TorsinA and heat shock proteins act as molecular chaperones: suppression of alpha-synuclein aggregation.
J Neurochem
; 83(4): 846-54, 2002 Nov.
Article
em En
| MEDLINE
| ID: mdl-12421356
ABSTRACT
TorsinA, a protein with homology to yeast heat shock protein104, has previously been demonstrated to colocalize with alpha-synuclein in Lewy bodies, the pathological hallmark of Parkinson's disease. Heat shock proteins are a family of chaperones that are both constitutively expressed and induced by stressors, and that serve essential functions for protein refolding and/or degradation. Here, we demonstrate that, like torsinA, specific molecular chaperone heat shock proteins colocalize with alpha-synuclein in Lewy bodies. In addition, using a cellular model of alpha-synuclein aggregation, we demonstrate that torsinA and specific heat shock protein molecular chaperones colocalize with alpha-synuclein immunopositive inclusions. Further, overexpression of torsinA and specific heat shock proteins suppress alpha-synuclein aggregation in this cellular model, whereas mutant torsinA has no effect. These data suggest that torsinA has chaperone-like activity and that the disease-associated GAG deletion mutant has a loss-of-function phenotype. Moreover, these data support a role for chaperone proteins, including torsinA and heat shock proteins, in cellular responses to neurodegenerative inclusions.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Transporte
/
Chaperonas Moleculares
/
Doença por Corpos de Lewy
/
Proteínas de Choque Térmico
/
Proteínas do Tecido Nervoso
Limite:
Humans
Idioma:
En
Revista:
J Neurochem
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Estados Unidos