3
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Moncrief T, Matheny CJ, Gaziova I, Miller JM, Qadota H, Benian GM, Oberhauser AF. Mutations in conserved residues of the myosin chaperone UNC-45 result in both reduced stability and chaperoning activity. Protein Sci 2021; 30:2221-2232. [PMID: 34515376 DOI: 10.1002/pro.4180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/17/2021] [Accepted: 09/02/2021] [Indexed: 01/22/2023]
Abstract
Proper muscle development and function depend on myosin being properly folded and integrated into the thick filament structure. For this to occur the myosin chaperone UNC-45, or UNC-45B, must be present and able to chaperone myosin. Here we use a combination of in vivo C. elegans experiments and in vitro biophysical experiments to analyze the effects of six missense mutations in conserved regions of UNC-45/UNC-45B. We found that the phenotype of paralysis and disorganized thick filaments in 5/6 of the mutant nematode strains can likely be attributed to both reduced steady state UNC-45 protein levels and reduced chaperone activity. Interestingly, the biophysical assays performed on purified proteins show that all of the mutations result in reduced myosin chaperone activity but not overall protein stability. This suggests that these mutations only cause protein instability in the in vivo setting and that these conserved regions may be involved in UNC-45 protein stability/regulation via posttranslational modifications, protein-protein interactions, or some other unknown mechanism.
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Affiliation(s)
- Taylor Moncrief
- Department of Neuroscience, Cell Biology and Anatomy, Emory University, Atlanta, Georgia
| | | | - Ivana Gaziova
- Department of Neuroscience, Cell Biology and Anatomy, Emory University, Atlanta, Georgia
| | - John M Miller
- Department of Biochemistry and Molecular Biology, Emory University, Atlanta, Georgia
| | - Hiroshi Qadota
- Department of Pathology, Emory University, Atlanta, Georgia
| | - Guy M Benian
- Department of Pathology, Emory University, Atlanta, Georgia
| | - Andres F Oberhauser
- Department of Neuroscience, Cell Biology and Anatomy, Emory University, Atlanta, Georgia.,Department of Biochemistry and Molecular Biology, Emory University, Atlanta, Georgia.,Sealy Center for Structural Biology and Molecular Biophysics, University of Texas Medical Branch, Galveston, Texas
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4
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Donkervoort S, Kutzner CE, Hu Y, Lornage X, Rendu J, Stojkovic T, Baets J, Neuhaus SB, Tanboon J, Maroofian R, Bolduc V, Mroczek M, Conijn S, Kuntz NL, Töpf A, Monges S, Lubieniecki F, McCarty RM, Chao KR, Governali S, Böhm J, Boonyapisit K, Malfatti E, Sangruchi T, Horkayne-Szakaly I, Hedberg-Oldfors C, Efthymiou S, Noguchi S, Djeddi S, Iida A, di Rosa G, Fiorillo C, Salpietro V, Darin N, Fauré J, Houlden H, Oldfors A, Nishino I, de Ridder W, Straub V, Pokrzywa W, Laporte J, Foley AR, Romero NB, Ottenheijm C, Hoppe T, Bönnemann CG. Pathogenic Variants in the Myosin Chaperone UNC-45B Cause Progressive Myopathy with Eccentric Cores. Am J Hum Genet 2020; 107:1078-1095. [PMID: 33217308 DOI: 10.1016/j.ajhg.2020.11.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/03/2020] [Indexed: 01/03/2023] Open
Abstract
The myosin-directed chaperone UNC-45B is essential for sarcomeric organization and muscle function from Caenorhabditis elegans to humans. The pathological impact of UNC-45B in muscle disease remained elusive. We report ten individuals with bi-allelic variants in UNC45B who exhibit childhood-onset progressive muscle weakness. We identified a common UNC45B variant that acts as a complex hypomorph splice variant. Purified UNC-45B mutants showed changes in folding and solubility. In situ localization studies further demonstrated reduced expression of mutant UNC-45B in muscle combined with abnormal localization away from the A-band towards the Z-disk of the sarcomere. The physiological relevance of these observations was investigated in C. elegans by transgenic expression of conserved UNC-45 missense variants, which showed impaired myosin binding for one and defective muscle function for three. Together, our results demonstrate that UNC-45B impairment manifests as a chaperonopathy with progressive muscle pathology, which discovers the previously unknown conserved role of UNC-45B in myofibrillar organization.
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Affiliation(s)
- Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Carl E Kutzner
- Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, 50931 Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Ying Hu
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Xavière Lornage
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U1258, CNRS UMR7104, Université de Strasbourg, BP 10142, 67404 Illkirch, France
| | - John Rendu
- Centre Hospitalier Universitaire de Grenoble Alpes, Biochimie Génétique et Moléculaire, Grenoble 38000, France; Grenoble Institut des Neurosciences-INSERM U1216 UGA, Grenoble 38000, France
| | - Tanya Stojkovic
- Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France, Institut de Myologie, GHU La Pitié-Salpêtrière, Sorbonne Université, AP-HP, 75013 Paris, France
| | - Jonathan Baets
- Faculty of Medicine, University of Antwerp, 2610 Antwerp, Belgium; Laboratory of Neuromuscular Pathology, Institute Born-Bunge, University of Antwerp, 2610 Antwerp, Belgium; Neuromuscular Reference Centre, Department of Neurology, Antwerp University Hospital, 2650 Antwerp, Belgium
| | - Sarah B Neuhaus
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jantima Tanboon
- Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 10700 Bangkok, Thailand; Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 187-8502 Tokyo, Japan
| | - Reza Maroofian
- Department of Neuromuscular Disorders, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Véronique Bolduc
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Magdalena Mroczek
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK
| | - Stefan Conijn
- Department of Physiology, Amsterdam UMC (location VUmc), 1081 HZ Amsterdam, the Netherlands
| | - Nancy L Kuntz
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Ana Töpf
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK
| | - Soledad Monges
- Servicio de Neurología y Servicio de Patologia, Hospital de Pediatría Garrahan, C1245 AAM Buenos Aires, Argentina
| | - Fabiana Lubieniecki
- Servicio de Neurología y Servicio de Patologia, Hospital de Pediatría Garrahan, C1245 AAM Buenos Aires, Argentina
| | - Riley M McCarty
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Katherine R Chao
- Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Serena Governali
- Department of Physiology, Amsterdam UMC (location VUmc), 1081 HZ Amsterdam, the Netherlands
| | - Johann Böhm
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U1258, CNRS UMR7104, Université de Strasbourg, BP 10142, 67404 Illkirch, France
| | - Kanokwan Boonyapisit
- Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol, University, 10700 Bangkok, Thailand
| | - Edoardo Malfatti
- Neurology Department, Raymond-Poincaré teaching hospital, centre de référence des maladies neuromusculaires Nord/Est/Ile-de-France, AP-HP, 92380 Garches, France
| | - Tumtip Sangruchi
- Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, 10700 Bangkok, Thailand
| | | | - Carola Hedberg-Oldfors
- Department of Laboratory Medicine, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Stephanie Efthymiou
- Department of Neuromuscular Disorders, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Satoru Noguchi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 187-8502 Tokyo, Japan; Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry, 187-8551 Tokyo, Japan
| | - Sarah Djeddi
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U1258, CNRS UMR7104, Université de Strasbourg, BP 10142, 67404 Illkirch, France
| | - Aritoshi Iida
- Department of Clinical Genome Analysis, Medical Genome Center, National Center of Neurology and Psychiatry, 187-8551 Tokyo, Japan
| | - Gabriella di Rosa
- Division of Child Neurology and Psychiatry, Department of the Adult and Developmental Age Human Pathology, University of Messina, Messina 98125, Italy
| | - Chiara Fiorillo
- Pediatric Neurology and Muscular Diseases Unit, G. Gaslini Institute, 16147 Genoa, Italy; Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, 16132 Genoa, Italy
| | - Vincenzo Salpietro
- Pediatric Neurology and Muscular Diseases Unit, G. Gaslini Institute, 16147 Genoa, Italy; Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, 16132 Genoa, Italy
| | - Niklas Darin
- Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, 41650 Gothenburg, Sweden
| | - Julien Fauré
- Centre Hospitalier Universitaire de Grenoble Alpes, Biochimie Génétique et Moléculaire, Grenoble 38000, France; Grenoble Institut des Neurosciences-INSERM U1216 UGA, Grenoble 38000, France
| | - Henry Houlden
- Department of Neuromuscular Disorders, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Anders Oldfors
- Department of Laboratory Medicine, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 187-8502 Tokyo, Japan; Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry, 187-8551 Tokyo, Japan; Department of Clinical Genome Analysis, Medical Genome Center, National Center of Neurology and Psychiatry, 187-8551 Tokyo, Japan
| | - Willem de Ridder
- Faculty of Medicine, University of Antwerp, 2610 Antwerp, Belgium; Laboratory of Neuromuscular Pathology, Institute Born-Bunge, University of Antwerp, 2610 Antwerp, Belgium; Neuromuscular Reference Centre, Department of Neurology, Antwerp University Hospital, 2650 Antwerp, Belgium
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK; Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne NE7 7DN, UK
| | - Wojciech Pokrzywa
- Laboratory of Protein Metabolism in Development and Aging, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U1258, CNRS UMR7104, Université de Strasbourg, BP 10142, 67404 Illkirch, France
| | - A Reghan Foley
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Norma B Romero
- Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France, Institut de Myologie, GHU La Pitié-Salpêtrière, Sorbonne Université, AP-HP, 75013 Paris, France; Université Sorbonne, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center for Research in Myology, GH Pitié-Salpêtrière, 75651 Paris, France; Neuromuscular Morphology Unit, Myology Institute, GHU Pitié-Salpêtrière, 75013 Paris, France
| | - Coen Ottenheijm
- Department of Physiology, Amsterdam UMC (location VUmc), 1081 HZ Amsterdam, the Netherlands; Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ 85718, USA
| | - Thorsten Hoppe
- Institute for Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, 50931 Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany.
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.
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7
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Winter L, Unger A, Berwanger C, Spörrer M, Türk M, Chevessier F, Strucksberg KH, Schlötzer-Schrehardt U, Wittig I, Goldmann WH, Marcus K, Linke WA, Clemen CS, Schröder R. Imbalances in protein homeostasis caused by mutant desmin. Neuropathol Appl Neurobiol 2018; 45:476-494. [PMID: 30179276 DOI: 10.1111/nan.12516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022]
Abstract
AIMS We investigated newly generated immortalized heterozygous and homozygous R349P desmin knock-in myoblasts in conjunction with the corresponding desminopathy mice as models for desminopathies to analyse major protein quality control processes in response to the presence of R349P mutant desmin. METHODS We used hetero- and homozygous R349P desmin knock-in mice for analyses and for crossbreeding with p53 knock-out mice to generate immortalized R349P desmin knock-in skeletal muscle myoblasts and myotubes. Skeletal muscle sections and cultured muscle cells were investigated by indirect immunofluorescence microscopy, proteasomal activity measurements and immunoblotting addressing autophagy rate, chaperone-assisted selective autophagy and heat shock protein levels. Muscle sections were further analysed by transmission and immunogold electron microscopy. RESULTS We demonstrate that mutant desmin (i) increases proteasomal activity, (ii) stimulates macroautophagy, (iii) dysregulates the chaperone assisted selective autophagy and (iv) elevates the protein levels of αB-crystallin and Hsp27. Both αB-crystallin and Hsp27 as well as Hsp90 displayed translocation patterns from Z-discs as well as Z-I junctions, respectively, to the level of sarcomeric I-bands in dominant and recessive desminopathies. CONCLUSIONS Our findings demonstrate that the presence of R349P mutant desmin causes a general imbalance in skeletal muscle protein homeostasis via aberrant activity of all major protein quality control systems. The augmented activity of these systems and the subcellular shift of essential heat shock proteins may deleteriously contribute to the previously observed increased turnover of desmin itself and desmin-binding partners, which triggers progressive dysfunction of the extrasarcomeric cytoskeleton and the myofibrillar apparatus in the course of the development of desminopathies.
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Affiliation(s)
- L Winter
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany.,Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - A Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute for Genetics of Heart Diseases, University Hospital Münster, Münster, Germany
| | - C Berwanger
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - M Spörrer
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - M Türk
- Department of Neurology, University Hospital Erlangen, Erlangen, Germany
| | - F Chevessier
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
| | - K-H Strucksberg
- Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | | | - I Wittig
- Functional Proteomics, SFB815 Core Unit, Medical School, Goethe University, Frankfurt, Germany
| | - W H Goldmann
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - K Marcus
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - W A Linke
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute of Physiology II, University of Münster, Münster, Germany
| | - C S Clemen
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - R Schröder
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
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