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- W2023256217 abstract "The assembly and maturation of box C/D snoRNPs, factors essential for ribosome biogenesis, occur in the nucleoplasm. To investigate this process, we have analyzed non-snoRNP factors associated with the nucleoplasmic human U3 snoRNA. We show that both the precursor and mature length nucleoplasmic U3 snoRNAs are present in larger multiprotein complexes that contain the core box C/D proteins as well as many non-snoRNP factors linked to snoRNP assembly (TIP48, TIP49, Nopp140), RNA processing (TGS1, La, LSm4, hRrp46), and subcellular localization (CRM1, PHAX). Using RNAi, we show that most of these factors are essential for box C/D snoRNA accumulation. Furthermore, we demonstrate that the core proteins undergo a restructuring event that stabilizes their binding to the snoRNA. Importantly, restructuring, which may be mediated by the putative remodeling factor TIP49, appears to be linked to nucleolar localization. We believe that the assembly complex coordinates snoRNA processing, snoRNP assembly, restructuring, and localization." @default.
- W2023256217 created "2016-06-24" @default.
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- W2023256217 date "2004-12-01" @default.
- W2023256217 modified "2023-10-16" @default.
- W2023256217 title "Assembly and Maturation of the U3 snoRNP in the Nucleoplasm in a Large Dynamic Multiprotein Complex" @default.
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- W2023256217 doi "https://doi.org/10.1016/j.molcel.2004.11.012" @default.
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