High-resolution mapping of tlt, a mouse mutant lacking otoconia

High-resolution mapping of tlt, a mouse mutant lacking otoconia The ability to sense gravity is enhanced by an extracellular structure that overlies the macular sensory epithelium. This complex consists of high density particles, otoconia, embedded within a gelatinous membrane. The tilted mouse specifically lacks otoconia, yet has no other detectable anatomic lesions. Furthermore, the penetrance of the tilted phenotype is nearly 100%. This mouse provides a model to identify genes that are involved in the development and function of vestibular otoconia. Using SSLP markers, we have mapped the tilted (tlt) gene on mouse Chromosome (Chr) 5 between D5Mit421 and D5Mit353/D5Mit128/D5Mit266/D5Mit267 by analysis of the progeny of an intersubspecific F2 intercross. We also mapped the fibroblast growth factor receptor 3 (Fgfr3) gene, a potential candidate for tlt, and the Huntington's disease homolog (Hdh) gene to D5Mit268, approximately 4.3 centiMorgans (cM) from the tilted locus. This study excludes both Fgfr3 and Hdh as candidate genes for tlt and identifies closely linked microsatellite markers that will be useful for the positional cloning of tlt. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

High-resolution mapping of tlt, a mouse mutant lacking otoconia

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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/s003359901041
Publisher site
See Article on Publisher Site

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