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Cited by 189

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Characterization of the Properties of a Novel Mutation in VAPB in Familial Amyotrophic Lateral Sclerosis

Open access
Chen, Han-Jou, Anagnostou, Georgia, Chai, Andrea, Withers, James, Morris, Alex, Adhikaree, Jason, Pennetta, Giuseppa, de Belleroche, Jackie S.·2010·Journal of Biological Chemistry

Abstract

Following the mutation screening of genes known to cause amyotrophic lateral sclerosis (ALS) in index cases from 107 familial ALS (FALS) kindred, a point mutation was identified in vesicle-associated membrane protein-associated protein B (VAPB), or VAMP-associated protein B, causing an amino acid change from threonine to isoleucine at codon 46 (T46I) in one FALS case but not in 257 controls. This is an important finding because it is only the second mutation identified in this gene that causes ALS. In order to investigate the pathogenic effects of this mutation, we have used a motor neuron cell line and tissue-specific expression of the mutant protein in Drosophila. We provide substantial evidence for the pathogenic effects of this mutation in abolishing the effect of wild type VAPB in the unfolded protein response, promoting ubiquitin aggregate formation, and activating neuronal cell death. We also report that expression of the mutant protein in the Drosophila motor system induces aggregate deposition, endoplasmic reticulum disorganization, and chaperone up-regulation both in neurons and in muscles. Our integrated analysis of the pathogenic effect of the T46I mutation and the previously identified P56S mutation indicate extensive commonalities in the disease mechanism for these two mutations. In summary, we show that this newly identified mutation in human FALS has a pathogenic effect, supporting and reinforcing the role of VAPB as a causative gene of ALS.

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Metadata

Authors
Chen, H.-J., Anagnostou, G., Chai, A., Withers, J., Morris, A., Adhikaree, J., Pennetta, G., & de Belleroche, J. S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-12
Volume
285
Issue
51
Pages
40266-40281
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2117168196
Cited by
189
References
8
FWCI
9.72
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Characterization of the Properties of a Novel Mutation in VAPB in Familial Amyotrophic Lateral Sclerosis. https://app.cochat.ai/papers/10.1074/jbc.m110.161398
The paper
Chen, H.-J., Anagnostou, G., Chai, A., Withers, J., Morris, A., Adhikaree, J., Pennetta, G., & de Belleroche, J. S. (2010). Characterization of the Properties of a Novel Mutation in VAPB in Familial Amyotrophic Lateral Sclerosis. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m110.161398

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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