All yeast mitochondrial mRNAs terminate at their 3' ends with a conserved dodecamer sequence, a site for high-affinity binding by DBP (dodecamer binding protein). Using purified DBP, we show that binding requires an intact dodecamer site and is enhanced by the presence in an oligonucleotide of the immediate 4-5 upstream nucleotides. Binding affinity varied from 0.25 to 0.85 nM towards a set of RNA oligonucleotides containing messenger specific upstream sequences in addition to the dodecamer site. Furthermore, we show that phosphatase treatment of DBP abolishes its specific binding, indicating the involvement of reversible phosphorylation in the regulation of its binding activities. This finding will further our understanding of the mechanism of DBP in the regulation of RNA metabolism in yeast mitochondria.
|Evidence ID||Analyze ID||Interactor||Interactor Systematic Name||Interactor||Interactor Systematic Name||Type||Assay||Annotation||Action||Modification||Phenotype||Source||Reference||Note|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Gene Ontology Term||Gene Ontology Term ID||Qualifier||Aspect||Method||Evidence||Source||Assigned On||Reference||Annotation Extension|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Phenotype||Experiment Type||Experiment Type Category||Mutant Information||Strain Background||Chemical||Details||Reference|
|Evidence ID||Analyze ID||Regulator||Regulator Systematic Name||Target||Target Systematic Name||Experiment||Conditions||Strain||Source||Reference|