Journal
EMBO REPORTS
Volume 17, Issue 9, Pages 1326-1342Publisher
WILEY
DOI: 10.15252/embr.201541726
Keywords
amyotrophic lateral sclerosis; frontotemporal dementia; glycogen synthase kinase-3; protein tyrosine phosphatase interacting protein 51; vesicle-associated membrane protein-associated protein B
Categories
Funding
- UK Medical Research Council
- Alzheimer's Research UK
- Wellcome Trust
- Motor Neurone Disease Association
- Parkinson's UK
- Rosetrees Trust
- Alzheimers Research UK [ARUK-EG2013B-1, ARUK-PG2014-5] Funding Source: researchfish
- Medical Research Council [MR/M013251/1, G0501573, MR/K005146/1] Funding Source: researchfish
- Parkinson's UK [G-1308] Funding Source: researchfish
- Rosetrees Trust [M451] Funding Source: researchfish
- MRC [G0501573, MR/K005146/1, MR/M013251/1] Funding Source: UKRI
Ask authors/readers for more resources
Defective FUS metabolism is strongly associated with amyotrophic lateral sclerosis and frontotemporal dementia (ALS/FTD), but the mechanisms linking FUS to disease are not properly understood. However, many of the functions disrupted in ALS/FTD are regulated by signalling between the endoplasmic reticulum (ER) and mitochondria. This signalling is facilitated by close physical associations between the two organelles that are mediated by binding of the integral ER protein VAPB to the outer mitochondrial membrane protein PTPIP51, which act as molecular scaffolds to tether the two organelles. Here, we show that FUS disrupts the VAPB-PTPIP51 interaction and ER-mitochondria associations. These disruptions are accompanied by perturbation of Ca2+ uptake by mitochondria following its release from ER stores, which is a physiological read-out of ER-mitochondria contacts. We also demonstrate that mitochondrial ATP production is impaired in FUS-expressing cells; mitochondrial ATP production is linked to Ca2+ levels. Finally, we demonstrate that the FUS-induced reductions to ER-mitochondria associations and are linked to activation of glycogen synthase kinase-3 (GSK-3), a kinase already strongly associated with ALS/FTD.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available