Pancevac C, et al. (2010) Structure of the Rna15 RRM-RNA complex reveals the molecular basis of GU specificity in transcriptional 3'-end processing factors. Nucleic Acids Res 38(9):3119-32
Abstract: Rna15 is a core subunit of cleavage factor IA (CFIA), an essential transcriptional 3'-end processing factor from Saccharomyces cerevisiae. CFIA is required for polyA site selection/cleavage targeting RNA sequences that surround polyadenylation sites in the 3'-UTR of RNA polymerase-II transcripts. RNA recognition by CFIA is mediated by an RNA recognition motif (RRM) contained in the Rna15 subunit of the complex. We show here that Rna15 has a strong and unexpected preference for GU containing RNAs and reveal the molecular basis for a base selectivity mechanism that accommodates G or U but discriminates against C and A bases. This mode of base selectivity is rather different to that observed in other RRM-RNA structures and is structurally conserved in CstF64, the mammalian counterpart of Rna15. Our observations provide evidence for a highly conserved mechanism of base recognition amongst the 3'-end processing complexes that interact with the U-rich or U/G-rich elements at 3'-end cleavage/polyadenylation sites.
| Status: Published | Type: Journal Article | PubMed ID: 20097654 |
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| Topics | Genes linked to topics |
|---|---|
| RNA15 | |
| Function/Process | |
| Mutants/Phenotypes | |
| Non-Fungal Related Genes/Proteins | |
| Primary Literature | |
| Protein Sequence Features | |
| Protein-Nucleic Acid Interactions | |
| Protein/Nucleic Acid Structure | |
| Strains/Constructs | |




