Title

X-Linked chronic granulomatous disease: mutations in the CYBB gene encoding the gp91-phox component of respiratory-burst oxidase

UMMS Affiliation

Department of Pediatrics

Date

6-1998

Document Type

Article

Medical Subject Headings

DNA Mutational Analysis; Genetic Linkage; Granulomatous Disease, Chronic; Humans; Membrane Glycoproteins; Molecular Sequence Data; *Mutation; NADPH Oxidase; Polymorphism, Single-Stranded Conformational; Respiratory Burst; *X Chromosome

Disciplines

Hematology | Oncology | Pediatrics

Abstract

Chronic granulomatous disease (CGD) is a hereditary disorder of host defense due to absent or decreased activity of phagocyte NADPH oxidase. The X-linked form of the disease derives from defects in the CYBB gene, which encodes the 91-kD glycoprotein component (termed "gp91-phox") of the oxidase. We have identified the mutations in the CYBB gene responsible for X-linked CGD in 131 consecutive independent kindreds. Screening by SSCP analysis identified mutations in 124 of the kindreds, and sequencing of all exons and intron boundary regions revealed the other seven mutations. We detected 103 different specific mutations; no single mutation appeared in more than seven independent kindreds. The types of mutations included large and small deletions (11%), frameshifts (24%), nonsense mutations (23%), missense mutations (23%), splice-region mutations (17%), and regulatory-region mutations (2%). The distribution of mutations within the CYBB gene exhibited great heterogeneity, with no apparent mutational hot spots. Evaluation of 87 available mothers revealed X-linked carrier status in all but 10. The heterogeneity of mutations and the lack of any predominant genotype indicate that the disease represents many different mutational events, without a founder effect, as is expected for a disorder with a previously lethal phenotype.

Rights and Permissions

Citation: Am J Hum Genet. 1998 Jun;62(6):1320-31. doi 10.1086/301874

Related Resources

Link to article in PubMed

PubMed ID

9585602