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| Pàgina inicial > Articles > Articles publicats > hnRNPDL phase separation is regulated by alternative splicing and disease-causing mutations accelerate its aggregation |
| Data: | 2020 |
| Resum: | Prion-like proteins form multivalent assemblies and phase separate into membraneless organelles. Heterogeneous ribonucleoprotein D-like (hnRNPDL) is a RNA-processing prion-like protein with three alternative splicing (AS) isoforms, which lack none, one, or both of its two disordered domains. It has been suggested that AS might regulate the assembly properties of RNA-processing proteins by controlling the incorporation of multivalent disordered regions in the isoforms. This, in turn, would modulate their activity in the downstream splicing program. Here, we demonstrate that AS controls the phase separation of hnRNPDL, as well as the size and dynamics of its nuclear complexes, its nucleus-cytoplasm shuttling, and amyloidogenicity. Mutation of the highly conserved D378 in the disordered C-terminal prion-like domain of hnRNPDL causes limb-girdle muscular dystrophy 1G. We show that D378H/N disease mutations impact hnRNPDL assembly properties, accelerating aggregation and dramatically reducing the protein solubility in the muscle of Drosophila, suggesting a genetic loss-of-function mechanism for this muscular disorder. |
| Ajuts: | European Commission 648201 Agencia Estatal de Investigación BIO2016-78310-R Ministerio de Economía y Competitividad BIO2015-70092-R Ministerio de Economía y Competitividad BIO2012-31043 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-324 |
| Nota: | Altres ajuts: .V. acknowledges funding from ICREA (ICREA-Academia 2016). IRB Barcelona is the recipient of a Severo Ochoa Award of Excellence from MINECO (government of Spain). C.B. acknowledges funding from "Ministerio de Educación y Formación Profesional |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Hnrnpdl ; Alternative splicing ; Isoforms ; Phase separation ; Aggregation ; Amyloid ; Prion-like ; Disease ; Mutation ; LGMD1G |
| Publicat a: | Cell reports, Vol. 30, issue 4 (Jan. 2020) , p. 1117-1128, ISSN 2211-1247 |
18 p, 3.6 MB |