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PMID: 9042910 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

The mutational spectrum in Treacher Collins syndrome reveals a predominance of mutations that create a premature-termination codon.

American journal of human genetics ·Vol. 60 ·No. 3 ·1997-03-00 ·Pages 515-24

Edwards SJ, Gladwin AJ, Dixon MJ

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.

MeSH Terms
Chromosomes, Human, Pair 5 Codon, Terminator/genetics Female Humans Male Mandibulofacial Dysostosis/genetics Mutation Nuclear Proteins/genetics Pedigree Phosphoproteins/genetics Polymorphism, Single-Stranded Conformational RNA Splicing
Chemicals
Codon, Terminator Nuclear Proteins Phosphoproteins TCOF1 protein, human
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Edwards S J
School of Biological Sciences and Department of Dental Medicine, University of Manchester, United Kingdom.
Gladwin A J
Dixon M J
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Article Info
Journal
American journal of human genetics
Abbr.
Am J Hum Genet
ISSN
0002-9297
Published
1997-03-00
Pages
515-24
Language
English
Region
United States
NLM ID
0370475
PMCID
PMC1712503
Subset
IM
Grants
Wellcome Trust · United Kingdom
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