Nup-PI: The Nucleopore-Promoter Interaction of Genes in Yeast
pmid: 16455493
Nup-PI: The Nucleopore-Promoter Interaction of Genes in Yeast
Our previous work identified the inner basket of the NPC as a physical activation/protection station for force-tethered, epigenetically silenced genes. Here we show that a specific nucleopore-to-gene-promoter interaction (Nup-PI) is an early physiological event of gene activation. Nup-PI was discovered with chromatin endogenous cleavage (ChEC) experiments that mapped in vivo the genomic interaction sites of the nucleoporin Nup2p fused to microccocal nuclease (Nup2-MN). Strong Nup-PI, cleavage by Nup2-MN, is observed at the promoters of the GAL genes and at HXK1 upon activation of these genes with galactose. Nup-PI at the GAL locus requires Gal4p and the UASg and TATA box elements but not SAGA and active transcription. The physical, activation-dependent interaction of the GAL locus with the NPC basket was confirmed by imaging. Chromosome-wide ChEC studies indicated that Nup-PI occurs at numerous genes. The data identify the NPC basket as a new, integral participant in gene expression.
- University of Geneva Switzerland
Transcriptional Activation, 570, Saccharomyces cerevisiae Proteins, Transcription, Genetic, Nuclear Pore / metabolism, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins / genetics, Gene Expression Regulation, Fungal, Saccharomyces cerevisiae / metabolism, Promoter Regions, Genetic, Molecular Biology, Oligonucleotide Array Sequence Analysis, Saccharomyces cerevisiae Proteins / metabolism, Cell Biology, 540, Chromatin, Nuclear Pore Complex Proteins / metabolism, Nuclear Pore Complex Proteins, Chromatin / metabolism, Saccharomyces cerevisiae / genetics, Nuclear Pore Complex Proteins / genetics, Nuclear Pore, Chromosomes, Fungal
Transcriptional Activation, 570, Saccharomyces cerevisiae Proteins, Transcription, Genetic, Nuclear Pore / metabolism, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins / genetics, Gene Expression Regulation, Fungal, Saccharomyces cerevisiae / metabolism, Promoter Regions, Genetic, Molecular Biology, Oligonucleotide Array Sequence Analysis, Saccharomyces cerevisiae Proteins / metabolism, Cell Biology, 540, Chromatin, Nuclear Pore Complex Proteins / metabolism, Nuclear Pore Complex Proteins, Chromatin / metabolism, Saccharomyces cerevisiae / genetics, Nuclear Pore Complex Proteins / genetics, Nuclear Pore, Chromosomes, Fungal
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