1
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Tsukiyama T. New insights in ubiquitin-dependent Wnt receptor regulation in tumorigenesis. In Vitro Cell Dev Biol Anim 2024; 60:449-465. [PMID: 38383910 PMCID: PMC11126518 DOI: 10.1007/s11626-024-00855-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/17/2024] [Indexed: 02/23/2024]
Abstract
Wnt signaling plays a crucial role in embryonic development and homeostasis maintenance. Delicate and sensitive fine-tuning of Wnt signaling based on the proper timings and positions is required to balance cell proliferation and differentiation and maintain individual health. Therefore, homeostasis is broken by tissue hypoplasia or tumor formation once Wnt signal dysregulation disturbs the balance of cell proliferation. The well-known regulatory mechanism of Wnt signaling is the molecular reaction associated with the cytoplasmic accumulation of effector β-catenin. In addition to β-catenin, most Wnt effector proteins are also regulated by ubiquitin-dependent modification, both qualitatively and quantitatively. This review will explain the regulation of the whole Wnt signal in four regulatory phases, as well as the different ubiquitin ligases and the function of deubiquitinating enzymes in each phase. Along with the recent results, the mechanism by which RNF43 negatively regulates the surface expression of Wnt receptors, which has recently been well understood, will be detailed. Many RNF43 mutations have been identified in pancreatic and gastrointestinal cancers and examined for their functional alteration in Wnt signaling. Several mutations facilitate or activate the Wnt signal, reversing the RNF43 tumor suppressor function into an oncogene. RNF43 may simultaneously play different roles in classical multistep tumorigenesis, as both wild-type and mutant RNF43 suppress the p53 pathway. We hope that the knowledge obtained from further research in RNF43 will be applied to cancer treatment in the future despite the fully unclear function of RNF43.
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Affiliation(s)
- Tadasuke Tsukiyama
- Department of Biochemistry, Graduate School of Medicine, Hokkaido University, 15NW7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan.
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2
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Liu HY, Sun XJ, Xiu SY, Zhang XY, Wang ZQ, Gu YL, Yi CX, Liu JY, Dai YS, Yuan X, Liao HP, Liu ZM, Pang XC, Li TC. Frizzled receptors (FZDs) in Wnt signaling: potential therapeutic targets for human cancers. Acta Pharmacol Sin 2024:10.1038/s41401-024-01270-3. [PMID: 38632318 DOI: 10.1038/s41401-024-01270-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 03/24/2024] [Indexed: 04/19/2024] Open
Abstract
Frizzled receptors (FZDs) are key contributors intrinsic to the Wnt signaling pathway, activation of FZDs triggering the Wnt signaling cascade is frequently observed in human tumors and intimately associated with an aggressive carcinoma phenotype. It has been shown that the abnormal expression of FZD receptors contributes to the manifestation of malignant characteristics in human tumors such as enhanced cell proliferation, metastasis, chemotherapy resistance as well as the acquisition of cancer stemness. Given the essential roles of FZD receptors in the Wnt signaling in human tumors, this review aims to consolidate the prevailing knowledge on the specific status of FZD receptors (FZD1-10) and elucidate their respective functions in tumor progression. Furthermore, we delineate the structural basis for binding of FZD and its co-receptors to Wnt, and provide a better theoretical foundation for subsequent studies on related mechanisms. Finally, we describe the existing biological classes of small molecule-based FZD inhibitors in detail in the hope that they can provide useful assistance for design and development of novel drug candidates targeted FZDs.
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Affiliation(s)
- Hui-Yu Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Xiao-Jiao Sun
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Si-Yu Xiu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Xiang-Yu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Zhi-Qi Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Yan-Lun Gu
- Department of Pharmacy, Peking University First Hospital, Beijing, 100034, China
| | - Chu-Xiao Yi
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Jun-Yan Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Yu-Song Dai
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, 100034, China
| | - Xia Yuan
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Hua-Peng Liao
- Yizhang County People's Hospital, Chenzhou, 424200, China
| | - Zhen-Ming Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China.
| | - Xiao-Cong Pang
- Department of Pharmacy, Peking University First Hospital, Beijing, 100034, China.
| | - Tian-Cheng Li
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing, 100034, China.
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100034, China.
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3
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Cesarato N, Schwieger-Briel A, Gossmann Y, Henne SK, Hillmann K, Frommherz LH, Wehner M, Xiong X, Thiele H, Oji V, Milani D, Tantcheva-Poor I, Giehl K, Fölster-Holst R, Teichler A, Braeckmans D, Hoeger PH, Jones G, Frank J, Weibel L, Blume-Peytavi U, Hamm H, Nöthen MM, Geyer M, Heilmann-Heimbach S, Basmanav FB, Betz RC. Short anagen hair syndrome: association with mono- and biallelic variants in WNT10A and a genetic overlap with male pattern hair loss. Br J Dermatol 2023; 189:741-749. [PMID: 37671665 DOI: 10.1093/bjd/ljad314] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/08/2023] [Accepted: 08/23/2023] [Indexed: 09/07/2023]
Abstract
BACKGROUND Short anagen hair (SAH) is a rare paediatric hair disorder characterized by a short anagen phase, an inability to grow long scalp hair and a negative psychological impact. The genetic basis of SAH is currently unknown. OBJECTIVES To perform molecular genetic investigations in 48 individuals with a clinical phenotype suggestive of SAH to identify, if any, the genetic basis of this condition. METHODS Exome sequencing was performed in 27 patients diagnosed with SAH or with a complaint of short, nongrowing hair. The cohort was screened for variants with a minor allele frequency (MAF) < 5% in the general population and a Combined Annotation Dependent Depletion (CADD) score > 15, to identify genes whose variants were enriched in this cohort. Sanger sequencing was used for variant validation and screening of 21 additional individuals with the same clinical diagnosis and their relatives. Genetic association testing of SAH-related variants for male pattern hair loss (MPHL) was performed using UK Biobank data. RESULTS Analyses revealed that 20 individuals (42%) carried mono- or biallelic pathogenic variants in WNT10A. Rare WNT10A variants are associated with a phenotypic spectrum ranging from no clinical signs to severe ectodermal dysplasia. A significant association was found between WNT10A and SAH, and this was mostly observed in individuals with light-coloured hair and regression of the frontoparietal hairline. Notably, the most frequent variant in the cohort [c.682T>A;p.(Phe228Ile)] was in linkage disequilibrium with four common WNT10A variants, all of which have a known association with MPHL. Using UK Biobank data, our analyses showed that c.682T>A;p.(Phe228Ile) and one other variant identified in the SAH cohort are also associated with MPHL, and partially explain the known associations between WNT10A and MPHL. CONCLUSIONS Our results suggest that WNT10A is associated with SAH and that SAH has a genetic overlap with the common phenotype MPHL. The presumed shared biologic effect of WNT10A variants in SAH and MPHL is a shortening of the anagen phase. Other factors, such as modifier genes and sex, may also play a role in the clinical manifestation of hair phenotypes associated with the WNT10A locus.
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Affiliation(s)
| | - Agnes Schwieger-Briel
- Department of Pediatric Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | | | | | - Kathrin Hillmann
- Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Leonie H Frommherz
- Department of Dermatology and Allergy, Ludwig-Maximilian-University of Munich, Munich, Germany
| | | | | | - Holger Thiele
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Vinzenz Oji
- Department of Dermatology, University Hospital of Muenster, Muenster, Germany
| | - Donatella Milani
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Iliana Tantcheva-Poor
- Department of Dermatology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Kathrin Giehl
- Department of Dermatology and Allergy, Ludwig-Maximilian-University of Munich, Munich, Germany
| | - Regina Fölster-Holst
- Department of Dermatology, Venereology and Allergology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Anne Teichler
- Department of Paediatric Dermatology, Catholic Children's Hospital Wilhelmstift, Hamburg, Germany
| | - Delphine Braeckmans
- Department of Paediatric Dermatology, Catholic Children's Hospital Wilhelmstift, Hamburg, Germany
| | - Peter H Hoeger
- Department of Paediatric Dermatology, Catholic Children's Hospital Wilhelmstift, Hamburg, Germany
| | - Gabriela Jones
- Clinical Genetics Department, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Jorge Frank
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - Lisa Weibel
- Department of Pediatric Dermatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - Ulrike Blume-Peytavi
- Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Henning Hamm
- Department of Dermatology, Venereology, and Allergology, University Hospital Würzburg, Würzburg, Germany
| | | | - Matthias Geyer
- Institute of Structural Biology, University of Bonn, Medical Faculty and University Hospital Bonn, Bonn, Germany
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Qi X, Hu Q, Elghobashi-Meinhardt N, Long T, Chen H, Li X. Molecular basis of Wnt biogenesis, secretion, and Wnt7-specific signaling. Cell 2023; 186:5028-5040.e14. [PMID: 37852257 PMCID: PMC10841698 DOI: 10.1016/j.cell.2023.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 09/04/2023] [Accepted: 09/21/2023] [Indexed: 10/20/2023]
Abstract
Wnt proteins are enzymatically lipidated by Porcupine (PORCN) in the ER and bind to Wntless (WLS) for intracellular transport and secretion. Mechanisms governing the transfer of these low-solubility Wnts from the ER to the extracellular space remain unclear. Through structural and functional analyses of Wnt7a, a crucial Wnt involved in central nervous system angiogenesis and blood-brain barrier maintenance, we have elucidated the principles of Wnt biogenesis and Wnt7-specific signaling. The Wnt7a-WLS complex binds to calreticulin (CALR), revealing that CALR functions as a chaperone to facilitate Wnt transfer from PORCN to WLS during Wnt biogenesis. Our structures, functional analyses, and molecular dynamics simulations demonstrate that a phospholipid in the core of Wnt-bound WLS regulates the association and dissociation between Wnt and WLS, suggesting a lipid-mediated Wnt secretion mechanism. Finally, the structure of Wnt7a bound to RECK, a cell-surface Wnt7 co-receptor, reveals how RECKCC4 engages the N-terminal domain of Wnt7a to activate Wnt7-specific signaling.
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Affiliation(s)
- Xiaofeng Qi
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Qinli Hu
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | | | - Tao Long
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hongwen Chen
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Xiaochun Li
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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5
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Progress of Wnt Signaling Pathway in Osteoporosis. Biomolecules 2023; 13:biom13030483. [PMID: 36979418 PMCID: PMC10046187 DOI: 10.3390/biom13030483] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023] Open
Abstract
Osteoporosis, one of the serious health diseases, involves bone mass loss, bone density diminishing, and degeneration of bone microstructure, which is accompanied by a tendency toward bone fragility and a predisposition to fracture. More than 200 million people worldwide suffer from osteoporosis, and the cost of treating osteoporotic fractures is expected to reach at least $25 billion by 2025. The generation and development of osteoporosis are regulated by genetic factors and regulatory factors such as TGF-β, BMP, and FGF through multiple pathways, including the Wnt signaling pathway, the Notch signaling pathway, and the MAPK signaling pathway. Among them, the Wnt signaling pathway is one of the most important pathways. It is not only involved in bone development and metabolism but also in the differentiation and proliferation of chondrocytes, mesenchymal stem cells, osteoclasts, and osteoblasts. Dkk-1 and SOST are Wnt inhibitory proteins that can inhibit the activation of the canonical Wnt signaling pathway and block the proliferation and differentiation of osteoblasts. Therefore, they may serve as potential targets for the treatment of osteoporosis. In this review, we analyzed the mechanisms of Wnt proteins, β-catenin, and signaling molecules in the process of signal transduction and summarized the relationship between the Wnt signaling pathway and bone-related cells. We hope to attract attention to the role of the Wnt signaling pathway in osteoporosis and offer new perspectives and approaches to making a diagnosis and giving treatment for osteoporosis.
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6
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Wolf L, Boutros M. The role of Evi/Wntless in exporting Wnt proteins. Development 2023; 150:286996. [PMID: 36763105 PMCID: PMC10112924 DOI: 10.1242/dev.201352] [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] [Indexed: 02/11/2023]
Abstract
Intercellular communication by Wnt proteins governs many essential processes during development, tissue homeostasis and disease in all metazoans. Many context-dependent effects are initiated in the Wnt-producing cells and depend on the export of lipidated Wnt proteins. Although much focus has been on understanding intracellular Wnt signal transduction, the cellular machinery responsible for Wnt secretion became better understood only recently. After lipid modification by the acyl-transferase Porcupine, Wnt proteins bind their dedicated cargo protein Evi/Wntless for transport and secretion. Evi/Wntless and Porcupine are conserved transmembrane proteins, and their 3D structures were recently determined. In this Review, we summarise studies and structural data highlighting how Wnts are transported from the ER to the plasma membrane, and the role of SNX3-retromer during the recycling of its cargo receptor Evi/Wntless. We also describe the regulation of Wnt export through a post-translational mechanism and review the importance of Wnt secretion for organ development and cancer, and as a future biomarker.
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Affiliation(s)
- Lucie Wolf
- German Cancer Research Center (DKFZ), Division of Signalling and Functional Genomics and Heidelberg University, BioQuant and Department of Cell and Molecular Biology, 69120 Heidelberg, Germany
| | - Michael Boutros
- German Cancer Research Center (DKFZ), Division of Signalling and Functional Genomics and Heidelberg University, BioQuant and Department of Cell and Molecular Biology, 69120 Heidelberg, Germany
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7
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Alvarez-Rodrigo I, Willnow D, Vincent JP. The logistics of Wnt production and delivery. Curr Top Dev Biol 2023; 153:1-60. [PMID: 36967191 DOI: 10.1016/bs.ctdb.2023.01.006] [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] [Indexed: 03/18/2023]
Abstract
Wnts are secreted proteins that control stem cell maintenance, cell fate decisions, and growth during development and adult homeostasis. Wnts carry a post-translational modification not seen in any other secreted protein: during biosynthesis, they are appended with a palmitoleoyl moiety that is required for signaling but also impairs solubility and hence diffusion in the extracellular space. In some contexts, Wnts act only in a juxtacrine manner but there are also instances of long range action. Several proteins and processes ensure that active Wnts reach the appropriate target cells. Some, like Porcupine, Wntless, and Notum are dedicated to Wnt function; we describe their activities in molecular detail. We also outline how the cell infrastructure (secretory, endocytic, and retromer pathways) contribute to the progression of Wnts from production to delivery. We then address how Wnts spread in the extracellular space and form a signaling gradient despite carrying a hydrophobic moiety. We highlight particularly the role of lipid-binding Wnt interactors and heparan sulfate proteoglycans. Finally, we briefly discuss how evolution might have led to the emergence of this unusual signaling pathway.
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8
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Hsu SH, Chuang KT, Wang LT. Role of wnt ligand secretion mediator signaling in cancer development. JOURNAL OF CANCER RESEARCH AND PRACTICE 2023. [DOI: 10.4103/ejcrp.ejcrp-d-22-00029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
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9
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Gone with the Wnt(less): a mechanistic perspective on the journey of Wnt. Biochem Soc Trans 2022; 50:1763-1772. [PMID: 36416660 DOI: 10.1042/bst20220634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/03/2022] [Accepted: 11/07/2022] [Indexed: 11/24/2022]
Abstract
Wnts are short-range signaling proteins, expressed in all metazoans from sponges to humans, critical for cell development and fate. There are 19 different Wnts in the human genome with varying expression levels and patterns, and post-translational modifications. Common to essentially all Wnts is the palmitoleation of a conserved serine by the O-acyltransferase PORCN in the endoplasmic reticulum (ER). All lipidated Wnts then bind a dedicated carrier Wntless (WLS), endowed with the task of transporting them from the ER to the plasma membrane, and ultimately facilitating their release to receptors on the Wnt-receiving cell to initiate signaling. Here, we will focus on the WLS-mediated transport step. There are currently two published structures, both obtained by single-particle cryo-electron microscopy of the Wnt/WLS complex: human Wnt8A-bound and human Wnt3A-bound WLS. We analyze the two Wnt/WLS structures - remarkably similar despite the sequence similarity between Wnt8A and Wnt3A being only ∼39% - to begin to understand the conserved nature of this binding mechanism, and ultimately how one carrier can accommodate a family of 19 different Wnts. By comparing how Wnt associates with WLS with how it binds to PORCN and FZD receptors, we can begin to speculate on mechanisms of Wnt transfer from PORCN to WLS, and from WLS to FZD, thus providing molecular-level insight into these essential steps of the Wnt signaling pathway.
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10
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Functional regulation of Wnt protein through post-translational modifications. Biochem Soc Trans 2022; 50:1797-1808. [DOI: 10.1042/bst20220735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/10/2022] [Accepted: 11/21/2022] [Indexed: 12/13/2022]
Abstract
Wnts are lipid-modified signaling glycoproteins present in all metazoans that play key roles in development and homeostasis. Post-translational modifications of Wnts regulate their function. Wnts have a unique post-translational modification, O-linked palmitoleation, that is absolutely required for their function. This Wnt-specific modification occurs during Wnt biosynthesis in the endoplasmic reticulum (ER), catalyzed by the O-acyltransferase Porcupine (PORCN). Palmitoleation is required for Wnt to bind to its transporter Wntless (WLS/Evi) as well as to its receptor Frizzled (FZD). Recent structural studies have illustrated how PORCN recognizes its substrates, and how drugs inhibit this. The abundance of WLS is tightly regulated by intracellular recycling and ubiquitylation-mediated degradation in the ER. The function of Wnt glycosylation is less well understood, and the sites and types of glycosylation are not largely conserved among different Wnts. In polarized tissues, the type of glycans can determine whether the route of trafficking is apical or basolateral. In addition, pairing of the 24 highly conserved cysteines in Wnts to form disulfide bonds is critical in maintaining proper structure and activities. Extracellularly, the amino terminus of a subset of Wnts can be cleaved by a dedicated glycosylphosphatidylinositol (GPI)-anchored metalloprotease TIKI, resulting in the inactivation of these Wnt proteins. Additionally, NOTUM is a secreted extracellular carboxylesterase that removes the palmitoleate moiety from Wnt, antagonizing its activity. In summary, Wnt signaling activity is controlled at multiple layers by post-translational modifications.
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11
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Kantaputra P, Tripuwabhrut K, Jatooratthawichot P, Adisornkanj P, Hatsadaloi A, Porntrakoolsaree N, Kaewgaya M, Olsen B, Tongsima S, Ngamphiw C, Ketudat Cairns JR. Mutations in the WLS are associated with dental anomalies, torus palatinus, and torus mandibularis. Eur J Orthod 2022; 45:317-323. [DOI: 10.1093/ejo/cjac068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Summary
Background
Canonical and non-canonical WNT signaling are important for odontogenesis. WNT ligand secretion mediator (WLS; MIM611514) is required to transport lipid-modified WNT proteins from the Golgi to the cell membrane, where canonical and non-canonical WNT proteins are released into the extracellular milieu. Biallelic pathogenic variants in WLS are implicated in autosomal recessive Zaki syndrome (ZKS; MIM 619648), the only genetic condition known to be caused by pathogenic variants in WLS.
Objective
To investigate molecular etiology of dental anomalies in 250 patients with or without oral exostoses.
Patients and methods
Clinical and radiographic examination, and whole exome sequencing, were performed in the case of 250 patients with dental anomalies with or without oral exostoses.
Results
Four extremely rare heterozygous missense variants (p.Ile20Thr, p.Met46Leu, p.Ser453Ile and p.Leu516Phe) in WLS were identified in 11 patients with dental anomalies. In five of these patients, a torus palatinus or a torus mandibularis was observed.
Conclusion
We report for the first time the heterozygous WLS variants in patients with dental anomalies. Root maldevelopments in patients with WLS variants supports the role of canonical and non-canonical WNT signaling in root development. We also show that variants in WLS were implicated in torus palatinus and torus mandibularis. In addition, this is the first time that heterozygous carriers of WLS variants were found to manifest phenotypes. WLS variants were likely to have adverse effects on the concentration of WNT ligands delivered to the cell membrane, resulting in aberrant canonical and non-canonical WNT signaling, and subsequent phenotypes.
Limitations of the study
Patient’s positioning during the acquisition of panoramic radiography might have affected the appearance of the tooth structures. If we had all family members of each patient to study co-segregation between genotype and phenotype, it would have strengthened the association of WLS variants and the phenotypes.
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Affiliation(s)
- Piranit Kantaputra
- Center of Excellence in Medical Genetics Research, Chiang Mai University , Chiang Mai , Thailand
- Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University , Chiang Mai , Thailand
| | - Kanich Tripuwabhrut
- Division of Orthodontics, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University , Chiang Mai , Thailand
| | - Peeranat Jatooratthawichot
- School of Chemistry, Institute of Science, and Center for Biomolecular Structure, Function and Application, Suranaree University of Technology , Nakhon Ratchasima , Thailand
| | - Ploy Adisornkanj
- Center of Excellence in Medical Genetics Research, Chiang Mai University , Chiang Mai , Thailand
- Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University , Chiang Mai , Thailand
- Dental Department, Sawang Daen Din Crown Prince Hospital , Sakon Nakhon , Thailand
| | | | | | - Massupa Kaewgaya
- Center of Excellence in Medical Genetics Research, Chiang Mai University , Chiang Mai , Thailand
| | - Bjorn Olsen
- Department of Developmental Biology, Harvard School of Dental Medicine, Harvard University , Boston, MA , USA
| | - Sissades Tongsima
- National Biobank of Thailand, National Science and Technology Development Agency (NSTDA), Thailand Science Park , Pathum Thani , Thailand
| | - Chumpol Ngamphiw
- National Biobank of Thailand, National Science and Technology Development Agency (NSTDA), Thailand Science Park , Pathum Thani , Thailand
| | - James R Ketudat Cairns
- School of Chemistry, Institute of Science, and Center for Biomolecular Structure, Function and Application, Suranaree University of Technology , Nakhon Ratchasima , Thailand
- Laboratory of Biochemistry, Chulabhorn Research Institute , Bangkok , Thailand
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12
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Mechanisms and inhibition of Porcupine-mediated Wnt acylation. Nature 2022; 607:816-822. [PMID: 35831507 DOI: 10.1038/s41586-022-04952-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 06/08/2022] [Indexed: 12/14/2022]
Abstract
Wnt signalling is essential for regulation of embryonic development and adult tissue homeostasis1-3, and aberrant Wnt signalling is frequently associated with cancers4. Wnt signalling requires palmitoleoylation on a hairpin 2 motif by the endoplasmic reticulum-resident membrane-bound O-acyltransferase Porcupine5-7 (PORCN). This modification is indispensable for Wnt binding to its receptor Frizzled, which triggers signalling8,9. Here we report four cryo-electron microscopy structures of human PORCN: the complex with the palmitoleoyl-coenzyme A (palmitoleoyl-CoA) substrate; the complex with the PORCN inhibitor LGK974, an anti-cancer drug currently in clinical trials10; the complex with LGK974 and WNT3A hairpin 2 (WNT3Ap); and the complex with a synthetic palmitoleoylated WNT3Ap analogue. The structures reveal that hairpin 2 of WNT3A, which is well conserved in all Wnt ligands, inserts into PORCN from the lumenal side, and the palmitoleoyl-CoA accesses the enzyme from the cytosolic side. The catalytic histidine triggers the transfer of the unsaturated palmitoleoyl group to the target serine on the Wnt hairpin 2, facilitated by the proximity of the two substrates. The inhibitor-bound structure shows that LGK974 occupies the palmitoleoyl-CoA binding site to prevent the reaction. Thus, this work provides a mechanism for Wnt acylation and advances the development of PORCN inhibitors for cancer treatment.
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13
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Kantaputra P, Jatooratthawichot P, Tantachamroon O, Nanekrungsan K, Intachai W, Olsen B, Tongsima S, Ngamphiw C, Cairns JRK. Novel Dental Anomaly-associated Mutations in WNT10A Protein Binding Sites. Int Dent J 2022; 73:79-86. [PMID: 35537890 PMCID: PMC9875279 DOI: 10.1016/j.identj.2022.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/06/2022] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE WNT/β-catenin signaling is initiated by binding of a WNT protein to a Frizzled (FZD) receptor and a co-receptor, low-density lipoprotein (LDL) receptor-related protein 5 or 6 (LRP5/6). The objective of this study was to find the genetic variants responsible for dental anomalies found in 4 families. METHODS Clinical and radiographic examination and whole exome sequencing were performed on 5 patients affected with dental anomalies and the mutant proteins modeled. RESULTS Five patients were heterozygous for the WNT10A variants, including c.877C>T; p.Arg293Cys, c.874A>G; p.Ser292Gly, c.1042C>T; p.Arg348Cys, and c.1039G>T; p.347GluX. The p.Arg293Cys and p.Ser292Gly mutations are located in the WNT10A N-terminal domain region with binding sites for FZD receptor, porcupine, WNTLESS, and extracellular binding proteins, so they are likely to have adverse effects on binding these proteins. The p.Arg348Cys mutation, which is located in the binding site of LRP5/6 co-receptors, is postulated to result in impaired binding to these co-receptors. The nonsense mutation p.347GluX is predicted to result in the truncation of most of the C-terminal domain, which is likely to disrupt the binding of WNT10A to WNTLESS, the membrane protein that binds lipid-acylated WNT proteins to carry them from the endoplasmic reticulum to the cell surface and FZD. CONCLUSIONS Four novel mutations in WNT10A were identified in patients with isolated tooth agenesis. The mutations in the N-terminal domain and the interface between the N- and C-terminal domains of WNT10A in our patients are likely to disrupt its binding with FZD, LRP5/6, and various other proteins involved in WNT10A processing and transport, impair WNT and SHH signaling, and subsequently result in tooth agenesis, microdontia, and root maldevelopment.
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Affiliation(s)
- Piranit Kantaputra
- Center of Excellence in Medical Genetics Research, Chiang Mai University, Chiang Mai, Thailand,Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand,Corresponding author. Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry; Faculty of Dentistry, Chiang Mai University; Chiang Mai 50200, Thailand.
| | - Peeranat Jatooratthawichot
- School of Chemistry, Institute of Science, and Center for Biomolecular Structure, Function and Application, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | | | | | - Worrachet Intachai
- Center of Excellence in Medical Genetics Research, Chiang Mai University, Chiang Mai, Thailand
| | - Bjorn Olsen
- Department of Developmental Biology, Harvard School of Dental Medicine, Harvard University, Boston, Massachusetts, USA
| | - Sissades Tongsima
- National Biobank of Thailand, National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Chumpol Ngamphiw
- National Biobank of Thailand, National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - James R. Ketudat Cairns
- School of Chemistry, Institute of Science, and Center for Biomolecular Structure, Function and Application, Suranaree University of Technology, Nakhon Ratchasima, Thailand,Laboratory of Biochemistry, Chulabhorn Research Institute, Bangkok, Thailand
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An itch for things remote: The journey of Wnts. Curr Top Dev Biol 2022; 150:91-128. [DOI: 10.1016/bs.ctdb.2022.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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