Suppressive interactions between mutations located in the two nucleotide binding domains of CFTR.
FEBS Lett
; 473(2): 149-53, 2000 May 12.
Article
em En
| MEDLINE
| ID: mdl-10812063
ABSTRACT
The S1235R locus in CFTR was studied in combination with alleles found at the M470V and G628R loci. While R628 caused a maturational defect, R1235 did not. The impact of R1235 was found to be influenced by the alleles present at the G628R and M470V loci. At the single channel level, R1235-V (R1235 on a V470 background) was characterized by an open probability significantly higher than V470-wildtype CFTR. M470, which on its own increases CFTR chloride transport activity when compared to V470-wildtype CFTR, suppressed the activity of R1235 in such a way that a protein with an open probability not significantly different from V470-wildtype CFTR was obtained. While R628-V CFTR had similar current densities as V470-wildtype CFTR in Xenopus laevis oocytes, R1235-V resulted in current densities that were more than twofold higher than those of V470-wildtype CFTR. However, the current densities generated by R1235/R628-V (R1235 and R628 on a V470 background) CFTR were significant lower than R1235-V or R628-V CFTR.
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Base de dados:
MEDLINE
Assunto principal:
Supressão Genética
/
Regulador de Condutância Transmembrana em Fibrose Cística
Limite:
Animals
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Bélgica