Completion of the mouse aggrecan gene structure and identification of the defect in the cmd-Bc mouse as a near complete deletion of the murine aggrecan gene

Completion of the mouse aggrecan gene structure and identification of the defect in the cmd-Bc... Mouse cartilage matrix deficiency (cmd), an autosomal recessive phenotype caused by absence of aggrecan, maps to Chromosome (Chr) 7 and is caused by a 7-bp deletion in exon 5 generating a premature stop codon (Watanabe et al. 1994). Another spontaneous mutation with the same locus and phenotype, cmd-Bc, has now been defined as the complete loss of exons 2 to 18, resulting in a significantly shortened mRNA (1.2 kb). The upstream breakpoint is in intron 1, 18.8 kb 3′ of exon 1; the downstream breakpoint lies 10.5 kb past the final aggrecan exon 18. The deletion is flanked by sequences homologous to topoisomerase I and II cleavage sites and a 7-bp direct repeat, suggesting the defect resulted from a nonhomologous recombination event. Additionally, the size of the first intron and the intron-exon structure between exons 12 and 14 were determined, establishing the length of the murine aggrecan gene as 68.6 kb. This report completes the structural analysis of the murine aggrecan gene, defines a second null mutation, and reinforces the importance of aggrecan in development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Completion of the mouse aggrecan gene structure and identification of the defect in the cmd-Bc mouse as a near complete deletion of the murine aggrecan gene

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Publisher
Springer-Verlag
Copyright
Copyright © 1999 by Springer-Verlag New York Inc.
Subject
Life Sciences; Cell Biology; Anatomy; Zoology
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s003359901176
Publisher site
See Article on Publisher Site

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