Abstract:
:Most individuals with osteogenesis imperfecta (OI) are heterozygous for dominant mutations in one of the genes that encode the chains of type I collagen. Each of the more than 30 mutations characterized to date has been unique to the affected member(s) of the family. We have determined that two individuals with a progressive deforming variety of OI, OI type III, have the same new dominant mutation [alpha 1(I)gly154 to arg] and that two unrelated infants with perinatal lethal OI, OI type II, share a second new dominant mutation [alpha 1(I)gly1003 to ser]. These mutations occurred at CpG dinucleotides, in a manner consistent with deamination of a methylated cytosine residue, and raise the possibility that CpG dinucleotides are common sites of recurrent mutations in collagen genes. Further, these findings confirm that the OI type-III phenotype, previously thought to be inherited in an autosomal recessive manner, can result from new dominant mutations in the COL1A1 gene of type-I collagen.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Pruchno CJ,Cohn DH,Wallis GA,Willing MC,Starman BJ,Zhang XM,Byers PHdoi
10.1007/BF01213088subject
Has Abstractpub_date
1991-05-01 00:00:00pages
33-40issue
1eissn
0340-6717issn
1432-1203journal_volume
87pub_type
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