Scientific article
OA Policy
English

Nup-PI: the nucleopore-promoter interaction of genes in yeast

Published inMolecular cell, vol. 21, no. 3, p. 379-391
Publication date2006-02-03
Abstract

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.

Keywords
  • Chromatin / metabolism
  • Chromosomes, Fungal
  • Gene Expression Regulation, Fungal
  • Nuclear Pore / metabolism
  • Nuclear Pore Complex Proteins / genetics
  • Nuclear Pore Complex Proteins / metabolism
  • Oligonucleotide Array Sequence Analysis
  • Promoter Regions, Genetic
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae Proteins / genetics
  • Saccharomyces cerevisiae Proteins / metabolism
  • Transcription, Genetic
  • Transcriptional Activation
Citation (ISO format)
SCHMID, Manfred et al. Nup-PI: the nucleopore-promoter interaction of genes in yeast. In: Molecular cell, 2006, vol. 21, n° 3, p. 379–391. doi: 10.1016/j.molcel.2005.12.012
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Journal ISSN1097-2765
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247downloads

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