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Dev Cell. 2019 Jun 17;49(6):936-947.e4. doi: 10.1016/j.devcel.2019.05.023.

The Role of Transcription Factors and Nuclear Pore Proteins in Controlling the Spatial Organization of the Yeast Genome.

Author information

1
Department of Molecular Biosciences, Northwestern University, Evanston, IL 60201, USA.
2
Department of Molecular Biosciences, Northwestern University, Evanston, IL 60201, USA. Electronic address: j-brickner@northwestern.edu.

Abstract

Loss of nuclear pore complex (NPC) proteins, transcription factors (TFs), histone modification enzymes, Mediator, and factors involved in mRNA export disrupts the physical interaction of chromosomal sites with NPCs. Conditional inactivation and ectopic tethering experiments support a direct role for the TFs Gcn4 and Nup2 in mediating interaction with the NPC but suggest an indirect role for factors involved in mRNA export or transcription. A conserved "positioning domain" within Gcn4 controls interaction with the NPC and inter-chromosomal clustering and promotes transcription of target genes. Such a function may be quite common; a comprehensive screen reveals that tethering of most yeast TFs is sufficient to promote targeting to the NPC. While some TFs require Nup100, others do not, suggesting two distinct targeting mechanisms. These results highlight an important and underappreciated function of TFs in controlling the spatial organization of the yeast genome through interaction with the NPC.

KEYWORDS:

chromatin; chromosome; inter-chromosomal clustering; nuclear architecture; nuclear pore complex; transcription

PMID:
31211995
PMCID:
PMC6613381
[Available on 2020-06-17]
DOI:
10.1016/j.devcel.2019.05.023

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