Abstract:
:Treacher Collins syndrome (TCS) is an autosomal dominant disorder of craniofacial development, the features of which include conductive hearing loss and cleft palate. The TCS locus has been mapped to human chromosome 5q31.3-32 and the mutated gene identified. In the current investigation, 25 previously undescribed mutations, which are spread throughout the gene, are presented. This brings the total reported to date to 35, which represents a detection rate of 60%. Of the mutations that have been reported to date, all but one result in the introduction of a premature-termination codon into the predicted protein, treacle. Moreover, the mutations are largely family specific, although a common 5 bp deletion in exon 24 (seven different families) and a recurrent splicing mutation in intron 3 (two different families) have been identified. This mutational spectrum supports the hypothesis that TCS results from haploinsufficiency.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Edwards SJ,Gladwin AJ,Dixon MJsubject
Has Abstractpub_date
1997-03-01 00:00:00pages
515-24issue
3eissn
0002-9297issn
1537-6605journal_volume
60pub_type
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