DVL activates Smurf2, which allows Smurf2 to ubiquitinate its substrates from Wnt/PCP (Prickle1) as well as TGF-β/BMP (Smad2) pathways more efficiently. Using SMAD7 as an example of Smurf2 activator we show that DVL and SMAD7 both activates Smurf2 activity. In HEK293 cells the deficiency of DVL phenocopies absence of Smurf2 and leads to the increased phosphorylation of R-Smads. Smurf2-DVL connection provides a novel and intriguing point of crosstalk for Wnt and BMP pathways.
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16
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Fei Q, Zou Z, Roundtree IA, Sun HL, He C. YTHDF2 promotes mitotic entry and is regulated by cell cycle mediators. PLoS Biol 2020; 18:e3000664. [PMID: 32267835 PMCID: PMC7170294 DOI: 10.1371/journal.pbio.3000664] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 04/20/2020] [Accepted: 03/20/2020] [Indexed: 11/19/2022] Open
Abstract
The N6-methyladenosine (m6A) modification regulates mRNA stability and translation. Here, we show that transcriptomic m6A modification can be dynamic and the m6A reader protein YTH N6-methyladenosine RNA binding protein 2 (YTHDF2) promotes mRNA decay during cell cycle. Depletion of YTHDF2 in HeLa cells leads to the delay of mitotic entry due to overaccumulation of negative regulators of cell cycle such as Wee1-like protein kinase (WEE1). We demonstrate that WEE1 transcripts contain m6A modification, which promotes their decay through YTHDF2. Moreover, we found that YTHDF2 protein stability is dependent on cyclin-dependent kinase 1 (CDK1) activity. Thus, CDK1, YTHDF2, and WEE1 form a feedforward regulatory loop to promote mitotic entry. We further identified Cullin 1 (CUL1), Cullin 4A (CUL4A), damaged DNA-binding protein 1 (DDB1), and S-phase kinase-associated protein 2 (SKP2) as components of E3 ubiquitin ligase complexes that mediate YTHDF2 proteolysis. Our study provides insights into how cell cycle mediators modulate transcriptomic m6A modification, which in turn regulates the cell cycle.
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Affiliation(s)
- Qili Fei
- Department of Chemistry, The University of Chicago, Chicago, Illinois, United States of America
- Howard Hughes Medical Institute, The University of Chicago, Chicago, Illinois, United States of America
- Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, China
| | - Zhongyu Zou
- Department of Chemistry, The University of Chicago, Chicago, Illinois, United States of America
- Howard Hughes Medical Institute, The University of Chicago, Chicago, Illinois, United States of America
| | - Ian A. Roundtree
- Department of Chemistry, The University of Chicago, Chicago, Illinois, United States of America
- Howard Hughes Medical Institute, The University of Chicago, Chicago, Illinois, United States of America
- Medical Scientist Training Program, The University of Chicago, Chicago, Illinois, United States of America
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, Illinois, United States of America
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois, United States of America
| | - Hui-Lung Sun
- Department of Chemistry, The University of Chicago, Chicago, Illinois, United States of America
- Howard Hughes Medical Institute, The University of Chicago, Chicago, Illinois, United States of America
| | - Chuan He
- Department of Chemistry, The University of Chicago, Chicago, Illinois, United States of America
- Howard Hughes Medical Institute, The University of Chicago, Chicago, Illinois, United States of America
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, Illinois, United States of America
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois, United States of America
- * E-mail:
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17
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Sharma M, Molehin D, Castro-Piedras I, Martinez EG, Pruitt K. Acetylation of conserved DVL-1 lysines regulates its nuclear translocation and binding to gene promoters in triple-negative breast cancer. Sci Rep 2019; 9:16257. [PMID: 31700102 PMCID: PMC6838061 DOI: 10.1038/s41598-019-52723-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 10/22/2019] [Indexed: 12/15/2022] Open
Abstract
Dishevelled (DVL) proteins are central mediators of the Wnt signalling pathway and are versatile regulators of several cellular processes, yet little is known about their post-translational regulation. Acetylation is a reversible post-translational modification (PTM) which regulates the function of several non-histone proteins involved in tumorigenesis. Since we previously demonstrated that lysine deacetylase, SIRT-1, regulates DVL protein levels and its function, we reasoned that DVL could potentially be a substrate for SIRT-1 mediated deacetylation. To further examine the potential role of multiple families of lysine deacetylases in the post-translational regulation of DVL, we screened for novel acetylation sites using liquid chromatography mass-spectrometry (LC-MS/MS) analysis. Herein, we report 12 DVL-1 lysine residues that show differential acetylation in response to changes in oxygen tension and deacetylase inhibition in triple-negative breast cancer (TNBC). PTMs are well documented to influence protein activity, and cellular localization. We also identify that acetylation of two key lysine residues, K69 and K285, present on the DIX and PDZ domains respectively, promote nuclear over cytoplasmic localization of DVL-1, and influences its promoter binding and regulation of genes implicated in cancer. Collectively, these findings for the first time, uncover acetylation as a novel layer of regulation of DVL-1 proteins.
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Affiliation(s)
- Monica Sharma
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Deborah Molehin
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Isabel Castro-Piedras
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Edgar G Martinez
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Kevin Pruitt
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
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18
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Baloghova N, Lidak T, Cermak L. Ubiquitin Ligases Involved in the Regulation of Wnt, TGF-β, and Notch Signaling Pathways and Their Roles in Mouse Development and Homeostasis. Genes (Basel) 2019; 10:genes10100815. [PMID: 31623112 PMCID: PMC6826584 DOI: 10.3390/genes10100815] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/02/2019] [Accepted: 10/13/2019] [Indexed: 12/20/2022] Open
Abstract
The Wnt, TGF-β, and Notch signaling pathways are essential for the regulation of cellular polarity, differentiation, proliferation, and migration. Differential activation and mutual crosstalk of these pathways during animal development are crucial instructive forces in the initiation of the body axis and the development of organs and tissues. Due to the ability to initiate cell proliferation, these pathways are vulnerable to somatic mutations selectively producing cells, which ultimately slip through cellular and organismal checkpoints and develop into cancer. The architecture of the Wnt, TGF-β, and Notch signaling pathways is simple. The transmembrane receptor, activated by the extracellular stimulus, induces nuclear translocation of the transcription factor, which subsequently changes the expression of target genes. Nevertheless, these pathways are regulated by a myriad of factors involved in various feedback mechanisms or crosstalk. The most prominent group of regulators is the ubiquitin-proteasome system (UPS). To open the door to UPS-based therapeutic manipulations, a thorough understanding of these regulations at a molecular level and rigorous confirmation in vivo are required. In this quest, mouse models are exceptional and, thanks to the progress in genetic engineering, also an accessible tool. Here, we reviewed the current understanding of how the UPS regulates the Wnt, TGF-β, and Notch pathways and we summarized the knowledge gained from related mouse models.
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Affiliation(s)
- Nikol Baloghova
- Laboratory of Cancer Biology, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 252 42 Vestec, Czech Republic.
| | - Tomas Lidak
- Laboratory of Cancer Biology, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 252 42 Vestec, Czech Republic.
| | - Lukas Cermak
- Laboratory of Cancer Biology, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, 252 42 Vestec, Czech Republic.
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19
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Ruetalo N, Anders S, Stollmaier C, Jäckl M, Schütz-Stoffregen MC, Stefan N, Wolf C, Wiesner S. The WW1 Domain Enhances Autoinhibition in Smurf Ubiquitin Ligases. J Mol Biol 2019; 431:4834-4847. [PMID: 31628949 DOI: 10.1016/j.jmb.2019.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
Abstract
Downregulation of ubiquitin (Ub) ligase activity prevents premature ubiquitination and is critical for cellular homeostasis. Nedd4 Ub ligases share a common domain architecture and yet are regulated in distinct ways through interactions of the catalytic HECT domain with the N-terminal C2 domain or the central WW domain region. Smurf1 and Smurf2 are two highly related Nedd4 ligases with ~70% overall sequence identity. Here, we show that the Smurf1 C2 domain interacts with the HECT domain and inhibits ligase activity in trans. However, in contrast to Smurf2, we find that full-length Smurf1 is a highly active Ub ligase, and we can attribute this striking difference in regulation to the lack of one WW domain (WW1) in Smurf1. Using NMR spectroscopy and biochemical assays, we identified the WW1 region as an additional inhibitory element in Smurf2 that cooperates with the C2 domain to enhance HECT domain binding and Smurf2 inhibition. Our work provides important insights into Smurf regulation and highlights that the activities of highly related proteins can be controlled in distinct ways.
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Affiliation(s)
- Natalia Ruetalo
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany
| | - Samira Anders
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany
| | - Carsten Stollmaier
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany; Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany
| | - Magnus Jäckl
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany
| | - Mira C Schütz-Stoffregen
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany; Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany
| | - Nadine Stefan
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany
| | - Christine Wolf
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany
| | - Silke Wiesner
- Max Planck Institute for Developmental Biology, Max-Planck-Ring 5, 72076 Tübingen, Germany; Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany.
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20
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Ai L, Ren Y, Li Y, Chen H, Qian Y, Lu S, Xu A, Ren L, Zhao S, Chen Z, Chen Y, Xu J, Fang J. Synbindin deficiency inhibits colon carcinogenesis by attenuating Wnt cascade and balancing gut microbiome. Int J Cancer 2019; 145:206-220. [DOI: 10.1002/ijc.32074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/17/2018] [Accepted: 12/04/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Luoyan Ai
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Yimeng Ren
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Yiting Li
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Haoyan Chen
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Yun Qian
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Shiyuan Lu
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Antao Xu
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Linlin Ren
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Shuliang Zhao
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Zhaofei Chen
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Ying‐Xuan Chen
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Jie Xu
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Jing‐Yuan Fang
- State Key Laboratory for Oncogenes and Related Genes, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and HepatologyShanghai Institute of Digestive Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
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21
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Zhang R, Zhang J, Luo W, Luo Z, Shi S. WWP2 Is One Promising Novel Oncogene. Pathol Oncol Res 2018; 25:443-446. [PMID: 30415470 DOI: 10.1007/s12253-018-0506-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 10/15/2018] [Indexed: 12/25/2022]
Abstract
WWP2 is an E3 ubiquitin ligase and plays an important role in regulation of many cellular biological activities through ubiquitination and degradation of its substrates. Recently accumulating evidences indicate that WWP2 plays a crucial part in the pathogenesis in different types of tumors. In this report, the role of this gene especially in tumorigenesis was reviewed. WWP2 is dysregulated in various of tumors, and it promotes carcinogenesis mainly through PTEN/Akt signaling pathway. WWP2 also participates in anti-cancer agents' sensitivity, indicating WWP2 may be a novel target for cancer treatment. WWP2 is one promising novel oncogene.
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Affiliation(s)
- Rui Zhang
- Department of Thoracic Surgery, The Seventh People's Hospital of Chengdu, Chengdu, Sichuan, 640021, People's Republic of China
| | - Jianwu Zhang
- School of Pharmacy, North Sichuan Medical College, Nanchong, Sichuan, 637100, People's Republic of China
| | - Wei Luo
- Department of Respiratory Medicine, The People's Hospital of Leshan, Leshan, Sichuan, 640000, People's Republic of China
| | - Zhuang Luo
- Department of Pumnary and Critical Care Medicine, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, 650032, People's Republic of China.
| | - Shaoqing Shi
- Department of Pumnary and Critical Care Medicine, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, 650032, People's Republic of China.
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22
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Chen D, Gehringer M, Lorenz S. Developing Small-Molecule Inhibitors of HECT-Type Ubiquitin Ligases for Therapeutic Applications: Challenges and Opportunities. Chembiochem 2018; 19:2123-2135. [PMID: 30088849 PMCID: PMC6471174 DOI: 10.1002/cbic.201800321] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Indexed: 12/11/2022]
Abstract
The ubiquitin system regulates countless physiological and disease-associated processes and has emerged as an attractive entryway for therapeutic efforts. With over 600 members in the human proteome, ubiquitin ligases are the most diverse class of ubiquitylation enzymes and pivotal in encoding specificity in ubiquitin signaling. Although considerable progress has been made in the identification of small molecules targeting RING ligases, relatively little is known about the "druggability" of HECT (homologous to E6AP C terminus) ligases, many of which are critically implicated in human pathologies. A major obstacle to optimizing the few available ligands is our incomplete understanding of their inhibitory mechanisms and the structural basis of catalysis in HECT ligases. Here, we survey recent approaches to manipulate the activities of HECT ligases with small molecules to showcase the particular challenges and opportunities these enzymes hold as therapeutic targets.
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Affiliation(s)
- Dan Chen
- Rudolf Virchow Center for Experimental BiomedicineUniversity of WürzburgJosef-Schneider-Strasse 2, Haus D1597080WürzburgGermany
| | - Matthias Gehringer
- Institute of Pharmaceutical SciencesDepartment of Pharmaceutical/Medicinal ChemistryUniversity of TübingenAuf der Morgenstelle 872076TübingenGermany
| | - Sonja Lorenz
- Rudolf Virchow Center for Experimental BiomedicineUniversity of WürzburgJosef-Schneider-Strasse 2, Haus D1597080WürzburgGermany
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23
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Baron M. Combining genetic and biophysical approaches to probe the structure and function relationships of the notch receptor. Mol Membr Biol 2018; 34:33-49. [PMID: 30246579 DOI: 10.1080/09687688.2018.1503742] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Notch is a conserved cell signalling receptor regulating many aspects of development and tissue homeostasis. Notch is activated by ligand-induced proteolytic cleavages that release the Notch intracellular domain, which relocates to the nucleus to regulate gene transcription. Proteolytic activation first requires mechanical force to be applied to the Notch extracellular domain through an endocytic pulling mechanism transmitted through the ligand/receptor interface. This exposes the proteolytic cleavage site allowing the signal to be initiated following removal of the Notch extracellular domain. Ligands can also act, when expressed in the same cell, through non-productive cis-interactions to inhibit Notch activity. Furthermore, ligand selectivity and Notch activation are regulated by numerous post-translational modifications of the extracellular domain. Additional non-canonical trans and cis interactions with other regulatory proteins may modulate alternative mechanisms of Notch activation that depend on endocytic trafficking of the full-length receptor and proteolytic release of the intracellular domain from endo-lysosomal surface. Mutations of Notch, located in different regions of the protein, are associated with a spectrum of different loss and gain of function phenotypes and offer the possibility to dissect distinct regulatory interactions and mechanisms, particularly when combined with detailed structural analysis of Notch in complex with various regulatory partners.
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Affiliation(s)
- Martin Baron
- a School of Biological Sciences , University of Manchester , Manchester , UK
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24
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Yao W, Shan Z, Gu A, Fu M, Shi Z, Wen W. WW domain-mediated regulation and activation of E3 ubiquitin ligase Suppressor of Deltex. J Biol Chem 2018; 293:16697-16708. [PMID: 30213861 DOI: 10.1074/jbc.ra118.003781] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 08/27/2018] [Indexed: 12/22/2022] Open
Abstract
The Nedd4 family E3 ligases Itch and WWP1/2 play crucial roles in the regulation of cell cycle progression and apoptosis and are closely correlated with cancer development and metastasis. It has been recently shown that the ligase activities of Itch and WWP1/2 are tightly regulated, with the HECT domain sequestered intramolecularly by a linker region connecting WW2 and WW3. Here, we show that a similar autoinhibitory mechanism is utilized by the Drosophila ortholog of Itch and WWP1/2, Suppressor of Deltex (Su(dx)). We show that Su(dx) adopts an inactive steady state with the WW domain region interacting with the HECT domain. We demonstrate that both the linker and preceding WW2 are required for the efficient binding and regulation of Su(dx) HECT. Recruiting the multiple-PY motif-containing adaptor dNdfip via WW domains relieves the inhibitory state of Su(dx) and leads to substrate (e.g. Notch) ubiquitination. Our study demonstrates an evolutionarily conservative mechanism governing the regulation and activation of some Nedd4 family E3 ligases. Our results also suggest a dual regulatory mechanism for specific Notch down-regulation via dNdfip-Su(dx)-mediated Notch ubiquitination.
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Affiliation(s)
- Weiyi Yao
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and
| | - Zelin Shan
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and
| | - Aihong Gu
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and
| | - Minjie Fu
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and
| | - Zhifeng Shi
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and
| | - Wenyu Wen
- From the Department of Neurosurgery, Huashan Hospital, Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200040, China and .,the Department of Systems Biology for Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
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25
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Mund T, Masuda-Suzukake M, Goedert M, Pelham HR. Ubiquitination of alpha-synuclein filaments by Nedd4 ligases. PLoS One 2018; 13:e0200763. [PMID: 30021006 PMCID: PMC6051637 DOI: 10.1371/journal.pone.0200763] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 07/02/2018] [Indexed: 11/19/2022] Open
Abstract
Alpha-synuclein can form beta-sheet filaments, the accumulation of which plays a key role in the development of Parkinson’s disease, dementia with Lewy bodies and multiple system atrophy. It has previously been shown that alpha-synuclein is a substrate for the HECT domain-containing ubiquitin ligase Nedd4, and is subject to ubiquitin-mediated endosomal degradation. We show here that alpha-synuclein filaments are much better substrates for ubiquitination in vitro than monomeric alpha-synuclein, and that this increased susceptibility cannot be mimicked by the mere clustering of monomers. Recognition by Nedd4 family enzymes is not through the conventional binding of PPxY-containing sequences to WW domains of the ligase, but it also involves C2 and HECT domains. The disease-causing alpha-synuclein mutant A53T is a much less efficient substrate for Nedd4 ligases than the wild-type protein. We suggest that preferential recognition, ubiquitination and degradation of beta-sheet-containing filaments may help to limit toxicity, and that A53T alpha-synuclein may be more toxic, at least in part because it avoids this fate.
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Affiliation(s)
- Thomas Mund
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | | | - Michel Goedert
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | - Hugh R. Pelham
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
- * E-mail:
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26
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Nguyen TH, Kugler JM. Ubiquitin-Dependent Regulation of the Mammalian Hippo Pathway: Therapeutic Implications for Cancer. Cancers (Basel) 2018; 10:cancers10040121. [PMID: 29673168 PMCID: PMC5923376 DOI: 10.3390/cancers10040121] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/08/2018] [Accepted: 04/13/2018] [Indexed: 12/12/2022] Open
Abstract
The Hippo pathway serves as a key barrier for oncogenic transformation. It acts by limiting the activity of the proto-oncogenes YAP and TAZ. Reduced Hippo signaling and elevated YAP/TAZ activities are frequently observed in various types of tumors. Emerging evidence suggests that the ubiquitin system plays an important role in regulating Hippo pathway activity. Deregulation of ubiquitin ligases and of deubiquitinating enzymes has been implicated in increased YAP/TAZ activity in cancer. In this article, we review recent insights into the ubiquitin-mediated regulation of the mammalian Hippo pathway, its deregulation in cancer, and possibilities for targeting the Hippo pathway through the ubiquitin system.
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Affiliation(s)
- Thanh Hung Nguyen
- Institute of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3, 2200 Copenhagen, Denmark.
| | - Jan-Michael Kugler
- Institute of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3, 2200 Copenhagen, Denmark.
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27
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Lorenz S. Structural mechanisms of HECT-type ubiquitin ligases. Biol Chem 2018; 399:127-145. [PMID: 29016349 DOI: 10.1515/hsz-2017-0184] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/25/2017] [Indexed: 12/31/2022]
Abstract
Ubiquitin ligases (E3 enzymes) transfer ubiquitin from ubiquitin-conjugating (E2) enzymes to target proteins. By determining the selection of target proteins, modification sites on those target proteins, and the types of ubiquitin modifications that are formed, E3 enzymes are key specificity factors in ubiquitin signaling. Here, I summarize our knowledge of the structural mechanisms in the HECT E3 subfamily, many members of which play important roles in human disease. I discuss interactions of the conserved HECT domain with E2 enzymes, ubiquitin and target proteins, as well as macromolecular interactions with regulatory functions. While we understand individual steps in the catalytic cycle of HECT E3 enzymes on a structural level, this review also highlights key aspects that have yet to be elucidated. For instance, it remains unclear how diverse target proteins are presented to the catalytic center and how certain HECT E3 enzymes achieve specificity in ubiquitin linkage formation. The structural and functional properties of the N-terminal regions of HECT E3 enzymes that likely act as signaling hubs are also largely unknown. Structural insights into these aspects may open up routes for a therapeutic intervention with specific HECT E3 functions in distinct pathophysiological settings.
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Affiliation(s)
- Sonja Lorenz
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Josef-Schneider-Strasse 2, D-97080 Würzburg, Germany
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28
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Mund T, Pelham HR. Substrate clustering potently regulates the activity of WW-HECT domain-containing ubiquitin ligases. J Biol Chem 2018; 293:5200-5209. [PMID: 29463679 PMCID: PMC5892558 DOI: 10.1074/jbc.ra117.000934] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 02/06/2018] [Indexed: 11/28/2022] Open
Abstract
The Nedd4 family of HECT domain–containing E3 ligases ubiquitinate many transcription factors and signaling proteins, and their activity is tightly regulated. Normally, intramolecular interactions curb the catalytic activity of the HECT domain, but these can be broken by the binding of PY motifs, found on substrate molecules and adaptors, to the WW domains characteristic of this E3 ligase family. This raises the prospect of substrates automatically activating the ligases, frustrating the purpose of ligase regulation. Here we show that soluble protein substrates and adaptors such as α arrestins, even with multiple PY elements, cannot activate ligase activity efficiently. However, we found that polymerization or membrane tethering of these substrates dramatically increases the ligase activity both in vivo and in vitro. Aggregation of luciferase-containing substrates upon heat shock had a similar effect and could also expose cryptic PY elements in the substrates. We inferred that ligase activation critically requires a substantial array of clustered PY motifs and that the formation of such arrays on membranes or in polymeric aggregates may be an essential step in this mode of ligase regulation. We conclude that recruitment of α arrestins to membrane receptors and aggregation of unstable proteins after heat shock may be physiologically relevant mechanisms for triggering ubiquitination by Nedd4 family HECT domain–containing E3 ligases.
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Affiliation(s)
- Thomas Mund
- From the Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, United Kingdom
| | - Hugh R Pelham
- From the Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, United Kingdom
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29
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Flack JE, Mieszczanek J, Novcic N, Bienz M. Wnt-Dependent Inactivation of the Groucho/TLE Co-repressor by the HECT E3 Ubiquitin Ligase Hyd/UBR5. Mol Cell 2017; 67:181-193.e5. [PMID: 28689657 PMCID: PMC5592244 DOI: 10.1016/j.molcel.2017.06.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 05/01/2017] [Accepted: 06/09/2017] [Indexed: 12/19/2022]
Abstract
Extracellular signals are transduced to the cell nucleus by effectors that bind to enhancer complexes to operate transcriptional switches. For example, the Wnt enhanceosome is a multiprotein complex associated with Wnt-responsive enhancers through T cell factors (TCF) and kept silent by Groucho/TLE co-repressors. Wnt-activated β-catenin binds to TCF to overcome this repression, but how it achieves this is unknown. Here, we discover that this process depends on the HECT E3 ubiquitin ligase Hyd/UBR5, which is required for Wnt signal responses in Drosophila and human cell lines downstream of activated Armadillo/β-catenin. We identify Groucho/TLE as a functionally relevant substrate, whose ubiquitylation by UBR5 is induced by Wnt signaling and conferred by β-catenin. Inactivation of TLE by UBR5-dependent ubiquitylation also involves VCP/p97, an AAA ATPase regulating the folding of various cellular substrates including ubiquitylated chromatin proteins. Thus, Groucho/TLE ubiquitylation by Hyd/UBR5 is a key prerequisite that enables Armadillo/β-catenin to activate transcription.
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Affiliation(s)
- Joshua E Flack
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Juliusz Mieszczanek
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Nikola Novcic
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Mariann Bienz
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge, CB2 0QH, UK.
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30
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Byrne R, Mund T, Licchesi JDF. Activity-Based Probes for HECT E3 Ubiquitin Ligases. Chembiochem 2017; 18:1415-1427. [PMID: 28425671 PMCID: PMC5575557 DOI: 10.1002/cbic.201700006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Indexed: 01/02/2023]
Abstract
Activity‐based probes (ABPs) have been used to dissect the biochemical/structural properties and cellular functions of deubiquitinases. However, their utility in studying cysteine‐based E3 ubiquitin ligases has been limited. In this study, we evaluate the use of ubiquitin‐ABPs (Ub‐VME and Ub‐PA) and a novel set of E2–Ub‐ABPs on a panel of HECT E3 ubiquitin ligases. Our in vitro data show that ubiquitin‐ABPs can label HECT domains. We also provide the first evidence that, in addition to the RBR E3 ubiquitin ligase Parkin, E2–Ub‐ABPs can also label the catalytic HECT domains of NEDD4, UBE3C, and HECTD1. Importantly, the endogenous proteasomal E3 ligase UBE3C was also successfully labelled by Ub‐PA and His‐UBE2D2–Ub‐ABP in lysate of cells grown under basal conditions. Our findings provide novel insights into the use of ABPs for the study of HECT E3 ubiquitin ligases.
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Affiliation(s)
- Robert Byrne
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Thomas Mund
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, CB2 0QH, UK
| | - Julien D F Licchesi
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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31
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Gorelik M, Sidhu SS. Specific targeting of the deubiquitinase and E3 ligase families with engineered ubiquitin variants. Bioeng Transl Med 2016; 2:31-42. [PMID: 28580429 PMCID: PMC5434665 DOI: 10.1002/btm2.10044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/24/2016] [Indexed: 12/11/2022] Open
Abstract
The ubiquitin proteasome system (UPS) has garnered much attention due to its potential for the development of therapeutics. Following a successful clinical application of general proteasome inhibitors much effort has been devoted to targeting individual UPS components including E3 enzymes and deubiquitinases that control specificity of ubiquitination. Our group has developed a novel approach for targeting the UPS proteins using engineered ubiquitin variants (Ubvs). These drug‐like proteins can serve as valuable tools to study biological function of UPS components and assist in the development of small molecules for clinical use. In this review, we summarize studies of Ubvs targeting members of three major families, including deubiquitinases, HECT E3 ligases, and CRL E3 ligases. In particular, we focus on Ubv binding mechanisms, structural studies, and effects on enzyme function. Furthermore, new insights gained from the Ubvs are discussed in the context of small molecule studies.
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Affiliation(s)
- Maryna Gorelik
- Banting and Best Dept. of Medical Research and the Dept. of Molecular Genetics Terrence Donnelly Center for Cellular and Biomolecular Research, University of Toronto 160 College Street Toronto ON Canada M5S 3E1
| | - Sachdev S Sidhu
- Banting and Best Dept. of Medical Research and the Dept. of Molecular Genetics Terrence Donnelly Center for Cellular and Biomolecular Research, University of Toronto 160 College Street Toronto ON Canada M5S 3E1
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32
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Gammons MV, Rutherford TJ, Steinhart Z, Angers S, Bienz M. Essential role of the Dishevelled DEP domain in a Wnt-dependent human-cell-based complementation assay. J Cell Sci 2016; 129:3892-3902. [PMID: 27744318 PMCID: PMC5087658 DOI: 10.1242/jcs.195685] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 08/30/2016] [Indexed: 01/15/2023] Open
Abstract
Dishevelled (DVL) assembles Wnt signalosomes through dynamic head-to-tail polymerisation by means of its DIX domain. It thus transduces Wnt signals to cytoplasmic effectors including β-catenin, to control cell fates during normal development, tissue homeostasis and also in cancer. To date, most functional studies of Dishevelled relied on its Wnt-independent signalling activity resulting from overexpression, which is sufficient to trigger polymerisation, bypassing the requirement for Wnt signals. Here, we generate a human cell line devoid of endogenous Dishevelled (DVL1- DVL3), which lacks Wnt signal transduction to β-catenin. However, Wnt responses can be restored by DVL2 stably re-expressed at near-endogenous levels. Using this assay to test mutant DVL2, we show that its DEP domain is essential, whereas its PDZ domain is dispensable, for signalling to β-catenin. Our results imply two mutually exclusive functions of the DEP domain in Wnt signal transduction - binding to Frizzled to recruit Dishevelled to the receptor complex, and dimerising to cross-link DIX domain polymers for signalosome assembly. Our assay avoids the caveats associated with overexpressing Dishevelled, and provides a powerful tool for rigorous functional tests of this pivotal human signalling protein.
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Affiliation(s)
- Melissa V Gammons
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Trevor J Rutherford
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Zachary Steinhart
- Leslie Dan Faculty of Pharmacy, Room 901, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
| | - Stephane Angers
- Leslie Dan Faculty of Pharmacy, Room 901, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
| | - Mariann Bienz
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
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33
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Gammons MV, Renko M, Johnson CM, Rutherford TJ, Bienz M. Wnt Signalosome Assembly by DEP Domain Swapping of Dishevelled. Mol Cell 2016; 64:92-104. [PMID: 27692984 PMCID: PMC5065529 DOI: 10.1016/j.molcel.2016.08.026] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/15/2016] [Accepted: 08/23/2016] [Indexed: 01/17/2023]
Abstract
Extracellular signals are often transduced by dynamic signaling complexes ("signalosomes") assembled by oligomerizing hub proteins following their recruitment to signal-activated transmembrane receptors. A paradigm is the Wnt signalosome, which is assembled by Dishevelled via reversible head-to-tail polymerization by its DIX domain. Its activity causes stabilization of β-catenin, a Wnt effector with pivotal roles in animal development and cancer. How Wnt triggers signalosome assembly is unknown. Here, we use structural analysis, as well as biophysical and cell-based assays, to show that the DEP domain of Dishevelled undergoes a conformational switch, from monomeric to swapped dimer, to trigger DIX-dependent polymerization and signaling to β-catenin. This occurs in two steps: binding of monomeric DEP to Frizzled followed by DEP domain swapping triggered by its high local concentration upon Wnt-induced recruitment into clathrin-coated pits. DEP domain swapping confers directional bias on signaling, and the dimerization provides cross-linking between Dishevelled polymers, illustrating a key principle underlying signalosome formation.
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Affiliation(s)
- Melissa V Gammons
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK.
| | - Miha Renko
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Christopher M Johnson
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Trevor J Rutherford
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Mariann Bienz
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH, UK.
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34
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Abstract
The highly conserved Notch signalling pathway functions in many different developmental and homeostatic processes, which raises the question of how this pathway can achieve such diverse outcomes. With a direct route from the membrane to the nucleus, the Notch pathway has fewer opportunities for regulation than do many other signalling pathways, yet it generates exquisitely patterned structures, including sensory hair cells and branched arterial networks. More confusingly, its activity promotes tissue growth and cancers in some circumstances but cell death and tumour suppression in others. Many different regulatory mechanisms help to shape the activity of the Notch pathway, generating functional outputs that are appropriate for each context. These mechanisms include the receptor-ligand landscape, the tissue topology, the nuclear environment and the connectivity of the regulatory networks.
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Affiliation(s)
- Sarah J Bray
- Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK
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