Deletions of variable size involving one or more exons, 29 different missense, nonsense, or frameshift mutations, and three polymorphisms have been found in patients with ornithine transcarbamylase (OTC) deficiency. Most of the deletions and mutations were found in patients with severe disease manif
Mutations and polymorphisms in the human ornithine transcarbamylase gene: Mutation update addendum
β Scribed by Mendel Tuchman; Robert J. Plante
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 273 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1059-7794
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β¦ Synopsis
This mutation update addendum summarizes 30 new mutations and polymorphisms found in the ornithine transcarbamylase (OTC) gene since the publication in this journal of the first mutation update. Thus, more than 60 mutations and polymorphisms in the OTC gene are currently known. Most of the mutations have been seen in a single family and the few recurrent mutations occurred in CpG dinucleotides. The presumed deleterious effects of most mutations await confirmation by appropriate expression studies. Once the tertiary structure of the enzyme is fully known, and the functional domains established, the effects of mutations, or lack thereof, could be better predicted.
π SIMILAR VOLUMES
Ornithine transcarbamylase (OTC) deficiency is the most common inherited disorder of the urea cycle and is transmitted as an X-linked trait. Defects in the OTC gene cause a block in ureagenesis resulting in hyperammonemia, which can lead to brain damage and death. Three previous mutation updates for