dc.contributor.author | Constantinou-Deltas, Constantinos D. | en |
dc.contributor.author | Nielsen, K. B. | en |
dc.contributor.author | Prockop, D. J. | en |
dc.creator | Constantinou-Deltas, Constantinos D. | en |
dc.creator | Nielsen, K. B. | en |
dc.creator | Prockop, D. J. | en |
dc.date.accessioned | 2019-11-04T12:50:27Z | |
dc.date.available | 2019-11-04T12:50:27Z | |
dc.date.issued | 1989 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/53026 | |
dc.description.abstract | A fraction of the proα1(I) and proα2(I) chains in type I procollagen synthesized by the fibroblasts from a proband with a lethal variant of osteogenesis imperfecta were overmodified by posttranslational reactions. After digestion with pepsin, some of the α1(I) chains were recovered as disulfide-linked dimers. Mapping of cyanogen bromide peptides indicated that the disulfide link was contained in α1-CB6, the cyanogen bromide fragment containing amino acid residues 823-1014 of the α1(I) chain. Nucleotide sequencing of cDNA clones demonstrated a substitution of T for G that converted glycine 904 of the α1(I) chain to cysteine. A large fraction of the type I procollagen synthesized by the proband's fibroblasts, had a thermostability that was 3-4°C lower than the normal type I procollagen as assayed by brief proteinase digestion. In addition, the type I procollagen synthesized by the proband's fibroblasts was secreted with an abnormal kinetic pattern in that there was a lag period of about 30 min in pulse-chase experiments. The mutation of glycine to cysteine was not found in type I procollagen synthesized by fibroblasts from the proband's parents. Therefore, the mutation was a sporadic one. However, the mother's fibroblasts synthesized a type I procollagen in which part of the proα chains were overmodified and had a lower thermostability. Therefore, the proband may have inherited a mutated allele for type I procollagen from her mother that contributed to the lethal phenotype. The mother was assymptomatic. She was somewhat short and had slightly blue sclerae but no definitive signs of a connective tissue abnormality. The observations on the mother indicated, therefore, that a mutation that causes synthesis of a type I procollagen with a lowered thermal stability does not necessarily produce a heritable disorder of connective tissue. | en |
dc.source | Journal of Clinical Investigation | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0024512924&partnerID=40&md5=7dac941f309f82c56f5d4e536323d9b8 | |
dc.subject | human | en |
dc.subject | female | en |
dc.subject | priority journal | en |
dc.subject | Pregnancy | en |
dc.subject | case report | en |
dc.subject | Base Sequence | en |
dc.subject | Molecular Sequence Data | en |
dc.subject | mutation | en |
dc.subject | fatality | en |
dc.subject | nucleic acid base substitution | en |
dc.subject | Peptide Mapping | en |
dc.subject | Genes, Lethal | en |
dc.subject | Infant, Newborn | en |
dc.subject | osteogenesis imperfecta | en |
dc.subject | procollagen | en |
dc.subject | Support, U.S. Gov't, P.H.S. | en |
dc.subject | cysteine | en |
dc.subject | Fetal Death | en |
dc.subject | glycine | en |
dc.title | A lethal variant of osteogenesis imperfecta has a single base mutation that substitutes cysteine for glycine 904 of the α1(I) chain of type I procollagen. The asymptomatic mother has an unidentified mutation producing an overmodified and unstable type I procollagen | en |
dc.type | info:eu-repo/semantics/article | |
dc.description.volume | 83 | |
dc.description.startingpage | 574 | |
dc.description.endingpage | 584 | |
dc.author.faculty | Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Βιολογικών Επιστημών / Department of Biological Sciences | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :24</p> | en |
dc.source.abbreviation | J.Clin.Invest. | en |
dc.contributor.orcid | Constantinou-Deltas, Constantinos D. [0000-0001-5549-9169] | |
dc.gnosis.orcid | 0000-0001-5549-9169 | |