RNA polymerase I (Pol I) is the most specialized eukaryotic Pol. It is only responsible for the synthesis of pre-ribosomal RNA (rRNA), the precursor of 18S, 5.8S and 28S rRNA, the most abundant cellular RNA types. Aberrant Pol I transcription is observed in a wide variety of cancers and its down-regulation is associated with several genetic disorders. The regulation and mechanism of Pol I transcription is increasing in clarity given the numerous high-resolution Pol I structures that have helped bridge seminal genetic and biochemical findings in the field. Here, we review the multifunctional roles of an important TFIIF- and TFIIE-like subcomplex composed of the Pol I subunits A34.5 and A49 in yeast, and PAF49 and PAF53 in mammals. Recent analyses have revealed a dynamic interplay between this subcomplex at nearly every step of the Pol I transcription cycle in addition to new roles in chromatin traversal and the existence of a new helix-turn-helix (HTH) within the A49/PAF53 linker domain that expands its dynamic functions during the Pol I transcription process.
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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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