Dystrophia myotonia: why focus on foci?
Eur J Hum Genet
; 17(5): 543-53, 2009 May.
Article
em En
| MEDLINE
| ID: mdl-19172994
ABSTRACT
Dystrophia myotonia type 1 (DM1; Steinert's disease; myotonic dystrophy) is an autosomal dominant disorder due to a large CTG expansion in the 3'-untranslated region (UTR) of the DM protein kinase (DMPK) gene. Transcription of this gene yields a long CUGn-containing mutant (mut) RNA, in which clinical disease is associated with repeats of n=100-5000. Phenomenologically, the expression of mut RNA is correlated with the morphologic observation of ribonucleoprotein precipitates ('foci') in the nuclei of DMPK-expressing cells. The prevailing view is that the identification of proteins in these foci is the sine qua non of protein-mut RNA interactions. In this viewpoint, I contend that this is an unwarranted inference that falls short in explaining published data. A new model of mut RNA-protein interactions is proposed with distinct binding properties for soluble and insoluble (focus) mut RNA that accommodate these data without exclusions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA Mensageiro
/
Proteínas de Ligação a RNA
/
Proteínas Serina-Treonina Quinases
/
Mutação
/
Distrofia Miotônica
Tipo de estudo:
Qualitative_research
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Eur J Hum Genet
Assunto da revista:
GENETICA MEDICA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Estados Unidos