Dynamin 2 mutations associated with human diseases impair clathrin-mediated receptor endocytosis
Author
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Bitoun, Marc
Author
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Durieux, Anne Cécile
Author
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Prudhon, Bernard
Author
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Bevilacqua, Jorge
Author
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Herledan, Adrien
Author
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Sakanyan, Vehary
Author
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Urtizberea, Andoni
Author
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Cartier Rovirosa, Luis
Author
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Romero, Norma B.
Author
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Guicheney, Pascale
Admission date
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2019-03-11T12:59:04Z
Available date
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2019-03-11T12:59:04Z
Publication date
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2009
Cita de ítem
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Human Mutation, Volumen 30, Issue 10, 2018, Pages 1419-1427
Identifier
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10597794
Identifier
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10981004
Identifier
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10.1002/humu.21086
Identifier
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https://repositorio.uchile.cl/handle/2250/164912
Abstract
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Dynamin 2 (DNM2) is a large GTPase involved in the release of nascent vesicles during endocytosis and intracellular membrane trafficking. Distinct DNM2 mutations, affecting the middle domain (MD) and the Pleckstrin homology domain (PH), have been identified in autosomal dominant centronuclear myopathy (CNM) and in the intermediate and axonal forms of the Charcot-Marie-Tooth peripheral neuropathy (CMT). We report here the first CNM mutation (c.1948G>A, p.E650K) in the DNM2 GTPase effector domain (GED), leading to a slowly progressive moderate myopathy. COS7 cells transfected with DNM2 constructs harboring a disease-associated mutation in MD, PH, or GED show a reduced uptake of transferrin and low-density lipoprotein (LDL) complex, two markers of clathrin-mediated receptor endocytosis. A decrease in clathrin-mediated endocytosis was also identified in skin fibroblasts from one CNM patient. We studied the impact of DNM2 mutant overexpression on epidermal growth factor (EGF)-induced extrac