ALS/FTLD-Linked Mutations in FUS Glycine Residues Cause Accelerated Gelation and Reduced Interactions with Wild-Type FUS.
ALS/FTLD-Linked Mutations in FUS Glycine Residues Cause Accelerated Gelation and Reduced Interactions with Wild-Type FUS.
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DOI:
10.1016/j.molcel.2020.10.014
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发表时间:
2020-11-19
期刊:
影响因子:
16
通讯作者:
Myong S
中科院分区:
文献类型:
--
作者:
Rhine K;Makurath MA;Liu J;Skanchy S;Lopez C;Catalan KF;Ma Y;Fare CM;Shorter J;Ha T;Chemla YR;Myong S
The RNA-binding protein Fused in sarcoma (FUS) can form pathogenic inclusions in neurodegenerative diseases like amyotrophic lateral sclerosis (ALS) and frontotemporal lobar dementia (FTLD). Over 70 mutations in Fus are linked to ALS/FTLD. In patients, all Fus mutations are heterozygous, indicating that the mutant drives disease progression despite the presence of wild-type FUS. Here, we demonstrate that ALS/FTLD-linked FUS mutations in glycine (G) strikingly drive formation of droplets that do not readily interact with wild-type FUS whereas arginine (R) mutants form mixed condensates with wild-type FUS. Remarkably, interactions between wild-type and G mutants are disfavored at the earliest stages of FUS nucleation. In contrast, R mutants physically interact with the wild-type FUS such that wild-type FUS recovers the mutant defects by reducing droplet size and increasing dynamic interactions with RNA. This result suggests disparate molecular mechanisms underlying ALS/FTLD pathogenesis and differing recovery potential depending on the type of mutation. FUS is an RNA binding protein with over seventy mutations linked to the incurable neurodegenerative diseases, ALS/FTLD. Rhine et al demonstrates that FUS mutations in glycine do not associate with the wildtype at all levels while the mutations in arginine interacts with wildtype FUS and thereby recover the mutant defect.
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