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• W2103250022 endingPage "432" @default.
• W2103250022 startingPage "417" @default.
• W2103250022 abstract "This study illuminates the intra-nuclear fate of COL1A1 RNA in osteogenesis imperfecta (OI) Type I. Patient fibroblasts were shown to carry a heterozygous defect in splicing of intron 26, blocking mRNA export. Both the normal and mutant allele associated with a nuclear RNA track, a localized accumulation of posttranscriptional RNA emanating to one side of the gene. Both tracks had slightly elongated or globular morphology, but mutant tracks were cytologically distinct in that they lacked the normal polar distribution of intron 26. Normal COL1A1 RNA tracks distribute throughout an SC-35 domain, from the gene at the periphery. Normally, almost all 50 COL1A1 introns are spliced at or adjacent to the gene, before mRNA transits thru the domain. Normal COL1A1 transcripts may undergo maturation needed for export within the domain such as removal of a slow-splicing intron (shown for intron 24), after which they may disperse. Splice-defective transcripts still distribute thru the SC-35 domain, moving approximately 1-3 micrometer from the gene. However, microfluorimetric analyses demonstrate mutant transcripts accumulate to abnormal levels within the track and domain. Hence, mutant transcripts initiate transport from the gene, but are impeded in exit from the SC-35 domain. This identifies a previously undefined step in mRNA export, involving movement through an SC-35 domain. A model is presented in which maturation and release for export of COL1A1 mRNA is linked to rapid cycling of metabolic complexes within the splicing factor domain, adjacent to the gene. This paradigm may apply to SC-35 domains more generally, which we suggest may be nucleated at sites of high demand and comprise factors being actively used to facilitate expression of associated loci." @default.
• W2103250022 created "2016-06-24" @default.
• W2103250022 creator A5017159217 @default.
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• W2103250022 creator A5067453135 @default.
• W2103250022 creator A5068396581 @default.
• W2103250022 creator A5080170366 @default.
• W2103250022 date "2000-08-07" @default.
• W2103250022 modified "2023-10-12" @default.
• W2103250022 title "Tracking Col1a1 RNA in Osteogenesis Imperfecta" @default.
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• W2103250022 doi "https://doi.org/10.1083/jcb.150.3.417" @default.
• W2103250022 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2175183" @default.
• W2103250022 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10931857" @default.
• W2103250022 hasPublicationYear "2000" @default.
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