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Cao B, Dahlen JV, Sen M, Beyer T, Leonhard T, Kilger E, Arango-Gonzalez B, Ueffing M. Mutant dominant-negative rhodopsin∆I256 causes protein aggregates degraded via ERAD and prevents normal rhodopsin from proper membrane trafficking. Front Mol Biosci 2024; 11:1369000. [PMID: 38828393 PMCID: PMC11140085 DOI: 10.3389/fmolb.2024.1369000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/23/2024] [Indexed: 06/05/2024] Open
Abstract
Dominant mutations in the rhodopsin gene (Rho) contribute to 25% of autosomal dominant retinitis pigmentosa (adRP), characterized by photoreceptor loss and progressive blindness. One such mutation, Rho ∆I256 , carries a 3-bp deletion, resulting in the loss of one of two isoleucines at codons 255 and 256. Our investigation, using recombinant expression in HEK293 and COS-7 cells, revealed that Rho ∆I256, akin to the known adRP mutation Rho P23H, induces the formation of rhodopsin protein (RHO) aggregates at the perinuclear region. Co-expression of Rho ∆I256 or Rho P23H with wild-type Rho WT, mimicking the heterozygous genotype of adRP patients, demonstrated the dominant-negative effect, as all isoforms were retained in perinuclear aggregates, impeding membrane trafficking. In retinal explants from WT mice, mislocalization of labeled adRP isoforms at the outer nuclear layer was observed. Further analysis revealed that RHO∆I256 aggregates are retained at the endoplasmic reticulum (ER), undergo ER-associated degradation (ERAD), and colocalize with the AAA-ATPase escort chaperone valosin-containing protein (VCP). These aggregates are polyubiquitinated and partially colocalized with the 20S proteasome subunit beta-5 (PSMB5). Pharmacological inhibition of proteasome- or VCP activity increased RHO∆I256 aggregate size. In summary, RHO∆I256 exhibits dominant pathogenicity by sequestering normal RHOWT in ER aggregates, preventing its membrane trafficking and following the ERAD degradation.
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Affiliation(s)
- Bowen Cao
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
- Graduate Training Centre of Neuroscience, University of Tübingen, Tuebingen, Germany
| | - Johanna Valentina Dahlen
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
| | - Merve Sen
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
- Graduate Training Centre of Neuroscience, University of Tübingen, Tuebingen, Germany
| | - Tina Beyer
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
| | - Tobias Leonhard
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
| | - Ellen Kilger
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
| | - Blanca Arango-Gonzalez
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
| | - Marius Ueffing
- Centre for Ophthalmology, Institute for Ophthalmic Research, University of Tübingen, Tuebingen, Germany
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Le Clorennec C, Subramonian D, Huo Y, Zage PE. UBE4B interacts with the ITCH E3 ubiquitin ligase to induce Ku70 and c-FLIPL polyubiquitination and enhanced neuroblastoma apoptosis. Cell Death Dis 2023; 14:739. [PMID: 37957138 PMCID: PMC10643674 DOI: 10.1038/s41419-023-06252-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 10/22/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023]
Abstract
Expression of the UBE4B ubiquitin ligase is strongly associated with neuroblastoma patient outcomes, but the functional roles of UBE4B in neuroblastoma pathogenesis are not known. We evaluated interactions of UBE4B with the E3 ubiquitin ligase ITCH/AIP4 and the effects of UBE4B expression on Ku70 and c-FLIPL ubiquitination and proteasomal degradation by co-immunoprecipitation and Western blots. We also evaluated the role of UBE4B in apoptosis induced by histone deacetylase (HDAC) inhibition using Western blots. UBE4B binding to ITCH was mediated by WW domains in the ITCH protein. ITCH activation led to ITCH-UBE4B complex formation and recruitment of Ku70 and c-FLIPL via ITCH WW domains, followed by Ku70 and c-FLIPL Lys48/Lys63 branched polyubiquitination and proteasomal degradation. HDAC inhibition induced Ku70 acetylation, leading to release of c-FLIPL and Bax from Ku70, increased Ku70 and c-FLIPL Lys48/Lys63 branched polyubiquitination via the ITCH-UBE4B complex, and induction of apoptosis. UBE4B depletion led to reduced polyubiquitination and increased levels of Ku70 and c-FLIPL and to reduced apoptosis induced by HDAC inhibition via stabilization of c-FLIPL and Ku70 and inhibition of caspase 8 activation. Our results have identified novel interactions and novel targets for UBE4B ubiquitin ligase activity and a direct role for the ITCH-UBE4B complex in responses of neuroblastoma cells to HDAC inhibition, suggesting that the ITCH-UBE4B complex plays a critical role in responses of neuroblastoma to therapy and identifying a potential mechanism underlying the association of UBE4B expression with neuroblastoma patient outcomes.
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Affiliation(s)
- Christophe Le Clorennec
- Department of Pediatrics, Division of Hematology-Oncology, University of California San Diego, La Jolla, CA, USA
| | - Divya Subramonian
- Department of Pediatrics, Division of Hematology-Oncology, University of California San Diego, La Jolla, CA, USA
| | - Yuchen Huo
- Department of Pediatrics, Division of Hematology-Oncology, University of California San Diego, La Jolla, CA, USA
| | - Peter E Zage
- Department of Pediatrics, Division of Hematology-Oncology, University of California San Diego, La Jolla, CA, USA.
- Peckham Center for Cancer and Blood Disorders, Rady Children's Hospital, San Diego, CA, USA.
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3
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Rao B, Wang Q, Yao D, Xia Y, Li W, Xie Y, Li S, Cao M, Shen Y, Qin A, Zhao J, Cao Y. The cryo-EM structure of the human ERAD retrotranslocation complex. SCIENCE ADVANCES 2023; 9:eadi5656. [PMID: 37831771 PMCID: PMC10575581 DOI: 10.1126/sciadv.adi5656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/12/2023] [Indexed: 10/15/2023]
Abstract
Endoplasmic reticulum-associated degradation (ERAD) maintains protein homeostasis by retrieving misfolded proteins from the endoplasmic reticulum (ER) lumen into the cytosol for degradation. The retrotranslocation of misfolded proteins across the ER membrane is an energy-consuming process, with the detailed transportation mechanism still needing clarification. We determined the cryo-EM structures of the hetero-decameric complex formed by the Derlin-1 tetramer and the p97 hexamer. It showed an intriguing asymmetric complex and a putative coordinated squeezing movement in Derlin-1 and p97 parts. With the conformational changes of p97 induced by its ATP hydrolysis activities, the Derlin-1 channel could be torn into a "U" shape with a large opening to the lipidic environment, thereby forming an entry for the substrates in the ER membrane. The EM analysis showed that p97 formed a functional protein complex with Derlin-1, revealing the coupling mechanism between the ERAD retrotranslocation and the ATP hydrolysis activities.
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Affiliation(s)
- Bing Rao
- Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Qian Wang
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - Deqiang Yao
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
- State Key Laboratory of Oncogenes and Related Genes, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Ying Xia
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - Wenguo Li
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - Yuming Xie
- College of Basic Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Shaobai Li
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - Mi Cao
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - Yafeng Shen
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
| | - An Qin
- Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
- Department of Orthopaedics, Shanghai Frontiers Science Center of Degeneration and Regeneration in Skeletal System, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Jie Zhao
- Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
- Department of Orthopaedics, Shanghai Frontiers Science Center of Degeneration and Regeneration in Skeletal System, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Yu Cao
- Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
- Shanghai Institute of Precision Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 115 Jinzun Road, Shanghai 200125, China
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Wan Y, Wang Q, Zheng Y, Yu M, Xie Z, Ling C, Meng L, Yu J, Zheng Y, Wang Y, Zhang W, Liu C, Zhao Y, Yuan Y, Deng J, Gang Q, Wang Z. Novel variants, muscle imaging, and myopathological changes in Chinese patients with
VCP
‐related multisystem proteinopathy. Mol Genet Genomic Med 2023:e2176. [DOI: 10.1002/mgg3.2176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/12/2023] [Accepted: 03/15/2023] [Indexed: 04/03/2023] Open
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5
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Wang X, Wen T, Miao H, Hu W, Lei M, Zhu Y. Discovery of a new class of valosine containing protein (VCP/P97) inhibitors for the treatment of colorectal cancer. Bioorg Med Chem 2022; 74:117050. [DOI: 10.1016/j.bmc.2022.117050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/25/2022] [Accepted: 10/04/2022] [Indexed: 11/02/2022]
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6
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Ferrari V, Cristofani R, Cicardi ME, Tedesco B, Crippa V, Chierichetti M, Casarotto E, Cozzi M, Mina F, Galbiati M, Piccolella M, Carra S, Vaccari T, Nalbandian A, Kimonis V, Fortuna TR, Pandey UB, Gagliani MC, Cortese K, Rusmini P, Poletti A. Pathogenic variants of Valosin-containing protein induce lysosomal damage and transcriptional activation of autophagy regulators in neuronal cells. Neuropathol Appl Neurobiol 2022; 48:e12818. [PMID: 35501124 PMCID: PMC10588520 DOI: 10.1111/nan.12818] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 04/14/2022] [Accepted: 04/28/2022] [Indexed: 11/28/2022]
Abstract
AIM Mutations in the valosin-containing protein (VCP) gene cause various lethal proteinopathies that mainly include inclusion body myopathy with Paget's disease of bone and frontotemporal dementia (IBMPFD) and amyotrophic lateral sclerosis (ALS). Different pathological mechanisms have been proposed. Here, we define the impact of VCP mutants on lysosomes and how cellular homeostasis is restored by inducing autophagy in the presence of lysosomal damage. METHODS By electron microscopy, we studied lysosomal morphology in VCP animal and motoneuronal models. With the use of western blotting, real-time quantitative polymerase chain reaction (RT-qPCR), immunofluorescence and filter trap assay, we evaluated the effect of selected VCP mutants in neuronal cells on lysosome size and activity, lysosomal membrane permeabilization and their impact on autophagy. RESULTS We found that VCP mutants induce the formation of aberrant multilamellar organelles in VCP animal and cell models similar to those found in patients with VCP mutations or with lysosomal storage disorders. In neuronal cells, we found altered lysosomal activity characterised by membrane permeabilization with galectin-3 redistribution and activation of PPP3CB. This selectively activated the autophagy/lysosomal transcriptional regulator TFE3, but not TFEB, and enhanced both SQSTM1/p62 and lipidated MAP1LC3B levels inducing autophagy. Moreover, we found that wild type VCP, but not the mutants, counteracted lysosomal damage induced either by trehalose or by a mutant form of SOD1 (G93A), also blocking the formation of its insoluble intracellular aggregates. Thus, chronic activation of autophagy might fuel the formation of multilamellar bodies. CONCLUSION Together, our findings provide insights into the pathogenesis of VCP-related diseases, by proposing a novel mechanism of multilamellar body formation induced by VCP mutants that involves lysosomal damage and induction of lysophagy.
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Affiliation(s)
- Veronica Ferrari
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Riccardo Cristofani
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Maria E. Cicardi
- Department of Neuroscience, Weinberg ALS Center, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University, Philadelphia, PA, USA
| | - Barbara Tedesco
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS – Istituto Neurologico Carlo Besta, Milan, Italy
| | - Valeria Crippa
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Marta Chierichetti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Elena Casarotto
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Marta Cozzi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Francesco Mina
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Mariarita Galbiati
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Margherita Piccolella
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Serena Carra
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Thomas Vaccari
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy
| | | | - Virginia Kimonis
- Department of Pediatrics, University of California, Irvine, CA, USA
| | - Tyler R. Fortuna
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Udai B. Pandey
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Maria C. Gagliani
- Department of Experimental Medicine (DIMES), Cellular Electron Microscopy Lab, University of Genoa, Genova
| | - Katia Cortese
- Department of Experimental Medicine (DIMES), Cellular Electron Microscopy Lab, University of Genoa, Genova
| | - Paola Rusmini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
| | - Angelo Poletti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Centre of Excellence on Neurodegenerative Diseases, Università degli Studi di Milano, Milan
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7
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Ferrari V, Cristofani R, Tedesco B, Crippa V, Chierichetti M, Casarotto E, Cozzi M, Mina F, Piccolella M, Galbiati M, Rusmini P, Poletti A. Valosin Containing Protein (VCP): A Multistep Regulator of Autophagy. Int J Mol Sci 2022; 23:ijms23041939. [PMID: 35216053 PMCID: PMC8878954 DOI: 10.3390/ijms23041939] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/03/2022] [Accepted: 02/06/2022] [Indexed: 02/04/2023] Open
Abstract
Valosin containing protein (VCP) has emerged as a central protein in the regulation of the protein quality control (PQC) system. VCP mutations are causative of multisystem proteinopathies, which include neurodegenerative diseases (NDs), and share various signs of altered proteostasis, mainly associated with autophagy malfunctioning. Autophagy is a complex multistep degradative system essential for the maintenance of cell viability, especially in post-mitotic cells as neurons and differentiated skeletal muscle cells. Interestingly, many studies concerning NDs have focused on autophagy impairment as a pathological mechanism or autophagy activity boosting to rescue the pathological phenotype. The role of VCP in autophagy has been widely debated, but recent findings have defined new mechanisms associated with VCP activity in the regulation of autophagy, showing that VCP is involved in different steps of this pathway. Here we will discuss the multiple activity of VCP in the autophagic pathway underlying its leading role either in physiological or pathological conditions. A better understanding of VCP complexes and mechanisms in regulating autophagy could define the altered mechanisms by which VCP directly or indirectly causes or modulates different human diseases and revealing possible new therapeutic approaches for NDs.
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Affiliation(s)
- Veronica Ferrari
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Riccardo Cristofani
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Barbara Tedesco
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS—Istituto Neurologico Carlo Besta, Via Celoria 11, 20133 Milan, Italy;
| | - Valeria Crippa
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Marta Chierichetti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Elena Casarotto
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Marta Cozzi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Francesco Mina
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Margherita Piccolella
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Mariarita Galbiati
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Paola Rusmini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
| | - Angelo Poletti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133 Milan, Italy; (V.F.); (R.C.); (V.C.); (M.C.); (E.C.); (M.C.); (F.M.); (M.P.); (M.G.); (P.R.)
- Correspondence:
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8
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De Marco G, Lomartire A, Manera U, Canosa A, Grassano M, Casale F, Fuda G, Salamone P, Rinaudo MT, Colombatto S, Moglia C, Chiò A, Calvo A. Effects of intracellular calcium accumulation on proteins encoded by the major genes underlying amyotrophic lateral sclerosis. Sci Rep 2022; 12:395. [PMID: 35013445 PMCID: PMC8748718 DOI: 10.1038/s41598-021-04267-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 12/16/2021] [Indexed: 12/12/2022] Open
Abstract
The aetiology of Amyotrophic Lateral Sclerosis (ALS) is still poorly understood. The discovery of genetic forms of ALS pointed out the mechanisms underlying this pathology, but also showed how complex these mechanisms are. Excitotoxicity is strongly suspected to play a role in ALS pathogenesis. Excitotoxicity is defined as neuron damage due to excessive intake of calcium ions (Ca2+) by the cell. This study aims to find a relationship between the proteins coded by the most relevant genes associated with ALS and intracellular Ca2+ accumulation. In detail, the profile of eight proteins (TDP-43, C9orf72, p62/sequestosome-1, matrin-3, VCP, FUS, SOD1 and profilin-1), was analysed in three different cell types induced to raise their cytoplasmic amount of Ca2+. Intracellular Ca2+ accumulation causes a decrease in the levels of TDP-43, C9orf72, matrin3, VCP, FUS, SOD1 and profilin-1 and an increase in those of p62/sequestosome-1. These events are associated with the proteolytic action of two proteases, calpains and caspases, as well as with the activation of autophagy. Interestingly, Ca2+ appears to both favour and hinder autophagy. Understanding how and why calpain-mediated proteolysis and autophagy, which are physiological processes, become pathological may elucidate the mechanisms responsible for ALS and help discover new therapeutic targets.
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Affiliation(s)
- Giovanni De Marco
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy. .,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy.
| | - Annarosa Lomartire
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy
| | - Umberto Manera
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy
| | - Antonio Canosa
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy.,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy
| | - Maurizio Grassano
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy
| | - Federico Casale
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy
| | - Giuseppe Fuda
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy
| | - Paolina Salamone
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy.,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy
| | - Maria Teresa Rinaudo
- Department of Oncology, University of Turin, via Michelangelo 27/b, 10126, Turin, Italy
| | - Sebastiano Colombatto
- Department of Oncology, University of Turin, via Michelangelo 27/b, 10126, Turin, Italy
| | - Cristina Moglia
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy.,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy
| | - Adriano Chiò
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy.,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy.,Neuroscience Institute of Turin (NIT), Via Verdi, 8, 10124, Turin, Italy.,Institute of Cognitive Sciences and Technologies, C.N.R., Via S. Martino della Battaglia, 44, 00185, Rome, Italy
| | - Andrea Calvo
- Department of Neuroscience, ALS Centre, "Rita Levi Montalcini", University of Turin, Via Cherasco 15, 10126, Turin, Italy.,Neurology Unit 1, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Via Cherasco 15, 10126, Turin, Italy.,Neuroscience Institute of Turin (NIT), Via Verdi, 8, 10124, Turin, Italy
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9
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Bruno F, Conidi ME, Puccio G, Frangipane F, Laganà V, Bernardi L, Smirne N, Mirabelli M, Colao R, Curcio S, Di Lorenzo R, Maletta R, Bruni AC. A Novel Mutation (D395A) in Valosin-Containing Protein Gene Is Associated With Early Onset Frontotemporal Dementia in an Italian Family. Front Genet 2021; 12:795029. [PMID: 34917136 PMCID: PMC8669739 DOI: 10.3389/fgene.2021.795029] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
Inclusion body myopathy (IBM) with Paget's disease of bone (PDB) and/or frontotemporal dementia (FTD) (IBMPFD) was recently identified as rare autosomal dominant disorder due to mutations in VCP gene. However, VCP mutations have also been documented in patients with amyotrophic lateral sclerosis (ALS), Charcot-Marie-Tooth type 2 (CMT2) disease, and hereditary spastic paraplegia (HSP), underlining the heterogeneity of the phenotypes due to VCP mutations. In this study, we reported a novel missense heterozygous variant c.1184A > C (p.D395A) in exon 10 of VCP gene identified in three patients (two sisters and one brother) belonging to an Italian family. The patients underwent a detailed clinical evaluation including medical history, neurological examination, and neuropsychological assessment. Brain's morphologic and functional analysis was also performed. The whole picture was consistent with the criteria of behavioral variant frontotemporal dementia (bvFTD) without IBM and PBD. Our report confirms the high degree of heterogeneity of VCP disease. A VCP analysis should be considered for the genetic screening of familial bvFTD with an early onset also in absence of IBM or PDB signs.
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Affiliation(s)
- Francesco Bruno
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Maria Elena Conidi
- Laboratorio Analisi Dell'Ospedale G. Jazzolino-ASP Vibo Valentia (RC), Reggio Calabria, Italy
| | - Gianfranco Puccio
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Francesca Frangipane
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Valentina Laganà
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Livia Bernardi
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Nicoletta Smirne
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Maria Mirabelli
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Rosanna Colao
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Sabrina Curcio
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Raffaele Di Lorenzo
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Raffaele Maletta
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
| | - Amalia Cecilia Bruni
- Regional Neurogenetic Centre (CRN), Department of Primary Care, ASP Catanzaro, Lamezia Terme, Italy
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10
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Pharmacological Inhibition of the VCP/Proteasome Axis Rescues Photoreceptor Degeneration in RHO P23H Rat Retinal Explants. Biomolecules 2021; 11:biom11101528. [PMID: 34680161 PMCID: PMC8534135 DOI: 10.3390/biom11101528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/02/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022] Open
Abstract
Rhodopsin (RHO) misfolding mutations are a common cause of the blinding disease autosomal dominant retinitis pigmentosa (adRP). The most prevalent mutation, RHOP23H, results in its misfolding and retention in the endoplasmic reticulum (ER). Under homeostatic conditions, misfolded proteins are selectively identified, retained at the ER, and cleared via ER-associated degradation (ERAD). Overload of these degradation processes for a prolonged period leads to imbalanced proteostasis and may eventually result in cell death. ERAD of misfolded proteins, such as RHOP23H, includes the subsequent steps of protein recognition, targeting for ERAD, retrotranslocation, and proteasomal degradation. In the present study, we investigated and compared pharmacological modulation of ERAD at these four different major steps. We show that inhibition of the VCP/proteasome activity favors cell survival and suppresses P23H-mediated retinal degeneration in RHOP23H rat retinal explants. We suggest targeting this activity as a therapeutic approach for patients with currently untreatable adRP.
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11
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Zhang G, Li S, Cheng KW, Chou TF. AAA ATPases as therapeutic targets: Structure, functions, and small-molecule inhibitors. Eur J Med Chem 2021; 219:113446. [PMID: 33873056 PMCID: PMC8165034 DOI: 10.1016/j.ejmech.2021.113446] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/21/2021] [Accepted: 03/30/2021] [Indexed: 01/07/2023]
Abstract
ATPases Associated with Diverse Cellular Activity (AAA ATPase) are essential enzymes found in all organisms. They are involved in various processes such as DNA replication, protein degradation, membrane fusion, microtubule serving, peroxisome biogenesis, signal transduction, and the regulation of gene expression. Due to the importance of AAA ATPases, several researchers identified and developed small-molecule inhibitors against these enzymes. We discuss six AAA ATPases that are potential drug targets and have well-developed inhibitors. We compare available structures that suggest significant differences of the ATP binding pockets among the AAA ATPases with or without ligand. The distances from ADP to the His20 in the His-Ser-His motif and the Arg finger (Arg353 or Arg378) in both RUVBL1/2 complex structures bound with or without ADP have significant differences, suggesting dramatically different interactions of the binding site with ADP. Taken together, the inhibitors of six well-studied AAA ATPases and their structural information suggest further development of specific AAA ATPase inhibitors due to difference in their structures. Future chemical biology coupled with proteomic approaches could be employed to develop variant specific, complex specific, and pathway specific inhibitors or activators for AAA ATPase proteins.
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Affiliation(s)
- Gang Zhang
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States.
| | - Shan Li
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States
| | - Kai-Wen Cheng
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States
| | - Tsui-Fen Chou
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, United States.
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12
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Wall JM, Basu A, Zunica ERM, Dubuisson OS, Pergola K, Broussard JP, Kirwan JP, Axelrod CL, Johnson AE. CRISPR/Cas9-engineered Drosophila knock-in models to study VCP diseases. Dis Model Mech 2021; 14:dmm048603. [PMID: 34160014 PMCID: PMC8325010 DOI: 10.1242/dmm.048603] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 06/11/2021] [Indexed: 01/08/2023] Open
Abstract
Mutations in Valosin Containing Protein (VCP) are associated with several degenerative diseases, including multisystem proteinopathy (MSP-1) and amyotrophic lateral sclerosis. However, patients with VCP mutations vary widely in their pathology and clinical penetrance, making it difficult to devise effective treatment strategies. A deeper understanding of how each mutation affects VCP function could enhance the prediction of clinical outcomes and design of personalized treatment options. The power of a genetically tractable model organism coupled with well-established in vivo assays and a relatively short life cycle make Drosophila an attractive system to study VCP disease pathogenesis. Using CRISPR/Cas9, we have generated individual Drosophila knock-in mutants that include nine hereditary VCP disease mutations. Our models display many hallmarks of VCP-mediated degeneration, including progressive decline in mobility, protein aggregate accumulation and defects in lysosomal and mitochondrial function. We also made some novel and unexpected findings, including nuclear morphology defects and sex-specific phenotypic differences in several mutants. Taken together, the Drosophila VCP disease models generated in this study will be useful for studying the etiology of individual VCP patient mutations and testing potential genetic and/or pharmacological therapies.
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Affiliation(s)
- Jordan M. Wall
- Louisiana State University, Department of Biological Sciences, Baton Rouge, LA 70803, USA
| | - Ankita Basu
- Louisiana State University, Department of Biological Sciences, Baton Rouge, LA 70803, USA
| | - Elizabeth R. M. Zunica
- Integrated Physiology and Molecular Medicine Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Olga S. Dubuisson
- Louisiana State University, Department of Biological Sciences, Baton Rouge, LA 70803, USA
| | - Kathryn Pergola
- Integrated Physiology and Molecular Medicine Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
- Department of Translational Services, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Joshua P. Broussard
- Louisiana State University, Department of Biological Sciences, Baton Rouge, LA 70803, USA
| | - John P. Kirwan
- Integrated Physiology and Molecular Medicine Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Christopher L. Axelrod
- Integrated Physiology and Molecular Medicine Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
- Department of Translational Services, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Alyssa E. Johnson
- Louisiana State University, Department of Biological Sciences, Baton Rouge, LA 70803, USA
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13
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Zhang Y, Xie X, Wang X, Wen T, Zhao C, Liu H, Zhao B, Zhu Y. Discovery of novel pyrimidine molecules containing boronic acid as VCP/p97 Inhibitors. Bioorg Med Chem 2021; 38:116114. [PMID: 33831696 DOI: 10.1016/j.bmc.2021.116114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/03/2021] [Accepted: 03/06/2021] [Indexed: 01/08/2023]
Abstract
Valine-containing protein (VCP) is a member of the adenosine triphosphate family involved in a variety of cellular activities. VCP/p97 is capable of maintaining protein homeostasis and mediating the degradation of misfolded polypeptides by the ubiquitin-proteasome system (UPS). In this manuscript, a series of novel p97 inhibitors with pyrimidine as core structure were designed, synthesized and biologically evaluated. Based on the enzymatic results, a detailed structure-activity relationship discussion of the synthesized compounds was carried out. Furthermore, cellular activities of the compounds with enzymatic potency of less than 200 nM were investigated by using A549 and RPMI8226 cell lines. Among the screened inhibitors, compound 17 (IC50, 54.7 nM) showed good enzymatic activity. Investigation of cellular activities with non-small cell lung cancer A549 and multiple myeloma (MM) RPMI8226 further confirmed the potency of 17 with the IC50 values of 2.80 μM and 0.86 μM, respectively. Compound 17 is now being developed as a candidate. Finally, docking studies were carried out to explore the possible binding mode between the active inhibitor 17 and p97.
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Affiliation(s)
- Yonglei Zhang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210023, PR China
| | - Xiaomin Xie
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210023, PR China
| | - Xueyuan Wang
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Tiantian Wen
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Chi Zhao
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Hailong Liu
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Bo Zhao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210023, PR China.
| | - Yongqiang Zhu
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China.
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14
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Wu R, Wei Z, Zhang L. Structural insight into mutations at 155 position of valosin containing protein (VCP) linked to inclusion body myopathy with Paget disease of bone and frontotemporal Dementia. Saudi J Biol Sci 2021; 28:2128-2138. [PMID: 33911929 PMCID: PMC8071901 DOI: 10.1016/j.sjbs.2021.02.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 10/31/2022] Open
Abstract
Mutations in Valosin-containing protein (VCP) have been implicated in the pathology linked to inclusion body myopathy, paget disease of bone and frontotemporal dementia (IBMPFD). VCP is an essential component of AAA-ATPase superfamily involved in various cellular functions. Advanced In-silico analysis was performed using prediction based servers to determine the most deleterious mutation. Molecular dynamics simulation was used to study the protein dynamics at atomic level. Molecular docking was used to study the effect of mutation on ATP/ADP transition in the kinase domain. This ATPase of 806 amino acids has four domains: N-terminal domain, C-terminal domain and two ATPase domains D1 and D2 and each of these domains have a distinct role in its functioning. The mutations in VCP protein are distributed among regions known as hotspots, one such hotspot is codon 155. Three missense mutations reported in this hotspot are R155C, R155H and R155P. Potentiality of the deleteriousness calculated using server based prediction models reveal R155C mutation to be the most deleterious. The atomic insight into the effect of mutation by molecular dynamics simulation revealed major conformational changes in R155C variants ATP binding site in D1 domain. The nucleotide-binding mode at the catalytic pocket of VCP and its three variants at codon 155 showed change in the structure, which affects the ATP-ADP transition kinetics in all the three variants.
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Affiliation(s)
- Rui Wu
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Zhijie Wei
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Li Zhang
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, China
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15
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Nakamura T, Kawarabayashi T, Koh K, Takiyama Y, Ikeda Y, Shoji M. Spastic Paraplegia with Paget's Disease of Bone due to a VCP Gene Mutation. Intern Med 2021; 60:141-144. [PMID: 32893227 PMCID: PMC7835475 DOI: 10.2169/internalmedicine.4617-20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Hereditary spastic paraplegia (HSP) is a neurodegenerative disorder clinically characterized by slowly progressing spastic paraparesis. We herein report a 50-year-old Japanese woman who presented with slowly progressing spastic paraplegia and a history of Paget's disease of bone (PDB). Genetic testing revealed a mutation of the Valosin-containing protein (VCP) gene (p.Arg155Cys; c.436C>T). This mutation has not been reported to cause HSP with PDB.
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Affiliation(s)
- Takumi Nakamura
- Department of Neurology, Gunma University Graduate School of Medicine, Japan
| | | | - Kishin Koh
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Japan
| | - Yoshihisa Takiyama
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Japan
| | - Yoshio Ikeda
- Department of Neurology, Gunma University Graduate School of Medicine, Japan
| | - Mikio Shoji
- Dementia Center, Geriatrics Research Institute Hospital, Japan
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16
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Pharmacophore modeling, atom-based 3D-QSAR and molecular docking studies on N-benzylpyrimidin-4-amine derivatives as VCP/p97 inhibitors. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02517-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Khong ZJ, Lai SK, Koh CG, Geifman-Shochat S, Li HY. A novel function of AAA-ATPase p97/VCP in the regulation of cell motility. Oncotarget 2020; 11:74-85. [PMID: 32002125 PMCID: PMC6967774 DOI: 10.18632/oncotarget.27419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 12/21/2019] [Indexed: 11/25/2022] Open
Abstract
High level of the multifunctional AAA-ATPase p97/VCP is often correlated to the development of cancer; however, the underlying mechanism is not understood completely. Here, we report a novel function of p97/VCP in actin regulation and cell motility. We found that loss of p97/VCP promotes stabilization of F-actin, which cannot be reversed by actin-destabilizing agent, Cytochalasin D. Live-cell imaging demonstrated reduced actin dynamics in p97/VCP-knockdown cells, leading to compromised cell motility. We further examined the underlying mechanism and found elevated RhoA protein levels along with increased phosphorylation of its downstream effectors, ROCK, LIMK, and MLC upon the knockdown of p97/VCP. Since p97/VCP is indispensable in the ubiquitination-dependent protein degradation pathway, we investigated if the loss of p97/VCP hinders the protein degradation of RhoA. Knockdown of p97/VCP resulted in a higher amount of ubiquitinated RhoA, suggesting p97/VCP involvement in the proteasome-dependent protein degradation pathway. Finally, we found that p97/VCP interacts with FBXL19, a molecular chaperone known to guide ubiquitinated RhoA for proteasomal degradation. Reduction of p97/VCP may result in the accumulation of RhoA which, in turn, enhances cytoplasmic F-actin formation. In summary, our study uncovered a novel function of p97/VCP in actin regulation and cell motility via the Rho-ROCK dependent pathway which provides fundamental insights into how p97/VCP is involved in cancer development.
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Affiliation(s)
- Zi-Jia Khong
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
| | - Soak-Kuan Lai
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
| | - Cheng-Gee Koh
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
| | - Susana Geifman-Shochat
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
| | - Hoi-Yeung Li
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
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18
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Wong TH, Pottier C, Hondius DC, Meeter LHH, van Rooij JGJ, Melhem S, van Minkelen R, van Duijn CM, Rozemuller AJM, Seelaar H, Rademakers R, van Swieten JC. Three VCP Mutations in Patients with Frontotemporal Dementia. J Alzheimers Dis 2019; 65:1139-1146. [PMID: 30103325 DOI: 10.3233/jad-180301] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Valosin-containing protein (VCP) is involved in multiple cellular activities. Mutations in VCP lead to heterogeneous clinical presentations including inclusion body myopathy with Paget's disease of the bone, frontotemporal dementia and amyotrophic lateral sclerosis, even in patients carrying the same mutation. We screened a cohort of 48 patients with familial frontotemporal dementia (FTD) negative for MAPT, GRN, and C9orf72 mutations for other known FTD genes by using whole exome sequencing. In addition, we carried out targeted sequencing of a cohort of 37 patients with frontotemporal lobar degeneration with Transactive response DNA-binding protein 43 (TDP-43) subtype from the Netherlands Brain bank. Two novel (p.Thr262Ser and p.Arg159Ser) and one reported (p.Met158Val) VCP mutations in three patients with a clinical diagnosis of FTD were identified, and were absence in population-match controls. All three patients presented with behavioral changes, with additional semantic deficits in one. No signs of Paget or muscle disease were observed. Pathological examination of the patient with VCP p.Arg159Ser mutation showed numerous TDP-43 immunoreactive (IR) neuronal intranuclear inclusions (NII) and dystrophic neurites (DN), while a lower number of NII and DN were observed in the patient with the VCP p.Thr262Ser mutation. Pathological findings of both patients were consistent with FTLD-TDP subtype D. Furthermore, only rare VCP-IR NII was observed in both cases. Our study expands the clinical heterogeneity of VCP mutations carriers, and indicates that other additional factors, such as genetic modifiers, may determine the clinical phenotype.
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Affiliation(s)
- Tsz Hang Wong
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Cyril Pottier
- Department of Neuroscience, Mayo Clinic Florida, Jacksonville, FL, USA
| | - David C Hondius
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Lieke H H Meeter
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jeroen G J van Rooij
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Shami Melhem
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Rick van Minkelen
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | | | - Harro Seelaar
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Rosa Rademakers
- Department of Neuroscience, Mayo Clinic Florida, Jacksonville, FL, USA
| | - John C van Swieten
- Alzheimer center and Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
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19
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Long XH, Zhou YF, Lan M, Huang SH, Li Liu Z, Shu Y. Valosin-containing protein promotes metastasis of osteosarcoma through autophagy induction and anoikis inhibition via the ERK/NF-κβ/beclin-1 signaling pathway. Oncol Lett 2019; 18:3823-3829. [PMID: 31516594 DOI: 10.3892/ol.2019.10716] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 06/07/2019] [Indexed: 12/19/2022] Open
Abstract
Valosin-containing protein (VCP) promotes the development of metastasis in osteosarcoma (OS) via the PI3K/Akt signaling pathway. However, inhibition of the PI3K/Akt pathway does not completely reverse VCP-mediated invasion and migration of OS, suggesting that VCP-mediated OS invasion and migration involves additional mechanisms. In the present study, a positive correlation between the expression of VCP and cell autophagy was observed among OS tissues. Inhibiting VCP may decrease the survival of malignant cells; however, an autophagy stimulator may compensate for VCP inhibition and promote malignant cell survival. Altering the level of autophagy did not affect cell invasiveness or migration. ERK, NF-κβ and beclin-1 protein expression levels were markedly decreased following VCP inhibition. These findings indicated that VCP may induce autophagy and enhance anoikis resistance without affecting cell invasiveness or migration. Via anoikis resistance, VCP may promote metastasis in OS. Therefore, targeting of the ERK/NF-κβ/beclin-1 signaling pathway may be an effective therapeutic strategy for the management of OS.
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Affiliation(s)
- Xin Hua Long
- Department of Emergency Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yun Fei Zhou
- Department of Orthopedics, The First People's Hospital of Foshan, Foshan, Guangdong 528000, P.R. China
| | - Min Lan
- Department of Emergency Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Shan Hu Huang
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zhi Li Liu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yong Shu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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20
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Hou X, Gong X, Zhang L, Li T, Yuan H, Xie Y, Peng Y, Qiu R, Xia K, Tang B, Jiang H. Identification of a potential exosomal biomarker in spinocerebellar ataxia Type 3/Machado-Joseph disease. Epigenomics 2019; 11:1037-1056. [PMID: 31144508 DOI: 10.2217/epi-2019-0081] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Aim: To identify spinocerebellar ataxia Type 3 (SCA3)-related exosomal biomarkers and the underlying mechanisms. Materials & methods: Exosomal RNAs from plasma and cerebrospinal fluid (CSF) were extracted from 24 SCA3 patients and 22 controls, respectively. Small RNA sequencing and quantitative PCR verification were performed. Gene ontology annotation and Kyoto Encyclopedia of Genes and Genomes pathway analyses of the results were carried out. Results: One novel miRNA is notably downregulated in plasma-derived exosomes, while upregulated in CSF-derived exosomes of SCA3 patients. Besides, it is successively upregulated in CSF-derived exosomes from Type 1, Type 2 and Type 3 groups. The downstream target genes were enriched in protein processing in endoplasmic reticulum and axon guidance. Conclusion: One exosomal biomarker was identified in SCA3, and this is the first time to report an exosomal miRNA as a biomarker in SCA3 internationally.
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Affiliation(s)
- Xiaocan Hou
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Xuan Gong
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Longbo Zhang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Tianjiao Li
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Hongyu Yuan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Yue Xie
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Yun Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Rong Qiu
- School of Information Science & Engineering, Central South University, Changsha, Hunan 410008, PR China
| | - Kun Xia
- Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, PR China
| | - Beisha Tang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China.,Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, PR China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan 410008, PR China.,National Clinical Research Center for Geriatrics Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Hong Jiang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China.,Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, PR China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan 410008, PR China.,National Clinical Research Center for Geriatrics Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
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21
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Bègue H, Besson-Bard A, Blanchard C, Winckler P, Bourque S, Nicolas V, Wendehenne D, Rosnoblet C. The chaperone-like protein CDC48 regulates ascorbate peroxidase in tobacco. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2665-2681. [PMID: 30821322 PMCID: PMC6506776 DOI: 10.1093/jxb/erz097] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 02/14/2019] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
There is increasing evidence that the chaperone-like protein CDC48 (cell division cycle 48) plays a role in plant immunity. Cytosolic ascorbate peroxidase (cAPX), which is a major regulator of the redox status of plant cells, has previously been shown to interact with CDC48. In this study, we examined the regulation of cAPX by the ATPase NtCDC48 during the cryptogein-induced immune response in tobacco cells. Our results not only confirmed the interaction between the proteins but also showed that it occurs in the cytosol. cAPX accumulation was modified in cells overexpressing NtCDC48, a process that was shown to involve post-translational modification of cAPX. In addition, cryptogein-induced increases in cAPX activity were suppressed in cells overexpressing NtCDC48 and the abundance of the cAPX dimer was below the level of detection. Furthermore, the levels of both reduced (GSH) and oxidized glutathione (GSSG) and the GSH/GSSG ratio decreased more rapidly in response to the elicitor in these cells than in controls. A decrease in cAPX activity was also observed in response to heat shock in the cells overexpressing NtCDC48, indicating that the regulation of cAPX by NtCDC48 is not specific to the immune response.
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Affiliation(s)
- Hervé Bègue
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Angélique Besson-Bard
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Cécile Blanchard
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Pascale Winckler
- Plateforme Dimacell/Imagerie spectroscopique UMR Procédés Alimentaires et Microbiologiques Equipe Procédés Microbiologiques et Biotechnologiques, AgroSup Dijon Nord, Dijon, France
| | - Stéphane Bourque
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Valérie Nicolas
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - David Wendehenne
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
| | - Claire Rosnoblet
- Agroécologie, AgroSup Dijon, CNRS, INRA, Université Bourgogne, Université Bourgogne Franche-Comté, Dijon, France
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22
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Shi L, Zhang XB, Shi YF, Xu X, He Y, Shao G, Huang QN, Wu JL. OsCDC48/48E complex is required for plant survival in rice (Oryza sativa L.). PLANT MOLECULAR BIOLOGY 2019; 100:163-179. [PMID: 30937701 PMCID: PMC6513905 DOI: 10.1007/s11103-019-00851-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate that the C-terminus of OsCDC48 is essential for maintaining its full ATPase activity and OsCDC48/48E interaction is required to modulate cellular processes and plant survival in rice. Cell division cycle 48 (CDC48) belongs to the superfamily protein of ATPases associated with diverse cellular activities (AAA). We previously isolated a rice CDC48 mutant (psd128) displaying premature senescence and death phenotype. Here, we showed that OsCDC48 (Os03g0151800) interacted with OsCDC48E (Os10g0442600), a homologue of OsCDC48, to control plant survival in rice. OsCDC48E knockout plants exhibited similar behavior to psd128 with premature senescence and plant death. Removal of the C-terminus of OsCDC48 caused altered expression of cell cycle-related genes, changed the percentage of cells in G1 and G2/M phases, and abolished the interaction between OsCDC48 itself and between OsCDC48 and OsCDC48E, respectively. Furthermore, the truncated OsCDC48-PSD128 protein lacking the C-terminal 27 amino acid residues showed a decreased level of ATPase activity. Overexpression of OsCDC48-psd128 resulted in differential expression of AAA-ATPase associated genes leading to increased total ATPase activity, accumulation of reactive oxygen species and decreased plant tiller numbers while overexpression of OsCDC48 also resulted in differential expression of AAA-ATPase associated genes leading to increased total ATPase activity, but increased plant tiller numbers and grain yield, indicating its potential utilization for yield improvement. Our results demonstrated that the C-terminal region of OsCDC48 was essential for maintaining the full ATPase activity and OsCDC48/48E complex might function in form of heteromultimers to modulate cellular processes and plant survival in rice.
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Affiliation(s)
- Lei Shi
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiao-Bo Zhang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China
| | - Yong-Feng Shi
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China
| | - Xia Xu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China
| | - Yuqing He
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Guosheng Shao
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China
| | - Qi-Na Huang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China.
| | - Jian-Li Wu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou, 310006, China.
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23
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Brody MJ, Vanhoutte D, Bakshi CV, Liu R, Correll RN, Sargent MA, Molkentin JD. Disruption of valosin-containing protein activity causes cardiomyopathy and reveals pleiotropic functions in cardiac homeostasis. J Biol Chem 2019; 294:8918-8929. [PMID: 31006653 DOI: 10.1074/jbc.ra119.007585] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 04/08/2019] [Indexed: 01/14/2023] Open
Abstract
Valosin-containing protein (VCP), also known as p97, is an ATPase with diverse cellular functions, although the most highly characterized is targeting of misfolded or aggregated proteins to degradation pathways, including the endoplasmic reticulum-associated degradation (ERAD) pathway. However, how VCP functions in the heart has not been carefully examined despite the fact that human mutations in VCP cause Paget disease of bone and frontotemporal dementia, an autosomal dominant multisystem proteinopathy that includes disease in the heart, skeletal muscle, brain, and bone. Here we generated heart-specific transgenic mice overexpressing WT VCP or a VCPK524A mutant with deficient ATPase activity. Transgenic mice overexpressing WT VCP exhibit normal cardiac structure and function, whereas mutant VCP-overexpressing mice develop cardiomyopathy. Mechanistically, mutant VCP-overexpressing hearts up-regulate ERAD complex components and have elevated levels of ubiquitinated proteins prior to manifestation of cardiomyopathy, suggesting dysregulation of ERAD and inefficient clearance of proteins targeted for proteasomal degradation. The hearts of mutant VCP transgenic mice also exhibit profound defects in cardiomyocyte nuclear morphology with increased nuclear envelope proteins and nuclear lamins. Proteomics revealed overwhelming interactions of endogenous VCP with ribosomal, ribosome-associated, and RNA-binding proteins in the heart, and impairment of cardiac VCP activity resulted in aggregation of large ribosomal subunit proteins. These data identify multifactorial functions and diverse mechanisms whereby VCP regulates cardiomyocyte protein and RNA quality control that are critical for cardiac homeostasis, suggesting how human VCP mutations negatively affect the heart.
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Affiliation(s)
- Matthew J Brody
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039
| | - Davy Vanhoutte
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039
| | - Chinmay V Bakshi
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039
| | - Ruije Liu
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039.,the Department of Biomedical Sciences, Grand Valley State University, Allendale, Michigan 49401, and
| | - Robert N Correll
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039.,the Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama 35487-0344
| | - Michelle A Sargent
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039
| | - Jeffery D Molkentin
- From the Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio 45229-3039, .,the Howard Hughes Medical Institute, Cincinnati, Ohio 45229-3039
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24
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Haile ZM, Malacarne G, Pilati S, Sonego P, Moretto M, Masuero D, Vrhovsek U, Engelen K, Baraldi E, Moser C. Dual Transcriptome and Metabolic Analysis of Vitis vinifera cv. Pinot Noir Berry and Botrytis cinerea During Quiescence and Egressed Infection. FRONTIERS IN PLANT SCIENCE 2019; 10:1704. [PMID: 32082332 PMCID: PMC7002552 DOI: 10.3389/fpls.2019.01704] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 12/04/2019] [Indexed: 05/16/2023]
Abstract
Botrytis cinerea is an important necrotroph in vineyards. Primary infections are mostly initiated by airborne conidia from overwintered sources around bloom, then the fungus remains quiescent from bloom till maturity and egresses at ripeness. We previously described in detail the process of flower infection and quiescence initiation. Here, we complete the characterization studying the cross-talk between the plant and the fungus during pathogen quiescence and egression by an integrated transcriptomic and metabolic analysis of the host and the pathogen. Flowers from fruiting cuttings of the cv. Pinot Noir were inoculated with a GFP-labeled strain of B. cinerea at full cap-off stage, and molecular analyses were carried out at 4 weeks post inoculation (wpi, fungal quiescent state) and at 12 wpi (fungal pre-egression and egression states). The expressed fungal transcriptome highlighted that the fungus remodels its cell wall to evade plant chitinases besides undergoing basal metabolic activities. Berries responded by differentially regulating genes encoding for different PR proteins and genes involved in monolignol, flavonoid, and stilbenoid biosynthesis pathways. At 12 wpi, the transcriptome of B. cinerea in the pre-egressed samples showed that virulence-related genes were expressed, suggesting infection process was initiated. The egressed B. cinerea expressed almost all virulence and growth related genes that enabled the pathogen to colonize the berries. In response to egression, ripe berries reprogrammed different defense responses, though futile. Examples are activation of membrane localized kinases, stilbene synthases, and other PR proteins related to SA and JA-mediated responses. Our results indicated that hard-green berries defense program was capable to hamper B. cinerea growth. However, ripening associated fruit cell wall self-disassembly together with high humidity created the opportunity for the fungus to egress and cause bunch rot.
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Affiliation(s)
- Zeraye Mehari Haile
- Department of Genomics and Biology of Fruit Crops, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
- Laboratory of Biotechnology and Plant Pathology, DISTAL, University of Bologna, Bologna, Italy
- Plant Protection Research Division of Melkassa Agricultural Research Center, Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia
| | - Giulia Malacarne
- Department of Genomics and Biology of Fruit Crops, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
- *Correspondence: Giulia Malacarne,
| | - Stefania Pilati
- Department of Genomics and Biology of Fruit Crops, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Paolo Sonego
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Marco Moretto
- Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Domenico Masuero
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Urska Vrhovsek
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Kristof Engelen
- ESAT-ELECTA, Electrical Energy and Computer Architectures, Leuven, Belgium
| | - Elena Baraldi
- Laboratory of Biotechnology and Plant Pathology, DISTAL, University of Bologna, Bologna, Italy
| | - Claudio Moser
- Department of Genomics and Biology of Fruit Crops, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
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25
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Wang X, Bai E, Zhou H, Sha S, Miao H, Qin Y, Liu Z, Wang J, Zhang H, Lei M, Liu J, Hai O, Zhu Y. Discovery of a new class of valosine containing protein (VCP/P97) inhibitors for the treatment of non-small cell lung cancer. Bioorg Med Chem 2018; 27:533-544. [PMID: 30606672 DOI: 10.1016/j.bmc.2018.12.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/19/2018] [Accepted: 12/27/2018] [Indexed: 10/27/2022]
Abstract
Valosine containing protein (VCP/p97) is a member of the AAA ATPase family involved in several essential cellular functions and plays an important role in the ubiquitin-mediated degradation of misfolded proteins. P97 has a significant role in maintaining the cellular protein homeostasis for tumor cell growth and survival and has been found overexpressed in many tumor types. No new molecule entities based on p97 target were approved in clinic. Herein, a series of novel pyrimidine structures as p97 inhibitors were designed and synthesized. After enzymatic evaluations, structure-activity relationships (SAR) were discussed in detailed. Among the screened compounds, derivative 35 showed excellent enzymatic inhibitory activity (IC50, 36 nM). The cellular inhibition results showed that compound 35 had good antiproliferative activity against the non-small cell lung cancer A549 cells (IC50, 1.61 μM). Liver microsome stability showed that the half-life of compound 35 in human liver microsome was 42.3 min, which was more stable than the control CB-5083 (25.8 min). The in vivo pharmacokinetic results showed that the elimination phase half-lives of compound 35 were 4.57 h for ig and 3.64 h for iv, respectively and the oral bioavailability was only 4.5%. These results indicated that compound 35 could be effective for intravenous treatment of non-small cell lung cancer.
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Affiliation(s)
- Xueyuan Wang
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Enhe Bai
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Hui Zhou
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Sijia Sha
- College of Science, Nanjing Forestry University, No. 159 Longpan Road, Nanjing 210037, PR China
| | - Hang Miao
- College of Science, Nanjing Forestry University, No. 159 Longpan Road, Nanjing 210037, PR China
| | - Yanru Qin
- School of Bio-engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 Daxue Rd. Changqing District, Jinan 250353, PR China
| | - Zhaogang Liu
- Jiangsu Chia Tai Fenghai Pharmaceutical Co. Ltd., No. 9 Weidi Road, Nanjing 210046, PR China
| | - Jia Wang
- Jiangsu Chia Tai Fenghai Pharmaceutical Co. Ltd., No. 9 Weidi Road, Nanjing 210046, PR China
| | - Haoyang Zhang
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China
| | - Meng Lei
- College of Science, Nanjing Forestry University, No. 159 Longpan Road, Nanjing 210037, PR China.
| | - Jia Liu
- Jiangsu Chia Tai Fenghai Pharmaceutical Co. Ltd., No. 9 Weidi Road, Nanjing 210046, PR China
| | - Ou Hai
- Jiangsu Chia Tai Fenghai Pharmaceutical Co. Ltd., No. 9 Weidi Road, Nanjing 210046, PR China
| | - Yongqiang Zhu
- College of Life Science, Nanjing Normal University, No. 1 Wenyuan Road, Nanjing 210037, PR China.
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26
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Altered expression of p97/Valosin containing protein and impaired autophagy in preeclamptic human placenta. Placenta 2018; 67:45-53. [PMID: 29941173 DOI: 10.1016/j.placenta.2018.05.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/18/2018] [Accepted: 05/28/2018] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Autophagy increases in placenta-related obstetrical diseases such as preeclampsia and intrauterine growth retardation but the regulation of autophagy by ubiquitin proteasome pathway (UPP) proteins, p97/Valosin containing protein (VCP) and ubiquitin (Ub) have not been previuosly studied in preeclampsia. The objective of this study is to investigate the expression of UPP (p97/VCP and Ub), autophagosomal (p62 and LC3) and autolysosomal proteins (Lamp1 and Lamp2) in the normal and preeclamptic human placentas and to explore the regulatory mechanism of these proteins in autophagic pathway. MATERIAL AND METHODS Different portions of normal term placentas (n = 20) and preeclamptic placentas (n = 10) were snap-frozen in liquid nitrogen for Western blotting and coimmunoprecipitation and others were fixed-embedded in paraffin for immunohistochemistry. Colocalization and coimmunoprecipitation experiments were done for the detection of interaction between p97/VCP and autophagic proteins. RESULTS Compared with normal placentas, expression of p97/VCP was significantly reduced; however accumulation of ubiquitinlated proteins were significantly increased in preeclamptic placentas. The expression of autophagosomal proteins (LC3-II and p62) were significantly increased and no significant alterations of the expression of autolysosomal proteins were observed in preeclamptic placentas. Additionally, p97/VCP was found to colocalized and interact with autophagosomal and autolysosomal markers in normal and preeclamptic placentas. Autophagosome maturation diminished and autophagosomes had decreased localization with lysosomal markers in preeclamptic human placentas. CONCLUSION Decreased expression of p97/VCP and increased expression of Ub in preeclampsia might be related to impaired autophagy and pathophysiology of preeclampsia. Therefore, our study highlights an important potential relationship between p97/VCP and autophagic proteins in preeclampsia.
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27
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Bosque A, Dietz L, Gallego-Lleyda A, Sanclemente M, Iturralde M, Naval J, Alava MA, Martínez-Lostao L, Thierse HJ, Anel A. Comparative proteomics of exosomes secreted by tumoral Jurkat T cells and normal human T cell blasts unravels a potential tumorigenic role for valosin-containing protein. Oncotarget 2017; 7:29287-305. [PMID: 27086912 PMCID: PMC5045396 DOI: 10.18632/oncotarget.8678] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 03/28/2016] [Indexed: 12/21/2022] Open
Abstract
We have previously characterized that FasL and Apo2L/TRAIL are stored in their bioactive form inside human T cell blasts in intraluminal vesicles present in multivesicular bodies. These vesicles are rapidly released to the supernatant in the form of exosomes upon re-activation of T cells. In this study we have compared for the first time proteomics of exosomes produced by normal human T cell blasts with those produced by tumoral Jurkat cells, with the objective of identify proteins associated with tumoral exosomes that could have a previously unrecognized role in malignancy. We have identified 359 and 418 proteins in exosomes from T cell blasts and Jurkat cells, respectively. Interestingly, only 145 (around a 40%) are common. The major proteins in both cases are actin and tubulin isoforms and the common interaction nodes correspond to these cytoskeleton and related proteins, as well as to ribosomal and mRNA granule proteins. We detected 14 membrane proteins that were especially enriched in exosomes from Jurkat cells as compared with T cell blasts. The most abundant of these proteins was valosin-containing protein (VCP), a membrane ATPase involved in ER homeostasis and ubiquitination. In this work, we also show that leukemic cells are more sensitive to cell death induced by the VCP inhibitor DBeQ than normal T cells. Furthermore, VCP inhibition prevents functional exosome secretion only in Jurkat cells, but not in T cell blasts. These results suggest VCP targeting as a new selective pathway to exploit in cancer treatment to prevent tumoral exosome secretion.
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Affiliation(s)
- Alberto Bosque
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain.,Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Lisa Dietz
- Research Group for Immunology & Proteomics, Department of Dermatology, University Medical Center Mannheim, Ruprechts-Karls-University, Heidelberg, Germany
| | - Ana Gallego-Lleyda
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - Manuel Sanclemente
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - María Iturralde
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - Javier Naval
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - María Angeles Alava
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
| | - Luis Martínez-Lostao
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain.,Instituto de Nanociencia de Aragón (INA), Zaragoza, Spain.,Servicio de Inmunología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain
| | - Hermann-Josef Thierse
- Research Group for Immunology & Proteomics, Department of Dermatology, University Medical Center Mannheim, Ruprechts-Karls-University, Heidelberg, Germany
| | - Alberto Anel
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Instituto de Investigación Sanitaria de Aragón (IIS-Aragón), Zaragoza, Spain
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28
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Shinjo SK, Oba-Shinjo SM, Lerario AM, Marie SKN. A Brazilian family with inclusion body myopathy associated with Paget’s disease of bone and frontotemporal dementia linked to the VCP pGly97Glu mutation. Clin Rheumatol 2017; 37:1129-1136. [DOI: 10.1007/s10067-017-3913-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 11/06/2017] [Indexed: 12/12/2022]
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29
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Saffert P, Enenkel C, Wendler P. Structure and Function of p97 and Pex1/6 Type II AAA+ Complexes. Front Mol Biosci 2017; 4:33. [PMID: 28611990 PMCID: PMC5447069 DOI: 10.3389/fmolb.2017.00033] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/05/2017] [Indexed: 12/16/2022] Open
Abstract
Protein complexes of the Type II AAA+ (ATPases associated with diverse cellular activities) family are typically hexamers of 80–150 kDa protomers that harbor two AAA+ ATPase domains. They form double ring assemblies flanked by associated domains, which can be N-terminal, intercalated or C-terminal to the ATPase domains. Most prominent members of this family include NSF (N-ethyl-maleimide sensitive factor), p97/VCP (valosin-containing protein), the Pex1/Pex6 complex and Hsp104 in eukaryotes and ClpB in bacteria. Tremendous efforts have been undertaken to understand the conformational dynamics of protein remodeling type II AAA+ complexes. A uniform mode of action has not been derived from these works. This review focuses on p97/VCP and the Pex1/6 complex, which both structurally remodel ubiquitinated substrate proteins. P97/VCP plays a role in many processes, including ER- associated protein degradation, and the Pex1/Pex6 complex dislocates and recycles the transport receptor Pex5 from the peroxisomal membrane during peroxisomal protein import. We give an introduction into existing knowledge about the biochemical and cellular activities of the complexes before discussing structural information. We particularly emphasize recent electron microscopy structures of the two AAA+ complexes and summarize their structural differences.
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Affiliation(s)
- Paul Saffert
- Department of Biochemistry, Institute of Biochemistry and Biology, University of PotsdamPotsdam, Germany
| | - Cordula Enenkel
- Department of Biochemistry, University of TorontoToronto, ON, Canada
| | - Petra Wendler
- Department of Biochemistry, Institute of Biochemistry and Biology, University of PotsdamPotsdam, Germany
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30
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Ubiquitin- and ATP-dependent unfoldase activity of P97/VCP•NPLOC4•UFD1L is enhanced by a mutation that causes multisystem proteinopathy. Proc Natl Acad Sci U S A 2017; 114:E4380-E4388. [PMID: 28512218 DOI: 10.1073/pnas.1706205114] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
p97 is a "segregase" that plays a key role in numerous ubiquitin (Ub)-dependent pathways such as ER-associated degradation. It has been hypothesized that p97 extracts proteins from membranes or macromolecular complexes to enable their proteasomal degradation; however, the complex nature of p97 substrates has made it difficult to directly observe the fundamental basis for this activity. To address this issue, we developed a soluble p97 substrate-Ub-GFP modified with K48-linked ubiquitin chains-for in vitro p97 activity assays. We demonstrate that WT p97 can unfold proteins and that this activity is dependent on the p97 adaptor NPLOC4-UFD1L, ATP hydrolysis, and substrate ubiquitination, with branched chains providing maximal stimulation. Furthermore, we show that a p97 mutant that causes inclusion body myopathy, Paget's disease of bone, and frontotemporal dementia in humans unfolds substrate faster, suggesting that excess activity may underlie pathogenesis. This work overcomes a significant barrier in the study of p97 and will allow the future dissection of p97 mechanism at a level of detail previously unattainable.
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31
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Ward BK, Rea SL, Magno AL, Pedersen B, Brown SJ, Mullin S, Arulpragasam A, Ingley E, Conigrave AD, Ratajczak T. The endoplasmic reticulum-associated protein, OS-9, behaves as a lectin in targeting the immature calcium-sensing receptor. J Cell Physiol 2017; 233:38-56. [PMID: 28419469 DOI: 10.1002/jcp.25957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 04/13/2017] [Indexed: 11/07/2022]
Abstract
The mechanisms responsible for the processing and quality control of the calcium-sensing receptor (CaSR) in the endoplasmic reticulum (ER) are largely unknown. In a yeast two-hybrid screen of the CaSR C-terminal tail (residues 865-1078), we identified osteosarcoma-9 (OS-9) protein as a binding partner. OS-9 is an ER-resident lectin that targets misfolded glycoproteins to the ER-associated degradation (ERAD) pathway through recognition of specific N-glycans by its mannose-6-phosphate receptor homology (MRH) domain. We show by confocal microscopy that the CaSR and OS-9 co-localize in the ER in COS-1 cells. In immunoprecipitation studies with co-expressed OS-9 and CaSR, OS-9 specifically bound the immature form of wild-type CaSR in the ER. OS-9 also bound the immature forms of a CaSR C-terminal deletion mutant and a C677A mutant that remains trapped in the ER, although binding to neither mutant was favored over wild-type receptor. OS-9 binding to immature CaSR required the MRH domain of OS-9 indicating that OS-9 acts as a lectin most likely to target misfolded CaSR to ERAD. Our results also identify two distinct binding interactions between OS-9 and the CaSR, one involving both C-terminal domains of the two proteins and the other involving both N-terminal domains. This suggests the possibility of more than one functional interaction between OS-9 and the CaSR. When we investigated the functional consequences of altered OS-9 expression, neither knockdown nor overexpression of OS-9 was found to have a significant effect on CaSR cell surface expression or CaSR-mediated ERK1/2 phosphorylation.
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Affiliation(s)
- Bryan K Ward
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Sarah L Rea
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Aaron L Magno
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Bernadette Pedersen
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Suzanne J Brown
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Shelby Mullin
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Ajanthy Arulpragasam
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Evan Ingley
- Cell Signalling Group, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
| | - Arthur D Conigrave
- School of Life and Environmental Sciences, Charles Perkins Centre, University of Sydney, New South Wales, Australia
| | - Thomas Ratajczak
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
- Laboratory for Molecular Endocrinology, Harry Perkins Institute of Medical Research and the Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia
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32
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Binelli A, Del Giacco L, Santo N, Bini L, Magni S, Parolini M, Madaschi L, Ghilardi A, Maggioni D, Ascagni M, Armini A, Prosperi L, Landi C, La Porta C, Della Torre C. Carbon nanopowder acts as a Trojan-horse for benzo(α)pyrene in Danio rerio embryos. Nanotoxicology 2017; 11:371-381. [DOI: 10.1080/17435390.2017.1306130] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- A. Binelli
- Department of Biosciences, University of Milan, Milan, Italy
| | - L. Del Giacco
- Department of Biosciences, University of Milan, Milan, Italy
| | - N. Santo
- Department of Biosciences, University of Milan, Milan, Italy
| | - L. Bini
- Department of Life Science, University of Siena, Siena, Italy
| | - S. Magni
- Department of Biosciences, University of Milan, Milan, Italy
| | - M. Parolini
- Department of Biosciences, University of Milan, Milan, Italy
| | - L. Madaschi
- Department of Biosciences, University of Milan, Milan, Italy
| | - A. Ghilardi
- Department of Biosciences, University of Milan, Milan, Italy
| | - D. Maggioni
- Department of Chemistry, University of Milan, Milan, Italy
| | - M. Ascagni
- Department of Biosciences, University of Milan, Milan, Italy
| | - A. Armini
- Department of Life Science, University of Siena, Siena, Italy
| | - L. Prosperi
- Department of Biosciences, University of Milan, Milan, Italy
| | - C. Landi
- Department of Life Science, University of Siena, Siena, Italy
| | - C. La Porta
- Department of Biosciences, University of Milan, Milan, Italy
| | - C. Della Torre
- Department of Biosciences, University of Milan, Milan, Italy
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Aileni V, Davydova E, Moen A, Falnes PØ. A System for Enzymatic Lysine Methylation in a Desired Sequence Context. ACS OMEGA 2017; 2:462-469. [PMID: 28357416 PMCID: PMC5365176 DOI: 10.1021/acsomega.6b00486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 01/18/2017] [Indexed: 06/06/2023]
Abstract
A number of lysine-specific methyltransferases (KMTs) are responsible for the post-translational modification of cellular proteins on lysine residues. Most KMTs typically recognize specific motifs in unstructured, short peptide sequences. However, we have recently discovered a novel KMT that appeared to have a more relaxed sequence specificity, namely, valosin-containing protein (VCP)-KMT, which trimethylates Lys-315 in the molecular chaperone VCP. On the basis of this, here, we explored the possibility of using the VCP-KMT/VCP system to obtain specific lysine methylation of desired sequences grafted onto a VCP-derived scaffold. We generated VCP-derived proteins in which three amino acid residues on each side of Lys-315 had been replaced by various sequences representing lysine methylation sites in histone H3. We found that all of these chimeric proteins were subject to efficient VCP-KMT-mediated methylation in vitro, and methylation was also observed in mammalian cells. Thus, we here describe a versatile system for introducing lysine methylation into a desired peptide sequence, and the approach should be readily expandable for generating combinatorial libraries of methylated sequences.
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34
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Moloney C, Rayaprolu S, Howard J, Fromholt S, Brown H, Collins M, Cabrera M, Duffy C, Siemienski Z, Miller D, Swanson MS, Notterpek L, Borchelt DR, Lewis J. Transgenic mice overexpressing the ALS-linked protein Matrin 3 develop a profound muscle phenotype. Acta Neuropathol Commun 2016; 4:122. [PMID: 27863507 PMCID: PMC5116203 DOI: 10.1186/s40478-016-0393-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 11/09/2016] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder of upper and lower motor neurons. Mutations in the gene encoding the nuclear matrix protein Matrin 3 have been found in familial cases of ALS, as well as autosomal dominant distal myopathy with vocal cord and pharyngeal weakness. We previously found that spinal cord and muscle, organs involved in either ALS or distal myopathy, have relatively lower levels of Matrin 3 compared to the brain and other peripheral organs in the murine system. This suggests that these organs may be vulnerable to any changes in Matrin 3. In order to determine the role of Matrin 3 in these diseases, we created a transgenic mouse model for human wild-type Matrin 3 using the mouse prion promoter (MoPrP) on a FVB background. We identified three founder transgenic lines that produced offspring in which mice developed either hindlimb paresis or paralysis with hindlimb and forelimb muscle atrophy. Muscles of affected mice showed a striking increase in nuclear Matrin 3, as well as the presence of rounded fibers, vacuoles, nuclear chains, and subsarcolemmal nuclei. Immunoblot analysis of the gastrocnemius muscle from phenotypic mice showed increased levels of Matrin 3 products migrating at approximately 120 (doublet), 90, 70, and 55 kDa. While there was no significant change in the levels of Matrin 3 in the spinal cord in the phenotypic mice, the ventral horn contained individual cells with cytoplasmic redistribution of Matrin 3, as well as gliosis. The phenotypes of these mice indicate that dysregulation of Matrin 3 levels is deleterious to neuromuscular function.
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Bayraktar O, Oral O, Kocaturk NM, Akkoc Y, Eberhart K, Kosar A, Gozuacik D. IBMPFD Disease-Causing Mutant VCP/p97 Proteins Are Targets of Autophagic-Lysosomal Degradation. PLoS One 2016; 11:e0164864. [PMID: 27768726 PMCID: PMC5074563 DOI: 10.1371/journal.pone.0164864] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 10/03/2016] [Indexed: 01/07/2023] Open
Abstract
The ubiquitin-proteasome system (UPS) degrades soluble proteins and small aggregates, whereas macroautophagy (autophagy herein) eliminates larger protein aggregates, tangles and even whole organelles in a lysosome-dependent manner. VCP/p97 was implicated in both pathways. VCP/p97 mutations cause a rare multisystem disease called IBMPFD (Inclusion Body Myopathy with Paget's Disease and Frontotemporal Dementia). Here, we studied the role IBMPFD-related mutants of VCP/p97 in autophagy. In contrast with the wild-type VCP/p97 protein or R155C or R191Q mutants, the P137L mutant was aggregate-prone. We showed that, unlike commonly studied R155C or R191Q mutants, the P137L mutant protein stimulated both autophagosome and autolysosome formation. Moreover, P137L mutant protein itself was a substrate of autophagy. Starvation- and mTOR inhibition-induced autophagy led to the degradation of the P137L mutant protein, while preserving the wild-type and functional VCP/p97. Strikingly, similar to the P137L mutant, other IBMPFD-related VCP/p97 mutants, namely R93C and G157R mutants induced autophagosome and autolysosome formation; and G157R mutant formed aggregates that could be cleared by autophagy. Therefore, cellular phenotypes caused by P137L mutant expression were not isolated observations, and some other IBMPFD disease-related VCP/p97 mutations could lead to similar outcomes. Our results indicate that cellular mechanisms leading to IBMPFD disease may be various, and underline the importance of studying different disease-associated mutations in order to better understand human pathologies and tailor mutation-specific treatment strategies.
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Affiliation(s)
- Oznur Bayraktar
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Istanbul, 34956, Turkey
| | - Ozlem Oral
- Sabanci University, Nanotechnology Research and Application Center, Istanbul, 34956, Turkey
| | - Nur Mehpare Kocaturk
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Istanbul, 34956, Turkey
| | - Yunus Akkoc
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Istanbul, 34956, Turkey
| | - Karin Eberhart
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Istanbul, 34956, Turkey
| | - Ali Kosar
- Sabanci University, Faculty of Engineering and Natural Sciences, Mechatronics Engineering Program, Istanbul, 34956, Turkey
- Sabanci University, Center of Excellence for Functional Surfaces and Interfaces for Nano Diagnostics (EFSUN), Istanbul, 34956, Turkey
| | - Devrim Gozuacik
- Sabanci University, Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics and Bioengineering Program, Istanbul, 34956, Turkey
- Sabanci University, Center of Excellence for Functional Surfaces and Interfaces for Nano Diagnostics (EFSUN), Istanbul, 34956, Turkey
- * E-mail:
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Bègue H, Jeandroz S, Blanchard C, Wendehenne D, Rosnoblet C. Structure and functions of the chaperone-like p97/CDC48 in plants. Biochim Biophys Acta Gen Subj 2016; 1861:3053-3060. [PMID: 27717811 DOI: 10.1016/j.bbagen.2016.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/29/2016] [Accepted: 10/01/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND The chaperone-like p97 is a member of the AAA+ ATPase enzyme family that contributes to numerous cellular activities. P97 has been broadly studied in mammals (VCP/p97) and yeasts (CDC48: Cell Division Cycle 48/p97) and numerous investigations highlighted that this protein is post-translationally regulated, is structured in homohexamer and interacts with partners and cofactors that direct it to distinct cellular signalization pathway including protein quality control and degradation, cell cycle regulation, genome stability, vesicular trafficking, autophagy and immunity. SCOPE OF REVIEW p97 is also conserved in plants (CDC48) but its functions are less understood. In the present review we intended to present the state of the art of the structure, regulation and functions of CDC48 in plants. MAJOR CONCLUSIONS Evidence accumulated underline that CDC48 plays a crucial role in development, cell cycle regulation and protein turnover in plants. Furthermore, its involvement in plant immunity has recently emerged and first interacting partners have been identified, shedding light on its putative cellular activities. GENERAL SIGNIFICANCE Identification of emerging functions of CDC48 in plants opens new roads of research in immunity and provides new insights into the mechanisms of protein quality control.
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Affiliation(s)
- Hervé Bègue
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Sylvain Jeandroz
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Cécile Blanchard
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France
| | - David Wendehenne
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France
| | - Claire Rosnoblet
- Agroécologie, AgroSup Dijon, CNRS, INRA, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France.
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37
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Interruption of magnesium supply at heading influenced proteome of peripheral layers and reduced grain dry weight of two wheat ( Triticum aestivum L.) genotypes. J Proteomics 2016; 143:83-92. [DOI: 10.1016/j.jprot.2016.03.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 02/17/2016] [Accepted: 03/14/2016] [Indexed: 11/18/2022]
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38
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Viswanathan MC, Blice-Baum AC, Sang TK, Cammarato A. Cardiac-Restricted Expression of VCP/TER94 RNAi or Disease Alleles Perturbs Drosophila Heart Structure and Impairs Function. J Cardiovasc Dev Dis 2016; 3. [PMID: 27500162 PMCID: PMC4973812 DOI: 10.3390/jcdd3020019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Valosin-containing protein (VCP) is a highly conserved mechanoenzyme that helps maintain protein homeostasis in all cells and serves specialized functions in distinct cell types. In skeletal muscle, it is critical for myofibrillogenesis and atrophy. However, little is known about VCP’s role(s) in the heart. Its functional diversity is determined by differential binding of distinct cofactors/adapters, which is likely disrupted during disease. VCP mutations cause multisystem proteinopathy (MSP), a pleiotropic degenerative disorder that involves inclusion body myopathy. MSP patients display progressive muscle weakness. They also exhibit cardiomyopathy and die from cardiac and respiratory failure, which are consistent with critical myocardial roles for the enzyme. Nonetheless, efficient models to interrogate VCP in cardiac muscle remain underdeveloped and poorly studied. Here, we investigated the significance of VCP and mutant VCP in the Drosophila heart. Cardiac-restricted RNAi-mediated knockdown of TER94, the Drosophila VCP homolog, severely perturbed myofibrillar organization and heart function in adult flies. Furthermore, expression of MSP disease-causing alleles engendered cardiomyopathy in adults and structural defects in embryonic hearts. Drosophila may therefore serve as a valuable model for examining role(s) of VCP in cardiogenesis and for identifying novel heart-specific VCP interactions, which when disrupted via mutation, contribute to or elicit cardiac pathology.
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Affiliation(s)
- Meera C. Viswanathan
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Ross 1050, 720 Rutland Avenue, Baltimore, MD 21205, USA; (M.C.V.); (A.C.B.-B.)
| | - Anna C. Blice-Baum
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Ross 1050, 720 Rutland Avenue, Baltimore, MD 21205, USA; (M.C.V.); (A.C.B.-B.)
| | - Tzu-Kang Sang
- Institute of Biotechnology & Department of Life Science, National Tsing Hua University, Hsinchu City 30013, Taiwan;
| | - Anthony Cammarato
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Ross 1050, 720 Rutland Avenue, Baltimore, MD 21205, USA; (M.C.V.); (A.C.B.-B.)
- Department of Physiology, Johns Hopkins University, Ross 1050, 720 Rutland Avenue, Baltimore, MD 21205, USA
- Correspondence: ; Tel.: +1-410-955-1807; Fax: +1-410-502-2558
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Regulation of VCP/p97 demonstrates the critical balance between cell death and epithelial-mesenchymal transition (EMT) downstream of ER stress. Oncotarget 2016; 6:17725-37. [PMID: 25970786 PMCID: PMC4627341 DOI: 10.18632/oncotarget.3918] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/08/2015] [Indexed: 11/28/2022] Open
Abstract
Valosin-containing protein (VCP), also called p97, is a AAA+ ATPase that has been shown to be involved in endoplasmic reticulum-associated protein degradation (ERAD), mitochondria quality control and vesicle transport. We and others have previously found that disruption of VCP is sufficient to cause endoplasmic reticulum (ER) stress. We observed that induction of ER stress either following siRNA mediated loss of VCP or inhibition of VCP with eeyarestatin I potently activates an EMT-like state in cells. Interestingly, both ER stress and EMT are reversible events. Further, brief treatment of cells with eeyarestatin I increases EMT markers, and migratory and invasive properties of lung cancer cells. By examining primary lung adenocarcinoma patient samples we find that the VCP locus is heterozygously lost in nearly half of lung adenocarcinomas and VCP protein expression is decreased in nearly all primary lung tumors. Further, primary lung adenocarcinomas have increased ER stress and EMT markers. These observations have potential clinical relevance because increased ER stress and EMT markers are known to contribute to chemoresistance and poor survival of patients with lung adenocarcinoma.
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40
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Gui L, Zhang X, Li K, Frankowski KJ, Li S, Wong DE, Moen DR, Porubsky PR, Lin HJ, Schoenen FJ, Chou TF. Evaluating p97 Inhibitor Analogues for Potency against p97-p37 and p97-Npl4-Ufd1 Complexes. ChemMedChem 2016; 11:953-7. [PMID: 27043824 PMCID: PMC9049307 DOI: 10.1002/cmdc.201600036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Indexed: 12/21/2022]
Abstract
We previously found that the p97 cofactor, p47, significantly decreased the potency of some ATP-competitive p97 inhibitors such as ML240 [2-(2-amino-1H-benzo[d]imidazol-1-yl)-N-benzyl-8-methoxyquinazolin-4-amine] and ML241 [2-(2H-benzo[b][1,4]oxazin-4(3H)-yl)-N-benzyl-5,6,7,8 tetrahydroquinazolin-4-amine]. In this study, we aimed to evaluate inhibitor potencies against two additional p97 cofactor complexes, p97-p37 and p97-Npl4-Ufd1. We focused on these two cofactor complexes, because the protein sequence of p37 is 50 % identical to that of p47, and the Npl4-Ufd1 heterodimer (NU) is the most-studied p97 cofactor complex. We screened 200 p97 inhibitor analogues for their ability to inhibit the ATPase activity of p97 alone and of p97-p37 and p97-NU complexes. In contrast to the effect of p47, p37 and NU did not significantly change the potencies of most of the compounds. These results highlight differences among p97 cofactors in influencing p97 conformation and effects of inhibitors on p97 complexes, as compared to p97 alone. Continued efforts are needed to advance the development of complex-specific p97 inhibitors.
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Affiliation(s)
- Lin Gui
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
- School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, PR China
| | - Xiaoyi Zhang
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
- School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, PR China
| | - Kelin Li
- Specialized Chemistry Center, University of Kansas, 2034 Becker Drive, Lawrence, KS, 66047-3761, USA
| | - Kevin J Frankowski
- Specialized Chemistry Center, University of Kansas, 2034 Becker Drive, Lawrence, KS, 66047-3761, USA
| | - Shan Li
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
- School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, PR China
| | - Daniel E Wong
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
| | - Derek R Moen
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
| | - Patrick R Porubsky
- Specialized Chemistry Center, University of Kansas, 2034 Becker Drive, Lawrence, KS, 66047-3761, USA
| | - Henry J Lin
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA
| | - Frank J Schoenen
- Specialized Chemistry Center, University of Kansas, 2034 Becker Drive, Lawrence, KS, 66047-3761, USA
| | - Tsui-Fen Chou
- Division of Medical Genetics, Department of Pediatrics, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 W. Carson St, Torrance, CA, 90502, USA.
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Alverez C, Bulfer SL, Chakrasali R, Chimenti MS, Deshaies RJ, Green N, Kelly M, LaPorte MG, Lewis TS, Liang M, Moore WJ, Neitz RJ, Peshkov VA, Walters MA, Zhang F, Arkin MR, Wipf P, Huryn DM. Allosteric Indole Amide Inhibitors of p97: Identification of a Novel Probe of the Ubiquitin Pathway. ACS Med Chem Lett 2016; 7:182-7. [PMID: 26985295 DOI: 10.1021/acsmedchemlett.5b00396] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/22/2015] [Indexed: 11/28/2022] Open
Abstract
A high-throughput screen to discover inhibitors of p97 ATPase activity identified an indole amide that bound to an allosteric site of the protein. Medicinal chemistry optimization led to improvements in potency and solubility. Indole amide 3 represents a novel uncompetitive inhibitor with excellent physical and pharmaceutical properties that can be used as a starting point for drug discovery efforts.
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Affiliation(s)
- Celeste Alverez
- Department
of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stacie L. Bulfer
- Department
of Pharmaceutical Chemistry, Small Molecule Discovery Center, University of California, San Francisco, California 94158, United States
| | - Ramappa Chakrasali
- Department
of Medicinal Chemistry, and the Institute for Therapeutics Discovery
and Development, University of Minnesota, Minneapolis, Minnesota 55414, United States
| | - Michael. S. Chimenti
- Department
of Pharmaceutical Chemistry, Small Molecule Discovery Center, University of California, San Francisco, California 94158, United States
| | - Raymond J. Deshaies
- Division
of Biology and Biological Engineering, California Institute of Technology and Howard Hughes Medical Institute, Pasadena, California 91007, United States
| | - Neal Green
- Leidos Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - Mark Kelly
- Department
of Pharmaceutical Chemistry, Small Molecule Discovery Center, University of California, San Francisco, California 94158, United States
| | - Matthew G. LaPorte
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Taber S. Lewis
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Mary Liang
- Department
of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - William J. Moore
- Leidos Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - R. Jeffrey Neitz
- Department
of Pharmaceutical Chemistry, Small Molecule Discovery Center, University of California, San Francisco, California 94158, United States
| | - Vsevolod A. Peshkov
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michael A. Walters
- Department
of Medicinal Chemistry, and the Institute for Therapeutics Discovery
and Development, University of Minnesota, Minneapolis, Minnesota 55414, United States
| | - Feng Zhang
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michelle R. Arkin
- Department
of Pharmaceutical Chemistry, Small Molecule Discovery Center, University of California, San Francisco, California 94158, United States
| | - Peter Wipf
- Department
of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Donna M. Huryn
- Department
of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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42
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Triplett JC, Swomley AM, Cai J, Klein JB, Butterfield DA. Quantitative phosphoproteomic analyses of the inferior parietal lobule from three different pathological stages of Alzheimer's disease. J Alzheimers Dis 2016; 49:45-62. [PMID: 26444780 DOI: 10.3233/jad-150417] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Alzheimer's disease (AD), the most common age-related neurodegenerative disorder, is clinically characterized by progressive neuronal loss resulting in loss of memory and dementia. AD is histopathologically characterized by the extensive distribution of senile plaques and neurofibrillary tangles, and synapse loss. Amnestic mild cognitive impairment (MCI) is generally accepted to be an early stage of AD. MCI subjects have pathology and symptoms that fall on the scale intermediately between 'normal' cognition with little or no pathology and AD. A rare number of individuals, who exhibit normal cognition on psychometric tests but whose brains show widespread postmortem AD pathology, are classified as 'asymptomatic' or 'preclinical' AD (PCAD). In this study, we evaluated changes in protein phosphorylation states in the inferior parietal lobule of subjects with AD, MCI, PCAD, and control brain using a 2-D PAGE proteomics approach in conjunction with Pro-Q Diamond phosphoprotein staining. Statistically significant changes in phosphorylation levels were found in 19 proteins involved in energy metabolism, neuronal plasticity, signal transduction, and oxidative stress response. Changes in the disease state phosphoproteome may provide insights into underlying mechanisms for the preservation of memory with expansive AD pathology in PCAD and the progressive memory loss in amnestic MCI that escalates to the dementia and the characteristic pathology of AD brain.
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Affiliation(s)
- Judy C Triplett
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
| | - Aaron M Swomley
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
| | - Jian Cai
- Department of Nephrology and Proteomics Center, University of Louisville, Louisville, KY, USA
| | - Jon B Klein
- Department of Nephrology and Proteomics Center, University of Louisville, Louisville, KY, USA
| | - D Allan Butterfield
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA
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43
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Zhou HJ, Wang J, Yao B, Wong S, Djakovic S, Kumar B, Rice J, Valle E, Soriano F, Menon MK, Madriaga A, Kiss von Soly S, Kumar A, Parlati F, Yakes FM, Shawver L, Le Moigne R, Anderson DJ, Rolfe M, Wustrow D. Discovery of a First-in-Class, Potent, Selective, and Orally Bioavailable Inhibitor of the p97 AAA ATPase (CB-5083). J Med Chem 2015; 58:9480-97. [PMID: 26565666 DOI: 10.1021/acs.jmedchem.5b01346] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The AAA-ATPase p97 plays vital roles in mechanisms of protein homeostasis, including ubiquitin-proteasome system (UPS) mediated protein degradation, endoplasmic reticulum-associated degradation (ERAD), and autophagy. Herein we describe our lead optimization efforts focused on in vitro potency, ADME, and pharmaceutical properties that led to the discovery of a potent, ATP-competitive, D2-selective, and orally bioavailable p97 inhibitor 71, CB-5083. Treatment of tumor cells with 71 leads to significant accumulation of markers associated with inhibition of UPS and ERAD functions, which induces irresolvable proteotoxic stress and cell death. In tumor bearing mice, oral administration of 71 causes rapid accumulation of markers of the unfolded protein response (UPR) and subsequently induces apoptosis leading to sustained antitumor activity in in vivo xenograft models of both solid and hematological tumors. 71 has been taken into phase 1 clinical trials in patients with multiple myeloma and solid tumors.
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Affiliation(s)
- Han-Jie Zhou
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Jinhai Wang
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Bing Yao
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Steve Wong
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Stevan Djakovic
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Brajesh Kumar
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Julie Rice
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Eduardo Valle
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Ferdie Soriano
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Mary-Kamala Menon
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Antonett Madriaga
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | | | - Abhinav Kumar
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Francesco Parlati
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - F Michael Yakes
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Laura Shawver
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Ronan Le Moigne
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Daniel J Anderson
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - Mark Rolfe
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
| | - David Wustrow
- Cleave Biosciences Inc. , 866 Malcom Road, Burlingame, California 94010, United States
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44
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Segawa M, Hoshi A, Naruse H, Kuroda M, Bujo H, Ugawa Y. [A patient with familial amyotrophic lateral sclerosis associated with a new valosin-containing protein (VCP) gene mutation]. Rinsho Shinkeigaku 2015; 55:914-920. [PMID: 26511028 DOI: 10.5692/clinicalneurol.cn-000765] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this communication, we report a patient with familial amyotrophic lateral sclerosis (ALS) associated with a familial dyslipidemia. Genetic analysis revealed a novel heterozygous valosin-containing protein (VCP) mutation (c.466G>T (p.G156C)). The other gene analysis also disclosed a known homozygous LCAT mutation (c.101C>T (p.P10L)). VCP gene mutation shown should be responsible for familial ALS because of following reasons. The patient's father also was also affected by ALS. The VCP gene mutation (p.G156C) in the patient was located in the vicinity of a site frequently associated with pathogenic VCP variants. The same amino acid transformation as that of this patient has been reported to be involved in the pathogenesis of inclusion body myopathy with Paget's disease of the bone and frontotemporal dementia. This is the first case report of rare association of ALS with VCP mutation and dyslipidemia with LCAT mutation.
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Affiliation(s)
- Mari Segawa
- Department of Neurology, School of Medicine, Fukushima Medical University
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45
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Kang MM, Shan SL, Wen XY, Shan HS, Wang ZJ. Tumor-Suppression Mechanisms of Protein Tyrosine Phosphatase O and Clinical Applications. Asian Pac J Cancer Prev 2015; 16:6215-23. [PMID: 26434819 DOI: 10.7314/apjcp.2015.16.15.6215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Tyrosine phosphorylation plays an important role in regulating human physiological and pathological processes. Functional stabilization of tyrosine phosphorylation largely contributes to the balanced, coordinated regulation of protein tyrosine kinases (PTKs) and protein tyrosine phosphatases (PTPs). Research has revealed PTPs play an important suppressive role in carcinogenesis and progression by reversing oncoprotein functions. Receptor-type protein tyrosine phosphatase O (PTPRO) as one member of the PTPs family has also been identified to have some roles in tumor development. Some reports have shown PTPRO over-expression in tumors can not only inhibit the frequency of tumor cell division and induce tumor cell death, but also suppress migration. However, the tumor-suppression mechanisms are very complex and understanding is incomplete, which in some degree blocks the further development of PTPRO. Hence, in order to resolve this problem, we here have summarized research findings to draw meaningful conclusions. We found tumor-suppression mechanisms of PTPRO to be diverse, such as controlling G0/G1 of the tumor cell proliferation cycle, inhibiting substrate phosphorylation, down-regulating transcription activators and other activities. In clinical anticancer efforts, expression level of PTPRO in tumors can not only serve as a biomarker to monitor the prognosis of patients, but act as an epigenetic biomarker for noninvasive diagnosis. In addition, the re-activation of PTPRO in tumor tissues, not only can induce tumor volume reduction, but also enhance the susceptibility to chemotherapy drugs. So, we can propose that these research findings of PTPRO will not only support new study ideas and directions for other tumor- suppressors, importantly, but also supply a theoretical basis for researching new molecular targeting agents in the future.
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Affiliation(s)
- Man-Man Kang
- The Center of Radiation Oncology, the 82th Hospital of People's Liberation Army of China, Huaian, Jiangsu, China E-mail : ,
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46
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Tao S, Tillotson J, Wijeratne EMK, Xu YM, Kang M, Wu T, Lau EC, Mesa C, Mason DJ, Brown RV, Clair JJL, Gunatilaka AAL, Zhang DD, Chapman E. Withaferin A Analogs That Target the AAA+ Chaperone p97. ACS Chem Biol 2015; 10:1916-1924. [PMID: 26006219 PMCID: PMC4593394 DOI: 10.1021/acschembio.5b00367] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Understanding the mode of action (MOA) of many natural products can be puzzling with mechanistic clues that seem to lack a common thread. One such puzzle lies in the evaluation of the antitumor properties of the natural product withaferin A (WFA). A variety of seemingly unrelated pathways have been identified to explain its activity, suggesting a lack of selectivity. We now show that WFA acts as an inhibitor of the chaperone, p97, both in vitro and in cell models in addition to inhibiting the proteasome in vitro. Through medicinal chemistry, we have refined the activity of WFA toward p97 and away from the proteasome. Subsequent studies indicated that these WFA analogs retained p97 activity and cytostatic activity in cell models, suggesting that the modes of action reported for WFA could be connected by proteostasis modulation. Through this endeavor, we highlight how the parallel integration of medicinal chemistry with chemical biology offers a potent solution to one of natures' intriguing molecular puzzles.
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Affiliation(s)
- Shasha Tao
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Joseph Tillotson
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - E. M. Kithsiri Wijeratne
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Ya-ming Xu
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - MinJin Kang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Tongde Wu
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Eric C. Lau
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Celestina Mesa
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Damian J. Mason
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - Robert V. Brown
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - James J. La Clair
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States
| | - A. A. Leslie Gunatilaka
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Donna D. Zhang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States,Corresponding Authors.
| | - Eli Chapman
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, P.O. Box 210207, Tucson, Arizona 85721, United States,Corresponding Authors.
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UBXN2A regulates nicotinic receptor degradation by modulating the E3 ligase activity of CHIP. Biochem Pharmacol 2015; 97:518-530. [PMID: 26265139 DOI: 10.1016/j.bcp.2015.08.084] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/05/2015] [Indexed: 12/13/2022]
Abstract
Neuronal nicotinic acetylcholine receptors (nAChRs) containing the α3 subunit are known for their prominent role in normal ganglionic transmission while their involvement in the mechanisms underlying nicotine addiction and smoking-related disease has been emerging only in recent years. The amount of information available on the maturation and trafficking of α3-containing nAChRs is limited. We previously showed that UBXN2A is a p97 adaptor protein that facilitates the maturation and trafficking of α3-containing nAChRs. Further investigation of the mechanisms of UBXN2A actions revealed that the protein interacts with CHIP (carboxyl terminus of Hsc70 interacting protein), whose ubiquitin E3 ligase activity regulates the degradation of several disease-related proteins. We show that CHIP displays E3 ligase activity toward the α3 nAChR subunit and contributes to its ubiquitination and subsequent degradation. UBXN2A interferes with CHIP-mediated ubiquitination of α3 and protects the nicotinic receptor subunit from endoplasmic reticulum associated degradation (ERAD). UBXN2A also cross-talks with VCP/p97 and HSC70/HSP70 proteins in a complex where α3 is likely to be targeted by CHIP. Overall,we identify CHIP as an E3 ligase for α3 and UBXN2A as a protein that may efficiently regulate the stability of CHIP's client substrates.
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48
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Local axonal protection by WldS as revealed by conditional regulation of protein stability. Proc Natl Acad Sci U S A 2015. [PMID: 26209654 DOI: 10.1073/pnas.1508337112] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The expression of the mutant Wallerian degeneration slow (WldS) protein significantly delays axonal degeneration from various nerve injuries and in multiple species; however, the mechanism for its axonal protective property remains unclear. Although WldS is localized predominantly in the nucleus, it also is present in a smaller axonal pool, leading to conflicting models to account for the WldS fraction necessary for axonal protection. To identify where WldS activity is required to delay axonal degeneration, we adopted a method to alter the temporal expression of WldS protein in neurons by chemically regulating its protein stability. We demonstrate that continuous WldS activity in the axonal compartment is both necessary and sufficient to delay axonal degeneration. Furthermore, by specifically increasing axonal WldS expression postaxotomy, we reveal a critical period of 4-5 h postinjury during which the course of Wallerian axonal degeneration can be halted. Finally, we show that NAD(+), the metabolite of WldS/nicotinamide mononucleotide adenylyltransferase enzymatic activity, is sufficient and specific to confer WldS-like axon protection and is a likely molecular mediator of WldS axon protection. The results delineate a therapeutic window in which the course of Wallerian degeneration can be delayed even after injures have occurred and help narrow the molecular targets of WldS activity to events within the axonal compartment.
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49
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Li X, Liu H, Fischhaber PL, Tang TS. Toward therapeutic targets for SCA3: Insight into the role of Machado-Joseph disease protein ataxin-3 in misfolded proteins clearance. Prog Neurobiol 2015; 132:34-58. [PMID: 26123252 DOI: 10.1016/j.pneurobio.2015.06.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 05/30/2015] [Accepted: 06/16/2015] [Indexed: 01/09/2023]
Abstract
Machado-Joseph disease (MJD, also known as spinocerebellar ataxia type 3, SCA3), an autosomal dominant neurological disorder, is caused by an abnormal expanded polyglutamine (polyQ) repeat in the ataxin-3 protein. The length of the expanded polyQ stretch correlates positively with the severity of the disease and inversely with the age at onset. To date, we cannot fully explain the mechanism underlying neurobiological abnormalities of this disease. Yet, accumulating reports have demonstrated the functions of ataxin-3 protein in the chaperone system, ubiquitin-proteasome system, and aggregation-autophagy, all of which suggest a role of ataxin-3 in the clearance of misfolded proteins. Notably, the SCA3 pathogenic form of ataxin-3 (ataxin-3(exp)) impairs the misfolded protein clearance via mechanisms that are either dependent or independent of its deubiquitinase (DUB) activity, resulting in the accumulation of misfolded proteins and the progressive loss of neurons in SCA3. Some drugs, which have been used as activators/inducers in the chaperone system, ubiquitin-proteasome system, and aggregation-autophagy, have been demonstrated to be efficacious in the relief of neurodegeneration diseases like Huntington's disease (HD), Parkinson's (PD), Alzheimer's (AD) as well as SCA3 in animal models and clinical trials, putting misfolded protein clearance on the list of potential therapeutic targets. Here, we undertake a comprehensive review of the progress in understanding the physiological functions of ataxin-3 in misfolded protein clearance and how the polyQ expansion impairs misfolded protein clearance. We then detail the preclinical studies targeting the elimination of misfolded proteins for SCA3 treatment. We close with future considerations for translating these pre-clinical results into therapies for SCA3 patients.
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Affiliation(s)
- Xiaoling Li
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongmei Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Paula L Fischhaber
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, CA 91330-8262, USA.
| | - Tie-Shan Tang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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50
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Xiao Y, Li X, Wang H, Wen R, He J, Tang J. Epigenetic regulation of miR-129-2 and its effects on the proliferation and invasion in lung cancer cells. J Cell Mol Med 2015; 19:2172-80. [PMID: 26081366 PMCID: PMC4568922 DOI: 10.1111/jcmm.12597] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/19/2015] [Indexed: 01/11/2023] Open
Abstract
MicroRNAs (miRNAs) play a pivotal role in carcinogenesis. Dysregulation of miRNAs, both oncogenic miRNAs and tumour-suppressive miRNAs, is closely associated with cancer development and progression. The levels of miRNAs could be changed epigenetically by DNA methylation in the 5′ untranslated region (UTR) of pre-mature miRNAs. To investigate whether DNA methylation alters the expression of miR-129 in lung cancer, we did DNA methylation assays and found that 5′ UTR region of miR-129-2 gene was absolutely methylated in both A549 and SPCA-1 lung cancer cells, but totally un-methylated in 95-D cells. The expression of miR-129 was restored by 5-Aza-2’-deoxycytidine (DAC), a de-methylation agent, in both A549 and SPCA-1 cells, resulting in attenuated cell migration and invasion ability, and decreased protein level of NF-κB, which indicates the involvement of NF-κB pathway. To further illustrate the roles of miR-129 in lung tumourigenesis, we overexpressed miR-129 in lung cancer cells by transfection of miR-129 mimics, and found arrested cell proliferation at G2/M phase of cell cycle and inhibited cell invasion. These findings strongly suggest that miR-129 is a tumour suppressive miRNA, playing important roles in the development and progression of human lung cancer.
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Affiliation(s)
- Yingying Xiao
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Xiaoxia Li
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Haoli Wang
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Ruiling Wen
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Juan He
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Jun Tang
- KingMed Diagnostics and KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
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