Substitution of arginine for glycine at position 847 in the triple-helical domain of the alpha 1 (I) chain of type I collagen produces lethal osteogenesis imperfecta. Molecules that contain one or two abnormal chains differ in stability and secretion.
A child with a moderately severe form of osteogenesis imperfecta was heterozygous for a G to T transition that resulted in a substitution of cysteine for glycine at position 259 in the COL1A2 gene.
Substitution of cysteine for glycine at residue 415 of one allele of the alpha 1(I) chain of type I procollagen in type III/IV osteogenesis imperfecta.
Thermal stability of type I collagen molecules containing the substitution was decreased, but to a lesser extent than for a nonlethal cysteine for glycine substitution at residue 259 of alpha 2(I), indicating that this measure of molecular stability may be of limited use in explaining the pathogenesis of osteogenesis imperfecta.
Mild dominant osteogenesis imperfecta with intrafamilial variability: the cause is a serine for glycine alpha 1(I) 901 substitution in a type-I collagen gene.
Three unrelated individuals with perinatally lethal osteogenesis imperfecta resulting from identical Gly502Ser substitutions in the alpha 2-chain of type I collagen.
We report two sibs with severe, progressively deforming osteogenesis imperfecta (OI) and homozygosity by descent for a glycine 751 to serine substitution in the alpha2(I) collagen chain due to a G to A transition in the COL1A2 gene.
Haplotype analysis of the COL1A2 gene revealed that four probands from five independent OI probands with c.982G>A (p.Gly328Ser) had a common haplotype.