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Cloning of the essential myotonic dystrophy region and mapping of the putative defect

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Abstract

MYOTONIC dystrophy is a common dominant disorder (global incidence of 1:8,000) with variable onset and a protean nature of symptoms mainly involving progressive muscle wasting, myotonia and cataracts1. To define the molecular defect, we have cloned the essential region of chromosome 19ql3.3, including proximal and distal markers2–7 in a 700–kilobase contig formed by overlapping cosmids and yeast artificial chromosomes (YACs). The central part of the contig bridges an area of about 350 kilobases between two new flanking crossover borders4–5. This segment has been extensively characterized through the isolation of five YAC clones and the subsequent subcloning in cosmids from which a detailed EcoRl, HindIII, Mlul and Notl restriction map has been derived. Two genomic probes and two homologous complementary DNA probes were isolated using the cosmids. These probes are all situated within ∼10 kilobases of genomic DNA and detect an unstable genomic segment in myotonic dystrophy patients. The length variation in this segment shows similarities to the instability seen at the fragile X locus8. The physical map location and the genetic characteristics of the length polymorphism is compatible with a direct role in the pathogenesis of myotonic dystrophy.

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Authors and Affiliations

  1. Human Genome Center, Biomedical Sciences Division, L-452, Lawrence Livermore National Laboratory, Livermore, California, 94550, USA

    Charalampos Aslanidis, Chris Amemiya, Chira Chen, Jennifer Alleman, Mark Vooijs, Gregory G. Lennon, Anthony V. Carrano & Pieter J. de Jong

  2. Department of Cell Biology and Histology and Department of Human Genetics, Faculty of Medical Sciences, University of Nijmegen, P0 Box 9101, 6500HB, Nijmegen, The Netherlands

    Gert Jansen, Nicole G. M. Wormskamp, Hubertus J. M. Smeets & Bé Wieringa

  3. Division of Genetics, Childrens Hospital of Eastern Ontario, and Department of Microbiology and Immunology, University of Ottawa, Ottawa, Canada

    Gary Shutler, Mani Mahadevan, Catherine Tsilfidis & Robert G. Korneluk

  4. Department of Anatomy, Charing Cross and Westminster Medical School, Fulham Palace Road, London, W6 8RF, UK

    Jessica Buxton & Keith Johnson

Authors
  1. Charalampos Aslanidis
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  2. Gert Jansen
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  3. Chris Amemiya
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  4. Gary Shutler
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  5. Mani Mahadevan
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  6. Catherine Tsilfidis
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  7. Chira Chen
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  8. Jennifer Alleman
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  9. Nicole G. M. Wormskamp
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  10. Mark Vooijs
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  11. Jessica Buxton
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  12. Keith Johnson
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  13. Hubertus J. M. Smeets
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  14. Gregory G. Lennon
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  15. Anthony V. Carrano
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  16. Robert G. Korneluk
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  17. Bé Wieringa
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  18. Pieter J. de Jong
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Aslanidis, C., Jansen, G., Amemiya, C. et al. Cloning of the essential myotonic dystrophy region and mapping of the putative defect. Nature 355, 548–551 (1992). https://doi.org/10.1038/355548a0

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  • DOI: https://doi.org/10.1038/355548a0

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