Functional and structural analysis of four novel mutations of CYP21A2 gene in Italian patients with 21-hydroxylase deficiency.
Horm Metab Res
; 46(7): 515-20, 2014 Jun.
Article
em En
| MEDLINE
| ID: mdl-24799024
ABSTRACT
Congenital adrenal hyperplasia (CAH) is an autosomal recessive disorder mainly caused by defects in the 21-hydroxylase gene (CYP21A2), coding for the enzyme 21-hydroxylase (21-OH). About 95% of the mutations arise from gene conversion between CYP21A2 and the inactive pseudogene CYP21A1P only 5% are novel CYP21A2 mutations, in which functional analysis of mutant enzymes has been helpful to correlate genotype-phenotype. In the present study, we describe 3 novel point mutations (p.L122P, p.Q481X, and p.E161X) in 3 Italian patients with CAH the fourth mutation (p.M150R) was found in the carrier state. Molecular modeling suggests a major impact on 21-hydroxylase activity, and functional analysis after expression in COS-7 cells confirms reduced enzymatic activity of the mutant enzymes. Only the p.M150R mutation affected the activity to a minor extent, associated with NC CAH. CYP21A2 genotyping and functional characterization of each disease-causing mutation has relevance both for treatment and genetic counseling to the patients.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esteroide 21-Hidroxilase
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Hiperplasia Suprarrenal Congênita
/
Mutação
Tipo de estudo:
Prognostic_studies
Limite:
Animals
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Child
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Female
/
Humans
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Male
/
Newborn
País/Região como assunto:
Europa
Idioma:
En
Revista:
Horm Metab Res
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Itália