Mutation Study of Malaysian Patients with Ornithine Transcarbamylase Deficiency: Clinical, Molecular, and Bioinformatics Analyses of Two Novel Missense Mutations of the OTC Gene. BioMed Research Internationa, 2018 (1). pp. 1-15. ISSN 2314-6141 (2018)
Abstract
Ornithine transcarbamylase deficiency (OTCD), an X-linked disorder that results from mutations in the OTC gene, causes hyperammonemia and leads to various clinical manifestations. Mutations occurring close to the catalytic site of OTCase can cause severe OTCD phenotypes compared with those caused by mutations occurring on the surface of this protein. In this study, we report two novel OTC missense mutations, Q171H and N199H, found in Malaysian patients. Q171H and N199H caused neonatal onset OTCD in a male and late OTCD in a female, respectively. In silico predictions and molecular docking were performed to examine the effect of these novel mutations, and the results were compared with other 30 known OTC mutations. In silico servers predicted that Q171H and N199H, as well as 30 known missense mutations, led to the development of OTCD. Docking analysis indicated that N-(phosphonoacetyl)-L-ornithine (PALO) was bound to the catalytic site of OTCase mutant structure with minimal conformational changes. However, the mutations disrupted interatomic interactions in the catalytic site. Therefore, depending on the severity of disruption occurring at the catalytic site, the mutation may affect the efficiency of mechanism and functions of OTCase.
| Item Type: | Article |
|---|---|
| Keywords: | OTC Gene (Ornithine Transcarbamylase Gene), Missense Mutations, Genetic Disease Mechanisms |
| Taxonomy: | By Niche > Genome > Genomes |
| Local Content Hub: | Niche > Genome |
| Depositing User: | Hazrul Amir Tomyang (Puncak Alam) |
| Date Deposited: | 13 Nov 2024 09:20 |
| Last Modified: | 13 Nov 2024 09:20 |
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