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Type: Artigo de periódico
Title: H28+C insertion in the CYP21 gene: A novel frameshift mutation in a Brazilian patient with the classical form of 21-hydroxylase deficiency
Author: Lau, IF
Soardi, FC
Lemos-Marini, SHV
Guerra, G
Baptista, MTM
De Mello, MP
Abstract: In the classical form of 21-hydroxylase deficiency, CYP21-affected genes either carry mutations present in the CYP21P pseudogene (microconversions) or bear a chimeric gene that replaces the active gene as a result of large conversion or deletion mutational events. Previous genotyping of 41 Brazilian patients revealed 64% microconversion, whereas deletions and large gene conversions accounted for up to 21% of the molecular defect. The present paper describes a new mutation disclosed by sequencing an entire gene in which no pseudogene-originated mutation had been found. The patient with the classical form of 21-hydroxylase deficiency is the daughter of a consanguineous marriage, and she is homozygous for a novel frameshift H28+C within exon 1. The mutation causes a stop codon at amino acid 78. Both parents are heterozygous for the mutation as confirmed by allele-specific oligonucleotide PCR. The H28+C is not present in the published CYP21P sequences and is likely to result in an enzyme with no activity.
Country: EUA
Editor: Endocrine Soc
Citation: Journal Of Clinical Endocrinology & Metabolism. Endocrine Soc, v. 86, n. 12, n. 5877, n. 5880, 2001.
Rights: embargo
Identifier DOI: 10.1210/jc.86.12.5877
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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