Stickler-like syndrome due to a dominant negative mutation in the COL2A1 gene.

Abstract

The type II collagenopathies include a wide spectrum of phenotypes ranging from mild spondylo epiphyseal dysplasia (SED) to severe achondrogenesis/hypochondrogenesis. Several attempts have been made at providing phenotype-genotype correlations in this group of disorders. In this report we discuss a South African family in which four members have a phenotype resembling Stickler syndrome type 1. Ocular problems and conductive deafness predominate, while skeletal changes resemble those of a mild form of multiple epiphyseal dysplasia (MED). In distinction to the classical form of Stickler syndrome, the affected persons have stubby digits. DNA analysis of the exons of the COL2A1 gene documented a C-T transversion in exon 39, resulting in an Arg704Cys substitution in the triple helical domain of the type II collagen peptide; this nontermination mutation may be indicative of further heterogeneity in the Stickler group of disorders or of a new syndrome amongst the type II collagenopathies.

• Authors: R Ballo, P H Beighton, R S Ramesar
• Journal: American journal of medical genetics (Am J Med Genet) Vol. 80 Issue 1 Pg. 6-11 (Oct 30 1998) ISSN: 0148-7299 [Print] United States
• PMID: 9800905 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Collagen

Topics

• Abnormalities, Multiple (genetics)
• Amino Acid Sequence
• Base Sequence
• Collagen (genetics)
• Connective Tissue Diseases (genetics)
• Eye Diseases (genetics)
• Female
• Genes, Dominant
• Genetic Linkage
• Genotype
• Humans
• Male
• Pedigree
• Phenotype
• Point Mutation
• Syndrome