A heterozygous 4-bp deletion mutation in the Gsα gene (GNAS1) in a patient with albright hereditary osteodystrophy

Lee S. Weinstein, Pablo V. Gejman, Philippe de Mazancourt, Nadine American, Allen M. Spiegel

Research output: Contribution to journalArticle

77 Scopus citations

Abstract

Several heterozygous mutations within the gene encoding the α-subunit of Gs (GNAS1), the G protein that stimulates adenylyl cyclase, have been previously identified in patients with Albright hereditary osteodystrophy (AHO). We have now identified a fourth GNAS1 mutation from an AHO patient. Amplification by the polymerase chain reaction (PCR) of a genomic fragment encompassing GNAS1 exons 7 and 8 from one patient resulted in a product with aberrant migration on nondematuring polyacrylamide and agarose gels. Direct DNA sequencing identified a 4-bp deletion in one allele of exon 7 encoding a frameshift with a premature stop codon. Analysis of lymphocyte RNA by reverse transcription-PCR and direct sequencing showed that the GNAS1 allele bearing the mutation is not expressed as mRNA. Consistent with this, Northern analysis revealed an approximate 50% deficiency in steady-state levels of GNAS1 mRNA. These findings further illustrate the heterogeneity of GNAS1 gene defects in AHO.

Original languageEnglish (US)
Pages (from-to)1319-1321
Number of pages3
JournalGenomics
Volume13
Issue number4
DOIs
StatePublished - Aug 1992
Externally publishedYes

ASJC Scopus subject areas

  • Genetics

Fingerprint Dive into the research topics of 'A heterozygous 4-bp deletion mutation in the G<sub>s</sub>α gene (GNAS1) in a patient with albright hereditary osteodystrophy'. Together they form a unique fingerprint.

  • Cite this