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Genetic modulation of polyglutamine toxicity by protein conjugation pathways in Drosophila

Chan, H.Y. E.·2002·Human Molecular Genetics

Abstract

Spinal and bulbar muscular atrophy (SBMA) is a heritable neurodegenerative disease caused by the expansion of a polyglutamine [poly(Q)] repeat within the androgen receptor (AR) protein. We studied SBMA in Drosophila using an N-terminal fragment of the human AR protein. Expression of a pathogenic AR protein with an expanded poly(Q) repeat in Drosophila results in nuclear and cytoplasmic inclusion formation, and cellular degeneration, preferentially in neuronal tissues. We have studied the influence of ubiquitin-dependent modification and the proteasome pathway on neural degeneration and AR protein fragment solubility. Compromising the ubiquitin/proteasome pathway enhances degeneration and decreases poly(Q) protein solubility. Our data further suggest that Hsp70 and the proteasome act in an additive manner to modulate neurodegeneration. Through the over-expression of a mutant of the SUMO-1 activating enzyme Uba2, we further show that poly(Q)-induced degeneration is intensified when the cellular SUMO-1 protein conjugation pathway is altered. These data suggest that post-translational protein modification, including the ubiquitin/proteasome and the SUMO-1 pathways, modulate poly(Q) pathogenesis.

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Metadata

Authors
Chan, H. Y. E.
Venue
Human Molecular Genetics
Published
2002-11-01
Volume
11
Issue
23
Pages
2895-2904
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2155438201
Cited by
161
References
6
FWCI
5.30
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Genetic modulation of polyglutamine toxicity by protein conjugation pathways in Drosophila. https://app.cochat.ai/papers/10.1093/hmg/11.23.2895
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Chan, H. Y. E. (2002). Genetic modulation of polyglutamine toxicity by protein conjugation pathways in Drosophila. Human Molecular Genetics. https://doi.org/10.1093/hmg/11.23.2895

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