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Sengupta S, Yaeger JD, Schultz MM, Francis KR. Dishevelled localization and function are differentially regulated by structurally distinct sterols. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.14.593701. [PMID: 38798572 PMCID: PMC11118412 DOI: 10.1101/2024.05.14.593701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The Dishevelled (DVL) family of proteins form supramolecular protein and lipid complexes at the cytoplasmic interface of the plasma membrane to regulate tissue patterning, proliferation, cell polarity, and oncogenic processes through DVL-dependent signaling, such as Wnt/β-catenin. While DVL binding to cholesterol is required for its membrane association, the specific structural requirements and cellular impacts of DVL-sterol association are unclear. We report that intracellular sterols which accumulate within normal and pathological conditions cause aberrant DVL activity. In silico and molecular analyses suggested orientation of the β- and α-sterol face within the DVL-PDZ domain regulates DVL-sterol binding. Intracellular accumulation of naturally occurring sterols impaired DVL2 plasma membrane association, inducing DVL2 nuclear localization via Foxk2. Changes to intracellular sterols also selectively impaired DVL2 protein-protein interactions This work identifies sterol specificity as a regulator of DVL signaling, suggests intracellular sterols cause distinct impacts on DVL activity, and supports a role for intracellular sterol homeostasis in cell signaling.
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Affiliation(s)
- Sonali Sengupta
- Cellular Therapies and Stem Cell Biology Group, Sanford Research, Sioux Falls, SD, 57104, USA
| | - Jazmine D.W. Yaeger
- Cellular Therapies and Stem Cell Biology Group, Sanford Research, Sioux Falls, SD, 57104, USA
| | - Maycie M. Schultz
- Cellular Therapies and Stem Cell Biology Group, Sanford Research, Sioux Falls, SD, 57104, USA
| | - Kevin R. Francis
- Cellular Therapies and Stem Cell Biology Group, Sanford Research, Sioux Falls, SD, 57104, USA
- Department of Pediatrics, University of South Dakota Sanford School of Medicine, Sioux Falls, SD, 57105, USA
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2
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Fei H, Shi X, Li S, Li Y, Yin X, Wu Z, Wang W, Shi H, Li R. DEPDC1B enhances malignant phenotypes of multiple myeloma through upregulating CCNB1 and inhibiting p53 signaling pathway. Tissue Cell 2024; 86:102263. [PMID: 37979396 DOI: 10.1016/j.tice.2023.102263] [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: 06/15/2023] [Revised: 10/27/2023] [Accepted: 11/02/2023] [Indexed: 11/20/2023]
Abstract
The identification and investigation of key molecules involved in the pathogenesis of multiple myeloma (MM) hold paramount clinical significance. This study primarily focuses on elucidating the role of DEPDC1B within the context of MM. Our findings robustly affirm the abundant expression of DEPDC1B in MM tissues and cell lines. Notably, DEPDC1B depletion exerted inhibitory effects on MM cell proliferation and migration while concurrently facilitating apoptosis and G2 cell cycle arrest. These outcomes stand in stark contrast to the consequences of DEPDC1B overexpression. Furthermore, we identified CCNB1 as a putative downstream target, characterized by a co-expression pattern with DEPDC1B, mediating DEPDC1B's regulatory influence on MM. Additionally, our results suggest that DEPDC1B knockdown may activate the p53 pathway, thereby impeding MM progression. To corroborate these in vitro findings, we conducted in vivo experiments that further validate the regulatory role of DEPDC1B in MM and its interaction with CCNB1 and the p53 pathway. Collectively, our research underscores DEPDC1B as a potent promoter in the development of MM, representing a promising therapeutic target for MM treatment. This discovery bears significant implications for future investigations in this field.
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Affiliation(s)
- Hairong Fei
- Department of Hematology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xue Shi
- Department of Hematology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Saisai Li
- Department of Hematology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Ying Li
- Department of Hematology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xiangcong Yin
- Hematology Diagnosis Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Zengjie Wu
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Wei Wang
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Hailei Shi
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Ran Li
- Department of Medical Oncology, Affiliated Qingdao Central Hospital Qingdao University, Qingdao, Shandong, China.
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Alshahrani SH, Rakhimov N, Rana A, Alsaab HO, Hjazi A, Adile M, Abosaooda M, Abdulhussien Alazbjee AA, Alsalamy A, Mahmoudi R. Dishevelled: An emerging therapeutic oncogene in human cancers. Pathol Res Pract 2023; 250:154793. [PMID: 37683388 DOI: 10.1016/j.prp.2023.154793] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/24/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023]
Abstract
Cancer is a multifaceted and complex disorder characterized by uncontrolled rates of cell proliferation and its ability to spread and attack other organs. Emerging data indicated several pathways and molecular targets are engaged in cancer progression. Among them, the Wnt signaling pathway was shown to have a crucial role in cancer onset and progression. Dishevelled (DVL) acts in a branch point of canonical and non-canonical Wnt pathway. DVL not only acts in the cytoplasm to inactivate the destruction complex of β-catenin but is also transported into the nucleus to affect the transcription of target genes. Available data revealed that the expression levels of DVL increased in cell and clinical specimens of various cancers, proposing that it may have an oncogenic role. DVL promoted cell invasion, migration, cell cycle, survival, proliferation, 3D-spheroid formation, stemness, and epithelial mesenchymal transition (EMT) and it suppressed cell apoptosis. The higher levels of DVL is associated with the clinicopathological characteristic of cancer-affected patients, including lymph node metastasis, tumor grade, histological type, and age. In addition, the higher levels of DVL could be a promising diagnostic and prognostic biomarker in cancer as well as it could be a mediator in cancer chemoresistance to Methotrexate, paclitaxel, and 5-fluorouracil. This study aimed to investigate the underlying molecular mechanism of DVL in cancer pathogenesis as well as to explore its importance in cancer diagnosis and prognosis as well as its role as a mediator in cancer chemotherapy.
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Affiliation(s)
| | - Nodir Rakhimov
- Department of Oncology, Samarkand State Medical University, Amir Temur Street 18, Samarkand, Uzbekistan; Department of Scientific Affairs,Tashkent State Dental Institute, Makhtumkuli 103, Tashkent, Uzbekistan
| | - Arti Rana
- Uttaranchal Institute of Technology, Uttaranchal University, Dehradun 248007, India
| | - Hashem O Alsaab
- Pharmaceutics and Pharmaceutical Technology, Taif University, Taif, Saudi Arabia
| | - Ahmed Hjazi
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohaned Adile
- Medical Technical College, Al-Farahidi University, Baghdad, Iraq
| | | | | | - Ali Alsalamy
- College of Technical Engineering, Imam Ja'afar Al-Sadiq University, Al-Muthanna 66002, Iraq
| | - Reza Mahmoudi
- Department of Toxicology and Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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4
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Jowsey W, Morris CP, Hall D, Sullivan J, Fagerlund R, Eto K, Solomon P, Mackay J, Bond C, Ramsay J, Ronson C. DUF2285 is a novel helix-turn-helix domain variant that orchestrates both activation and antiactivation of conjugative element transfer in proteobacteria. Nucleic Acids Res 2023; 51:6841-6856. [PMID: 37246713 PMCID: PMC10359603 DOI: 10.1093/nar/gkad457] [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: 02/16/2023] [Revised: 05/04/2023] [Accepted: 05/12/2023] [Indexed: 05/30/2023] Open
Abstract
Horizontal gene transfer is tightly regulated in bacteria. Often only a fraction of cells become donors even when regulation of horizontal transfer is coordinated at the cell population level by quorum sensing. Here, we reveal the widespread 'domain of unknown function' DUF2285 represents an 'extended-turn' variant of the helix-turn-helix domain that participates in both transcriptional activation and antiactivation to initiate or inhibit horizontal gene transfer. Transfer of the integrative and conjugative element ICEMlSymR7A is controlled by the DUF2285-containing transcriptional activator FseA. One side of the DUF2285 domain of FseA has a positively charged surface which is required for DNA binding, while the opposite side makes critical interdomain contacts with the N-terminal FseA DUF6499 domain. The QseM protein is an antiactivator of FseA and is composed of a DUF2285 domain with a negative surface charge. While QseM lacks the DUF6499 domain, it can bind the FseA DUF6499 domain and prevent transcriptional activation by FseA. DUF2285-domain proteins are encoded on mobile elements throughout the proteobacteria, suggesting regulation of gene transfer by DUF2285 domains is a widespread phenomenon. These findings provide a striking example of how antagonistic domain paralogues have evolved to provide robust molecular control over the initiation of horizontal gene transfer.
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Affiliation(s)
- William J Jowsey
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
| | - Calum R P Morris
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
| | - Drew A Hall
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
- Curtin Medical School and Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia
| | - John T Sullivan
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
| | - Robert D Fagerlund
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
| | - Karina Y Eto
- Curtin Medical School and Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia
| | - Paul D Solomon
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia
| | - Joel P Mackay
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia
| | - Charles S Bond
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
- Marshall Centre for Infectious Disease Research and Training, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Joshua P Ramsay
- Curtin Medical School and Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia
| | - Clive W Ronson
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
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Han F, Cheng C, Xu Q, Chen J, Yang Z, Liu J. DEPDC1B promotes colorectal cancer via facilitating cell proliferation and migration while inhibiting apoptosis. Cell Cycle 2023; 22:131-143. [PMID: 36016512 PMCID: PMC9769448 DOI: 10.1080/15384101.2022.2110439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/27/2022] [Accepted: 08/03/2022] [Indexed: 01/20/2023] Open
Abstract
Colorectal cancer (CRC) is a common malignant tumor with strong invasiveness. Given the reported involvement of DEP domain-containing protein 1B (DEPDC1B) in the progression of some cancers, its role in CRC was explored in this study. DEPDC1B expression in CRC was assessed based on database and tissue microarray (TMA). In addition, the knockdown and overexpression of DEPDC1B in CRC cell lines were constructed using small hairpin RNA (shRNA) interference. The biological function of DEPDC1B in CRC was evaluated in vitro and in vivo through loss/gain-of-function assays. The results demonstrated that DEPDC1B was highly expressed in CRC. Furthermore, DEPDC1B had the ability to promote CRC proliferation and migration coupled by cell apoptosis. In vivo results showed that DEPDC1B knockdown significantly inhibited the growth of xenograft tumors. Additionally, the results of antibody array indicated increased apoptosis-promoting proteins and decreased apoptosis-inhibiting proteins in DEPDC1B-knockdown CRC cells. In conclusion, DEPDC1B played a key driver role in CRC progression, and inhibition of its expression may be a potential target for precision medicine in CRC.
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Affiliation(s)
- Fei Han
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Chao Cheng
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qianqian Xu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jisong Chen
- The Second College of Clinical Medical Science, China Three Gorges University, Yichang, Hubei, China
| | - Zhaohui Yang
- Department of Rehabilitation, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jun Liu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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6
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Falginella FL, Kravec M, Drabinová M, Paclíková P, Bryja V, Vácha R. Binding of DEP domain to phospholipid membranes: More than just electrostatics. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183983. [PMID: 35750206 DOI: 10.1016/j.bbamem.2022.183983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 05/06/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Over the past decades an extensive effort has been made to provide a more comprehensive understanding of Wnt signaling, yet many regulatory and structural aspects remain elusive. Among these, the ability of Dishevelled (DVL) protein to relocalize at the plasma membrane is a crucial step in the activation of all Wnt pathways. The membrane binding of DVL was suggested to be mediated by the preferential interaction of its C-terminal DEP domain with phosphatidic acid (PA). However, due to the scarcity and fast turnover of PA, we investigated the role on the membrane association of other more abundant phospholipids. The combined results from computational simulations and experimental measurements with various model phospholipid membranes, demonstrate that the membrane binding of DEP/DVL constructs is governed by the concerted action of generic electrostatics and finely-tuned intermolecular interactions with individual lipid species. In particular, while we confirmed the strong preference for PA lipid, we also observed a weak but non-negligible affinity for phosphatidylserine, the most abundant anionic phospholipid in the plasma membrane, and phosphatidylinositol 4,5-bisphosphate. The obtained molecular insight into DEP-membrane interaction helps to elucidate the relation between changes in the local membrane composition and the spatiotemporal localization of DVL and, possibly, other DEP-containing proteins.
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Affiliation(s)
- Francesco L Falginella
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Marek Kravec
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 62500, Czech Republic
| | - Martina Drabinová
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Petra Paclíková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 62500, Czech Republic
| | - Vítĕzslav Bryja
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 62500, Czech Republic; Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Brno 612 65, Czech Republic
| | - Robert Vácha
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic.
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7
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Fina ME, Wang J, Vedula P, Tang HY, Kashina A, Dong DW. Arginylation Regulates G-protein Signaling in the Retina. Front Cell Dev Biol 2022; 9:807345. [PMID: 35127722 PMCID: PMC8815403 DOI: 10.3389/fcell.2021.807345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/17/2021] [Indexed: 12/03/2022] Open
Abstract
Arginylation is a post-translational modification mediated by the arginyltransferase (Ate1). We recently showed that conditional deletion of Ate1 in the nervous system leads to increased light-evoked response sensitivities of ON-bipolar cells in the retina, indicating that arginylation regulates the G-protein signaling complexes of those neurons and/or photoreceptors. However, none of the key players in the signaling pathway were previously shown to be arginylated. Here we show that Gαt1, Gβ1, RGS6, and RGS7 are arginylated in the retina and RGS6 and RGS7 protein levels are elevated in Ate1 knockout, suggesting that arginylation plays a direct role in regulating their protein level and the G-protein-mediated responses in the retina.
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Affiliation(s)
- Marie E. Fina
- Department of Biomedical Sciences, School of Veterinary Medicines, University of Pennsylvania, Philadelphia, PA, United States
| | - Junling Wang
- Department of Biomedical Sciences, School of Veterinary Medicines, University of Pennsylvania, Philadelphia, PA, United States
| | - Pavan Vedula
- Department of Biomedical Sciences, School of Veterinary Medicines, University of Pennsylvania, Philadelphia, PA, United States
| | - Hsin-Yao Tang
- Proteomics and Metabolomics Facility, The Wistar Institute, Philadelphia, PA, United States
| | - Anna Kashina
- Department of Biomedical Sciences, School of Veterinary Medicines, University of Pennsylvania, Philadelphia, PA, United States
- *Correspondence: Anna Kashina, ; Dawei W. Dong,
| | - Dawei W. Dong
- Department of Biomedical Sciences, School of Veterinary Medicines, University of Pennsylvania, Philadelphia, PA, United States
- Institute for Biomedical Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- *Correspondence: Anna Kashina, ; Dawei W. Dong,
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Fan X, Wen J, Bao L, Gao F, Li Y, He D. Identification and Validation of DEPDC1B as an Independent Early Diagnostic and Prognostic Biomarker in Liver Hepatocellular Carcinoma. Front Genet 2022; 12:681809. [PMID: 35095994 PMCID: PMC8793833 DOI: 10.3389/fgene.2021.681809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022] Open
Abstract
Liver hepatocellular carcinoma (LIHC) is one of the most lethal tumors worldwide, and while its detailed mechanism of occurrence remains unclear, an early diagnosis of LIHC could significantly improve the 5-years survival of LIHC patients. It is therefore imperative to explore novel molecular markers for the early diagnosis and to develop efficient therapies for LIHC patients. Currently, DEPDC1B has been reported to participate in the regulation of cell mitosis, transcription, and tumorigenesis. To explore the valuable diagnostic and prognostic markers for LIHC and further elucidate the mechanisms underlying DEPDC1B-related LIHC, numerous databases, such as Oncomine, Gene Expression Profiling Interactive Analysis (GEPIA), UALCAN, Kaplan-Meier plotter, and The Cancer Genome Atlas (TCGA) were employed to determine the association between the expression of DEPDC1B and prognosis in LIHC patients. Generally, the DEPDC1B mRNA level was highly expressed in LIHC tissues, compared with that in normal tissues (p < 0.01). High DEPDC1B expression was associated with poor overall survival (OS) in LIHC patients, especially in stage II, IV, and grade I, II, III patients (all p < 0.05). The univariate and multivariate Cox regression analysis showed that DEPDC1B was an independent risk factor for OS among LIHC patients (HR = 1.3, 95% CI: 1.08–1.6, p = 0.007). In addition, the protein expression of DEPDC1B was validated using Human Protein Atlas database. Furthermore, the expression of DEPDC1B was confirmed by quantitative real-time polymerase chain reaction (qRT-PCR) assay using five pairs of matched LIHC tissues and their adjacent noncancerous tissues. The KEGG pathway analysis indicated that high expression of DEPDC1B may be associated with several signaling pathways, such as MAPK signaling, the regulation of actin cytoskeleton, p53 signaling, and the Wnt signaling pathways. Furthermore, high DEPDC1B expression may be significantly associated with various cancers. Conclusively, DEPDC1B may be an independent risk factor for OS among LIHC cancer patients and may be used as an early diagnostic marker in patients with LIHC.
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Affiliation(s)
- Xiaoyan Fan
- Department of Oncology, Hebei General Hospital, Shijiazhuang, China
| | - Junye Wen
- Department of Hepatobiliary Surgery, Hebei General Hospital, Shijiazhuang, China
| | - Lei Bao
- Department of Hepatobiliary Surgery, Hebei General Hospital, Shijiazhuang, China
| | - Fei Gao
- Department of Oncology, Hebei General Hospital, Shijiazhuang, China
| | - You Li
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Dongwei He
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
- *Correspondence: Dongwei He,
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Lebensohn AM, Bazan JF, Rohatgi R. Receptor control by membrane-tethered ubiquitin ligases in development and tissue homeostasis. Curr Top Dev Biol 2022; 150:25-89. [PMID: 35817504 DOI: 10.1016/bs.ctdb.2022.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Paracrine cell-cell communication is central to all developmental processes, ranging from cell diversification to patterning and morphogenesis. Precise calibration of signaling strength is essential for the fidelity of tissue formation during embryogenesis and tissue maintenance in adults. Membrane-tethered ubiquitin ligases can control the sensitivity of target cells to secreted ligands by regulating the abundance of signaling receptors at the cell surface. We discuss two examples of this emerging concept in signaling: (1) the transmembrane ubiquitin ligases ZNRF3 and RNF43 that regulate WNT and bone morphogenetic protein receptor abundance in response to R-spondin ligands and (2) the membrane-recruited ubiquitin ligase MGRN1 that controls Hedgehog and melanocortin receptor abundance. We focus on the mechanistic logic of these systems, illustrated by structural and protein interaction models enabled by AlphaFold. We suggest that membrane-tethered ubiquitin ligases play a widespread role in remodeling the cell surface proteome to control responses to extracellular ligands in diverse biological processes.
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10
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Wan Y, Szabo-Rogers HL. Chondrocyte Polarity During Endochondral Ossification Requires Protein-Protein Interactions Between Prickle1 and Dishevelled2/3. J Bone Miner Res 2021; 36:2399-2412. [PMID: 34423861 DOI: 10.1002/jbmr.4428] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/19/2021] [Accepted: 08/18/2021] [Indexed: 12/26/2022]
Abstract
The expansion and growth of the endochondral skeleton requires organized cell behaviors that control chondrocyte maturation and oriented division. In other organs, these processes are accomplished through Wnt/planar cell polarity (Wnt/PCP) signaling pathway and require the protein-protein interactions of core components including Prickle1 (PK1) and Dishevelled (DVL). To determine the function of Wnt/PCP signaling in endochondral ossification of the cranial base and limb, we utilized the Prickle1Beetlejuice (Pk1Bj ) mouse line. The Pk1Bj allele has a missense mutation in the PK1 LIM1 domain that results in a hypomorphic protein. Similar to human patients with Robinow syndrome, the Prickle1Bj/Bj mouse mutants lack growth plate expansion resulting in shorter limbs and midfacial hypoplasia. Within the Prickle1Bj/Bj limb and cranial base growth plates we observe precocious maturation of chondrocytes and stalling of terminal differentiation. Intriguingly, we observed that the growth plate chondrocytes have randomized polarity based on the location of the primary cilia and the location of PRICKLE1, DVL2, and DVL3 localization. Importantly, mutant PK1Bj protein has decreased protein-protein interactions with both DVL2 and DVL3 in chondrocytes as revealed by in vivo co-immunoprecipitation and proximity ligation assays. Finally, we propose a model where the interaction between the Prickle1 LIM1 domain and DVL2 and DVL3 contributes to chondrocyte polarity and contributes to proximal-distal outgrowth of endochondral elements. © 2021 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Yong Wan
- Department of Oral and Craniofacial Sciences, School of Dental Medicine, Center for Craniofacial Regeneration, University of Pittsburgh, Pittsburgh, PA, USA
| | - Heather L Szabo-Rogers
- Department of Oral and Craniofacial Sciences, School of Dental Medicine, Center for Craniofacial Regeneration, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Developmental Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,McGowan Institute for Regenerative Medicine, Pittsburgh, PA, USA
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11
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Micka M, Bryja V. Can We Pharmacologically Target Dishevelled: The Key Signal Transducer in the Wnt Pathways? Handb Exp Pharmacol 2021; 269:117-135. [PMID: 34382124 DOI: 10.1007/164_2021_527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dishevelled (DVL) is the central signal transducer in both Wnt/β-catenin-dependent and independent signalling pathways. DVL is required to connect receptor complexes and downstream effectors. Since proximal Wnt pathway components and DVL itself are upregulated in many types of cancer, DVL represents an attractive therapeutic target in the Wnt-addicted cancers and other disorders caused by aberrant Wnt signalling. Here, we discuss progress in several approaches for the modulation of DVL function and hence inhibition of the Wnt signalling. Namely, we sum up the potential of modulation of enzymes that control post-translational modification of DVL - such as inhibition of DVL kinases or promotion of DVL ubiquitination and degradation. In addition, we discuss research directions that can take advantage of direct interaction with the protein domains essential for DVL function: the inhibition of DIX- and DEP-domain mediated polymerization and interaction of DVL PDZ domain with its ligands.
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Affiliation(s)
- Miroslav Micka
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Vítězslav Bryja
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic. .,Department of Cytokinetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
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12
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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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13
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Kamdem N, Roske Y, Kovalskyy D, Platonov M, Balinskyi O, Kreuchwig A, Saupe J, Fang L, Diehl A, Schmieder P, Krause G, Rademann J, Heinemann U, Birchmeier W, Oschkinat H. Small-molecule inhibitors of the PDZ domain of Dishevelled proteins interrupt Wnt signalling. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2021; 2:355-374. [PMID: 37904770 PMCID: PMC10539800 DOI: 10.5194/mr-2-355-2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/28/2021] [Indexed: 11/01/2023]
Abstract
Dishevelled (Dvl) proteins are important regulators of the Wnt signalling pathway, interacting through their PDZ domains with the Wnt receptor Frizzled. Blocking the Dvl PDZ-Frizzled interaction represents a potential approach for cancer treatment, which stimulated the identification of small-molecule inhibitors, among them the anti-inflammatory drug Sulindac and Ky-02327. Aiming to develop tighter binding compounds without side effects, we investigated structure-activity relationships of sulfonamides. X-ray crystallography showed high complementarity of anthranilic acid derivatives in the GLGF loop cavity and space for ligand growth towards the PDZ surface. Our best binding compound inhibits Wnt signalling in a dose-dependent manner as demonstrated by TOP-GFP assays (IC50 ∼ 50 µ M ) and Western blotting of β -catenin levels. Real-time PCR showed reduction in the expression of Wnt-specific genes. Our compound interacted with Dvl-1 PDZ (KD = 2.4 µ M ) stronger than Ky-02327 and may be developed into a lead compound interfering with the Wnt pathway.
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Affiliation(s)
- Nestor Kamdem
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Yvette Roske
- Max Delbrück Center for Molecular Medicine, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Dmytro Kovalskyy
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine
- ChemBio Ctr, Taras Shevchenko National University of Kyiv, 62 Volodymyrska, Kyiv 01033, Ukraine
| | - Maxim O. Platonov
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine
- ChemBio Ctr, Taras Shevchenko National University of Kyiv, 62 Volodymyrska, Kyiv 01033, Ukraine
| | - Oleksii Balinskyi
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine
- ChemBio Ctr, Taras Shevchenko National University of Kyiv, 62 Volodymyrska, Kyiv 01033, Ukraine
| | - Annika Kreuchwig
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Jörn Saupe
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Liang Fang
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
- Max Delbrück Center for Molecular Medicine, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Anne Diehl
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Peter Schmieder
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Gerd Krause
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Jörg Rademann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Pharmazie, Freie Universität Berlin, Königin-Luise-Straße 2 + 4, 14195 Berlin, Germany
| | - Udo Heinemann
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
- Max Delbrück Center for Molecular Medicine, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Walter Birchmeier
- Max Delbrück Center for Molecular Medicine, Robert-Rössle-Straße 10, 13125 Berlin, Germany
| | - Hartmut Oschkinat
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
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14
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The structural biology of canonical Wnt signalling. Biochem Soc Trans 2021; 48:1765-1780. [PMID: 32725184 PMCID: PMC7458405 DOI: 10.1042/bst20200243] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 12/17/2022]
Abstract
The Wnt signalling pathways are of great importance in embryonic development and oncogenesis. Canonical and non-canonical Wnt signalling pathways are known, with the canonical (or β-catenin dependent) pathway being perhaps the best studied of these. While structural knowledge of proteins and interactions involved in canonical Wnt signalling has accumulated over the past 20 years, the pace of discovery has increased in recent years, with the structures of several key proteins and assemblies in the pathway being released. In this review, we provide a brief overview of canonical Wnt signalling, followed by a comprehensive overview of currently available X-ray, NMR and cryoEM data elaborating the structures of proteins and interactions involved in canonical Wnt signalling. While the volume of structures available is considerable, numerous gaps in knowledge remain, particularly a comprehensive understanding of the assembly of large multiprotein complexes mediating key aspects of pathway, as well as understanding the structure and activation of membrane receptors in the pathway. Nonetheless, the presently available data affords considerable opportunities for structure-based drug design efforts targeting canonical Wnt signalling.
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15
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El Sabeh M, Saha SK, Afrin S, Islam MS, Borahay MA. Wnt/β-catenin signaling pathway in uterine leiomyoma: role in tumor biology and targeting opportunities. Mol Cell Biochem 2021; 476:3513-3536. [PMID: 33999334 DOI: 10.1007/s11010-021-04174-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 04/28/2021] [Indexed: 02/06/2023]
Abstract
Uterine leiomyoma is the most common tumor of the female reproductive system and originates from a single transformed myometrial smooth muscle cell. Despite the immense medical, psychosocial, and financial impact, the exact underlying mechanisms of leiomyoma pathobiology are poorly understood. Alterations of signaling pathways are thought to be instrumental in leiomyoma biology. Wnt/β-catenin pathway appears to be involved in several aspects of the genesis of leiomyomas. For example, Wnt5b is overexpressed in leiomyoma, and the Wnt/β-catenin pathway appears to mediate the role of MED12 mutations, the most common mutations in leiomyoma, in tumorigenesis. Moreover, Wnt/β-catenin pathway plays a paracrine role where estrogen/progesterone treatment of mature myometrial or leiomyoma cells leads to increased expression of Wnt11 and Wnt16, which induces proliferation of leiomyoma stem cells and tumor growth. Constitutive activation of β-catenin leads to myometrial hyperplasia and leiomyoma-like lesions in animal models. Wnt/β-catenin signaling is also closely involved in mechanotransduction and extracellular matrix regulation and relevant alterations in leiomyoma, and crosstalk is noted between Wnt/β-catenin signaling and other pathways known to regulate leiomyoma development and growth such as estrogen, progesterone, TGFβ, PI3K/Akt/mTOR, Ras/Raf/MEK/ERK, IGF, Hippo, and Notch signaling. Finally, evidence suggests that inhibition of the canonical Wnt pathway using β-catenin inhibitors inhibits leiomyoma cell proliferation. Understanding the molecular mechanisms of leiomyoma development is essential for effective treatment. The specific Wnt/β-catenin pathway molecules discussed in this review constitute compelling candidates for therapeutic targeting.
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Affiliation(s)
- Malak El Sabeh
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Subbroto Kumar Saha
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Sadia Afrin
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Md Soriful Islam
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA
| | - Mostafa A Borahay
- Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD, 21205, USA.
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16
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Dumortier C, Danopoulos S, Velard F, Al Alam D. Bone Cells Differentiation: How CFTR Mutations May Rule the Game of Stem Cells Commitment? Front Cell Dev Biol 2021; 9:611921. [PMID: 34026749 PMCID: PMC8139249 DOI: 10.3389/fcell.2021.611921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 04/12/2021] [Indexed: 12/30/2022] Open
Abstract
Cystic fibrosis (CF)-related bone disease has emerged as a significant comorbidity of CF and is characterized by decreased bone formation and increased bone resorption. Both osteoblast and osteoclast differentiations are impacted by cystic fibrosis transmembrane conductance regulator (CFTR) mutations. The defect of CFTR chloride channel or the loss of CFTRs ability to interact with other proteins affect several signaling pathways involved in stem cell differentiation and the commitment of these cells toward bone lineages. Specifically, TGF-, nuclear factor-kappa B (NF-B), PI3K/AKT, and MAPK/ERK signaling are disturbed by CFTR mutations, thus perturbing stem cell differentiation. High inflammation in patients changes myeloid lineage secretion, affecting both myeloid and mesenchymal differentiation. In osteoblast, Wnt signaling is impacted, resulting in consequences for both bone formation and resorption. Finally, CFTR could also have a direct role in osteoclasts resorptive function. In this review, we summarize the existing literature on the role of CFTR mutations on the commitment of induced pluripotent stem cells to bone cells.
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Affiliation(s)
- Claire Dumortier
- Division of Neonatology, Department of Pediatrics, Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, CA, United States.,Universit de Reims Champagne-Ardenne, BIOS EA 4691, Reims, France
| | - Soula Danopoulos
- Division of Neonatology, Department of Pediatrics, Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, CA, United States
| | - Frdric Velard
- Universit de Reims Champagne-Ardenne, BIOS EA 4691, Reims, France
| | - Denise Al Alam
- Division of Neonatology, Department of Pediatrics, Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, CA, United States
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17
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Bayle E, Svensson F, Atkinson BN, Steadman D, Willis NJ, Woodward HL, Whiting P, Vincent JP, Fish PV. Carboxylesterase Notum Is a Druggable Target to Modulate Wnt Signaling. J Med Chem 2021; 64:4289-4311. [PMID: 33783220 PMCID: PMC8172013 DOI: 10.1021/acs.jmedchem.0c01974] [Citation(s) in RCA: 11] [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: 11/14/2020] [Indexed: 12/12/2022]
Abstract
Regulation of the Wnt signaling pathway is critically important for a number of cellular processes in both development and adult mammalian biology. This Perspective will provide a summary of current and emerging therapeutic opportunities in modulating Wnt signaling, especially through inhibition of Notum carboxylesterase activity. Notum was recently shown to act as a negative regulator of Wnt signaling through the removal of an essential palmitoleate group. Inhibition of Notum activity may represent a new approach to treat disease where aberrant Notum activity has been identified as the underlying cause. Reliable screening technologies are available to identify inhibitors of Notum, and structural studies are accelerating the discovery of new inhibitors. A selection of these hits have been optimized to give fit-for-purpose small molecule inhibitors of Notum. Three noteworthy examples are LP-922056 (26), ABC99 (27), and ARUK3001185 (28), which are complementary chemical tools for exploring the role of Notum in Wnt signaling.
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Affiliation(s)
- Elliott
D. Bayle
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
- The
Francis Crick Institute, 1 Midland Road, Kings Cross, London NW1 1AT, U.K.
| | - Fredrik Svensson
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
- The
Francis Crick Institute, 1 Midland Road, Kings Cross, London NW1 1AT, U.K.
| | - Benjamin N. Atkinson
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
| | - David Steadman
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
| | - Nicky J. Willis
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
| | - Hannah L. Woodward
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
| | - Paul Whiting
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
| | - Jean-Paul Vincent
- The
Francis Crick Institute, 1 Midland Road, Kings Cross, London NW1 1AT, U.K.
| | - Paul V. Fish
- Alzheimer’s
Research UK UCL Drug Discovery Institute, University College London, Cruciform Building, Gower Street, London WC1E 6BT, U.K.
- The
Francis Crick Institute, 1 Midland Road, Kings Cross, London NW1 1AT, U.K.
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18
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Structural Basis of DEPTOR to Recognize Phosphatidic Acid Using its Tandem DEP Domains. J Mol Biol 2021; 433:166989. [PMID: 33865870 DOI: 10.1016/j.jmb.2021.166989] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/06/2021] [Accepted: 04/06/2021] [Indexed: 11/21/2022]
Abstract
DEP domain containing mTOR-interacting protein (DEPTOR) plays pivotal roles in regulating metabolism, growth, autophagy and apoptosis by functions as an endogenous inhibitor of mTOR signaling pathway. Activated by phosphatidic acid, a second messenger in mTOR signaling, DEPTOR dissociates from mTORC1 complex with unknown mechanism. Here, we present a 1.5 Å resolution crystal structure, which shows that the N-terminal two tandem DEP domains of hDEPTOR fold into a dumbbell-shaped structure, protruding the characteristic β-hairpin arms of DEP domains on each side. An 18 amino acids DDEX motif at the end of DEP2 interacts with DEP1 and stabilizes the structure. Biochemical studies showed that the tandem DEP domains directly interact with phosphatidic acid using two distinct positively charged patches. These results provide insights into mTOR activation upon phosphatidic acid stimulation.
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19
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Liu Z, Wang P, Wold EA, Song Q, Zhao C, Wang C, Zhou J. Small-Molecule Inhibitors Targeting the Canonical WNT Signaling Pathway for the Treatment of Cancer. J Med Chem 2021; 64:4257-4288. [PMID: 33822624 DOI: 10.1021/acs.jmedchem.0c01799] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Canonical WNT signaling is an important developmental pathway that has attracted increased attention for anticancer drug discovery. From the production and secretion of WNT ligands, their binding to membrane receptors, and the β-catenin destruction complex to the expansive β-catenin transcriptional complex, multiple components have been investigated as drug targets to modulate WNT signaling. Significant progress in developing WNT inhibitors such as porcupine inhibitors, tankyrase inhibitors, β-catenin/coactivators, protein-protein interaction inhibitors, casein kinase modulators, DVL inhibitors, and dCTPP1 inhibitors has been made, with several candidates (e.g., LGK-974, PRI-724, and ETC-159) in human clinical trials. Herein we summarize recent progress in the drug discovery and development of small-molecule inhibitors targeting the canonical WNT pathway, focusing on their specific target proteins, in vitro and in vivo activities, physicochemical properties, and therapeutic potential. The relevant opportunities and challenges toward maintaining the balance between efficacy and toxicity in effectively targeting this pathway are also highlighted.
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Affiliation(s)
- Zhiqing Liu
- Institute of Evolution and Marine Biodiversity, College of Food Science and Technology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Pingyuan Wang
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch (UTMB), Galveston, Texas 77555, United States
| | - Eric A Wold
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch (UTMB), Galveston, Texas 77555, United States
| | - Qiaoling Song
- Institute of Evolution and Marine Biodiversity, College of Food Science and Technology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Chenyang Zhao
- Institute of Evolution and Marine Biodiversity, College of Food Science and Technology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Changyun Wang
- Institute of Evolution and Marine Biodiversity, College of Food Science and Technology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Jia Zhou
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch (UTMB), Galveston, Texas 77555, United States
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20
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Shi DL. Decoding Dishevelled-Mediated Wnt Signaling in Vertebrate Early Development. Front Cell Dev Biol 2020; 8:588370. [PMID: 33102490 PMCID: PMC7554312 DOI: 10.3389/fcell.2020.588370] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/15/2020] [Indexed: 12/22/2022] Open
Abstract
Dishevelled proteins are key players of Wnt signaling pathways. They transduce Wnt signals and perform cellular functions through distinct conserved domains. Due to the presence of multiple paralogs, the abundant accumulation of maternal transcripts, and the activation of distinct Wnt pathways, their regulatory roles during vertebrate early development and the mechanism by which they dictate the pathway specificity have been enigmatic and attracted much attention in the past decades. Extensive studies in different animal models have provided significant insights into the structure-function relationship of conserved Dishevelled domains in Wnt signaling and the implications of Dishevelled isoforms in early developmental processes. Notably, intra- and inter-molecular interactions and Dishevelled dosage may be important in modulating the specificity of Wnt signaling. There are also distinct and redundant functions among Dishevelled isoforms in development and disease, which may result from differential spatiotemporal expression patterns and biochemical properties and post-translational modifications. This review presents the advances and perspectives in understanding Dishevelled-mediated Wnt signaling during gastrulation and neurulation in vertebrate early embryos.
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Affiliation(s)
- De-Li Shi
- Developmental Biology Laboratory, CNRS-UMR 7622, IBPS, Sorbonne University, Paris, France
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21
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Gingras RM, Lwin KM, Miller AM, Bretscher A. Yeast Rgd3 is a phospho-regulated F-BAR-containing RhoGAP involved in the regulation of Rho3 distribution and cell morphology. Mol Biol Cell 2020; 31:2570-2582. [PMID: 32941095 PMCID: PMC7851877 DOI: 10.1091/mbc.e20-05-0288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Polarized growth requires the integration of polarity pathways with the delivery of exocytic vesicles for cell expansion and counterbalancing endocytic uptake. In budding yeast, the myosin-V Myo2 is aided by the kinesin-related protein Smy1 in carrying out the essential Sec4-dependent transport of secretory vesicles to sites of polarized growth. Overexpression suppressors of a conditional myo2 smy1 mutant identified a novel F-BAR (Fes/CIP4 homology-Bin-Amphiphysin-Rvs protein)-containing RhoGAP, Rgd3, that has activity primarily on Rho3, but also Cdc42. Internally tagged Rho3 is restricted to the plasma membrane in a gradient corresponding to cell polarity that is altered upon Rgd3 overexpression. Rgd3 itself is localized to dynamic polarized vesicles that, while distinct from constitutive secretory vesicles, are dependent on actin and Myo2 function. In vitro Rgd3 associates with liposomes in a PIP2-enhanced manner. Further, the Rgd3 C-terminal region contains several phosphorylatable residues within a reported SH3-binding motif. An unphosphorylated mimetic construct is active and highly polarized, while the phospho-mimetic form is not. Rgd3 is capable of activating Myo2, dependent on its phospho state, and Rgd3 overexpression rescues aberrant Rho3 localization and cell morphologies seen at the restrictive temperature in the myo2 smy1 mutant. We propose a model where Rgd3 functions to modulate and maintain Rho3 polarity during growth.
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Affiliation(s)
- Robert M Gingras
- Department of Molecular Biology and Genetics, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
| | - Kyaw Myo Lwin
- Department of Molecular Biology and Genetics, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
| | - Abigail M Miller
- Department of Molecular Biology and Genetics, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
| | - Anthony Bretscher
- Department of Molecular Biology and Genetics, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853
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22
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Chen X, Guo ZQ, Cao D, Chen Y, Chen J. Knockdown of DEPDC1B inhibits the development of glioblastoma. Cancer Cell Int 2020; 20:310. [PMID: 32684847 PMCID: PMC7362545 DOI: 10.1186/s12935-020-01404-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 07/06/2020] [Indexed: 11/10/2022] Open
Abstract
Background Glioblastoma (GBM) is the most common primary malignant brain tumor in adults with a poor prognosis. DEPDC1B (DEP domain-containing protein 1B) has been shown to be associated with some types of malignancies. However, the role and underlying regulatory mechanisms of DEPDC1B in GBM remain elusive. Methods In this research, the expression level of DEPDC1B in GBM tissues was detected by IHC. The DEPDC1B knockdown cell line was constructed, identified by qRT-PCR and western blot and used to construct the xenotransplantation mice model and intracranial xenograft model. MTT assay, colony formation assay, flow cytometry, and Transwell assay were used to detected cell proliferation, apoptosis and migration. Results The results proved that DEPDC1B was significantly upregulated in tumor tissues, and silencing DEPDC1B could inhibit proliferation, migration and promote apoptosis of GBM cell. In addition, human apoptosis antibody array detection showed that after DEPDC1B knockdown, the expression of apoptosis-related proteins was downregulated, such as IGFBP-2, Survivin, N-cadherin, Vimentin and Snail. Finally, we indicated that knockdown of DEPDC1B significantly inhibited tumor growth in vivo. Conclusions In summary, DEPDC1B was involved in the development and progression of GBM, which may be a potential therapeutic target and bring a breakthrough in the treatment.
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Affiliation(s)
- Xu Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, 1095, Wuhan, 430030 China
| | - Zheng-Qian Guo
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, 1095, Wuhan, 430030 China
| | - Dan Cao
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, 1095, Wuhan, 430030 China
| | - Yong Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, 1095, Wuhan, 430030 China
| | - Jian Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Ave, 1095, Wuhan, 430030 China
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23
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Otero-Ramirez ME, Matoba K, Mihara E, Passioura T, Takagi J, Suga H. Macrocyclic peptides that inhibit Wnt signalling via interaction with Wnt3a. RSC Chem Biol 2020; 1:26-34. [PMID: 34458746 PMCID: PMC8382136 DOI: 10.1039/d0cb00016g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 03/13/2020] [Indexed: 12/20/2022] Open
Abstract
Here we report de novo macrocyclic peptide binders to Wnt3a, a member of the Wnt protein family. By means of the Random non-standard Peptides Integrated Discovery (RaPID) system, we have performed in vitro selection against the complex of mouse Wnt3a (mWnt3a) with human afamin (hAFM) to discover macrocyclic peptides that bind mWnt3a with K D values as tight as 110 nM. One of these peptides, WAp-D04 (Wnt-AFM-peptide-D04), was able to inhibit the receptor-mediated signaling process, which was demonstrated in a Wnt3a-dependent reporter cell-line. Based on this initial hit, we applied a block-mutagenesis scanning display to identify a mutant inhibitor, WAp-D04-W10P, with 5-fold greater potency in a reporter assay. This work represents the first instance of molecules capable of inhibiting Wnt signaling through direct interaction with a Wnt protein, a molecular class for which targeting has been challenging due its highly hydrophobic nature.
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Affiliation(s)
- Manuel E Otero-Ramirez
- Department of Chemistry, Graduate School of Science, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Kyoko Matoba
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University 3-2 Yamadaoka Suita-shi Osaka 565-0871 Japan
| | - Emiko Mihara
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University 3-2 Yamadaoka Suita-shi Osaka 565-0871 Japan
| | - Toby Passioura
- Department of Chemistry, Graduate School of Science, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan .,Sydney Analytical, School of Chemistry and School of Life and Environmental Sciences, The University of Sydney Sydney 2006 Australia
| | - Junichi Takagi
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University 3-2 Yamadaoka Suita-shi Osaka 565-0871 Japan
| | - Hiroaki Suga
- Department of Chemistry, Graduate School of Science, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
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24
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DEPDC1 promotes cell proliferation and suppresses sensitivity to chemotherapy in human hepatocellular carcinoma. Biosci Rep 2019; 39:BSR20190946. [PMID: 31189746 PMCID: PMC6620382 DOI: 10.1042/bsr20190946] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/07/2019] [Accepted: 06/12/2019] [Indexed: 12/18/2022] Open
Abstract
Background: Hepatocellular carcinoma (HCC) is one of the major causes of tumor-related morbidity and mortality worldwide. Accumulating evidence has revealed that aberrant expression of crucial cancer-related genes contributes to hepatocellular carcinogenesis. This study aimed to characterize the biological role of DEP domain containing 1 (DEPDC1), a novel cancer-related gene, in HCC and illuminate the potential molecular mechanisms involved. Materials and methods: Quantitative real-time PCR (qRT-PCR), Western blotting and immunohistochemical (IHC) staining were used to characterize the expression patterns of DEPDC1 in tumorous tissues and adjacent normal tissues. Kaplan–Meier survival analysis was launched to evaluate the relationship between DEPDC1 expression and overall survival. CCK8 assay, colony formation and flow cytometry were performed to investigate the effects of DEPDC1 on HCC cell viability, clonogenic capability and cell apoptosis. Murine xenograft models were established to determine the effect of DEPDC1 on tumor growth in vivo. SP600125, a JNK specific inhibitor, was applied to carriy out mechanistic studies. Results: DEPDC1 was significantly up-regulated in HCC tissues compared with para-cancerous tissues. Besides, patients with high DEPDC1 expression experienced a significantly shorter overall survival. Functional investigations demonstrated that DEPDC1 overexpression facilitated HCC cell proliferation and suppressed cell apoptosis, whereas DEPDC1 depletion inhibited cell proliferation and promoted cell apoptosis. Furthermore, DEPDC1 ablation suppressed tumorigenecity of HCC cells in murine xenograft models. Mechanistic studies uncovered that JNK signaling pathway mediated the promoting effects of DEPDC1 on HCC cell viability and chemotherapy resistance. Conclusion: Collectively, our data may provide some evidence for DEPDC1 as a candidate therapeutic target for HCC.
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25
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Harnoš J, Cañizal MCA, Jurásek M, Kumar J, Holler C, Schambony A, Hanáková K, Bernatík O, Zdráhal Z, Gömöryová K, Gybeľ T, Radaszkiewicz TW, Kravec M, Trantírek L, Ryneš J, Dave Z, Fernández-Llamazares AI, Vácha R, Tripsianes K, Hoffmann C, Bryja V. Dishevelled-3 conformation dynamics analyzed by FRET-based biosensors reveals a key role of casein kinase 1. Nat Commun 2019; 10:1804. [PMID: 31000703 PMCID: PMC6472409 DOI: 10.1038/s41467-019-09651-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 03/20/2019] [Indexed: 01/17/2023] Open
Abstract
Dishevelled (DVL) is the key component of the Wnt signaling pathway. Currently, DVL conformational dynamics under native conditions is unknown. To overcome this limitation, we develop the Fluorescein Arsenical Hairpin Binder- (FlAsH-) based FRET in vivo approach to study DVL conformation in living cells. Using this single-cell FRET approach, we demonstrate that (i) Wnt ligands induce open DVL conformation, (ii) DVL variants that are predominantly open, show more even subcellular localization and more efficient membrane recruitment by Frizzled (FZD) and (iii) Casein kinase 1 ɛ (CK1ɛ) has a key regulatory function in DVL conformational dynamics. In silico modeling and in vitro biophysical methods explain how CK1ɛ-specific phosphorylation events control DVL conformations via modulation of the PDZ domain and its interaction with DVL C-terminus. In summary, our study describes an experimental tool for DVL conformational sampling in living cells and elucidates the essential regulatory role of CK1ɛ in DVL conformational dynamics.
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Affiliation(s)
- Jakub Harnoš
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic.,Department of Cell, Developmental & Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Maria Consuelo Alonso Cañizal
- Department of Pharmacology and Toxicology, University of Würzburg, Würzburg, 97078, Germany.,Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Würzburg, 97078, Germany.,Institute for Molecular Cell Biology, CMB-Center for Molecular Biomedicine, University Hospital Jena, Friedrich Schiller University Jena, Jena, 07745, Germany
| | - Miroslav Jurásek
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Jitender Kumar
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic
| | - Cornelia Holler
- Max Planck Institute for the Science of Light, Erlangen, 91058, Germany.,Biology Department, Developmental Biology, Friedrich-Alexander University Erlangen-Nüremberg, Erlangen, 91058, Germany
| | - Alexandra Schambony
- Max Planck Institute for the Science of Light, Erlangen, 91058, Germany.,Biology Department, Developmental Biology, Friedrich-Alexander University Erlangen-Nüremberg, Erlangen, 91058, Germany
| | - Kateřina Hanáková
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Ondřej Bernatík
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Zbyněk Zdráhal
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Kristína Gömöryová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Tomáš Gybeľ
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | | | - Marek Kravec
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Lukáš Trantírek
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic.,Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Brno, 612 65, Czech Republic
| | - Jan Ryneš
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic
| | - Zankruti Dave
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | | | - Robert Vácha
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - Konstantinos Tripsianes
- CEITEC-Central European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic
| | - Carsten Hoffmann
- Department of Pharmacology and Toxicology, University of Würzburg, Würzburg, 97078, Germany.,Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Würzburg, 97078, Germany.,Institute for Molecular Cell Biology, CMB-Center for Molecular Biomedicine, University Hospital Jena, Friedrich Schiller University Jena, Jena, 07745, Germany
| | - Vítězslav Bryja
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic. .,Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Brno, 612 65, Czech Republic.
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26
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Nuti F, Gellini C, Larregola M, Squillantini L, Chelli R, Salvi PR, Lequin O, Pietraperzia G, Papini AM. A Photochromic Azobenzene Peptidomimetic of a β-Turn Model Peptide Structure as a Conformational Switch. Front Chem 2019; 7:180. [PMID: 30984746 PMCID: PMC6449423 DOI: 10.3389/fchem.2019.00180] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/07/2019] [Indexed: 01/09/2023] Open
Abstract
The insertion of azobenzene moiety in complex molecular protein or peptide systems can lead to molecular switches to be used to determine kinetics of folding/unfolding properties of secondary structures, such as α-helix, β-turn, or β-hairpin. In fact, in azobenzene, absorption of light induces a reversible trans ↔ cis isomerization, which in turns generates a strain or a structure relaxation in the chain that causes peptide folding/unfolding. In particular azobenzene may permit reversible conformational control of hairpin formation. In the present work a synthetic photochromic azobenzene amino acid derivative was incorporated as a turn element to modify the synthetic peptide [Pro7,Asn8,Thr10]CSF114 previously designed to fold as a type I β-turn structure in biomimetic HFA/water solution. In particular, the P-N-H fragment at positions 7–9, involved in a β-hairpin, was replaced by an azobenzene amino acid derivative (synthesized ad hoc) to investigate if the electronic properties of the novel peptidomimetic analog could induce variations in the isomerization process. The absorption spectra of the azopeptidomimetic analog of the type I β-turn structure and of the azobenzene amino acid as control were measured as a function of the irradiation time exciting into the respective first ππ* and nπ* transition bands. Isomerization of the azopeptidomimetic results strongly favored by exciting into the ππ* transition. Moreover, conformational changes induced by the cis↔ trans azopeptidomimetic switch were investigated by NMR in different solvents.
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Affiliation(s)
- Francesca Nuti
- Laboratory of Peptide and Protein Chemistry and Biology (PeptLab), Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy
| | - Cristina Gellini
- Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy
| | - Maud Larregola
- PeptLab@UCP Platform and Laboratory of Chemical Biology EA4505, Université Paris-Seine, Cergy-Pontoise, France
| | - Lorenzo Squillantini
- Laboratory of Peptide and Protein Chemistry and Biology (PeptLab), Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy
| | - Riccardo Chelli
- Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy.,European Laboratory for Non-Linear Spectroscopy (LENS), Sesto Fiorentino, Italy
| | - Pier Remigio Salvi
- Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy
| | - Olivier Lequin
- Laboratory of Biomolecules, CNRS, Sorbonne University, Ecole Normale Superieure, PSL University, Paris, France
| | - Giangaetano Pietraperzia
- Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy.,European Laboratory for Non-Linear Spectroscopy (LENS), Sesto Fiorentino, Italy
| | - Anna Maria Papini
- Laboratory of Peptide and Protein Chemistry and Biology (PeptLab), Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Italy.,PeptLab@UCP Platform and Laboratory of Chemical Biology EA4505, Université Paris-Seine, Cergy-Pontoise, France
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27
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Xu Y, Sun W, Zheng B, Liu X, Luo Z, Kong Y, Xu M, Chen Y. DEPDC1B knockdown inhibits the development of malignant melanoma through suppressing cell proliferation and inducing cell apoptosis. Exp Cell Res 2019; 379:48-54. [PMID: 30880030 DOI: 10.1016/j.yexcr.2019.03.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 01/09/2023]
Abstract
Malignant melanoma (MM) remains the leading cause of skin cancer related death, which has very poor prognosis because of locoregional recurrence and distant metastasis. DEPDC1B (DEP domain-containing protein 1B), has been proved to be associated with some types of malignant tumors. However, the role of DEPDC1B in MM is still unknown. In this study, the expression levels of DEPDC1B in MM tissues were detected by IHC. DEPDC1B knockdown cell lines were constructed, evaluated by Western blot and qRT-PCR, and also used for construction of mice xenograft models. Cell proliferation and apoptosis were investigated by MTT, colony formation assay and flow cytometry, respectively. The results indicated significantly up-regulated expression of DEPDC1B in tumor tissues. Moreover, knockdown of DEPDC1B could inhibit cell proliferation while inducing cell apoptosis. The in vivo study demonstrated the significant suppression of tumor growth by knockdown of DEPDC1B. Finally, the results of antibody array proved the up-regulation of pro-apoptotic proteins and the down-regulation of anti-apoptotic proteins by DEPDC1B knockdown. Therefore, it could be concluded that DEPDC1B was involved in the development and progression of MM, which may act as promotor for MM and could be a potential therapeutic target.
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Affiliation(s)
- Yu Xu
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Wei Sun
- Department of Surgery Base, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Biqiang Zheng
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Xin Liu
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Zhiguo Luo
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Yunyi Kong
- Department of Pathology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Midie Xu
- Department of Pathology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Yong Chen
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China.
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28
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Patil DN, Rangarajan ES, Novick SJ, Pascal BD, Kojetin DJ, Griffin PR, Izard T, Martemyanov KA. Structural organization of a major neuronal G protein regulator, the RGS7-Gβ5-R7BP complex. eLife 2018; 7:42150. [PMID: 30540250 PMCID: PMC6310461 DOI: 10.7554/elife.42150] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/12/2018] [Indexed: 01/03/2023] Open
Abstract
Signaling by the G-protein-coupled receptors (GPCRs) plays fundamental role in a vast number of essential physiological functions. Precise control of GPCR signaling requires action of regulators of G protein signaling (RGS) proteins that deactivate heterotrimeric G proteins. RGS proteins are elaborately regulated and comprise multiple domains and subunits, yet structural organization of these assemblies is poorly understood. Here, we report a crystal structure and dynamics analyses of the multisubunit complex of RGS7, a major regulator of neuronal signaling with key roles in controlling a number of drug target GPCRs and links to neuropsychiatric disease, metabolism, and cancer. The crystal structure in combination with molecular dynamics and mass spectrometry analyses reveals unique organizational features of the complex and long-range conformational changes imposed by its constituent subunits during allosteric modulation. Notably, several intermolecular interfaces in the complex work in synergy to provide coordinated modulation of this key GPCR regulator.
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Affiliation(s)
- Dipak N Patil
- Department of Neuroscience, The Scripps Research Institute, Jupiter, United States
| | - Erumbi S Rangarajan
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, United States
| | - Scott J Novick
- Department of Molecular Medicine, The Scripps Research Institute, Jupiter, United States
| | - Bruce D Pascal
- Department of Molecular Medicine, The Scripps Research Institute, Jupiter, United States
| | - Douglas J Kojetin
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, United States
| | - Patrick R Griffin
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, United States.,Department of Molecular Medicine, The Scripps Research Institute, Jupiter, United States
| | - Tina Izard
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, United States
| | - Kirill A Martemyanov
- Department of Neuroscience, The Scripps Research Institute, Jupiter, United States
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29
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Strakova K, Kowalski-Jahn M, Gybel T, Valnohova J, Dhople VM, Harnos J, Bernatik O, Ganji RS, Zdrahal Z, Mulder J, Lindskog C, Bryja V, Schulte G. Dishevelled enables casein kinase 1-mediated phosphorylation of Frizzled 6 required for cell membrane localization. J Biol Chem 2018; 293:18477-18493. [PMID: 30309985 DOI: 10.1074/jbc.ra118.004656] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/05/2018] [Indexed: 11/06/2022] Open
Abstract
Frizzleds (FZDs) are receptors for secreted lipoglycoproteins of the Wingless/Int-1 (WNT) family, initiating an important signal transduction network in multicellular organisms. FZDs are G protein-coupled receptors (GPCRs), which are well known to be regulated by phosphorylation, leading to specific downstream signaling or receptor desensitization. The role and underlying mechanisms of FZD phosphorylation remain largely unexplored. Here, we investigated the phosphorylation of human FZD6 Using MS analysis and a phospho-state- and -site-specific antibody, we found that Ser-648, located in the FZD6 C terminus, is efficiently phosphorylated by casein kinase 1 ϵ (CK1ϵ) and that this phosphorylation requires the scaffolding protein Dishevelled (DVL). In an overexpression system, DVL1, -2, and -3 promoted CK1ϵ-mediated FZD6 phosphorylation on Ser-648. This DVL activity required an intact DEP domain and FZD-mediated recruitment of this domain to the cell membrane. Substitution of the CK1ϵ-targeted phosphomotif reduced FZD6 surface expression, suggesting that Ser-648 phosphorylation controls membrane trafficking of FZD6 Phospho-Ser-648 FZD6 immunoreactivity in human fallopian tube epithelium was predominantly apical, associated with cilia in a subset of epithelial cells, compared with the total FZD6 protein expression, suggesting that FZD6 phosphorylation contributes to asymmetric localization of receptor function within the cell and to epithelial polarity. Given the key role of FZD6 in planar cell polarity, our results raise the possibility that asymmetric phosphorylation of FZD6 rather than asymmetric protein distribution accounts for polarized receptor signaling.
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Affiliation(s)
- Katerina Strakova
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic.,Section for Receptor Biology and Signaling, Department of Physiology and Pharmacology, Karolinska Institutet, Biomedicum (6D), Tomtebodavägen 16, SE-17165 Stockholm, Sweden
| | - Maria Kowalski-Jahn
- Section for Receptor Biology and Signaling, Department of Physiology and Pharmacology, Karolinska Institutet, Biomedicum (6D), Tomtebodavägen 16, SE-17165 Stockholm, Sweden
| | - Tomas Gybel
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Jana Valnohova
- Section for Receptor Biology and Signaling, Department of Physiology and Pharmacology, Karolinska Institutet, Biomedicum (6D), Tomtebodavägen 16, SE-17165 Stockholm, Sweden
| | - Vishnu M Dhople
- Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, Ernst Moritz Arndt University of Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, 17487 Greifswald, Germany
| | - Jakub Harnos
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Ondrej Bernatik
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
| | - Ranjani Sri Ganji
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic.,Central European Institute for Technology, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Zbynek Zdrahal
- Central European Institute for Technology, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Jan Mulder
- Science for Life Laboratory, Department of Neuroscience, Karolinska Institute, Tomtebodavägen 16 17165 Stockholm, Sweden, and
| | - Cecilia Lindskog
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Science for Life Laboratory, Uppsala University, Dag Hammarskjölds väg 20, 751 85 Uppsala, Sweden
| | - Vitezslav Bryja
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic,
| | - Gunnar Schulte
- From the Laboratory of WNT Signaling, Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic, .,Section for Receptor Biology and Signaling, Department of Physiology and Pharmacology, Karolinska Institutet, Biomedicum (6D), Tomtebodavägen 16, SE-17165 Stockholm, Sweden
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30
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Schulte G, Wright SC. Frizzleds as GPCRs - More Conventional Than We Thought! Trends Pharmacol Sci 2018; 39:828-842. [PMID: 30049420 DOI: 10.1016/j.tips.2018.07.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/27/2018] [Accepted: 07/02/2018] [Indexed: 01/14/2023]
Abstract
For more than 30 years, WNT/β-catenin and planar cell polarity signaling has formed the basis for what we understand to be the primary output of the interaction between WNTs and their cognate receptors known as Frizzleds (FZDs). In the shadow of these pathways, evidence for the involvement of heterotrimeric G proteins in WNT signaling has grown substantially over the years - redefining the complexity of the WNT signaling network. Moreover, the distinct characteristics of FZD paralogs are becoming better understood, and we can now apply concepts valid for classical GPCRs to grasp FZDs as molecular machines at the interface of ligand binding and intracellular effects. This review discusses recent developments in the field of WNT/FZD signaling in the context of GPCR pharmacology, and identifies remaining mysteries with an emphasis on structural and kinetic components that support this dogma shift.
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Affiliation(s)
- Gunnar Schulte
- Section of Receptor Biology and Signaling, Department of Physiology and Pharmacology, Biomedicum 6D, Tomtebodavägen 16, Karolinska Institutet, S-171 65 Stockholm, Sweden.
| | - Shane C Wright
- Section of Receptor Biology and Signaling, Department of Physiology and Pharmacology, Biomedicum 6D, Tomtebodavägen 16, Karolinska Institutet, S-171 65 Stockholm, Sweden
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31
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Sharma M, Castro-Piedras I, Simmons GE, Pruitt K. Dishevelled: A masterful conductor of complex Wnt signals. Cell Signal 2018; 47:52-64. [PMID: 29559363 DOI: 10.1016/j.cellsig.2018.03.004] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/14/2018] [Accepted: 03/14/2018] [Indexed: 12/21/2022]
Abstract
The Dishevelled gene was first identified in Drosophila mutants with disoriented hair and bristle polarity [1-3]. The Dsh gene (Dsh/Dvl, in Drosophila and vertebrates respectively) gained popularity when it was discovered that it plays a key role in segment polarity during early embryonic development in Drosophila [4]. Subsequently, the vertebrate homolog of Dishevelled genes were identified in Xenopus (Xdsh), mice (Dvl1, Dvl2, Dvl3), and in humans (DVL1, DVL2, DVL3) [5-10]. Dishevelled functions as a principal component of Wnt signaling pathway and governs several cellular processes including cell proliferation, survival, migration, differentiation, polarity and stem cell renewal. This review will revisit seminal discoveries and also summarize recent advances in characterizing the role of Dishevelled in both normal and pathophysiological settings.
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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
| | - Glenn E Simmons
- Department of Biomedical Sciences, University of Minnesota, School of Medicine, Duluth, MN, USA
| | - Kevin Pruitt
- Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
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32
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Strakova K, Matricon P, Yokota C, Arthofer E, Bernatik O, Rodriguez D, Arenas E, Carlsson J, Bryja V, Schulte G. The tyrosine Y250 2.39 in Frizzled 4 defines a conserved motif important for structural integrity of the receptor and recruitment of Disheveled. Cell Signal 2017; 38:85-96. [DOI: 10.1016/j.cellsig.2017.06.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 06/09/2017] [Accepted: 06/26/2017] [Indexed: 12/16/2022]
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33
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Wald JH, Hatakeyama J, Printsev I, Cuevas A, Fry WH, Saldana MJ, Vorst KV, Rowson-Hodel A, Angelastro JM, Sweeney C, Carraway KL. Suppression of planar cell polarity signaling and migration in glioblastoma by Nrdp1-mediated Dvl polyubiquitination. Oncogene 2017; 36:5158-5167. [PMID: 28481871 PMCID: PMC5589482 DOI: 10.1038/onc.2017.126] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 02/15/2017] [Accepted: 03/23/2017] [Indexed: 12/16/2022]
Abstract
The lethality of the aggressive brain tumor glioblastoma multiforme (GBM) results in part from its strong propensity to invade surrounding normal brain tissue. Although oncogenic drivers such as epidermal growth factor receptor activation and Phosphatase and Tensin homolog inactivation are thought to promote the motility and invasiveness of GBM cells via phosphatidylinostitol 3-kinase activation, other unexplored mechanisms may also contribute to malignancy. Here we demonstrate that several components of the planar cell polarity (PCP) arm of non-canonical Wnt signaling including VANGL1, VANGL2 and FZD7 are transcriptionally upregulated in glioma and correlate with poorer patient outcome. Knockdown of the core PCP pathway component VANGL1 suppresses the motility of GBM cell lines, pointing to an important mechanistic role for this pathway in glioblastoma malignancy. We further observe that restoration of Nrdp1, a RING finger type E3 ubiquitin ligase whose suppression in GBM also correlates with poor prognosis, reduces GBM cell migration and invasiveness by suppressing PCP signaling. Our observations indicate that Nrdp1 physically interacts with the Vangl1 and Vangl2 proteins to mediate the K63-linked polyubiquitination of the Dishevelled, Egl-10 and Pleckstrin (DEP) domain of the Wnt pathway protein Dishevelled (Dvl). Ubiquitination hinders Dvl binding to phosphatidic acid, an interaction necessary for efficient Dvl recruitment to the plasma membrane upon Wnt stimulation of Fzd receptor and for the propagation of downstream signals. We conclude that the PCP pathway contributes significantly to the motility and hence the invasiveness of GBM cells, and that Nrdp1 acts as a negative regulator of PCP signaling by inhibiting Dvl through a novel polyubiquitination mechanism. We propose that the upregulation of core PCP components, together with the loss of the key negative regulator Nrdp1, act coordinately to promote GBM invasiveness and malignancy.
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Affiliation(s)
- Jessica H. Wald
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Jason Hatakeyama
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Ignat Printsev
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Antonio Cuevas
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - William H.D. Fry
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Matthew J. Saldana
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Kacey Vander Vorst
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Ashley Rowson-Hodel
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - James M. Angelastro
- Department of Molecular Biosciences, University of California Davis School of Veterinary Medicine, Davis, CA, USA
| | - Colleen Sweeney
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
| | - Kermit L. Carraway
- Department of Biochemistry and Molecular Medicine, and UC Davis Comprehensive Cancer Center, University of California Davis School of Medicine, Sacramento, CA, USA
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34
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The N-Terminal Part of the Dishevelled DEP Domain Is Required for Wnt/β-Catenin Signaling in Mammalian Cells. Mol Cell Biol 2017; 37:MCB.00145-17. [PMID: 28674183 PMCID: PMC5574038 DOI: 10.1128/mcb.00145-17] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/15/2017] [Indexed: 12/27/2022] Open
Abstract
Dishevelled (DVL) proteins are key mediators of the Wnt/β-catenin signaling pathway. All DVL proteins contain three conserved domains: DIX, PDZ, and DEP. There is a consensus in the field that the DIX domain is critical for Wnt/β-catenin signaling, but contradictory evidence regarding the function of the DEP domain exists. It has been difficult, until recently, to test the importance of the DEP domain rigorously because of the interference with endogenous DVL, expressed in all Wnt-responsive cell lines. In this study, we took advantage of DVL knockout (DVL1/DVL2/DVL3 triple knockout) cells fully deficient in Wnt3a-induced signaling events and performed a series of rescue experiments. Using these complementation assays, we analyzed the role of individual DVL isoforms. Further domain mapping of DVL1 showed that both the DVL1 DEP domain and especially its N-terminal region are required and sufficient for Wnt3a-induced phosphorylation of LRP6 and TopFlash reporter activation. On the contrary, multiple DEP domain mutants deficient in the planar cell polarity (PCP) pathway could fully rescue the Wnt3a response. This study provides conclusive evidence that the DVL DEP domain is essential for Wnt/β-catenin signaling in mammalian cells and establishes an experimental system suitable for further functional testing of DVL.
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35
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Tortelote GG, Reis RR, de Almeida Mendes F, Abreu JG. Complexity of the Wnt/β‑catenin pathway: Searching for an activation model. Cell Signal 2017; 40:30-43. [PMID: 28844868 DOI: 10.1016/j.cellsig.2017.08.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/08/2017] [Accepted: 08/23/2017] [Indexed: 12/13/2022]
Abstract
Wnt signaling refers to a conserved signaling pathway, widely studied due to its roles in cellular communication, cell fate decisions, development and cancer. However, the exact mechanism underlying inhibition of the GSK phosphorylation towards β-catenin and activation of the pathway after biding of Wnt ligand to its cognate receptors at the plasma membrane remains unclear. Wnt target genes are widely spread over several animal phyla. They participate in a plethora of functions during the development of an organism, from axial specification, gastrulation and organogenesis all the way to regeneration and repair in adults. Temporal and spatial oncogenetic re-activation of Wnt signaling almost certainly leads to cancer. Wnt signaling components have been extensively studied as possible targets in anti-cancer therapies. In this review we will discuss one of the most intriguing questions in this field, that is how β-catenin, a major component in this pathway, escapes the destruction complex, gets stabilized in the cytosol and it is translocated to the nucleus where it acts as a co-transcription factor. Four major models have evolved during the past 20years. We dissected each of them along with current views and future perspectives on this pathway. This review will focus on the molecular mechanisms by which Wnt proteins modulate β-catenin cytoplasmic levels and the relevance of this pathway for the development and cancer.
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Affiliation(s)
- Giovane G Tortelote
- Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Renata R Reis
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabio de Almeida Mendes
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jose Garcia Abreu
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
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36
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Membrane Targeting of Disheveled Can Bypass the Need for Arrow/LRP5. Sci Rep 2017; 7:6934. [PMID: 28761148 PMCID: PMC5537288 DOI: 10.1038/s41598-017-04414-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/15/2017] [Indexed: 12/03/2022] Open
Abstract
The highly conserved Wnt signaling pathway regulates cell proliferation and differentiation in vertebrates and invertebrates. Upon binding of a Wnt ligand to a receptor of the Fz family, Disheveled (Dsh/Dvl) transduces the signal during canonical and non-canonical Wnt signaling. The specific details of how this process occurs have proven difficult to study, especially as Dsh appears to function as a switch between different branches of Wnt signaling. Here we focus on the membrane-proximal events that occur once Dsh is recruited to the membrane. We show that membrane-tethering of the Dsh protein is sufficient to induce canonical Wnt signaling activation even in the absence of the Wnt co-receptor Arrow/LRP5/6. We map the protein domains required for pathway activation in membrane tethered constructs finding that both the DEP and PDZ domains are dispensable for canonical signaling only in membrane-tethered Dsh, but not in untethered/normal Dsh. These data lead to a signal activation model, where Arrow is required to localize Dsh to the membrane during canonical Wnt signaling placing Dsh downstream of Arrow.
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37
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Agostino M, Pohl SÖG, Dharmarajan A. Structure-based prediction of Wnt binding affinities for Frizzled-type cysteine-rich domains. J Biol Chem 2017; 292:11218-11229. [PMID: 28533339 DOI: 10.1074/jbc.m117.786269] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/09/2017] [Indexed: 11/06/2022] Open
Abstract
Wnt signaling pathways are of significant interest in development and oncogenesis. The first step in these pathways typically involves the binding of a Wnt protein to the cysteine-rich domain (CRD) of a Frizzled receptor. Wnt-Frizzled interactions can be antagonized by secreted Frizzled-related proteins (SFRPs), which also contain a Frizzled-like CRD. The large number of Wnts, Frizzleds, and SFRPs, as well as the hydrophobic nature of Wnt, poses challenges to laboratory-based investigations of interactions involving Wnt. Here, utilizing structural knowledge of a representative Wnt-Frizzled CRD interaction, as well as experimentally determined binding affinities for a selection of Wnt-Frizzled CRD interactions, we generated homology models of Wnt-Frizzled CRD interactions and developed a quantitative structure-activity relationship for predicting their binding affinities. The derived model incorporates a small selection of terms derived from scoring functions used in protein-protein docking, as well as an energetic term considering the contribution made by the lipid of Wnt to the Wnt-Frizzled binding affinity. Validation with an external test set suggests that the model can accurately predict binding affinity for 75% of cases and that the error associated with the predictions is comparable with the experimental error. The model was applied to predict the binding affinities of the full range of mouse and human Wnt-Frizzled and Wnt-SFRP interactions, indicating trends in Wnt binding affinity for Frizzled and SFRP CRDs. The comprehensive predictions made in this study provide the basis for laboratory-based studies of previously unexplored Wnt-Frizzled and Wnt-SFRP interactions, which, in turn, may reveal further Wnt signaling pathways.
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Affiliation(s)
- Mark Agostino
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and .,Curtin Institute of Computation, Curtin University, Kent Street, Bentley, Western Australia 6102, Australia
| | - Sebastian Öther-Gee Pohl
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and
| | - Arun Dharmarajan
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and
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38
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Patel S. Pathogenicity-associated protein domains: The fiercely-conserved evolutionary signatures. GENE REPORTS 2017; 7:127-141. [PMID: 32363241 PMCID: PMC7185390 DOI: 10.1016/j.genrep.2017.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 03/29/2017] [Accepted: 04/07/2017] [Indexed: 12/15/2022]
Abstract
Proteins have highly conserved domains that determine their functionality. Out of the thousands of domains discovered so far across all living forms, some of the predominant clinically-relevant domains include IENR1, HNHc, HELICc, Pro-kuma_activ, Tryp_SPc, Lactamase_B, PbH1, ChtBD3, CBM49, acidPPc, G3P_acyltransf, RPOL8c, KbaA, HAMP, HisKA, Hr1, Dak2, APC2, Citrate_ly_lig, DALR, VKc, YARHG, WR1, PWI, ZnF_BED, TUDOR, MHC_II_beta, Integrin_B_tail, Excalibur, DISIN, Cadherin, ACTIN, PROF, Robl_LC7, MIT, Kelch, GAS2, B41, Cyclin_C, Connexin_CCC, OmpH, Bac_rhodopsin, AAA, Knot1, NH, Galanin, IB, Elicitin, ACTH, Cache_2, CHASE, AgrB, PRP, IGR, and Antimicrobial21. These domains are distributed in nucleases/helicases, proteases, esterases, lipases, glycosylase, GTPases, phosphatases, methyltransferases, acyltransferase, acetyltransferase, polymerase, kinase, ligase, synthetase, oxidoreductase, protease inhibitors, nucleic acid binding proteins, adhesion and immunity-related proteins, cytoskeletal component-manipulating proteins, lipid biosynthesis and metabolism proteins, membrane-associated proteins, hormone-like and signaling proteins, etc. These domains are ubiquitous stretches or folds of the proteins in pathogens and allergens. Pathogenesis alleviation efforts can benefit enormously if the characteristics of these domains are known. Hence, this review catalogs and discusses the role of such pivotal domains, suggesting hypotheses for better understanding of pathogenesis at molecular level. Proteins have highly conserved regions or domains across pathogens and allergens. Knowledge on these critical domains can facilitate our understanding of pathogenesis mechanisms. Such immune manipulation-related domains include IENR1, HNHc, HELICc, ACTIN, PROF, Robl_LC7, OmpH etc. These domains are presnt in enzyme, transcription regulators, adhesion proteins, and hormones. This review discusses and hypothesizes on these domains.
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Key Words
- CARDs, caspase activation and recruitment domains
- CBM, carbohydrate binding module
- CTD, C-terminal domain
- ChtBD, chitin-binding domain
- Diversification
- HNHc, homing endonucleases
- HTH, helix-turn-helix
- IENR1, intron-encoded endonuclease repeat
- Immune manipulation
- PAMPs, pathogen associated molecular patterns
- Pathogenesis
- Phylogenetic conservation
- Protein domains
- SMART, Simple Modular Architecture Research Tool
- Shuffling
- UDG, uracil DNA glycosylase
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Affiliation(s)
- Seema Patel
- Bioinformatics and Medical Informatics Research Center, San Diego State University, San Diego 92182, USA
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39
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Qi J, Lee HJ, Saquet A, Cheng XN, Shao M, Zheng JJ, Shi DL. Autoinhibition of Dishevelled protein regulated by its extreme C terminus plays a distinct role in Wnt/β-catenin and Wnt/planar cell polarity (PCP) signaling pathways. J Biol Chem 2017; 292:5898-5908. [PMID: 28223363 DOI: 10.1074/jbc.m116.772509] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/19/2017] [Indexed: 12/20/2022] Open
Abstract
Dishevelled (Dvl) is a key intracellular signaling molecule that mediates the activation of divergent Wnt pathways. It contains three highly conserved domains known as DIX, PDZ, and DEP, the functions of which have been well characterized in β-catenin-dependent canonical and β-catenin-independent noncanonical Wnt signaling. The C-terminal region is also highly conserved from invertebrates to vertebrates. However, its function in regulating the activation of different Wnt signals remains unclear. We reported previously that Dvl conformational change triggered by the highly conserved PDZ-binding C terminus is important for the pathway specificity. Here we provide further evidence demonstrating that binding of the C terminus to the PDZ domain results in Dvl autoinhibition in the Wnt signaling pathways. Therefore, the forced binding of the C terminus to the PDZ domain reduces the activity of Dvl in noncanonical Wnt signaling, whereas obstruction of this interaction releases Dvl autoinhibition, impairs its functional interaction with LRP6 in canonical Wnt signaling, and increases its specificity in noncanonical Wnt signaling, which is closely correlated with an enhanced Dvl membrane localization. Our findings highlight the importance of the C terminus in keeping Dvl in an appropriate autoinhibited state, accessible for regulation by other partners to switch pathway specificity. Particularly, the C-terminally tagged Dvl fusion proteins that have been widely used to study the function and cellular localization of Dvl may not truly represent the wild-type Dvl because those proteins cannot be autoinhibited.
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Affiliation(s)
- Jing Qi
- From the School of Life Sciences, Shandong University, 27 Shanda Nan Road, Jinan 250100, China.,the Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan 250100, China, and
| | - Ho-Jin Lee
- the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678
| | - Audrey Saquet
- the Institut de Biologie Paris-Seine (IBPS)-Developmental Biology Laboratory, Sorbonne Universités-Université Pierre et Marie Curie (UPMC), University of Paris 06, CNRS UMR7622, 75005 Paris, France
| | - Xiao-Ning Cheng
- From the School of Life Sciences, Shandong University, 27 Shanda Nan Road, Jinan 250100, China
| | - Ming Shao
- From the School of Life Sciences, Shandong University, 27 Shanda Nan Road, Jinan 250100, China
| | - Jie J Zheng
- the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, .,the Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095.,the Molecular Biology Institute, UCLA, Los Angeles, California 90095
| | - De-Li Shi
- From the School of Life Sciences, Shandong University, 27 Shanda Nan Road, Jinan 250100, China, .,the Institut de Biologie Paris-Seine (IBPS)-Developmental Biology Laboratory, Sorbonne Universités-Université Pierre et Marie Curie (UPMC), University of Paris 06, CNRS UMR7622, 75005 Paris, France
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40
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Identification of DEP domain-containing proteins by a machine learning method and experimental analysis of their expression in human HCC tissues. Sci Rep 2016; 6:39655. [PMID: 28000796 PMCID: PMC5175133 DOI: 10.1038/srep39655] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 11/24/2016] [Indexed: 12/23/2022] Open
Abstract
The Dishevelled/EGL-10/Pleckstrin (DEP) domain-containing (DEPDC) proteins have seven members. However, whether this superfamily can be distinguished from other proteins based only on the amino acid sequences, remains unknown. Here, we describe a computational method to segregate DEPDCs and non-DEPDCs. First, we examined the Pfam numbers of the known DEPDCs and used the longest sequences for each Pfam to construct a phylogenetic tree. Subsequently, we extracted 188-dimensional (188D) and 20D features of DEPDCs and non-DEPDCs and classified them with random forest classifier. We also mined the motifs of human DEPDCs to find the related domains. Finally, we designed experimental verification methods of human DEPDC expression at the mRNA level in hepatocellular carcinoma (HCC) and adjacent normal tissues. The phylogenetic analysis showed that the DEPDCs superfamily can be divided into three clusters. Moreover, the 188D and 20D features can both be used to effectively distinguish the two protein types. Motif analysis revealed that the DEP and RhoGAP domain was common in human DEPDCs, human HCC and the adjacent tissues that widely expressed DEPDCs. However, their regulation was not identical. In conclusion, we successfully constructed a binary classifier for DEPDCs and experimentally verified their expression in human HCC tissues.
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41
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Lee I, Choi S, Yun JH, Seo SH, Choi S, Choi KY, Lee W. Crystal structure of the PDZ domain of mouse Dishevelled 1 and its interaction with CXXC5. Biochem Biophys Res Commun 2016; 485:584-590. [PMID: 27932247 DOI: 10.1016/j.bbrc.2016.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 12/03/2016] [Indexed: 11/29/2022]
Abstract
Dishevelled (Dvl) plays a crucial role in Wnt signaling by interacting with membrane-bound receptors and downstream molecules through its PDZ domain. CXXC5 is one of the key molecules that interacts with Dvl and negatively regulates the Wnt/β-catenin pathway in osteoblast differentiation. Recently, the Dvl-CXXC5 interaction has been identified as an excellent target for osteoporosis treatment. Therefore, it is desirable to have detailed structural information for the Dvl-CXXC5 interaction. Although solution structures of the Dvl1 PDZ domain have been reported, a high-resolution crystal structure would provide detailed sidechain information that is essential for drug development. Here, we determined the first crystal structure of the Dvl-1 PDZ domain at a resolution of 1.76 Å, and compared it with its previously reported solution structure. The Dvl1 PDZ domain crystal belonged to the space group H32 with unit-cell parameters a = b = 72.837, c = 120.616, α = β = 90.00, γ = 120.00. The crystal structure of Dvl1 PDZ shared its topology with the previously reported structure determined by nuclear magnetic resonance (NMR); however, the crystal structure was quite different from the solution structure in both the secondary structural region and the ligand-binding pocket. Molecular modeling based on NMR and X-ray crystallographic data yielded detailed information about the Dvl1/CXXC5 interaction, which will be useful for designing inhibitors.
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Affiliation(s)
- Inhwan Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-740, South Korea
| | - Sooho Choi
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-740, South Korea
| | - Ji-Hye Yun
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-740, South Korea
| | - Seol Hwa Seo
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, South Korea; Translational Research Center for Protein Function Control, Yonsei University, Seoul 120-749, South Korea
| | - Sehee Choi
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, South Korea; Translational Research Center for Protein Function Control, Yonsei University, Seoul 120-749, South Korea
| | - Kang-Yell Choi
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, South Korea; Translational Research Center for Protein Function Control, Yonsei University, Seoul 120-749, South Korea
| | - Weontae Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-740, South Korea.
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42
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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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43
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Lee HJ, Bao J, Miller A, Zhang C, Wu J, Baday YC, Guibao C, Li L, Wu D, Zheng JJ. Structure-based Discovery of Novel Small Molecule Wnt Signaling Inhibitors by Targeting the Cysteine-rich Domain of Frizzled. J Biol Chem 2015; 290:30596-606. [PMID: 26504084 PMCID: PMC4683279 DOI: 10.1074/jbc.m115.673202] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Indexed: 01/14/2023] Open
Abstract
Frizzled is the earliest discovered glycosylated Wnt protein receptor and is critical for the initiation of Wnt signaling. Antagonizing Frizzled is effective in inhibiting the growth of multiple tumor types. The extracellular N terminus of Frizzled contains a conserved cysteine-rich domain that directly interacts with Wnt ligands. Structure-based virtual screening and cell-based assays were used to identify five small molecules that can inhibit canonical Wnt signaling and have low IC50 values in the micromolar range. NMR experiments confirmed that these compounds specifically bind to the Wnt binding site on the Frizzled8 cysteine-rich domain with submicromolar dissociation constants. Our study confirms the feasibility of targeting the Frizzled cysteine-rich domain as an effective way of regulating canonical Wnt signaling. These small molecules can be further optimized into more potent therapeutic agents for regulating abnormal Wnt signaling by targeting Frizzled.
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Affiliation(s)
- Ho-Jin Lee
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Ju Bao
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Ami Miller
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Chi Zhang
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, the Department of Ophthalmology, Stein Eye Institute, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095
| | - Jibo Wu
- the State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China, and the Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Yiressy C Baday
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Cristina Guibao
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Lin Li
- the State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China, and
| | - Dianqing Wu
- the Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Jie J Zheng
- From the Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, the Department of Ophthalmology, Stein Eye Institute, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095,
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44
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Dishevelled promotes Wnt receptor degradation through recruitment of ZNRF3/RNF43 E3 ubiquitin ligases. Mol Cell 2015; 58:522-33. [PMID: 25891077 DOI: 10.1016/j.molcel.2015.03.015] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 01/26/2015] [Accepted: 03/11/2015] [Indexed: 12/31/2022]
Abstract
Tumor suppressors ZNRF3 and RNF43 inhibit Wnt signaling through promoting degradation of Wnt coreceptors Frizzled (FZD) and LRP6, and this activity is counteracted by stem cell growth factor R-spondin. The mechanism by which ZNRF3 and RNF43 recognize Wnt receptors remains unclear. Here we uncover an unexpected role of Dishevelled (DVL), a positive Wnt regulator, in promoting Wnt receptor degradation. DVL knockout cells have significantly increased cell surface levels of FZD and LRP6. DVL is required for ZNRF3/RNF43-mediated ubiquitination and degradation of FZD. Physical interaction with DVL is essential for the Wnt inhibitory activity of ZNRF3/RNF43. Binding of FZD through the DEP domain of DVL is required for DVL-mediated downregulation of FZD. Fusion of the DEP domain to ZNRF3/RNF43 overcomes their DVL dependency to downregulate FZD. Our study reveals DVL as a dual function adaptor to recruit negative regulators ZNRF3/RNF43 to Wnt receptors to ensure proper control of pathway activity.
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Pharmacological folding chaperones act as allosteric ligands of Frizzled4. Nat Chem Biol 2015; 11:280-6. [DOI: 10.1038/nchembio.1770] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 02/10/2015] [Indexed: 02/01/2023]
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Gurling M, Talavera K, Garriga G. The DEP domain-containing protein TOE-2 promotes apoptosis in the Q lineage of C. elegans through two distinct mechanisms. Development 2014; 141:2724-34. [PMID: 24961802 DOI: 10.1242/dev.110486] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Neuroblast divisions in the nematode Caenorhabditis elegans often give rise to a larger neuron and a smaller cell that dies. We have previously identified genes that, when mutated, result in neuroblast divisions that generate daughter cells that are more equivalent in size. This effect correlates with the survival of daughter cells that would normally die. We now describe a role for the DEP domain-containing protein TOE-2 in promoting the apoptotic fate in the Q lineage. TOE-2 localized at the plasma membrane and accumulated in the cleavage furrow of the Q.a and Q.p neuroblasts, suggesting that TOE-2 might position the cleavage furrow asymmetrically to generate daughter cells of different sizes. This appears to be the case for Q.a divisions where loss of TOE-2 led to a more symmetric division and to survival of the smaller Q.a daughter. Localization of TOE-2 to the membrane is required for this asymmetry, but, surprisingly, the DEP domain is dispensable. By contrast, loss of TOE-2 led to loss of the apoptotic fate in the smaller Q.p daughter but did not affect the size asymmetry of the Q.p daughters. This function of TOE-2 required the DEP domain but not localization to the membrane. We propose that TOE-2 ensures an apoptotic fate for the small Q.a daughter by promoting asymmetry in the daughter cell sizes of the Q.a neuroblast division but by a mechanism that is independent of cell size in the Q.p division.
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Affiliation(s)
- Mark Gurling
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Karla Talavera
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Gian Garriga
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
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Su YF, Liang CY, Huang CY, Peng CY, Chen CC, Lin MC, Lin RK, Lin WW, Chou MY, Liao PH, Yang JJ. A putative novel protein, DEPDC1B, is overexpressed in oral cancer patients, and enhanced anchorage-independent growth in oral cancer cells that is mediated by Rac1 and ERK. J Biomed Sci 2014; 21:67. [PMID: 25091805 PMCID: PMC4237807 DOI: 10.1186/s12929-014-0067-1] [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] [Received: 03/26/2014] [Accepted: 07/13/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The DEP domain is a globular domain containing approximately 90 amino acids, which was first discovered in 3 proteins: Drosophila disheveled, Caenorhabditis elegans EGL-10, and mammalian Pleckstrin; hence the term, DEP. DEPDC1B is categorized as a potential Rho GTPase-activating protein. The function of the DEP domain in signal transduction pathways is not fully understood. The DEPDC1B protein exhibits the characteristic features of a signaling protein, and contains 2 conserved domains (DEP and RhoGAP) that are involved in Rho GTPase signaling. Small GTPases, such as Rac, CDC42, and Rho, regulate a multitude of cell events, including cell motility, growth, differentiation, cytoskeletal reorganization and cell cycle progression. RESULTS In this study, we found that it was a guanine nucleotide exchange factor and induced both cell migration in a cultured embryonic fibroblast cell line and cell invasion in cancer cell lines; moreover, it was observed to promote anchorage-independent growth in oral cancer cells. We also demonstrated that DEPDC1B plays a role in regulating Rac1 translocated onto cell membranes, suggesting that DEPDC1B exerts a biological function by regulating Rac1. We examined oral cancer tissue; 6 out of 7 oral cancer tissue test samples overexpressed DEPDC1B proteins, compared with normal adjacent tissue. CONCLUSIONS DEPDC1B was a guanine nucleotide exchange factor and induced both cell migration in a cultured embryonic fibroblast cell line and cell invasion in cancer cell lines; moreover, it was observed to promote anchorage-independent growth in oral cancer cells. We also demonstrated that DEPDC1B exerts a biological function by regulating Rac1. We found that oral cancer samples overexpressed DEPDC1B proteins, compared with normal adjacent tissue. Suggest that DEPDC1B plays a role in the development of oral cancer. We revealed that proliferation was linked to a novel DEPDC1B-Rac1-ERK1/2 signaling axis in oral cancer cell lines.
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Sheng R, Kim H, Lee H, Xin Y, Chen Y, Tian W, Cui Y, Choi JC, Doh J, Han JK, Cho W. Cholesterol selectively activates canonical Wnt signalling over non-canonical Wnt signalling. Nat Commun 2014; 5:4393. [PMID: 25024088 PMCID: PMC4100210 DOI: 10.1038/ncomms5393] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 06/13/2014] [Indexed: 12/19/2022] Open
Abstract
Wnt proteins control diverse biological processes through β-catenin-dependent canonical signalling and β-catenin-independent non-canonical signalling. The mechanisms by which these signalling pathways are differentially triggered and controlled are not fully understood. Dishevelled (Dvl) is a scaffold protein that serves as the branch point of these pathways. Here, we show that cholesterol selectively activates canonical Wnt signalling over non-canonical signalling under physiological conditions by specifically facilitating the membrane recruitment of the PDZ domain of Dvl and its interaction with other proteins. Single-molecule imaging analysis shows that cholesterol is enriched around the Wnt-activated Frizzled and low-density lipoprotein receptor-related protein 5/6 receptors and plays an essential role for Dvl-mediated formation and maintenance of the canonical Wnt signalling complex. Collectively, our results suggest a new regulatory role of cholesterol in Wnt signalling and a potential link between cellular cholesterol levels and the balance between canonical and non-canonical Wnt signalling activities.
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Affiliation(s)
- Ren Sheng
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | | | | | - Yao Xin
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Yong Chen
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Wen Tian
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Yang Cui
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Jong-Cheol Choi
- Mechanical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | - Junsang Doh
- Mechanical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
| | | | - Wonhwa Cho
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
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A disorder-to-order structural transition in the COOH-tail of Fz4 determines misfolding of the L501fsX533-Fz4 mutant. Sci Rep 2014; 3:2659. [PMID: 24036468 PMCID: PMC3773625 DOI: 10.1038/srep02659] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 08/20/2013] [Indexed: 11/08/2022] Open
Abstract
Frizzled 4 belongs to the superfamily of G protein coupled receptors. The unstructured cytosolic tail of the receptor is essential for its activity. The mutation L501fsX533 in the fz4 gene results in a new COOH-tail of the receptor and causes a form of Familial exudative vitreoretinopathy. Here we show that the mutated tail is structured. Two amphipathic helices, displaying affinity for membranes and resembling the structure of Influenza Hemagglutinin fusion peptide, constitute the new fold. This tail induces the aggregation of the receptor in the Endoplasmic Reticulum and it is sufficient to block the export to the Golgi of a chimeric VSVG protein containing the mutated tail. Affecting the tail's structure, net charge or amphipathicity relocates the mutated Fz4 receptor to the Plasma Membrane. Such disorder-to-order structural transition was never described in GPCRs and opens a new scenario on the possible effect of mutations on unstructured regions of proteins.
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Abstract
The Dishevelled, EGL-10 and pleckstrin (DEP) domain is a globular protein domain that is present in about ten human protein families with well-defined structural features. A picture is emerging that DEP domains mainly function in the spatial and temporal control of diverse signal transduction events by recruiting proteins to the plasma membrane. DEP domains can interact with various partners at the membrane, including phospholipids and membrane receptors, and their binding is subject to regulation.
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