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Wang Y, Hu H, Yuan S, LI Y, Cao K, Sun H, Liu Y. Cuprous Ions can Disrupt Structure and Functions of the RING Finger Domain of RNF11. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00631f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper is an essential element that plays crucial roles in a variety of biological processes, while excessive copper is harmful to cells. RNF11 is a RING finger protein associated with...
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RNF11 at the Crossroads of Protein Ubiquitination. Biomolecules 2020; 10:biom10111538. [PMID: 33187263 PMCID: PMC7697665 DOI: 10.3390/biom10111538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 12/18/2022] Open
Abstract
RNF11 (Ring Finger Protein 11) is a 154 amino-acid long protein that contains a RING-H2 domain, whose sequence has remained substantially unchanged throughout vertebrate evolution. RNF11 has drawn attention as a modulator of protein degradation by HECT E3 ligases. Indeed, the large number of substrates that are regulated by HECT ligases, such as ITCH, SMURF1/2, WWP1/2, and NEDD4, and their role in turning off the signaling by ubiquitin-mediated degradation, candidates RNF11 as the master regulator of a plethora of signaling pathways. Starting from the analysis of the primary sequence motifs and from the list of RNF11 protein partners, we summarize the evidence implicating RNF11 as an important player in modulating ubiquitin-regulated processes that are involved in transforming growth factor beta (TGF-β), nuclear factor-κB (NF-κB), and Epidermal Growth Factor (EGF) signaling pathways. This connection appears to be particularly significant, since RNF11 is overexpressed in several tumors, even though its role as tumor growth inhibitor or promoter is still controversial. The review highlights the different facets and peculiarities of this unconventional small RING-E3 ligase and its implication in tumorigenesis, invasion, neuroinflammation, and cancer metastasis.
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Rozés-Salvador V, Wilson C, Olmos C, Gonzalez-Billault C, Conde C. Fine-Tuning the TGFβ Signaling Pathway by SARA During Neuronal Development. Front Cell Dev Biol 2020; 8:550267. [PMID: 33015054 PMCID: PMC7494740 DOI: 10.3389/fcell.2020.550267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 08/14/2020] [Indexed: 12/12/2022] Open
Abstract
Neural development is a complex process that involves critical events, including cytoskeleton dynamics and selective trafficking of proteins to defined cellular destinations. In this regard, Smad Anchor for Receptor Activation (SARA) is an early endosome resident protein, where perform trafficking- associated functions. In addition, SARA is also involved in cell signaling, including the TGFβ-dependent pathway. Accordingly, SARA, and TGFβ signaling are required for proper axonal specification and migration of cortical neurons, unveiling a critical role for neuronal development. However, the cooperative action between the TGFβ pathway and SARA to this process has remained understudied. In this work, we show novel evidence suggesting a cross-talk between SARA and TGFβ pathway needed for proper polarization, axonal specification, growth and cortical migration of central neurons both in vitro and in vivo. Using microscopy tools and cultured hippocampal neurons, we show a local interaction between SARA and TβRI (TGFβ I receptor) at endosomes. In addition, SARA loss of function, induced by the expression of the dominant-negative SARA-F728A, over-activates the TGFβ pathway, most likely by preserving phosphorylated TβRI. Consequently, SARA-mediated activation of TGFβ pathway impacts on neuronal development, promoting axonal growth and cortical migration of neurons during brain development. Moreover, our data suggests that SARA basally prevents the activation of TβRI through the recruitment of the inhibitory complex PP1c/GADD34 in polarizing neurons. Together, these results propose that SARA is a negative regulator of the TGFβ pathway, being critical for a proper orchestration for neuronal development.
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Affiliation(s)
- Victoria Rozés-Salvador
- Instituto de Investigación Médica Mercedes y Martín Ferreyra INIMEC-CONICET-UNC, Córdoba, Argentina.,Instituto de Ciencias Básicas, Universidad Nacional de Villa María (UNVM), Córdoba, Argentina
| | - Carlos Wilson
- Instituto de Investigación Médica Mercedes y Martín Ferreyra INIMEC-CONICET-UNC, Córdoba, Argentina.,Instituto Universitario de Ciencias Biomédicas de Córdoba (IUCBC), Córdoba, Argentina
| | - Cristina Olmos
- Department of Biology, Faculty of Sciences and Department of Neurosciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Christian Gonzalez-Billault
- Department of Biology, Faculty of Sciences and Department of Neurosciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,The Buck Institute for Research on Aging, Novato, CA, United States
| | - Cecilia Conde
- Instituto de Investigación Médica Mercedes y Martín Ferreyra INIMEC-CONICET-UNC, Córdoba, Argentina
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Mattioni A, Boldt K, Auciello G, Komada M, Rappoport JZ, Ueffing M, Castagnoli L, Cesareni G, Santonico E. Ring Finger Protein 11 acts on ligand-activated EGFR via the direct interaction with the UIM region of ANKRD13 protein family. FEBS J 2020; 287:3526-3550. [PMID: 31985874 DOI: 10.1111/febs.15226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 11/13/2019] [Accepted: 01/22/2020] [Indexed: 01/07/2023]
Abstract
RING finger protein 11 (RNF11) is an evolutionary conserved Really Interesting New Gene E3 ligase that is overexpressed in several human tumours. Although several reports have highlighted its involvement in crucial cellular processes, the mechanistic details underlying its function are still poorly understood. Utilizing stable isotope labelling by amino acids in culture (SILAC)-based proteomics analysis, we identified 51 proteins that co-immunoprecipitate with wild-type RNF11 and/or with its catalytically inactive mutant. We focused our attention on the interaction of RNF11 with Ankyrin repeat domain-containing protein 13 (ANKRD13)s family. Members of the ANKRD13 family contain ubiquitin-interacting motifs (UIM) that recognize the Lys-63-linked ubiquitin (Ub) chains appended to Epidermal growth factor receptor (EGFR) soon after ligand binding. We show that ANKRD13A, ANKRD13B and ANKRD13D form a complex with RNF11 in vivo and that the UIMs are required for complex formation. However, at odds with the conventional UIM binding mode, Ub modification of RNF11 is not required for the interaction with ANKRD13 proteins. We also show that the interaction between ANKRD13A and RNF11 is modulated by the EGF stimulus and that a complex formed by ANKRD13A, RNF11 and activated EGFR is transiently assembled in the early phases of receptor endocytosis. Moreover, loss of function of the E3 ligases Itchy E3 ubiquitin-protein ligase (ITCH) or RNF11, respectively, abrogates or increases the ubiquitination of endogenous ANKRD13A, affecting its ability to bind activated EGFR. We propose a model whereby the ANKRD13 proteins act as molecular scaffolds that promote the transient formation of a complex between the activated EGFR and the E3 ligases ITCH and RNF11. By regulating the ubiquitination status of ANKRD13A and consequently its endocytic adaptor function, RNF11 promotes sorting of the activated EGFR for lysosomal degradation.
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Affiliation(s)
- Anna Mattioni
- Department of Biology, University of Rome Tor Vergata, Italy
| | - Karsten Boldt
- Center for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Germany
| | - Giulio Auciello
- Istituto di Ricerche di Biologia Molecolare (IRBM), Pomezia, Italy
| | - Masayuki Komada
- Department of Biological Sciences, Tokyo Institute of Technology, Yokohama, Japan
| | | | - Marius Ueffing
- Center for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Germany
| | | | - Gianni Cesareni
- Department of Biology, University of Rome Tor Vergata, Italy
- Fondazione Santa Lucia Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Elena Santonico
- Department of Biology, University of Rome Tor Vergata, Italy
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Wojtowicz S, Lee S, Chan E, Ng E, Campbell CI, Di Guglielmo GM. SMURF2 and SMAD7 induce SARA degradation via the proteasome. Cell Signal 2020; 72:109627. [DOI: 10.1016/j.cellsig.2020.109627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 03/11/2020] [Accepted: 03/31/2020] [Indexed: 10/24/2022]
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Altered Expression of Three EGFR Posttranslational Regulators MDGI, MIG6, and EIG121 in Invasive Breast Carcinomas. Anal Cell Pathol (Amst) 2020; 2020:9268236. [PMID: 32377505 PMCID: PMC7189325 DOI: 10.1155/2020/9268236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 11/11/2019] [Accepted: 03/06/2020] [Indexed: 12/21/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) signalling is a highly regulated process with a tight balance between receptor activation and inactivation in invasive breast carcinomas (IBCs) particularly in triple-negative carcinomas (TNC). Clinical trials using anti-EGFR therapies are actually performed although no activating alterations (mutations, amplifications, or rearrangements) of EGFR have been clearly recognized in order to identify new targeted modalities for IBCs. We explored mammary-derived growth inhibitor (MDGI), estrogen-induced gene-121 (EIG121), and mitogen-induced gene-6 (MIG6), three posttranslational EGFR trafficking molecules implicated in EGFR spatiotemporal regulatory pathway. We quantified MDGI, EIG121, and MIG6 at mRNA levels by using real-time quantitative RT-PCR in a series of 440 IBCs and at protein levels by using immunohistochemistry in a series of 88 IBCs. Results obtained by RT-PCR showed that in IBCs, MDGI, MIG6, and EIG121 mRNA were mainly underexpressed (25.7%, 45.0%, and 16.1%, respectively) particularly in the TNC subtype for EIG121 (60.3%). We also observed mRNA overexpression of MDGI and EIG121, respectively, in 12.7% and 22.3% of IBCs. These altered mRNA expressions were confirmed at the protein level. Some links were found between expression patterns of these three genes and several classical pathological and clinical parameters. Only EIG121 was found to have a prognostic significance (p = 0.0038). Altered expression of these three major EGFR posttranslational negative regulators could create an aberrant EGFR-mediated oncogenic signalling pathway in IBCs. MDGI, MIG6, and EIG121 expression status also may be potential useful biomarkers (sensitivity or resistance) in targeted EGFR therapy.
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Sa JK, Hong JY, Lee IK, Kim JS, Sim MH, Kim HJ, An JY, Sohn TS, Lee JH, Bae JM, Kim S, Kim KM, Kim ST, Park SH, Park JO, Lim HY, Kang WK, Her NG, Lee Y, Cho HJ, Shin YJ, Kim M, Koo H, Kim M, Seo YJ, Kim JY, Choi MG, Nam DH, Lee J. Comprehensive pharmacogenomic characterization of gastric cancer. Genome Med 2020; 12:17. [PMID: 32070411 PMCID: PMC7029441 DOI: 10.1186/s13073-020-0717-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 01/31/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Gastric cancer is among the most lethal human malignancies. Previous studies have identified molecular aberrations that constitute dynamic biological networks and genomic complexities of gastric tumors. However, the clinical translation of molecular-guided targeted therapy is hampered by challenges. Notably, solid tumors often harbor multiple genetic alterations, complicating the development of effective treatments. METHODS To address such challenges, we established a comprehensive dataset of molecularly annotated patient derivatives coupled with pharmacological profiles for 60 targeted agents to explore dynamic pharmacogenomic interactions in gastric cancers. RESULTS We identified lineage-specific drug sensitivities based on histopathological and molecular subclassification, including substantial sensitivities toward VEGFR and EGFR inhibition therapies in diffuse- and signet ring-type gastric tumors, respectively. We identified potential therapeutic opportunities for WNT pathway inhibitors in ALK-mutant tumors, a significant association between PIK3CA-E542K mutation and AZD5363 response, and transcriptome expression of RNF11 as a potential predictor of response to gefitinib. CONCLUSIONS Collectively, our results demonstrate the feasibility of drug screening combined with tumor molecular characterization to facilitate personalized therapeutic regimens for gastric tumors.
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Affiliation(s)
- Jason K Sa
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Jung Yong Hong
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - In-Kyoung Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ju-Sun Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Moon-Hee Sim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ha Jung Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ji Yeong An
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Tae Sung Sohn
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Joon Ho Lee
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jae Moon Bae
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sung Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyoung-Mee Kim
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Seung Tae Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Se Hoon Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Joon Oh Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ho Yeong Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Won Ki Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Nam-Gu Her
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Yeri Lee
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Hee Jin Cho
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Yong Jae Shin
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Misuk Kim
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Harim Koo
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Science and Technology, Sungkyunkwan University, Seoul, Republic of Korea
| | - Mirinae Kim
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Yun Jee Seo
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Ja Yeon Kim
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea
| | - Min-Gew Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - Do-Hyun Nam
- Institute for Refractory Cancer Research, Samsung Medical Center, Seoul, Republic of Korea.
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Science and Technology, Sungkyunkwan University, Seoul, Republic of Korea.
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - Jeeyun Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Zenko D, Thompson D, Hislop JN. Endocytic sorting and downregulation of the M2 acetylcholine receptor is regulated by ubiquitin and the ESCRT complex. Neuropharmacology 2020; 162:107828. [PMID: 31654703 DOI: 10.1016/j.neuropharm.2019.107828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 10/16/2019] [Accepted: 10/21/2019] [Indexed: 01/14/2023]
Abstract
Cholinergic dysfunction plays a critical role in a number of disease states, and the loss of functional muscarinic acetylcholine receptors plays a key role in disease pathogenesis. Therefore, preventing receptor downregulation would maintain functional receptor number, and be predicted to alleviate symptoms. However, the molecular mechanism(s) underlying muscarinic receptor downregulation are currently unknown. Here we demonstrate that the M2 muscarinic receptor undergoes rapid lysosomal proteolysis, and this lysosomal trafficking is facilitated by ubiquitination of the receptor. Importantly, we show that this trafficking is driven specifically by ESCRT mediated involution. Critically, we provide evidence that disruption of this process leads to a re-routing of the trafficking of the M2 receptor away from the lysosome and into recycling pathway, and eventually back to the plasma membrane. This study is the first to identify the process by which the M2 muscarinic acetylcholine receptor undergoes endocytic sorting, and critically reveals a regulatory checkpoint that represents a target to pharmacologically increase the number of functional muscarinic receptors within the central nervous system.
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Affiliation(s)
- Dmitry Zenko
- Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, AB25 2ZD, UK
| | - Dawn Thompson
- Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, AB25 2ZD, UK
| | - James N Hislop
- Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, AB25 2ZD, UK.
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9
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Sharma S, Carmona A, Skowronek A, Yu F, Collins MO, Naik S, Murzeau CM, Tseng PL, Erdmann KS. Apoptotic signalling targets the post-endocytic sorting machinery of the death receptor Fas/CD95. Nat Commun 2019; 10:3105. [PMID: 31308371 PMCID: PMC6629679 DOI: 10.1038/s41467-019-11025-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 06/12/2019] [Indexed: 02/07/2023] Open
Abstract
Fas plays a major role in regulating ligand-induced apoptosis in many cell types. It is well known that several cancers demonstrate reduced cell surface levels of Fas and thus escape a potential control system via ligand-induced apoptosis, although underlying mechanisms are unclear. Here we report that the endosome associated trafficking regulator 1 (ENTR1), controls cell surface levels of Fas and Fas-mediated apoptotic signalling. ENTR1 regulates, via binding to the coiled coil domain protein Dysbindin, the delivery of Fas from endosomes to lysosomes thereby controlling termination of Fas signal transduction. We demonstrate that ENTR1 is cleaved during Fas-induced apoptosis in a caspase-dependent manner revealing an unexpected interplay of apoptotic signalling and regulation of endolysosomal trafficking resulting in a positive feedback signalling-loop. Our data provide insights into the molecular mechanism of Fas post-endocytic trafficking and signalling, opening possible explanations on how cancer cells regulate cell surface levels of death receptors. Fas is a death receptor that regulates apoptosis in many cell types and is downregulated on the cell surface in many cancers. Here, Sharma et al. show that endosome associated trafficking regulator ENTR1 regulates delivery of Fas to lysosomes, thereby controlling its degradation and signalling.
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Affiliation(s)
- Shruti Sharma
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Antonio Carmona
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Agnieszka Skowronek
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Fangyan Yu
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK.,Department of Radiation Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Mark O Collins
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Sindhu Naik
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Claire M Murzeau
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Pei-Li Tseng
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK
| | - Kai S Erdmann
- Department of Biomedical Science & Centre of Membrane Interactions and Dynamics, University of Sheffield, Sheffield, S10 2TN, UK.
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New Player in Endosomal Trafficking: Differential Roles of Smad Anchor for Receptor Activation (SARA) Protein. Mol Cell Biol 2018; 38:MCB.00446-18. [PMID: 30275343 DOI: 10.1128/mcb.00446-18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The development and maintenance of multicellular organisms require specialized coordination between external cellular signals and the proteins receiving stimuli and regulating responses. A critical role in the proper functioning of these processes is played by endosomal trafficking, which enables the transport of proteins to targeted sites as well as their return to the plasma membrane through its essential components, the endosomes. During this trafficking, signaling pathways controlling functions related to the endosomal system are activated both directly and indirectly. Although there are a considerable number of molecules participating in these processes, some are more known than others for their specific functions. Toward the end of the 1990s, Smad anchor for receptor activation (SARA) protein was described to be controlling and to facilitate the localization of Smads to transforming growth factor β (TGF-β) receptors during TGF-β signaling activation, and, strikingly, SARA was also identified to be one of the proteins that bind to early endosomes (EEs) participating in membrane trafficking in several cell models. The purpose of this review is to analyze the state of the art of the contribution of SARA in different cell types and cellular contexts, focusing on the biological role of SARA in two main processes, trafficking and cellular signaling, both of which are necessary for intercellular coordination, communication, and development.
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Spatio-temporal regulation of EGFR signaling by the Eps15 homology domain-containing protein 3 (EHD3). Oncotarget 2018; 7:79203-79216. [PMID: 27811356 PMCID: PMC5346708 DOI: 10.18632/oncotarget.13008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 08/21/2016] [Indexed: 11/25/2022] Open
Abstract
The epidermal growth factor (EGF) receptor EGFR is a major receptor tyrosine kinase whose role in gliomagenesis is well established. We have recently identified EHD3 [Eps15 homology (EH) domain-containing protein 3], an endocytic trafficking regulatory protein, as a putative brain tumor suppressor. Here, we investigate the underlying mechanisms, by establishing a novel mechanistic and functional connection between EHD3 and the EGFR signaling pathway. We show that, in response to stimulation with the EGF ligand, EHD3 accelerates the rate of EGFR degradation by dramatically increasing its ubiquitination. As part of this process, EHD3 also regulates EGFR endosomal trafficking by diverting it away from the recycling route into the degradative pathway. Moreover, we found that upon EGF activation, rather than affecting the total MAPK and AKT downstream signaling, EHD3 decreases endosome-based signaling of these two pathways, thus suggesting the contribution of EHD3 in the spatial regulation of EGFR signaling. This function explains the higher sensitivity of EHD3-expressing cells to the growth-inhibitory effects of EGF. In summary, this is the first report supporting a mechanism of EHD3-mediated tumor suppression that involves the attenuation of endosomal signaling of the EGFR oncogene.
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12
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Szymanska E, Budick-Harmelin N, Miaczynska M. Endosomal "sort" of signaling control: The role of ESCRT machinery in regulation of receptor-mediated signaling pathways. Semin Cell Dev Biol 2017; 74:11-20. [PMID: 28797837 DOI: 10.1016/j.semcdb.2017.08.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 07/24/2017] [Accepted: 08/04/2017] [Indexed: 12/31/2022]
Abstract
The endosomal sorting complexes required for transport (ESCRTs) machinery consists of four protein assemblies (ESCRT-0 to -III subcomplexes) which mediate various processes of membrane remodeling in the cell. In the endocytic pathway, ESCRTs sort cargo destined for degradation into intraluminal vesicles (ILVs) of endosomes. Cargos targeted by ESCRTs include various signaling molecules, mainly internalized cell-surface receptors but also some cytosolic proteins. It is therefore expected that aberrant trafficking caused by ESCRT dysfunction affects different signaling pathways. Here we review how perturbation of ESCRT activity alters intracellular transport of membrane receptors, causing their accumulation on endocytic compartments, decreased degradation and/or altered recycling to the plasma membrane. We further describe how perturbed trafficking of receptors impacts the activity of their downstream signaling pathways, with or without changes in transcriptional responses. Finally, we present evidence that ESCRT components can also control activity and intracellular distribution of cytosolic signaling proteins (kinases, other effectors and soluble receptors). The underlying mechanisms involve sequestration of such proteins in ILVs, their sorting for degradation or towards non-lysosomal destinations, and regulating their availability in various cellular compartments. All these ESCRT-mediated processes can modulate final outputs of multiple signaling pathways.
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Affiliation(s)
- Ewelina Szymanska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Noga Budick-Harmelin
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland; Cell Research and Immunology Department, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
| | - Marta Miaczynska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland.
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13
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Malonis RJ, Fu W, Jelcic MJ, Thompson M, Canter BS, Tsikitis M, Esteva FJ, Sánchez I. RNF11 sequestration of the E3 ligase SMURF2 on membranes antagonizes SMAD7 down-regulation of transforming growth factor β signaling. J Biol Chem 2017; 292:7435-7451. [PMID: 28292929 DOI: 10.1074/jbc.m117.783662] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Indexed: 01/17/2023] Open
Abstract
The activity of the E3 ligase, SMURF2, is antagonized by an intramolecular, autoinhibitory interaction between its C2 and Hect domains. Relief of SMURF2 autoinhibition is induced by TGFβ and is mediated by the inhibitory SMAD, SMAD7. In a proteomic screen for endomembrane interactants of the RING-domain E3 ligase, RNF11, we identified SMURF2, among a cohort of Hect E3 ligases previously implicated in TGFβ signaling. Reconstitution of the SMURF2·RNF11 complex in vitro unexpectedly revealed robust SMURF2 E3 ligase activity, with biochemical properties previously restricted to the SMURF2·SMAD7 complex. Using in vitro binding assays, we find that RNF11 can directly compete with SMAD7 for SMURF2 and that binding is mutually exclusive and dependent on a proline-rich domain. Moreover, we found that co-expression of RNF11 and SMURF2 dramatically reduced SMURF2 ubiquitylation in the cell. This effect is strictly dependent on complex formation and sorting determinants that regulate the association of RNF11 with membranes. RNF11 is overexpressed in certain tumors, and, importantly, we found that depletion of this protein down-regulated gene expression of several TGFβ-responsive genes, dampened cell proliferation, and dramatically reduced cell migration in response to TGFβ. Our data suggest for the first time that the choice of binding partners for SMURF2 can sustain or repress TGFβ signaling, and RNF11 may promote TGFβ-induced cell migration.
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Affiliation(s)
- Ryan J Malonis
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016.,the Albert Einstein School of Medicine, Bronx, New York 10461
| | - Wenxiang Fu
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016.,Biozentrum, University of Basel, 4056 Basel, Switzerland
| | - Mark J Jelcic
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016.,the Memorial Sloan Kettering Cancer Center, New York, New York 10065
| | - Marae Thompson
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016
| | - Brian S Canter
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016.,the Rutgers Biomedical and Health Sciences, Newark, New Jersey 07103, and
| | - Mary Tsikitis
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016.,the Division of Cell Biology, Academy of Athens, Athens 11527, Greece
| | - Francisco J Esteva
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016
| | - Irma Sánchez
- From the Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York, New York 10016,
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14
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Farhan H. Regulation of EGFR surface levels by COPII-dependent trafficking. J Cell Biol 2016; 215:441-443. [PMID: 27872251 PMCID: PMC5119945 DOI: 10.1083/jcb.201611014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 11/03/2016] [Indexed: 01/16/2023] Open
Abstract
Farhan discusses Scharaw et al.’s study about how the COPII machinery is used to replenish EGFR at the cell surface. Cell surface levels of epidermal growth factor receptors (EGFRs) are thought to be controlled mainly by endocytic trafficking, with biosynthetic EGFR trafficking presumed to be a constitutive and unregulated process. However, Scharaw et al. (2016. J. Cell Biol. http://dx.doi.org/10.1083/jcb.201601090) demonstrate a role for inducible COPII trafficking in controlling EGFR surface levels.
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Affiliation(s)
- Hesso Farhan
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
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15
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Scharaw S, Iskar M, Ori A, Boncompain G, Laketa V, Poser I, Lundberg E, Perez F, Beck M, Bork P, Pepperkok R. The endosomal transcriptional regulator RNF11 integrates degradation and transport of EGFR. J Cell Biol 2016; 215:543-558. [PMID: 27872256 PMCID: PMC5119934 DOI: 10.1083/jcb.201601090] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 09/07/2016] [Accepted: 10/17/2016] [Indexed: 12/24/2022] Open
Abstract
Maintenance of EGFR plasma membrane levels is critical for cell functioning. Scharaw et al. demonstrate that endosomal RNF11 is required for transcriptional up-regulation of COPII components, specifically facilitating EGFR transport in response to its lysosomal degradation after EGF stimulation. Stimulation of cells with epidermal growth factor (EGF) induces internalization and partial degradation of the EGF receptor (EGFR) by the endo-lysosomal pathway. For continuous cell functioning, EGFR plasma membrane levels are maintained by transporting newly synthesized EGFRs to the cell surface. The regulation of this process is largely unknown. In this study, we find that EGF stimulation specifically increases the transport efficiency of newly synthesized EGFRs from the endoplasmic reticulum to the plasma membrane. This coincides with an up-regulation of the inner coat protein complex II (COPII) components SEC23B, SEC24B, and SEC24D, which we show to be specifically required for EGFR transport. Up-regulation of these COPII components requires the transcriptional regulator RNF11, which localizes to early endosomes and appears additionally in the cell nucleus upon continuous EGF stimulation. Collectively, our work identifies a new regulatory mechanism that integrates the degradation and transport of EGFR in order to maintain its physiological levels at the plasma membrane.
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Affiliation(s)
- Sandra Scharaw
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Murat Iskar
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Alessandro Ori
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Gaelle Boncompain
- Institut Curie, Paris Sciences et Lettres Research University, 75248 Paris, France.,Institut Curie, Centre National de la Recherche Scientifique UMR144, 75248 Paris, France
| | - Vibor Laketa
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Ina Poser
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Emma Lundberg
- Science for Life Laboratory, KTH Royal Institute of Technology, 17121 Solna, Sweden
| | - Franck Perez
- Institut Curie, Paris Sciences et Lettres Research University, 75248 Paris, France.,Institut Curie, Centre National de la Recherche Scientifique UMR144, 75248 Paris, France
| | - Martin Beck
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Peer Bork
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany.,Max Delbrueck Center for Molecular Medicine, 13125 Berlin, Germany.,Department of Bioinformatics, Biocenter, University of Wuerzburg, 97074 Wuerzburg, Germany
| | - Rainer Pepperkok
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany
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16
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Gunaratne A, Chan E, El-Chabib TH, Carter D, Di Guglielmo GM. aPKC alters the TGFβ response in NSCLC cells through both Smad-dependent and Smad-independent pathways. J Cell Sci 2016; 128:487–98. [PMID: 25501807 DOI: 10.1242/jcs.155440] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Transforming growth factor b (TGFb) signaling controls many cellular responses including proliferation, epithelial to mesenchymal transition and apoptosis, through the activation of canonical (Smad) as well as non-canonical (e.g., Par6) pathways. Previous studies from our lab have demonstrated that aPKC inhibition regulates TGFb receptor trafficking and signaling. Here, we report that downstream TGFb-dependent transcriptional responses in aPKC-silenced NSCLC cells were reduced compared with those of control cells, despite a temporal extension of Smad2 phosphorylation. We assessed SARA–Smad2–Smad4 association and observed that knockdown of aPKC increased SARA (also known as ZFYVE9) levels and SARA–Smad2 complex formation, increased cytoplasmic retention of Smad2 and reduced Smad2–Smad4 complex formation, which correlated with reduced Smad2 nuclear translocation. Interestingly, we also detected an increase in p38 MAPK phosphorylation and apoptosis in aPKC-silenced cells, which were found to be TRAF6-dependent. Taken together, our results suggest that aPKC isoforms regulate Smad and non-Smad TGFb pathways and that aPKC inhibition sensitizes NSCLC cells to undergo TGFb dependent apoptosis.
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17
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Lee J, Oh KJ, Lee D, Kim BY, Choi JS, Ku B, Kim SJ. Structural Study of the HD-PTP Bro1 Domain in a Complex with the Core Region of STAM2, a Subunit of ESCRT-0. PLoS One 2016; 11:e0149113. [PMID: 26866605 PMCID: PMC4751086 DOI: 10.1371/journal.pone.0149113] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 01/27/2016] [Indexed: 11/18/2022] Open
Abstract
EGFR is a key player in cell proliferation and survival signaling, and its sorting into MVBs for eventual lysosomal degradation is controlled by the coordination of multiple ESCRT complexes on the endosomal membrane. HD-PTP is a cytosolic protein tyrosine phosphatase, and is associated with EGFR trafficking by interacting with the ESCRT-0 protein STAM2 and the ESCRT-III protein CHMP4B via its N-terminal Bro1 domain. Intriguingly, the homologous domain of two other human Bro1 domain-containing proteins, Alix and Brox, binds CHMP4B but not STAM2, despite their high structural similarity. To elucidate this binding specificity, we determined the complex structure of the HD-PTP Bro1 domain bound to the STAM2 core region. STAM2 binds to the hydrophobic concave pocket of the HD-PTP Bro1 domain, as CHMP4B does to the pocket of Alix, Brox, or HD-PTP but in the opposite direction. Critically, Thr145 of HD-PTP, corresponding to Lys151 of Alix and Arg145 of Brox, is revealed to be a determinant residue enabling this protein to bind STAM2, as the Alix- or Brox-mimicking mutations of this residue blocks the intermolecular interaction. This work therefore provides the structural basis for how HD-PTP recognizes the ESCRT-0 component to control EGFR sorting.
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Affiliation(s)
- Juhyeon Lee
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
- Department of Biochemistry, Chungnam National University, Daejeon, Korea
| | - Kyoung-Jin Oh
- Research Center for Metabolic Regulation, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Dasom Lee
- Research Center for Metabolic Regulation, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Bo Yeon Kim
- Incurable Diseases Therapeutics Research Center, World Class Institute, Korea Research Institute of Bioscience and Biotechnology, Ochang, Cheongwon, Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon, Korea
| | - Bonsu Ku
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
- * E-mail: (BK); (SJK)
| | - Seung Jun Kim
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
- * E-mail: (BK); (SJK)
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18
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Mamińska A, Bartosik A, Banach-Orłowska M, Pilecka I, Jastrzębski K, Zdżalik-Bielecka D, Castanon I, Poulain M, Neyen C, Wolińska-Nizioł L, Toruń A, Szymańska E, Kowalczyk A, Piwocka K, Simonsen A, Stenmark H, Fürthauer M, González-Gaitán M, Miaczynska M. ESCRT proteins restrict constitutive NF-κB signaling by trafficking cytokine receptors. Sci Signal 2016; 9:ra8. [PMID: 26787452 DOI: 10.1126/scisignal.aad0848] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Because signaling mediated by the transcription factor nuclear factor κB (NF-κB) is initiated by ligands and receptors that can undergo internalization, we investigated how endocytic trafficking regulated this key physiological pathway. We depleted all of the ESCRT (endosomal sorting complexes required for transport) subunits, which mediate receptor trafficking and degradation, and found that the components Tsg101, Vps28, UBAP1, and CHMP4B were essential to restrict constitutive NF-κB signaling in human embryonic kidney 293 cells. In the absence of exogenous cytokines, depletion of these proteins led to the activation of both canonical and noncanonical NF-κB signaling, as well as the induction of NF-κB-dependent transcriptional responses in cultured human cells, zebrafish embryos, and fat bodies in flies. These effects depended on cytokine receptors, such as the lymphotoxin β receptor (LTβR) and tumor necrosis factor receptor 1 (TNFR1). Upon depletion of ESCRT subunits, both receptors became concentrated on and signaled from endosomes. Endosomal accumulation of LTβR induced its ligand-independent oligomerization and signaling through the adaptors TNFR-associated factor 2 (TRAF2) and TRAF3. These data suggest that ESCRTs constitutively control the distribution of cytokine receptors in their ligand-free state to restrict their signaling, which may represent a general mechanism to prevent spurious activation of NF-κB.
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Affiliation(s)
- Agnieszka Mamińska
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Anna Bartosik
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | | | - Iwona Pilecka
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Kamil Jastrzębski
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | | | - Irinka Castanon
- Department of Biochemistry, University of Geneva, 1211 Geneva, Switzerland
| | - Morgane Poulain
- Institut de Biologie Valrose, CNRS UMR 7277, INSERM 1091, University of Nice Sophia Antipolis, 06108 Nice, France
| | - Claudine Neyen
- École Polytechnique Fédérale de Lausanne (EPFL), Global Health Institute, 1015 Lausanne, Switzerland
| | | | - Anna Toruń
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Ewelina Szymańska
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Agata Kowalczyk
- Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland
| | | | - Anne Simonsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0317 Oslo, Norway
| | - Harald Stenmark
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital, 0379 Oslo, Norway
| | - Maximilian Fürthauer
- Institut de Biologie Valrose, CNRS UMR 7277, INSERM 1091, University of Nice Sophia Antipolis, 06108 Nice, France
| | | | - Marta Miaczynska
- International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland.
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19
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Arias CI, Siri SO, Conde C. Involvement of SARA in Axon and Dendrite Growth. PLoS One 2015; 10:e0138792. [PMID: 26405814 PMCID: PMC4583221 DOI: 10.1371/journal.pone.0138792] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 09/03/2015] [Indexed: 11/19/2022] Open
Abstract
SARA (Smad Anchor for Receptor Activation) plays a crucial role in Rab5-mediated endocytosis in cell lines localizing to early endosomes where it regulates morphology and function. Here, we analyzed the role of SARA during neuronal development and tested whether it functions as a regulator of endocytic trafficking of selected axonal and membrane proteins. Suppression of SARA perturbs the appearance of juxtanuclear endocytic recycling compartments and the neurons show long axons with large growth cones. Furthermore, surface distribution of the cell adhesion molecule L1 in axons and the fusion of vesicles containing transferring receptor (TfR) in dendrites were increased in neurons where SARA was silenced. Conversely, SARA overexpression generated large early endosomes and reduced neurite outgrowth. Taken together, our findings suggest a significant contribution of SARA to key aspects of neuronal development, including neurite formation.
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Affiliation(s)
| | - Sebastián Omar Siri
- Laboratorio Neurobiología, INIMEC-CONICET, Córdoba, Argentina
- Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto Universitario de Ciencias Biomédicas de Córdoba, Córdoba, Argentina
| | - Cecilia Conde
- Laboratorio Neurobiología, INIMEC-CONICET, Córdoba, Argentina
- Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto Universitario de Ciencias Biomédicas de Córdoba, Córdoba, Argentina
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20
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Gomez-Lamarca MJ, Snowdon LA, Seib E, Klein T, Bray SJ. Rme-8 depletion perturbs Notch recycling and predisposes to pathogenic signaling. J Cell Biol 2015; 210:303-18. [PMID: 26169355 PMCID: PMC4508892 DOI: 10.1083/jcb.201411001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 06/11/2015] [Indexed: 02/07/2023] Open
Abstract
The retromer-associated DNAJ protein Rme-8 is necessary for normal Notch recycling, and reductions in Rme-8 sensitize cells so that additional loss-of-sorting retromer or ESCRT-0 components have catastrophic effects. Notch signaling is a major regulator of cell fate, proliferation, and differentiation. Like other signaling pathways, its activity is strongly influenced by intracellular trafficking. Besides contributing to signal activation and down-regulation, differential fluxes between trafficking routes can cause aberrant Notch pathway activation. Investigating the function of the retromer-associated DNAJ protein Rme-8 in vivo, we demonstrate a critical role in regulating Notch receptor recycling. In the absence of Rme-8, Notch accumulated in enlarged tubulated Rab4-positive endosomes, and as a consequence, signaling was compromised. Strikingly, when the retromer component Vps26 was depleted at the same time, Notch no longer accumulated and instead was ectopically activated. Likewise, depletion of ESCRT-0 components Hrs or Stam in combination with Rme-8 also led to high levels of ectopic Notch activity. Together, these results highlight the importance of Rme-8 in coordinating normal endocytic recycling route and reveal that its absence predisposes toward conditions in which pathological Notch signaling can occur.
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Affiliation(s)
- Maria J Gomez-Lamarca
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, England, UK
| | - Laura A Snowdon
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, England, UK
| | - Ekatarina Seib
- Institute of Genetics, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Thomas Klein
- Institute of Genetics, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Sarah J Bray
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, England, UK
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21
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Brazil DP, Church RH, Surae S, Godson C, Martin F. BMP signalling: agony and antagony in the family. Trends Cell Biol 2015; 25:249-64. [DOI: 10.1016/j.tcb.2014.12.004] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 12/01/2014] [Accepted: 12/02/2014] [Indexed: 01/14/2023]
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22
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Santonico E, Mattioni A, Panni S, Belleudi F, Mattei M, Torrisi MR, Cesareni G, Castagnoli L. RNF11 is a GGA protein cargo and acts as a molecular adaptor for GGA3 ubiquitination mediated by Itch. Oncogene 2014; 34:3377-90. [DOI: 10.1038/onc.2014.256] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 07/04/2014] [Accepted: 07/08/2014] [Indexed: 11/09/2022]
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23
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Holleman J, Marchese A. The ubiquitin ligase deltex-3l regulates endosomal sorting of the G protein-coupled receptor CXCR4. Mol Biol Cell 2014; 25:1892-904. [PMID: 24790097 PMCID: PMC4055268 DOI: 10.1091/mbc.e13-10-0612] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
G protein-coupled receptor (GPCR) sorting into the degradative pathway is important for limiting the duration and magnitude of signaling. Agonist activation of the GPCR CXCR4 induces its rapid ubiquitination and sorting to lysosomes via the endosomal sorting complex required for transport (ESCRT) pathway. We recently reported that ESCRT-0 ubiquitination is linked to the efficiency with which CXCR4 is sorted for lysosomal degradation; however mechanistic insight is lacking. Here we define a novel role for the really interesting new gene-domain E3 ubiquitin ligase deltex-3-like (DTX3L) in regulating CXCR4 sorting from endosomes to lysosomes. We show that DTX3L localizes to early endosomes upon CXCR4 activation and interacts directly with and inhibits the activity of the E3 ubiquitin ligase atrophin-1 interacting protein 4. This serves to limit the extent to which ESCRT-0 is ubiquitinated and is able to sort CXCR4 for lysosomal degradation. Therefore we define a novel role for DTX3L in GPCR endosomal sorting and reveal an unprecedented link between two distinct E3 ubiquitin ligases to control the activity of the ESCRT machinery.
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Affiliation(s)
- Justine Holleman
- Department of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Adriano Marchese
- Department of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
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24
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Larriba MJ, González-Sancho JM, Bonilla F, Muñoz A. Interaction of vitamin D with membrane-based signaling pathways. Front Physiol 2014; 5:60. [PMID: 24600406 PMCID: PMC3927071 DOI: 10.3389/fphys.2014.00060] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 01/30/2014] [Indexed: 12/28/2022] Open
Abstract
Many studies in different biological systems have revealed that 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3) modulates signaling pathways triggered at the plasma membrane by agents such as Wnt, transforming growth factor (TGF)-β, epidermal growth factor (EGF), and others. In addition, 1α,25(OH)2D3 may affect gene expression by paracrine mechanisms that involve the regulation of cytokine or growth factor secretion by neighboring cells. Moreover, post-transcriptional and post-translational effects of 1α,25(OH)2D3 add to or overlap with its classical modulation of gene transcription rate. Together, these findings show that vitamin D receptor (VDR) cannot be considered only as a nuclear-acting, ligand-modulated transcription factor that binds to and controls the transcription of target genes. Instead, available data support the view that much of the complex biological activity of 1α,25(OH)2D3 resides in its capacity to interact with membrane-based signaling pathways and to modulate the expression and secretion of paracrine factors. Therefore, we propose that future research in the vitamin D field should focus on the interplay between 1α,25(OH)2D3 and agents that act at the plasma membrane, and on the analysis of intercellular communication. Global analyses such as RNA-Seq, transcriptomic arrays, and genome-wide ChIP are expected to dissect the interactions at the gene and molecular levels.
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Affiliation(s)
- María Jesús Larriba
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
| | - José Manuel González-Sancho
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
| | - Félix Bonilla
- Department of Medical Oncology, Hospital Universitario Puerta de Hierro Majadahonda Majadahonda, Spain
| | - Alberto Muñoz
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
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25
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Goldenring JR. A central role for vesicle trafficking in epithelial neoplasia: intracellular highways to carcinogenesis. Nat Rev Cancer 2013; 13:813-20. [PMID: 24108097 PMCID: PMC4011841 DOI: 10.1038/nrc3601] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Epithelial cell carcinogenesis involves the loss of cell polarity, alteration of polarized protein presentation, dynamic cell morphology changes, increased proliferation, and increased cell motility and invasion. Membrane vesicle trafficking underlies all of these processes. Specific membrane trafficking regulators, including RAB small GTPases, through the coordinated dynamics of intracellular trafficking along cytoskeletal pathways, determine the cell surface presentation of proteins and the overall function of both differentiated and neoplastic cells. Although mutations in vesicle trafficking proteins may not be direct drivers of transformation, components of the machinery of vesicle movement have crucial roles in the phenotypes of neoplastic cells. Therefore, the regulators of membrane vesicle trafficking decisions are essential mediators of the full range of cell physiologies that drive cancer cell biology, including initial loss of cell polarity, invasion and metastasis. Targeting of these fundamental intracellular processes may permit the manipulation of cancer cell behaviour.
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Affiliation(s)
- James R Goldenring
- Departments of Surgery and Cell and Developmental Biology, Epithelial Biology Center and the Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA; and the Nashville Veternas Affairs Medical Center, Nashville, Tennessee 37212, USA
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26
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Schink KO, Raiborg C, Stenmark H. Phosphatidylinositol 3-phosphate, a lipid that regulates membrane dynamics, protein sorting and cell signalling. Bioessays 2013; 35:900-12. [PMID: 23881848 DOI: 10.1002/bies.201300064] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Phosphatidylinositol 3-phosphate (PtdIns3P) is generated on the cytosolic leaflet of cellular membranes, primarily by phosphorylation of phosphatidylinositol by class II and class III phosphatidylinositol 3-kinases. The bulk of this lipid is found on the limiting and intraluminal membranes of endosomes, but it can also be detected in domains of phagosomes, autophagosome precursors, cytokinetic bridges, the plasma membrane and the nucleus. PtdIns3P controls cellular functions through recruitment of specific protein effectors, many of which contain FYVE or PX domains. Cellular processes known to be controlled by PtdIns3P and its effectors include endosomal fusion, sorting and motility, autophagy, cytokinesis, regulated exocytosis and signal transduction. Here we discuss how Ptdins3P is generated on specific cellular membranes, how its localizations and functions can be studied, and how its effectors serve to control cellular functions.
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Affiliation(s)
- Kay O Schink
- Faculty of Medicine, Centre for Cancer Biomedicine, University of Oslo, Montebello, Oslo, Norway; Department of Biochemistry, Institute for Cancer Research, Oslo University Hospital, Montebello, Oslo, Norway
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