A Defect in Dolichol Phosphate Biosynthesis Causes a New Inherited Disorder with Death in Early Infancy
| Autor: | Gerhard Hammersen, V. Debus, Jonas Denecke, Christian Kranz, Erik Harms, Christoph Jungeblut, Anna Reith, Ulrich Schwarzer, Thorsten Marquardt, Christina Sohlbach, Hans Gerd Kehl, Helfried Gröbe, Anne Erlekotte, Sonja Reichel |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Cardiomyopathy
Dilated Male medicine.medical_specialty Glycosylation Mutant DNA Mutational Analysis Saccharomyces cerevisiae Biology Article chemistry.chemical_compound Dolichol Internal medicine Genetics medicine Humans Genetics(clinical) Allele Gene Genetics (clinical) Dolichol kinase Cells Cultured Skin Dolichol Phosphates Metabolic disorder Genetic Complementation Test Genetic Diseases Inborn Infant Fibroblasts medicine.disease Phenotype Pedigree carbohydrates (lipids) Phosphotransferases (Alcohol Group Acceptor) Endocrinology chemistry Mutation lipids (amino acids peptides and proteins) Female |
| Zdroj: | ResearcherID |
| Popis: | The following study describes the discovery of a new inherited metabolic disorder, dolichol kinase (DK1) deficiency. DK1 is responsible for the final step of the de novo biosynthesis of dolichol phosphate. Dolichol phosphate is involved in several glycosylation reactions, such as N-glycosylation, glycosylphosphatidylinositol (GPI)-anchor biosynthesis, and C- and O-mannosylation. We identified four patients who were homozygous for one of two mutations (c.295T--A [99Cys--Ser] or c.1322A--C [441Tyr--Ser]) in the corresponding hDK1 gene. The residual activity of mutant DK1 was 2%-4% when compared with control cells. The mutated alleles failed to complement the temperature-sensitive phenotype of DK1-deficient yeast cells, whereas the wild-type allele restored the normal growth phenotype. Affected patients present with a very severe clinical phenotype, with death in early infancy. Two of the patients died from dilative cardiomyopathy. |
| Databáze: | OpenAIRE |
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