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Heterozygosity for an exon 12 splicing mutation and a W234G missense mutation in an American child with chronic tyrosinemia type 1.

Authors
Hahn, SH  | Krasnewich, D | Brantly, M | Kvittingen, EA | Gahl, WA
Citation
Human mutation, 6(1). : 66-73, 1995
Journal Title
Human mutation
ISSN
1059-77941098-1004
Abstract
Hereditary tyrosinemia type 1, an autosomal recessive disorder caused by deficiency of fumarylace-toacetate hydrolase (FAH), manifests in either an acute or a chronic form. We used reverse transcription and the polymerase chain reaction to amplify the FAH cDNA of a 12-year-old American boy with chronic tyrosinemia type 1. The patient is a compound heterozygote for mutations in the FAH gene. One allele contains a missense mutation in codon 234 changing a tryptophan to a glycine; this allele was of maternal origin. Mutagenesis and transfection into COS cells demonstrated that the W234G mutation abolishes FAH activity. The patient's paternally derived allele is a splicing mutation in the +5 position of intron 12, causing either insertion of a 105 bp fragment due to a cryptic splice site, or skipping of exon 12, or skipping of both exons 12 and 13. The chronic phenotype of tyrosinemia type 1 in this patient may be due to some residual, correct splicing by the allele with the splicing mutation.
MeSH

DOI
10.1002/humu.1380060113
PMID
7550234
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Pediatrics & Adolescent Medicine
Ajou Authors
한, 시훈
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