Abstract:
BACKGROUND:Osteogenesis imperfecta (OI) comprises a clinically and genetically heterogeneous group of connective tissue disorders, characterized by low bone mass, increased bone fragility, and blue-gray eye sclera. OI often results from missense mutations in one of the conserved glycine residues present in the Gly-X-Y sequence repeats of the triple helical region of the collagen type I α chain, which is encoded by the COL1A1 gene. The aim of the present study is to describe the phenotype of OI II patient and a novel mutation, causing current phenotype. RESULTS:We report an undescribed de novo COL1A1 mutation in a patient affected by severe OI. After performing the whole-exome sequencing in a case parent-child trio, we identified a novel heterozygous c.2317G > T missense mutation in the COL1A1 gene, which leads to p.Gly773Cys transversion in the triple helical domain of the collagen type I α chain. The presence of the missense mutation was confirmed with the Sanger sequencing. CONCLUSIONS:Hereby, we report a novel mutation in the COL1A1 gene causing severe, life threatening OI and indicate the role of de novo mutation in the pathogenesis of rare familial diseases. Our study underlines the importance of exome sequencing in disease gene discovery for families where conventional genetic testing does not give conclusive evidence.
journal_name
Hum Genomicsjournal_title
Human genomicsauthors
Maasalu K,Nikopensius T,Kõks S,Nõukas M,Kals M,Prans E,Zhytnik L,Metspalu A,Märtson Adoi
10.1186/s40246-015-0028-0subject
Has Abstractpub_date
2015-05-10 00:00:00pages
6eissn
1473-9542issn
1479-7364pii
10.1186/s40246-015-0028-0journal_volume
9pub_type
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