The yeast Paf1 complex, minimally composed of Paf1, Ctr9, Cdc73, Rtf1, and Leo1, was originally isolated in association with RNA polymerase II (Pol II). Paf1 complex components are abundant and colocalize with Pol II on chromatin at promoters and in the coding regions of actively transcribed genes. Loss of Paf1 results in severe phenotypes and reduced amounts of other Paf1 factors, with little effect on abundance or chromatin distribution of Pol II, proteins important for transcriptional elongation (Spt5, Spt16), or RNA processing (Sub2). Loss of Paf1 factors causes a reduction of Pol II Ser2 phosphorylation and shortened poly(A) tails, suggesting that the complex facilitates linkage of transcriptional and posttranscriptional events. Surprisingly, loss of Rtf1 or Cdc73, with little phenotypic consequence, results in loss of Paf1 factors from chromatin and a significant reduction in Paf1/Pol II association. Therefore, the major functions of Paf1 can be independent of actively transcribing Pol II.
|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||Annotation Extension||Reference|
|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||Assay||Construct||Conditions||Strain Background||Reference|