Bocharova N, Chave-Cox R, Sokolov S, Knorre D, Severin F. Protein aggregation and neurodegeneration: clues from a yeast model of Huntington's disease.
Biochemistry (Mosc) 2009;
74:231-234. [PMID:
19267681 DOI:
10.1134/s0006297909020163]
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Abstract
A number of neurodegenerative diseases are accompanied by the appearance of intracellular protein aggregates. Huntington's disease (HD) is caused by a mutation in a gene encoding huntingtin. The mutation causes the expansion of the polyglutamine (polyQ) domain and consequently polyQ-containing aggregates accumulate and neurons in the striatum die. The role of the aggregates is still not clear: they may be the cause of cytotoxicity or a manifestation of the cellular attempt to remove the misfolded proteins. There is accumulating evidence that the main cause of HD is the interaction of the mutated huntingtin with other polyQ-containing proteins and molecular chaperones and most studies based on a yeast model of HD support this point of view. Data obtained using yeasts suggest pathological consequences of polyQ-proteasomal interaction: proteasomal overload by polyQs may interfere with functions of the cell cycle-regulating proteins.
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