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@ARTICLE{Iacovella:141301,
author = {Iacovella, Maria G and Golfieri, Cristina and Massari,
Lucia F and Busnelli, Sara and Pagliuca, Cinzia and Dal
Maschio, Marianna and Infantino, Valentina and Visintin,
Rosella and Mechtler, Karl and Ferreira-Cerca, Sébastien
and De Wulf, Peter},
title = {{R}io1 promotes r{DNA} stability and downregulates {RNA}
polymerase {I} to ensure r{DNA} segregation.},
journal = {Nature Communications},
volume = {6},
number = {1},
issn = {2041-1723},
address = {[London]},
publisher = {Nature Publishing Group UK},
reportid = {DZNE-2020-07623},
pages = {6643},
year = {2015},
abstract = {The conserved protein kinase Rio1 localizes to the
cytoplasm and nucleus of eukaryotic cells. While the roles
of Rio1 in the cytoplasm are well characterized, its nuclear
function remains unknown. Here we show that nuclear Rio1
promotes rDNA array stability and segregation in
Saccharomyces cerevisiae. During rDNA replication in S
phase, Rio1 downregulates RNA polymerase I (PolI) and
recruits the histone deacetylase Sir2. Both interventions
ensure rDNA copy-number homeostasis and prevent the
formation of extrachromosomal rDNA circles, which are linked
to accelerated ageing in yeast. During anaphase, Rio1
downregulates PolI by targeting its subunit Rpa43, causing
PolI to dissociate from the rDNA. By stimulating the
processing of PolI-generated transcripts at the rDNA, Rio1
allows for rDNA condensation and segregation in late
anaphase. These events finalize the genome transmission
process. We identify Rio1 as an essential nucleolar
housekeeper that integrates rDNA replication and segregation
with ribosome biogenesis.},
keywords = {Anaphase: genetics / Chromosome Segregation: genetics / DNA
Replication: genetics / DNA, Ribosomal: metabolism /
DNA-Binding Proteins: genetics / Down-Regulation /
Protein-Serine-Threonine Kinases: genetics / RNA Polymerase
I: genetics / S Phase: genetics / Saccharomyces cerevisiae /
Saccharomyces cerevisiae Proteins: genetics / Silent
Information Regulator Proteins, Saccharomyces cerevisiae:
genetics / Sirtuin 2: genetics / DNA, Ribosomal (NLM
Chemicals) / DNA-Binding Proteins (NLM Chemicals) / Rpa43
protein, S cerevisiae (NLM Chemicals) / Saccharomyces
cerevisiae Proteins (NLM Chemicals) / Silent Information
Regulator Proteins, Saccharomyces cerevisiae (NLM Chemicals)
/ Protein-Serine-Threonine Kinases (NLM Chemicals) / Rio1
protein, S cerevisiae (NLM Chemicals) / RNA Polymerase I
(NLM Chemicals) / SIR2 protein, S cerevisiae (NLM Chemicals)
/ Sirtuin 2 (NLM Chemicals)},
cin = {Dresden common},
ddc = {500},
cid = {I:(DE-2719)6000013},
pnm = {341 - Molecular Signaling (POF3-341)},
pid = {G:(DE-HGF)POF3-341},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:25851096},
doi = {10.1038/ncomms7643},
url = {https://pub.dzne.de/record/141301},
}