Title |
Congenital disorder of glycosylation (CDG) type Ie. A new patient
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Published in |
Journal of Inherited Metabolic Disease, September 2004
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DOI | 10.1023/b:boli.0000042984.42433.d8 |
Pubmed ID | |
Authors |
M. T. García‐Silva, G. Matthijs, E. Schollen, J. C. Cabrera, J. Sanchez del Pozo, M. Martí Herreros, R. Simón, M. Maties, E. Martín Hernández, T. Hennet, P. Briones |
Abstract |
CDG Ie is caused by a deficiency of dolichol-phosphate-mannose synthase 1 (DPM1), an enzyme involved in N-glycan assembly in the endoplasmic reticulum. Three proteins are known to be part of the synthase complex: DPM 1, DPM2 and DPM3. Only mutations in DPM1, the catalytic subunit, have been described in three families. One was homozygous for the c274C>G (R92G) mutation in DPM1 and two others were compound heterozygous for R92G and a c628delC deletion or a c331-343del13, respectively. Clinical features were a severe infantile encephalopathy, early intractable seizures, acquired microcephaly, and some dysmorphic features. We report a patient with milder symptoms: microcephaly, dysmorphic features, developmental delay, optic atrophy, and cerebellar dysfunction without cerebellar atrophy. The patient is homozygous for a new mutation in exon 9 of the DPM1 gene (c742T>C (S248P)). Our findings extend the spectrum of CDG Ie. |
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