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Cited by 231Sexual Differentiation and DisordersAdrenal Hormones and DisordersGenomic variations and chromosomal abnormalities

The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.

Characterization of frequent deletions causing steroid 21-hydroxylase deficiency

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White, P C, Vitek, A, Dupont, B, New, M I·1988·Proceedings of the National Academy of Sciences
DOI 10.1073/pnas.85.12.4436PMC PMC280444
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Abstract

Steroid 21-hydroxylase deficiency is caused by mutations in the CYP21B gene. This gene and a highly homologous pseudogene, CYP21A, alternate with the C4A and C4B genes encoding the fourth component of complement. Classical deficiency alleles are frequently caused by deletions of CYP21B or by gene conversions that transfer deleterious mutations from the CYP21A pseudogene to CYP21B. Gene conversions involving restriction enzyme sites that distinguish CYP21A [e.g., 3.2-kilobase (kb) Taq I fragment] and CYP21B (3.7-kb Taq I fragment) might be confused with actual deletions of CYP21B. To determine the incidence of this type of gene conversion, 15 chromosomes (in 13 families) with absent 3.7-kb Taq I fragments were studied. When hybridized with a 21-hydroxylase probe, all of these chromosomes were associated with absent 2.9-kb Kpn I fragments, 14 of 15 were associated with absent 2.4-kb Bgl II/EcoRI fragments, and 13 of 15 were associated with absent 10-kb Bgl II/EcoRI and 12-kb EcoRI fragments. Thirteen of 15 chromsomes had absent 6.0- or 5.4-kb Taq I fragments when hybridized with a C4 probe. Thus, 2 of 15 chromosomes do not carry deletions and may represent gene conversions; 13 of 15 chromosomes studied have a deletion of approximately equal to 30 kb, leaving behind the C4A gene and a single CYP21A-like gene. Hybridization with specific oligonucleotide probes showed that in all 13 cases this remaining CYP21 gene carried an 8-base-pair deletion, typical of CYP21A, that prevents synthesis of a functional protein. Thus, gene conversions are rarely confused with deletions as a cause of 21-hydroxylase deficiency.

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Metadata

Authors
White, P. C., Vitek, A., Dupont, B., & New, M. I.
Affiliations
Cornell University (US)
ORCID
Venue
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences
Published
1988-06
Volume
85
Issue
12
Pages
4436-4440
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
DOI
10.1073/pnas.85.12.4436
PMC
PMC280444
OpenAlex
W1986580467
Cited by
229
References
26
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 3 · 2016: 3 · 2015: 2 · 2014: 5 · 2013: 7 · 2012: 4
FWCI
4.88
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA 22507)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-37867)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 00072)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Sexual Differentiation and Disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
21-hydroxylase deficiency, gene conversion, congenital adrenal hyperplasia
MeSH terms
Adrenal Hyperplasia, Congenital, Chromosome Deletion, Female, Gene Conversion, Genes, Haplotypes, Humans, Male, Nucleic Acid Hybridization, Plasmids, Steroid Hydroxylases, Steroid 21-Hydroxylase

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