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• W2028484611 abstract "In higher eukaryotes, the 5' splice site (5'ss) is initially recognized through an RNA-RNA interaction by U1 small nuclear ribonucleoprotein (U1 snRNP). This event represents one of the key steps in initial spliceosomal assembly and many disease-associated mutations in humans often disrupt this process. Beside base pair complementarity, 5'ss recognition can also be modified by additional factors such as RNA secondary structures or the specific binding of other nuclear proteins. In this work, we have focused on investigating a few examples of changes detected within the 5'ss in patients, that would not be immediately considered disease causing mutations. We show that the splicing outcome of very similar mutations can be very different due to variations in trans-acting factor(s) interactions and specific context influences. Using several NF1 donor sites and SELEX approaches as experimental models, we have examined the binding properties of particular sequence motifs such as GGGU found in donor sites, and how the sequence context can change their interaction with hnRNPs such as H/F and A1/A2. Our results clearly show that even minor differences in local nucleotide context can differentially affect the binding ability of these factors to the GGGU core. Finally, using a previously identified mutation in KCNH2 that resulted in intron retention we show how very similar 5'ss mutations found in patients can have a very different splicing outcome due to the neighbouring sequence context, thus highlighting the general need to approach splicing problems with suitable experimental approaches." @default.
• W2028484611 created "2016-06-24" @default.
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• W2028484611 date "2012-06-01" @default.
• W2028484611 modified "2023-10-16" @default.
• W2028484611 title "Complexities of 5'splice site definition: Implications in clinical analyses" @default.
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• W2028484611 doi "https://doi.org/10.4161/rna.20386" @default.
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