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Glycogenin-1 deficiency and inactivated priming of glycogen synthesis
Department of Pathology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden.
Department of Neurology, Institute of Physiology and Neurological Sciences, University of Gothenburg, Gothenburg, Sweden.
Department of Pathology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden.
Department of Pathology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden.ORCID iD: 0000-0001-8854-5213
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2010 (English)In: New England Journal of Medicine, ISSN 0028-4793, E-ISSN 1533-4406, Vol. 362, no 13, 1203-1210 p.Article in journal (Refereed) Published
Abstract [en]

Glycogen, which serves as a major energy reserve in cells, is a large, branched polymer of glucose molecules. We describe a patient who had muscle weakness, associated with the depletion of glycogen in skeletal muscle, and cardiac arrhythmia, associated with the accumulation of abnormal storage material in the heart. The skeletal muscle showed a marked predominance of slow-twitch, oxidative muscle fibers and mitochondrial proliferation. Western blotting showed the presence of unglucosylated glycogenin-1 in the muscle and heart. Sequencing of the glycogenin-1 gene, GYG1, revealed a nonsense mutation in one allele and a missense mutation, Thr83Met, in the other. The missense mutation resulted in inactivation of the autoglucosylation of glycogenin-1 that is necessary for the priming of glycogen synthesis in muscle.

Place, publisher, year, edition, pages
Massachusetts Medical Society , 2010. Vol. 362, no 13, 1203-1210 p.
National Category
Neurology
Research subject
Medical sciences
Identifiers
URN: urn:nbn:se:his:diva-11959DOI: 10.1056/NEJMoa0900661ISI: 000276239500010PubMedID: 20357282Scopus ID: 2-s2.0-77950498558OAI: oai:DiVA.org:his-11959DiVA: diva2:906953
Available from: 2016-02-25 Created: 2016-02-25 Last updated: 2016-03-03Bibliographically approved

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CiteExportLink to record
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