PSACH results from mutations in the cartilage oligomeric matrix protein (COMP) gene, while SEDC is caused by mutations in the gene for type II procollagen (COL2A1).
Boy with syndactylies, macrocephaly, and severe skeletal dysplasia: not a new syndrome, but two dominant mutations (GLI3 E543X and COL2A1 G973R) in the same individual.
Three new point mutations in type II procollagen (COL2A1) and identification of a fourth family with the COL2A1 Arg519-->Cys base substitution using conformation sensitive gel electrophoresis.
A single base mutation in the type II procollagen gene (COL2A1) that converts glycine alpha 1-247 to serine in a family with late-onset spondyloepiphyseal dysplasia.
This study confirmed the importance of dominant negative mutations of the COL2A1 gene in producing the spondyloepiphyseal dysplasia congenita phenotype.
The findings in this study confirm that mutations of exon 48 of the COL2A1 gene, that alter the normal Gly-X-Y triplet structure of the corresponding region of alpha 1(II) chains of type II collagen, produce the spondyloepiphyseal dysplasia congenita phenotype.