CHARGE syndrome: a recurrent hotspot of mutations in CHD7 IVS25 analyzed by bioinformatic tools and minigene assays.
Eur J Hum Genet
; 26(2): 287-292, 2018 02.
Article
en En
| MEDLINE
| ID: mdl-29255276
ABSTRACT
CHARGE syndrome is a rare genetic disorder mainly due to de novo and private truncating mutations of CHD7 gene. Here we report an intriguing hot spot of intronic mutations (c.5405-7G > A, c.5405-13G > A, c.5405-17G > A and c.5405-18C > A) located in CHD7 IVS25. Combining computational in silico analysis, experimental branch-point determination and in vitro minigene assays, our study explains this mutation hot spot by a particular genomic context, including the weakness of the IVS25 natural acceptor-site and an unconventional lariat sequence localized outside the common 40 bp upstream the acceptor splice site. For each of the mutations reported here, bioinformatic tools indicated a newly created 3' splice site, of which the existence was confirmed using pSpliceExpress, an easy-to-use and reliable splicing reporter tool. Our study emphasizes the idea that combining these two complementary approaches could increase the efficiency of routine molecular diagnosis.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
ADN Helicasas
/
Sitios de Empalme de ARN
/
Proteínas de Unión al ADN
/
Síndrome CHARGE
/
Mutación
Límite:
Child
/
Humans
/
Male
Idioma:
En
Revista:
Eur J Hum Genet
Asunto de la revista:
GENETICA MEDICA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Francia