1
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Ye Y, Liang X, Wang G, Bewley MC, Hamamoto K, Liu X, Flanagan JM, Wang HG, Takahashi Y, Tian F. Identification of membrane curvature sensing motifs essential for VPS37A phagophore recruitment and autophagosome closure. Commun Biol 2024; 7:334. [PMID: 38491121 PMCID: PMC10942982 DOI: 10.1038/s42003-024-06026-7] [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: 02/06/2024] [Accepted: 03/07/2024] [Indexed: 03/18/2024] Open
Abstract
VPS37A, an ESCRT-I complex component, is required for recruiting a subset of ESCRT proteins to the phagophore for autophagosome closure. However, the mechanism by which VPS37A is targeted to the phagophore remains obscure. Here, we demonstrate that the VPS37A N-terminal domain exhibits selective interactions with highly curved membranes, mediated by two membrane-interacting motifs within the disordered regions surrounding its Ubiquitin E2 variant-like (UEVL) domain. Site-directed mutations of residues in these motifs disrupt ESCRT-I localization to the phagophore and result in defective phagophore closure and compromised autophagic flux in vivo, highlighting their essential role during autophagy. In conjunction with the UEVL domain, we postulate that these motifs guide a functional assembly of the ESCRT machinery at the highly curved tip of the phagophore for autophagosome closure. These results advance the notion that the distinctive membrane architecture of the cup-shaped phagophore spatially regulates autophagosome biogenesis.
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Affiliation(s)
- Yansheng Ye
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, Hershey, PA, 17033, USA.
| | - Xinwen Liang
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Guifang Wang
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, Hershey, PA, 17033, USA
| | - Maria C Bewley
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, Hershey, PA, 17033, USA
| | - Kouta Hamamoto
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Xiaoming Liu
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - John M Flanagan
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, Hershey, PA, 17033, USA
| | - Hong-Gang Wang
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Yoshinori Takahashi
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
| | - Fang Tian
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, Hershey, PA, 17033, USA.
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2
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Glover J, Scourfield EJ, Ventimiglia LN, Yang X, Lynham S, Agromayor M, Martin-Serrano J. UMAD1 contributes to ESCRT-III dynamic subunit turnover during cytokinetic abscission. J Cell Sci 2023; 136:jcs261097. [PMID: 37439191 PMCID: PMC10445733 DOI: 10.1242/jcs.261097] [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: 02/19/2023] [Accepted: 06/26/2023] [Indexed: 07/14/2023] Open
Abstract
Abscission is the final stage of cytokinesis whereby the midbody, a thin intercellular bridge, is resolved to separate the daughter cells. Cytokinetic abscission is mediated by the endosomal sorting complex required for transport (ESCRT), a conserved membrane remodelling machinery. The midbody organiser CEP55 recruits early acting ESCRT factors such as ESCRT-I and ALIX (also known as PDCD6IP), which subsequently initiate the formation of ESCRT-III polymers that sever the midbody. We now identify UMAD1 as an ESCRT-I subunit that facilitates abscission. UMAD1 selectively associates with VPS37C and VPS37B, supporting the formation of cytokinesis-specific ESCRT-I assemblies. TSG101 recruits UMAD1 to the site of midbody abscission, to stabilise the CEP55-ESCRT-I interaction. We further demonstrate that the UMAD1-ESCRT-I interaction facilitates the final step of cytokinesis. Paradoxically, UMAD1 and ALIX co-depletion has synergistic effects on abscission, whereas ESCRT-III recruitment to the midbody is not inhibited. Importantly, we find that both UMAD1 and ALIX are required for the dynamic exchange of ESCRT-III subunits at the midbody. Therefore, UMAD1 reveals a key functional connection between ESCRT-I and ESCRT-III that is required for cytokinesis.
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Affiliation(s)
- James Glover
- Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London SE1 9RT, UK
| | - Edward J. Scourfield
- Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London SE1 9RT, UK
| | - Leandro N. Ventimiglia
- Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London SE1 9RT, UK
| | - Xiaoping Yang
- Proteomics Facility, Centre of Excellence for Mass Spectrometry, King's College London, London SE5 9NU, UK
| | - Steven Lynham
- Proteomics Facility, Centre of Excellence for Mass Spectrometry, King's College London, London SE5 9NU, UK
| | - Monica Agromayor
- Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London SE1 9RT, UK
| | - Juan Martin-Serrano
- Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London SE1 9RT, UK
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3
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Zhang C, Zhu X, Zhu Z, Ni R, Liu T, Zheng H, Liu S, Cao L, Zhong P, Tian W. Novel Frameshift Heterozygous Mutation in UBAP1 Gene Causing Spastic Paraplegia-80: Case Report With Literature Review. Front Neurol 2022; 13:820202. [PMID: 35321509 PMCID: PMC8936171 DOI: 10.3389/fneur.2022.820202] [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: 11/22/2021] [Accepted: 02/04/2022] [Indexed: 11/16/2022] Open
Abstract
Hereditary spastic paraplegia (HSP) represents a group of rare inherited neurodegenerative conditions and is characterized by progressive lower limb spasticity. Ubiquitin-associated protein 1 (UBAP1)-related HSP is classified as spastic paraplegia-80 (SPG80), which is an autosomal-dominant (AD) juvenile-onset neurologic disorder and mainly affects the lower limbs. We described the clinical and genetic features of two patients in the same family caused by heterozygous mutation of the UBAP1 gene. The proband was a 34-year-old woman with progressive spasticity and hyperreflexia in the lower limbs for 26 years. Her mother also had similar symptoms since the age of 6. The proband and her mother only had motor dysfunctions, such as unsteady gait, hypertonia, and hyperreflexia of lower limbs. Other system functions (sensory, urinary, visual, and cognitive impairments) were not involved. WES disclosed a frameshift mutation (c.371dupT) in the UBAP1 gene, which was predicted to be “likely pathogenic” and was co-segregated in the pedigree. c.371dupT, encoding the truncated UBAP1 protein with 72.6% missing of the normal amino acid sequence, is responsible for the spastic paraplegia (SPG) in this family. In combination with clinical characteristics, genetic testing results, and co-segregation analysis, the diagnosis is considered to be pure spastic paraplegia-80 (SPG80), which is an AD disease. By retrospectively analyzing the documented cases, we comprehensively review the phenotypic features and summarize the genotype spectrum of SPG80 to enhance earlier recognition and therapeutic strategies.
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Affiliation(s)
- Chao Zhang
- Suzhou Hospital of Anhui Medical University Suzhou Municipal Hospital of Anhui Province, Suzou, China
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaowei Zhu
- Suzhou Hospital of Anhui Medical University Suzhou Municipal Hospital of Anhui Province, Suzou, China
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Zeyu Zhu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ruilong Ni
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
- School of Medicine, Anhui University of Science and Technology, Huainan, China
| | - Taotao Liu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
- School of Medicine, Anhui University of Science and Technology, Huainan, China
| | - Haoran Zheng
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
- School of Medicine, Anhui University of Science and Technology, Huainan, China
| | - Shihua Liu
- Suzhou Hospital of Anhui Medical University Suzhou Municipal Hospital of Anhui Province, Suzou, China
| | - Li Cao
- Suzhou Hospital of Anhui Medical University Suzhou Municipal Hospital of Anhui Province, Suzou, China
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ping Zhong
- Suzhou Hospital of Anhui Medical University Suzhou Municipal Hospital of Anhui Province, Suzou, China
- Ping Zhong
| | - Wotu Tian
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
- *Correspondence: Wotu Tian
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4
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Bian X, Cheng G, Sun X, Liu H, Zhang X, Han Y, Li B, Li N. Two novel truncating variants in UBAP1 are responsible for hereditary spastic paraplegia. PLoS One 2021; 16:e0253871. [PMID: 34191852 PMCID: PMC8244911 DOI: 10.1371/journal.pone.0253871] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 06/14/2021] [Indexed: 01/05/2023] Open
Abstract
Hereditary spastic paraplegias (HSPs) are a group of rare neurodegenerative disorders. HSPs are complex disorders and are clinically and genetically heterogeneous. To date, more than 80 genes or genetic loci have been reported to be responsible for HSPs in a Mendelian-dependent manner. Most recently, ubiquitin-associated protein 1 (UBAP1) has been recognized to be involved in HSP. Here, we identified novel protein truncating variants in two families with pure form of HSP. A novel deletion (c.468_469delTG) in the UBAP1 gene was found in the first family, whereas a nonsense variant (c.512T>G) was ascertained in the second family. The variants were confirmed in all patients but were not detected in unaffected family members. The mutations resulted in truncated proteins of UBAP1. The variants did not result in different subcellular localizations in neuro-2a cells. However, each of the two variants impaired neurite outgrowth. Taken together, our findings expand the pathogenic spectrum of UBAP1 variants in HSP.
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Affiliation(s)
- Xinchao Bian
- Department of Neurosurgery, Zibo Central Hospital, Shandong University, Zibo, China
| | - Guangying Cheng
- Department of Gynecology, Zibo Central Hospital, Shandong University, Zibo, China
| | - Xinbo Sun
- Department of Neurosurgery, Zibo Central Hospital, Shandong University, Zibo, China
| | - Hongkun Liu
- Department of Integrated Traditional Chinese and Western Medicine Orthopedics, Zibo Central Hospital, Shandong University, Zibo, China
| | - Xiangmao Zhang
- Department of Neurosurgery, Zibo Central Hospital, Shandong University, Zibo, China
| | - Yu Han
- Department of Neurosurgery, Zibo Central Hospital, Shandong University, Zibo, China
| | - Bo Li
- Department of Integrated Traditional Chinese and Western Medicine Orthopedics, Zibo Central Hospital, Shandong University, Zibo, China
| | - Ning Li
- Department of Integrated Traditional Chinese and Western Medicine Orthopedics, Zibo Central Hospital, Shandong University, Zibo, China
- * E-mail:
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5
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Inukai R, Mori K, Kuwata K, Suzuki C, Maki M, Takahara T, Shibata H. The Novel ALG-2 Target Protein CDIP1 Promotes Cell Death by Interacting with ESCRT-I and VAPA/B. Int J Mol Sci 2021; 22:ijms22031175. [PMID: 33503978 PMCID: PMC7865452 DOI: 10.3390/ijms22031175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 12/15/2022] Open
Abstract
Apoptosis-linked gene 2 (ALG-2, also known as PDCD6) is a member of the penta-EF-hand (PEF) family of Ca2+-binding proteins. The murine gene encoding ALG-2 was originally reported to be an essential gene for apoptosis. However, the role of ALG-2 in cell death pathways has remained elusive. In the present study, we found that cell death-inducing p53 target protein 1 (CDIP1), a pro-apoptotic protein, interacts with ALG-2 in a Ca2+-dependent manner. Co-immunoprecipitation analysis of GFP-fused CDIP1 (GFP-CDIP1) revealed that GFP-CDIP1 associates with tumor susceptibility gene 101 (TSG101), a known target of ALG-2 and a subunit of endosomal sorting complex required for transport-I (ESCRT-I). ESCRT-I is a heterotetrameric complex composed of TSG101, VPS28, VPS37 and MVB12/UBAP1. Of diverse ESCRT-I species originating from four VPS37 isoforms (A, B, C, and D), CDIP1 preferentially associates with ESCRT-I containing VPS37B or VPS37C in part through the adaptor function of ALG-2. Overexpression of GFP-CDIP1 in HEK293 cells caused caspase-3/7-mediated cell death. In addition, the cell death was enhanced by co-expression of ALG-2 and ESCRT-I, indicating that ALG-2 likely promotes CDIP1-induced cell death by promoting the association between CDIP1 and ESCRT-I. We also found that CDIP1 binds to vesicle-associated membrane protein-associated protein (VAP)A and VAPB through the two phenylalanines in an acidic tract (FFAT)-like motif in the C-terminal region of CDIP1, mutations of which resulted in reduction of CDIP1-induced cell death. Therefore, our findings suggest that different expression levels of ALG-2, ESCRT-I subunits, VAPA and VAPB may have an impact on sensitivity of anticancer drugs associated with CDIP1 expression.
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Affiliation(s)
- Ryuta Inukai
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
| | - Kanako Mori
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
| | - Keiko Kuwata
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan;
| | - Chihiro Suzuki
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
| | - Masatoshi Maki
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
| | - Terunao Takahara
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
| | - Hideki Shibata
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; (R.I.); (K.M.); (C.S.); (M.M.); (T.T.)
- Correspondence:
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6
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Kolmus K, Erdenebat P, Szymańska E, Stewig B, Goryca K, Derezińska-Wołek E, Szumera-Ciećkiewicz A, Brewińska-Olchowik M, Piwocka K, Prochorec-Sobieszek M, Mikula M, Miączyńska M. Concurrent depletion of Vps37 proteins evokes ESCRT-I destabilization and profound cellular stress responses. J Cell Sci 2021; 134:134/1/jcs250951. [PMID: 33419951 DOI: 10.1242/jcs.250951] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/09/2020] [Indexed: 01/01/2023] Open
Abstract
Molecular details of how endocytosis contributes to oncogenesis remain elusive. Our in silico analysis of colorectal cancer (CRC) patients revealed stage-dependent alterations in the expression of 112 endocytosis-related genes. Among them, transcription of the endosomal sorting complex required for transport (ESCRT)-I component VPS37B was decreased in the advanced stages of CRC. Expression of other ESCRT-I core subunits remained unchanged in the investigated dataset. We analyzed an independent cohort of CRC patients, which also showed reduced VPS37A mRNA and protein abundance. Transcriptomic profiling of CRC cells revealed non-redundant functions of Vps37 proteins. Knockdown of VPS37A and VPS37B triggered p21 (CDKN1A)-mediated inhibition of cell proliferation and sterile inflammatory response driven by the nuclear factor (NF)-κB transcription factor and associated with mitogen-activated protein kinase signaling. Co-silencing of VPS37C further potentiated activation of these independently induced processes. The type and magnitude of transcriptional alterations correlated with the differential ESCRT-I stability upon individual and concurrent Vps37 depletion. Our study provides novel insights into cancer cell biology by describing cellular stress responses that are associated with ESCRT-I destabilization.
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Affiliation(s)
- Krzysztof Kolmus
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Purevsuren Erdenebat
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Ewelina Szymańska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Blair Stewig
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Krzysztof Goryca
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland
| | - Edyta Derezińska-Wołek
- Department of Pathology and Laboratory Medicine, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland.,Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland
| | - Anna Szumera-Ciećkiewicz
- Department of Pathology and Laboratory Medicine, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland.,Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland
| | | | - Katarzyna Piwocka
- Laboratory of Cytometry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland
| | - Monika Prochorec-Sobieszek
- Department of Pathology and Laboratory Medicine, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland.,Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland
| | - Michał Mikula
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland
| | - Marta Miączyńska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
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7
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Lin X, Su HZ, Dong EL, Lin XH, Zhao M, Yang C, Wang C, Wang J, Chen YJ, Yu H, Xu J, Ma LX, Xiong ZQ, Wang N, Chen WJ. Stop-gain mutations in UBAP1 cause pure autosomal-dominant spastic paraplegia. Brain 2020; 142:2238-2252. [PMID: 31203368 DOI: 10.1093/brain/awz158] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 03/14/2019] [Accepted: 04/15/2019] [Indexed: 12/15/2022] Open
Abstract
Hereditary spastic paraplegias refer to a heterogeneous group of neurodegenerative disorders resulting from degeneration of the corticospinal tract. Clinical characterization of patients with hereditary spastic paraplegias represents progressive spasticity, exaggerated reflexes and muscular weakness. Here, to expand on the increasingly broad pools of previously unknown hereditary spastic paraplegia causative genes and subtypes, we performed whole exome sequencing for six affected and two unaffected individuals from two unrelated Chinese families with an autosomal dominant hereditary spastic paraplegia and lacking mutations in known hereditary spastic paraplegia implicated genes. The exome sequencing revealed two stop-gain mutations, c.247_248insGTGAATTC (p.I83Sfs*11) and c.526G>T (p.E176*), in the ubiquitin-associated protein 1 (UBAP1) gene, which co-segregated with the spastic paraplegia. We also identified two UBAP1 frameshift mutations, c.324_325delCA (p.H108Qfs*10) and c.425_426delAG (p.K143Sfs*15), in two unrelated families from an additional 38 Chinese pedigrees with autosomal dominant hereditary spastic paraplegias and lacking mutations in known causative genes. The primary disease presentation was a pure lower limb predominant spastic paraplegia. In vivo downregulation of Ubap1 in zebrafish causes abnormal organismal morphology, inhibited motor neuron outgrowth, decreased mobility, and shorter lifespan. UBAP1 is incorporated into endosomal sorting complexes required for transport complex I and binds ubiquitin to function in endosome sorting. Patient-derived truncated form(s) of UBAP1 cause aberrant endosome clustering, pronounced endosome enlargement, and cytoplasmic accumulation of ubiquitinated proteins in HeLa cells and wild-type mouse cortical neuron cultures. Biochemical and immunocytochemical experiments in cultured cortical neurons derived from transgenic Ubap1flox mice confirmed that disruption of UBAP1 leads to dysregulation of both early endosome processing and ubiquitinated protein sorting. Strikingly, deletion of Ubap1 promotes neurodegeneration, potentially mediated by apoptosis. Our study provides genetic and biochemical evidence that mutations in UBAP1 can cause pure autosomal dominant spastic paraplegia.
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Affiliation(s)
- Xiang Lin
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou 350005, China
| | - Hui-Zhen Su
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - En-Lin Dong
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Xiao-Hong Lin
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Miao Zhao
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Can Yang
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Chong Wang
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Jie Wang
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yi-Jun Chen
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Hongjie Yu
- Program for Personalized Cancer Care, NorthShore University HealthSystem, Evanston, IL 60201, USA
| | - Jianfeng Xu
- Program for Personalized Cancer Care, NorthShore University HealthSystem, Evanston, IL 60201, USA
| | - Li-Xiang Ma
- Department of Anatomy, Histology and Embryology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Zhi-Qi Xiong
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ning Wang
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou 350005, China
| | - Wan-Jin Chen
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou 350005, China
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8
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Autosomal dominant hereditary spastic paraplegia caused by mutation of UBAP1. Neurogenetics 2020; 21:169-177. [PMID: 32222895 DOI: 10.1007/s10048-020-00608-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/21/2020] [Indexed: 12/12/2022]
Abstract
Hereditary spastic paraplegias (HSP) are a group of rare neurodegenerative diseases characterized by progressive spastic paraparesis. UBAP1 was recently found to induce a rare type of HSP (SPG80). We identified a family with eight inherited spastic paraplegic patients carrying a novel heterozygous mutation c.279delG (p.S94Vfs*9) of UBAP1. We demonstrated a lack of functional UBAP1 in these patients, resulting in the neurological disorder caused by interceptions of the ESCRT pathway. Extending from the older onset-age identified from this family, we found that comparing with the European and other populations, Asian patients displayed less proportion of severe patients and an older average age at onset. The origins of SPG80 patients associated with both their onset age and their disease severity, while the age at onset was not correlated with the disease severity.
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9
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Gu S, Chen CA, Rosenfeld JA, Cope H, Launay N, Flanigan KM, Waldrop MA, Schrader R, Juusola J, Goker-Alpan O, Milunsky A, Schlüter A, Troncoso M, Pujol A, Tan QKG, Schaaf CP, Meng L. Truncating variants in UBAP1 associated with childhood-onset nonsyndromic hereditary spastic paraplegia. Hum Mutat 2019; 41:632-640. [PMID: 31696996 DOI: 10.1002/humu.23950] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 10/10/2019] [Accepted: 11/05/2019] [Indexed: 01/22/2023]
Abstract
Hereditary spastic paraplegia (HSP) is a group of disorders with predominant symptoms of lower-extremity weakness and spasticity. Despite the delineation of numerous genetic causes of HSP, a significant portion of individuals with HSP remain molecularly undiagnosed. Through exome sequencing, we identified five unrelated families with childhood-onset nonsyndromic HSP, all presenting with progressive spastic gait, leg clonus, and toe walking starting from 7 to 8 years old. A recurrent two-base pair deletion (c.426_427delGA, p.K143Sfs*15) in the UBAP1 gene was found in four families, and a similar variant (c.475_476delTT, p.F159*) was detected in a fifth family. The variant was confirmed to be de novo in two families and inherited from an affected parent in two other families. RNA studies performed in lymphocytes from one patient with the de novo c.426_427delGA variant demonstrated escape of nonsense-mediated decay of the UBAP1 mutant transcript, suggesting the generation of a truncated protein. Both variants identified in this study are predicted to result in truncated proteins losing the capacity of binding to ubiquitinated proteins, hence appearing to exhibit a dominant-negative effect on the normal function of the endosome-specific endosomal sorting complexes required for the transport-I complex.
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Affiliation(s)
- Shen Gu
- Department of Molecular and Human Genetics, Faculty of Medicine, Baylor College of Medicine, Houston, Texas.,School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong S.A.R
| | - Chun-An Chen
- Department of Molecular and Human Genetics, Faculty of Medicine, Baylor College of Medicine, Houston, Texas
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Faculty of Medicine, Baylor College of Medicine, Houston, Texas
| | - Heidi Cope
- Department of Pediatrics, Division of Medical Genetics, Duke University School of Medicine, Durham, North Carolina
| | - Nathalie Launay
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain.,Centre for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Kevin M Flanigan
- Center for Gene Therapy, Nationwide Children's Hospital, Columbus, Ohio
| | - Megan A Waldrop
- Center for Gene Therapy, Nationwide Children's Hospital, Columbus, Ohio
| | - Rachel Schrader
- Center for Gene Therapy, Nationwide Children's Hospital, Columbus, Ohio
| | | | | | - Aubrey Milunsky
- Center for Human Genetics and Department of Obstetrics & Gynecology, Tufts University School of Medicine, Boston, Massachusetts
| | - Agatha Schlüter
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain.,Centre for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Mónica Troncoso
- Child Neurology Service, Hospital San Borja Arriarán, Universidad de Chile, Santiago, Chile
| | - Aurora Pujol
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain.,Centre for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain
| | - Queenie K-G Tan
- Department of Pediatrics, Division of Medical Genetics, Duke University School of Medicine, Durham, North Carolina
| | | | - Linyan Meng
- Department of Molecular and Human Genetics, Faculty of Medicine, Baylor College of Medicine, Houston, Texas.,Baylor Genetics, Houston, Texas
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10
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Nan H, Ichinose Y, Tanaka M, Koh K, Ishiura H, Mitsui J, Mizukami H, Morimoto M, Hamada S, Ohtsuka T, Tsuji S, Takiyama Y. UBAP1 mutations cause juvenile-onset hereditary spastic paraplegias (SPG80) and impair UBAP1 targeting to endosomes. J Hum Genet 2019; 64:1055-1065. [PMID: 31515522 DOI: 10.1038/s10038-019-0670-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/28/2019] [Accepted: 08/30/2019] [Indexed: 12/17/2022]
Abstract
We aimed to find a new causative gene and elucidate the molecular mechanisms underlying a new type of hereditary spastic paraplegia (HSP). Patients with HSP were recruited from the Japan Spastic Paraplegia Research Consortium (JASPAC). Exome sequencing of genomic DNA from patients in four families was carried out, followed by Sanger sequencing of the UBAP1 gene. A mouse homolog of one UBAP1 frameshift mutation carried by one of the patients was created as a disease model. Functional properties of the UBAP1 wild type and UBAP1-mutant in mouse hippocampus neurons were examined. We identified three novel heterozygous loss of function mutations (c.425_426delAG, c.312delC, and c.535G>T) in the UBAP1 gene as the genetic cause of a new type of HSP (SPG80). All the patients presented identical clinical features of a pure type of juvenile-onset HSP. Functional studies on mouse hippocampal neurons revealed that the C-terminal deletion UBAP1-mutant of our disease model had lost its ability to bind ubiquitin in vitro. Overexpression of the UBAP1 wild type interacts directly with ubiquitin on enlarged endosomes, while the UBAP1-mutant cannot be recruited to endosome membranes. Our study demonstrated that mutations in the UBAP1 gene cause a new type of HSP and elucidated its pathogenesis. The full-length UBAP1 protein is involved in endosomal dynamics in neurons, while loss of UBAP1 function may perturb endosomal fusion and sorting of ubiquitinated cargos. These effects could be more prominent in neurons, thereby giving rise to the phenotype of a neurodegenerative disease such as HSP.
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Affiliation(s)
- Haitian Nan
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Yuta Ichinose
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Masaki Tanaka
- Institute of Medical Genomics, International University of Health and Welfare, Chiba, 286-8686, Japan
| | - Kishin Koh
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Hiroyuki Ishiura
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-8655, Japan
| | - Jun Mitsui
- Department of Molecular Neurology, University of Tokyo, Graduate School of Medicine, Tokyo, 113-8655, Japan
| | - Heisuke Mizukami
- Department of Neurology, Yokohama City Seibu Hospital, St. Marianna University School of Medicine, Yokohama, 241-0811, Japan
| | - Masafumi Morimoto
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Shun Hamada
- Department of Biochemistry, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Toshihisa Ohtsuka
- Department of Biochemistry, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Shoji Tsuji
- Institute of Medical Genomics, International University of Health and Welfare, Chiba, 286-8686, Japan.,Department of Molecular Neurology, University of Tokyo, Graduate School of Medicine, Tokyo, 113-8655, Japan
| | - Yoshihisa Takiyama
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan.
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11
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Desrochers G, Kazan JM, Pause A. Structure and functions of His domain protein tyrosine phosphatase in receptor trafficking and cancer. Biochem Cell Biol 2019; 97:68-72. [DOI: 10.1139/bcb-2017-0322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cell surface receptors trigger the activation of signaling pathways to regulate key cellular processes, including cell survival and proliferation. Internalization, sorting, and trafficking of activated receptors, therefore, play a major role in the regulation and attenuation of cell signaling. Efficient sorting of endocytosed receptors is performed by the ESCRT machinery, which targets receptors for degradation by the sequential establishment of protein complexes. These events are tightly regulated and malfunction of ESCRT components can lead to abnormal trafficking and sustained signaling and promote tumor formation or progression. In this review, we analyze the modular domain organization of the alternative ESCRT protein HD-PTP and its role in receptor trafficking and tumorigenesis.
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Affiliation(s)
- Guillaume Desrochers
- Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada
- Goodman Cancer Research Centre, McGill University, Montréal, QC H3A 1A3, Canada
| | - Jalal M. Kazan
- Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada
- Goodman Cancer Research Centre, McGill University, Montréal, QC H3A 1A3, Canada
| | - Arnim Pause
- Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada
- Goodman Cancer Research Centre, McGill University, Montréal, QC H3A 1A3, Canada
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12
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Dissecting the role of His domain protein tyrosine phosphatase/PTPN23 and ESCRTs in sorting activated epidermal growth factor receptor to the multivesicular body. Biochem Soc Trans 2018; 46:1037-1046. [PMID: 30190330 PMCID: PMC6195633 DOI: 10.1042/bst20170443] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/31/2018] [Accepted: 07/31/2018] [Indexed: 02/06/2023]
Abstract
Sorting of activated epidermal growth factor receptor (EGFR) into intraluminal vesicles (ILVs) within the multivesicular body (MVB) is an essential step during the down-regulation of the receptor. The machinery that drives EGFR sorting attaches to the cytoplasmic face of the endosome and generates vesicles that bud into the endosome lumen, but somehow escapes encapsulation itself. This machinery is termed the ESCRT (endosomal sorting complexes required for transport) pathway, a series of multi-protein complexes and accessory factors first identified in yeast. Here, we review the yeast ESCRT pathway and describe the corresponding components in mammalian cells that sort EGFR. One of these is His domain protein tyrosine phosphatase (HD-PTP/PTPN23), and we review the interactions involving HD-PTP and ESCRTs. Finally, we describe a working model for how this ESCRT pathway might overcome the intrinsic topographical problem of EGFR sorting to the MVB lumen.
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13
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Mealy MA, Nam TS, Pardo SJ, Pardo CA, Sobreira NL, Avramopoulos D, Valle D, Burns KH, Levy M. Familial monophasic acute transverse myelitis due to the pathogenic variant in VPS37A. NEUROLOGY-GENETICS 2018; 4:e213. [PMID: 29473047 PMCID: PMC5820602 DOI: 10.1212/nxg.0000000000000213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/20/2017] [Indexed: 12/30/2022]
Abstract
Objective To identify genetic differences among siblings with a family history of idiopathic transverse myelitis (ITM). Methods We compared whole-exome sequencing (WES) on germline samples from the 2 affected sisters with ITM with 3 of their healthy siblings. Results The 2 sisters with ITM both had acute onset of sensory loss in the legs, weakness, and bowel/bladder dysfunction. The first developed ITM at age 15 years with a clinical nadir of complete paralysis, which slowly recovered over a few years. MRI demonstrated a persistent T2 lesion in the lower thoracic cord. The second developed ITM at age 50 years with a nadir of sensory loss from T6 down and paraparesis in the legs, associated with an MRI lesion at T6. She also made a partial recovery with treatment. Both sisters are homozygous for a missense variant in VPS37A (c.700C>A, p.Leu234Ile) identified by WES. We performed targeted sequencing of VPS37A in an additional 86 samples from patients with ITM and 175 with other diseases to investigate the p.Leu234Ile variant. We identified another patient with ITM homozygous for the same rare variant. No patients with multiple sclerosis, neuromyelitis optica, other neurologic conditions, or any healthy controls in public databases were homozygous for this variant. Conclusions A rare missense variant in VPS37A may predispose to development of ITM. Further studies are necessary to determine the frequency of this variant in the patient population and the mechanism through which it contributes to the risk of disease.
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Affiliation(s)
- Maureen A Mealy
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Tai-Seung Nam
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Santiago J Pardo
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Carlos A Pardo
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Nara L Sobreira
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Dimitrios Avramopoulos
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - David Valle
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Kathleen H Burns
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
| | - Michael Levy
- Department of Neurology (M.A.M., S.J.P., C.A.P., M.L.), Institute of Genetic Medicine (N.L.S., D.A., D.V., K.H.B.), and Department of Pathology (K.H.B.), Johns Hopkins University, Baltimore, MD; and Department of Neurology (T.-S.N.), Chonnam National University Medical School, Gwangju, South Korea
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14
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15
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Szymanska E, Budick-Harmelin N, Miaczynska M. Endosomal "sort" of signaling control: The role of ESCRT machinery in regulation of receptor-mediated signaling pathways. Semin Cell Dev Biol 2017; 74:11-20. [PMID: 28797837 DOI: 10.1016/j.semcdb.2017.08.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 07/24/2017] [Accepted: 08/04/2017] [Indexed: 12/31/2022]
Abstract
The endosomal sorting complexes required for transport (ESCRTs) machinery consists of four protein assemblies (ESCRT-0 to -III subcomplexes) which mediate various processes of membrane remodeling in the cell. In the endocytic pathway, ESCRTs sort cargo destined for degradation into intraluminal vesicles (ILVs) of endosomes. Cargos targeted by ESCRTs include various signaling molecules, mainly internalized cell-surface receptors but also some cytosolic proteins. It is therefore expected that aberrant trafficking caused by ESCRT dysfunction affects different signaling pathways. Here we review how perturbation of ESCRT activity alters intracellular transport of membrane receptors, causing their accumulation on endocytic compartments, decreased degradation and/or altered recycling to the plasma membrane. We further describe how perturbed trafficking of receptors impacts the activity of their downstream signaling pathways, with or without changes in transcriptional responses. Finally, we present evidence that ESCRT components can also control activity and intracellular distribution of cytosolic signaling proteins (kinases, other effectors and soluble receptors). The underlying mechanisms involve sequestration of such proteins in ILVs, their sorting for degradation or towards non-lysosomal destinations, and regulating their availability in various cellular compartments. All these ESCRT-mediated processes can modulate final outputs of multiple signaling pathways.
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Affiliation(s)
- Ewelina Szymanska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Noga Budick-Harmelin
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland; Cell Research and Immunology Department, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
| | - Marta Miaczynska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland.
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16
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Role of ESCRT component HD-PTP/ PTPN23 in cancer. Biochem Soc Trans 2017; 45:845-854. [PMID: 28620046 DOI: 10.1042/bst20160332] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/29/2017] [Accepted: 04/07/2017] [Indexed: 12/11/2022]
Abstract
Sustained cellular signalling originated from the receptors located at the plasma membrane is widely associated with cancer susceptibility. Endosomal sorting and degradation of the cell surface receptors is therefore crucial to preventing chronic downstream signalling and tumorigenesis. Since the Endosomal Sorting Complexes Required for Transport (ESCRT) controls these processes, ESCRT components were proposed to act as tumour suppressor genes. However, the bona fide role of ESCRT components in tumorigenesis has not been clearly demonstrated. The ESCRT member HD-PTP/PTPN23 was recently identified as a novel haplo-insufficient tumour suppressor in vitro and in vivo, in mice and humans. In this mini-review, we outline the role of the ESCRT components in cancer and summarize the functions of HD-PTP/PTPN23 in tumorigenesis.
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17
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Imbert PR, Louche A, Luizet JB, Grandjean T, Bigot S, Wood TE, Gagné S, Blanco A, Wunderley L, Terradot L, Woodman P, Garvis S, Filloux A, Guery B, Salcedo SP. A Pseudomonas aeruginosa TIR effector mediates immune evasion by targeting UBAP1 and TLR adaptors. EMBO J 2017; 36:1869-1887. [PMID: 28483816 PMCID: PMC5494471 DOI: 10.15252/embj.201695343] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 03/29/2017] [Accepted: 04/05/2017] [Indexed: 12/11/2022] Open
Abstract
Bacterial pathogens often subvert the innate immune system to establish a successful infection. The direct inhibition of downstream components of innate immune pathways is particularly well documented but how bacteria interfere with receptor proximal events is far less well understood. Here, we describe a Toll/interleukin 1 receptor (TIR) domain‐containing protein (PumA) of the multi‐drug resistant Pseudomonas aeruginosa PA7 strain. We found that PumA is essential for virulence and inhibits NF‐κB, a property transferable to non‐PumA strain PA14, suggesting no additional factors are needed for PumA function. The TIR domain is able to interact with the Toll‐like receptor (TLR) adaptors TIRAP and MyD88, as well as the ubiquitin‐associated protein 1 (UBAP1), a component of the endosomal‐sorting complex required for transport I (ESCRT‐I). These interactions are not spatially exclusive as we show UBAP1 can associate with MyD88, enhancing its plasma membrane localization. Combined targeting of UBAP1 and TLR adaptors by PumA impedes both cytokine and TLR receptor signalling, highlighting a novel strategy for innate immune evasion.
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Affiliation(s)
- Paul Rc Imbert
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Arthur Louche
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Jean-Baptiste Luizet
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Teddy Grandjean
- EA 7366 Recherche Translationelle Relations Hôte-Pathogènes, Faculté de Médecine Pôle Recherche, Université Lille 2, Lille, France
| | - Sarah Bigot
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Thomas E Wood
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Stéphanie Gagné
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Amandine Blanco
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Lydia Wunderley
- School of Biological Sciences, Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre, Manchester, UK†
| | - Laurent Terradot
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
| | - Philip Woodman
- School of Biological Sciences, Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre, Manchester, UK†
| | - Steve Garvis
- Laboratoire de Biologie et Modelisation, Ecole Normal Supérieur, UMR5239, Lyon, France
| | - Alain Filloux
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Benoit Guery
- EA 7366 Recherche Translationelle Relations Hôte-Pathogènes, Faculté de Médecine Pôle Recherche, Université Lille 2, Lille, France
| | - Suzana P Salcedo
- Laboratory of Molecular Microbiology and Structural Biochemistry, Centre National de la Recherche Scientifique, University of Lyon, Lyon, France
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18
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Gahloth D, Levy C, Heaven G, Stefani F, Wunderley L, Mould P, Cliff MJ, Bella J, Fielding AJ, Woodman P, Tabernero L. Structural Basis for Selective Interaction between the ESCRT Regulator HD-PTP and UBAP1. Structure 2016; 24:2115-2126. [PMID: 27839950 PMCID: PMC5145805 DOI: 10.1016/j.str.2016.10.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/27/2016] [Accepted: 10/12/2016] [Indexed: 01/21/2023]
Abstract
Endosomal sorting complexes required for transport (ESCRTs) are essential for ubiquitin-dependent degradation of mitogenic receptors, a process often compromised in cancer pathologies. Sorting of ubiquinated receptors via ESCRTs is controlled by the tumor suppressor phosphatase HD-PTP. The specific interaction between HD-PTP and the ESCRT-I subunit UBAP1 is critical for degradation of growth factor receptors and integrins. Here, we present the structural characterization by X-ray crystallography and double electron-electron resonance spectroscopy of the coiled-coil domain of HD-PTP and its complex with UBAP1. The coiled-coil domain adopts an unexpected open and rigid conformation that contrasts with the closed and flexible coiled-coil domain of the related ESCRT regulator Alix. The HD-PTP:UBAP1 structure identifies the molecular determinants of the interaction and provides a molecular basis for the specific functional cooperation between HD-PTP and UBAP1. Our findings provide insights into the molecular mechanisms of regulation of ESCRT pathways that could be relevant to anticancer therapies.
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Affiliation(s)
- Deepankar Gahloth
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Colin Levy
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Graham Heaven
- School of Chemistry and Photon Science Institute, University of Manchester, Manchester M13 9PT, UK
| | - Flavia Stefani
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Lydia Wunderley
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Paul Mould
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Matthew J Cliff
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Jordi Bella
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
| | - Alistair J Fielding
- School of Chemistry and Photon Science Institute, University of Manchester, Manchester M13 9PT, UK
| | - Philip Woodman
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK.
| | - Lydia Tabernero
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK.
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19
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Maki M, Takahara T, Shibata H. Multifaceted Roles of ALG-2 in Ca(2+)-Regulated Membrane Trafficking. Int J Mol Sci 2016; 17:ijms17091401. [PMID: 27571067 PMCID: PMC5037681 DOI: 10.3390/ijms17091401] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/18/2016] [Accepted: 08/19/2016] [Indexed: 12/15/2022] Open
Abstract
ALG-2 (gene name: PDCD6) is a penta-EF-hand Ca2+-binding protein and interacts with a variety of proteins in a Ca2+-dependent fashion. ALG-2 recognizes different types of identified motifs in Pro-rich regions by using different hydrophobic pockets, but other unknown modes of binding are also used for non-Pro-rich proteins. Most ALG-2-interacting proteins associate directly or indirectly with the plasma membrane or organelle membranes involving the endosomal sorting complex required for transport (ESCRT) system, coat protein complex II (COPII)-dependent ER-to-Golgi vesicular transport, and signal transduction from membrane receptors to downstream players. Binding of ALG-2 to targets may induce conformational change of the proteins. The ALG-2 dimer may also function as a Ca2+-dependent adaptor to bridge different partners and connect the subnetwork of interacting proteins.
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Affiliation(s)
- Masatoshi Maki
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
| | - Terunao Takahara
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
| | - Hideki Shibata
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
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20
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Kharitidi D, Apaja PM, Manteghi S, Suzuki K, Malitskaya E, Roldan A, Gingras MC, Takagi J, Lukacs GL, Pause A. Interplay of Endosomal pH and Ligand Occupancy in Integrin α5β1 Ubiquitination, Endocytic Sorting, and Cell Migration. Cell Rep 2015; 13:599-609. [PMID: 26456826 DOI: 10.1016/j.celrep.2015.09.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 07/30/2015] [Accepted: 09/04/2015] [Indexed: 01/18/2023] Open
Abstract
Membrane trafficking of integrins plays a pivotal role in cell proliferation and migration. How endocytosed integrins are targeted either for recycling or lysosomal delivery is not fully understood. Here, we show that fibronectin (FN) binding to α5β1 integrin triggers ubiquitination and internalization of the receptor complex. Acidification facilitates FN dissociation from integrin α5β1 in vitro and in early endosomes, promoting receptor complex deubiquitination by the USP9x and recycling to the cell surface. Depending on residual ligand occupancy of receptors, some α5β1 integrins remain ubiquitinated and are captured by ESCRT-0/I, containing histidine domain-containing protein tyrosine phosphatase (HD-PTP) and ubiquitin-associated protein 1 (UBAP1), and are directed for lysosomal proteolysis, limiting receptor downstream signaling and cell migration. Thus, HD-PTP or UBAP1 depletion confers a pro-invasive phenotype. Thus, pH-dependent FN-integrin dissociation and deubiquitination of the activated integrin α5β1 are required for receptor resensitization and cell migration, representing potential targets to modulate tumor invasiveness.
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Affiliation(s)
- Dmitri Kharitidi
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6
| | - Pirjo M Apaja
- Department of Physiology and Research Group Focused on Protein Structure, McGill University, Montreal, Canada, H3G 1Y6
| | - Sanaz Manteghi
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6
| | - Kei Suzuki
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Elena Malitskaya
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6
| | - Ariel Roldan
- Department of Physiology and Research Group Focused on Protein Structure, McGill University, Montreal, Canada, H3G 1Y6
| | - Marie-Claude Gingras
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6
| | - Junichi Takagi
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Gergely L Lukacs
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6; Department of Physiology and Research Group Focused on Protein Structure, McGill University, Montreal, Canada, H3G 1Y6.
| | - Arnim Pause
- Department of Biochemistry, Goodman Cancer Research Centre, McGill University, Montreal, Canada, H3G 1Y6.
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van Blitterswijk M, Mullen B, Wojtas A, Heckman MG, Diehl NN, Baker MC, DeJesus-Hernandez M, Brown PH, Murray ME, Hsiung GYR, Stewart H, Karydas AM, Finger E, Kertesz A, Bigio EH, Weintraub S, Mesulam M, Hatanpaa KJ, White CL, Neumann M, Strong MJ, Beach TG, Wszolek ZK, Lippa C, Caselli R, Petrucelli L, Josephs KA, Parisi JE, Knopman DS, Petersen RC, Mackenzie IR, Seeley WW, Grinberg LT, Miller BL, Boylan KB, Graff-Radford NR, Boeve BF, Dickson DW, Rademakers R. Genetic modifiers in carriers of repeat expansions in the C9ORF72 gene. Mol Neurodegener 2014; 9:38. [PMID: 25239657 PMCID: PMC4190282 DOI: 10.1186/1750-1326-9-38] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 08/29/2014] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Hexanucleotide repeat expansions in chromosome 9 open reading frame 72 (C9ORF72) are causative for frontotemporal dementia (FTD) and motor neuron disease (MND). Substantial phenotypic heterogeneity has been described in patients with these expansions. We set out to identify genetic modifiers of disease risk, age at onset, and survival after onset that may contribute to this clinical variability. RESULTS We examined a cohort of 330 C9ORF72 expansion carriers and 374 controls. In these individuals, we assessed variants previously implicated in FTD and/or MND; 36 variants were included in our analysis. After adjustment for multiple testing, our analysis revealed three variants significantly associated with age at onset (rs7018487 [UBAP1; p-value = 0.003], rs6052771 [PRNP; p-value = 0.003], and rs7403881 [MT-Ie; p-value = 0.003]), and six variants significantly associated with survival after onset (rs5848 [GRN; p-value = 0.001], rs7403881 [MT-Ie; p-value = 0.001], rs13268953 [ELP3; p-value = 0.003], the epsilon 4 allele [APOE; p-value = 0.004], rs12608932 [UNC13A; p-value = 0.003], and rs1800435 [ALAD; p-value = 0.003]). CONCLUSIONS Variants identified through this study were previously reported to be involved in FTD and/or MND, but we are the first to describe their effects as potential disease modifiers in the presence of a clear pathogenic mutation (i.e. C9ORF72 repeat expansion). Although validation of our findings is necessary, these variants highlight the importance of protein degradation, antioxidant defense and RNA-processing pathways, and additionally, they are promising targets for the development of therapeutic strategies and prognostic tests.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Rosa Rademakers
- Department of Neuroscience, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL 32224, USA.
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