Reference: Noble CG, et al. (2004) Rna14-Rna15 assembly mediates the RNA-binding capability of Saccharomyces cerevisiae cleavage factor IA. Nucleic Acids Res 32(11):3364-75

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Abstract


The Rna14-Rna15 complex is a core component of the cleavage factor IA RNA-processing complex from Saccharomyces cerevisiae. To understand the assembly and RNA-binding properties, we have isolated and characterized the Rna14-Rna15 complex using a combination of biochemical and biophysical methods. Analysis of the purified complex, using transmission electron microscopy, reveals that the two proteins assemble into a kinked rod-shaped structure and that these rods are able to further self-associate. Analytical ultracentrifugation reveals that Rna14 mediates this association and facilitates assembly of an A2B2 tetramer (M(r) 230 000), where relatively compact Rna14-Rna15 heterodimers are in rapid equilibrium with tetramers that have a more extended shape. The Rna14-Rna15 complex, unlike the individual components, binds to an RNA oligonucleotide derived from the 3'-untranslated region of the S.cerevisiae GAL7 gene. Based on these structural and thermodynamic data, we propose that CFIA assembly regulates RNA-binding activity.

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Journal Article
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Noble CG, Walker PA, Calder LJ, Taylor IA
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