Meiotic gene expression in budding yeast is tightly controlled by RNA-binding proteins (RBPs), with the meiosis-specific RBP Rim4 playing a key role in sequestering mid-late meiotic transcripts to prevent premature translation. However, the mechanisms governing assembly and disassembly of the Rim4-mRNA complex, critical for Rim4's function and stability, remain poorly understood. In this study, we unveil regulation of the Rim4 ribonucleoprotein (RNP) complex by the yeast 14-3-3 proteins Bmh1 and Bmh2. These proteins form a Rim4-Bmh1-Bmh2 heterotrimeric complex that expels mRNAs from Rim4 binding. We identify four Bmh1/2 binding sites (BBSs) on Rim4, with two residing within the RNA recognition motifs (RRMs). Phosphorylation and dephosphorylation of serine/threonine (S/T) residues at these BBSs by PKA kinase and Cdc14 phosphatase activities primarily control formation of Rim4-Bmh1/2, regulating Rim4's subcellular distribution, function, and stability. These findings shed light on the intricate post-transcriptional regulatory mechanisms governing meiotic gene expression.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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