Human Molecular Genetics, Vol 5, 1391-1396, Copyright © 1996 by Oxford University Press
MJ Dixon
Treacher Collins syndrome is an autosomal dominant disorder of craniofacial
development, the features of which include conductive hearing loss and
cleft palate. In the absence of a candidate gene, a positional cloning
approach has been used to isolate the mutated gene which maps to chromosome
5q31.3-32. Flanking markers were identified and a yeast artificial
chromosome and cosmid contig of the region defined by these markers was
created as a prelude to the creation of a transcript map of the region.
Analysis of genes isolated using this approach resulted in the
identification of the mutated gene. While the function of the gene remains
unknown, the identification of 20 mutations spread throughout the gene, all
of which would result in the insertion of a premature termination codon
into the reading frame, suggests that the mechanism underlying the disease
is haploinsufficiency.
REVIEWS
Treacher Collins syndrome
School of Biological Sciences, University of Manchester, UK.
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