© 1993 Oxford University Press
RESEARCH-ARTICLE |
Structure and genomic sequence of the myotonic dystrophy (DM kinase) gene
1Department of Microbiology and Immunology, University of Ottawa Ottawa, Canada 2Division of Genetics, Children's Hospital of Eastern Ontario Ottawa, Canada 3Department of Pediatrics, University of Ottawa Canada 4Human Genome Center, Biomedical Sciences Division, Lawrence Livermore National Laboratory Livermore, CA 94550, USA 5Department of Cell Biology and Histology, Faculty of Medical Sciences, University of Nijmegen PO Box 9101, 6500 HB, Nijmegen, The Netherlands
*To whom correspondence should be addressed at: Children's Hospital of Eastern Ontario, Molecular Genetics Laboratory, 401 Smyth Road, Ottawa, Ontario KIH 8L1, Canada
Received October 12, 1992; Revised January 15, 1993; Accepted January 15, 1993
The mutation causing myotonic dystrophy (DM) has recently been identified as an unstable CTG trinucleotide repeat located in the 3' untranslated region of a gene encoding for a protein with putative serine-threonine protein kinase activity. In this report we present the genomic sequences of the human and murine DM kinase gene. A comparison of these sequences with each other and with known cDNA sequences from both species, led us to predict a translation initiation codon, as well as determine the organization of the DM kinase gene. Several polymorphisms within the human DM kinase gene have been identified, and PCR assays to detect two of these are described. The complete sequence and characterization of the structure of the DM kinase gene, as well as the identification of novel polymorphisms within the gene, represent an important step in a further understanding of the genetics of myotonic dystrophy and the molecular biology of the gene.
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