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pmid: 17803944
Recent studies demonstrated the existence of gene loops that juxtapose the promoter and terminator regions of genes with exceptionally long ORFs in yeast. Here we report that looping is not idiosyncratic to long genes but occurs between the distal ends of genes with ORFs as short as 1 kb. Moreover, looping is dependent upon the general transcription factor TFIIB: the E62K (glutamic acid 62 --> lysine) form of TFIIB adversely affects looping at every gene tested, including BLM10, SAC3, GAL10, SEN1, and HEM3. TFIIB crosslinks to both the promoter and terminator regions of the PMA1 and BLM10 genes, and its association with the terminator, but not the promoter, is adversely affected by E62K and by depletion of the Ssu72 component of the CPF 3' end processing complex, and is independent of TBP. We propose a model suggesting that TFIIB binds RNAP II at the terminator, which in turn associates with the promoter scaffold.
Terminator Regions, Genetic, Chromatin Immunoprecipitation, Saccharomyces cerevisiae Proteins, Models, Genetic, Transcription, Genetic, Cell Biology, Open Reading Frames, Gene Expression Regulation, Fungal, Transcription Factor TFIIB, Nucleic Acid Conformation, RNA Polymerase II, Promoter Regions, Genetic, Molecular Biology
Terminator Regions, Genetic, Chromatin Immunoprecipitation, Saccharomyces cerevisiae Proteins, Models, Genetic, Transcription, Genetic, Cell Biology, Open Reading Frames, Gene Expression Regulation, Fungal, Transcription Factor TFIIB, Nucleic Acid Conformation, RNA Polymerase II, Promoter Regions, Genetic, Molecular Biology
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influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
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