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Type: Artigo de periódico
Title: New Frameshift Mutation In The 5alpha-reductase Type 2 Gene In A Brazilian Patient With 5alpha-reductase Deficiency.
Author: Ferraz, L F
Mathias Baptista, M T
Maciel-Guerra, A T
Júnior, G G
Hackel, C
Abstract: Male pseudohermaphroditism caused by steroid 5alpha-reductase deficiency is an autosomal recessive disorder. The enzyme steroid 5alpha-reductase 2 (encoded by the SRD5A2 gene) catalyses the conversion of testosterone to dihydrotestosterone, which is required for normal differentiation of the external male genitalia. This report describes the molecular analysis of the 5alpha-reductase type 2 gene in a Brazilian patient who was raised as a female, underwent a reversal of gender role behavior, and is now a married man. This patient is a compound heterozygote bearing an A-->G mutation within exon 2, changing codon 126 from Glu to Arg on one allele and a novel single base deletion (418delT) causing a frameshift mutation at codon 140 in the same exon, on the other allele. This last mutation probably leads to the synthesis of a truncated protein, because a premature termination signal is created at codon 159.
Subject: 3-oxo-5-alpha-steroid 4-dehydrogenase
Amino Acid Sequence
Amino Acid Substitution
Base Sequence
Disorders Of Sex Development
Frameshift Mutation
Gender Identity
Genes, Recessive
Infant, Newborn
Molecular Sequence Data
Point Mutation
Sequence Deletion
Sexual Behavior
Terminator Regions, Genetic
Citation: American Journal Of Medical Genetics. v. 87, n. 3, p. 221-5, 1999-Nov.
Rights: fechado
Identifier DOI: 
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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