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@ARTICLE{Keppel:877824,
author = {Keppel, Marc and Hünnefeld, Max and Filipchyk, Andrei and
Viets, Ulrike and Davoudi, Cedric-Farhad and Krüger, Aileen
and Mack, Christina and Pfeifer, Eugen and Polen, Tino and
Baumgart, Meike and Bott, Michael and Frunzke, Julia},
title = {{H}rr{SA} orchestrates a systemic response to heme and
determines prioritization of terminal cytochrome oxidase
expression},
journal = {Nucleic acids research},
volume = {48},
number = {12},
issn = {0305-1048},
address = {London},
publisher = {Information Retrieval Ltd.86606},
reportid = {FZJ-2020-02463},
pages = {6547-6562},
year = {2020},
note = {Biotechnologie 1},
abstract = {Heme is a multifaceted molecule. While serving as a
prosthetic group for many important proteins, elevated
levels are toxic to cells. The complexity of this stimulus
has shaped bacterial network evolution. However, only a
small number of targets controlled by heme-responsive
regulators have been described to date. Here, we performed
chromatin affinity purification and sequencing to provide
genome-wide insights into in vivo promoter occupancy of
HrrA, the response regulator of the heme-regulated
two-component system HrrSA of Corynebacterium glutamicum.
Time-resolved profiling revealed dynamic binding of HrrA to
more than 200 different genomic targets encoding proteins
associated with heme biosynthesis, the respiratory chain,
oxidative stress response and cell envelope remodeling. By
repression of the extracytoplasmic function sigma factor
sigC, which activates the cydABCD operon, HrrA prioritizes
the expression of genes encoding the cytochrome bc1-aa3
supercomplex. This is also reflected by a significantly
decreased activity of the cytochrome aa3 oxidase in the
ΔhrrA mutant. Furthermore, our data reveal that HrrA also
integrates the response to heme-induced oxidative stress by
activating katA encoding the catalase. These data provide
detailed insights in the systemic strategy that bacteria
have evolved to respond to the versatile signaling molecule
heme.},
cin = {IBG-1},
ddc = {540},
cid = {I:(DE-Juel1)IBG-1-20101118},
pnm = {581 - Biotechnology (POF3-581) / DFG project 284242796 -
Spezifität der Phosphatase-Aktivität und Interaktion
Häm-abhängiger Zweikomponentensysteme in Corynebacterium
glutamicum},
pid = {G:(DE-HGF)POF3-581 / G:(GEPRIS)284242796},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32453397},
UT = {WOS:000574288800018},
doi = {10.1093/nar/gkaa415},
url = {https://juser.fz-juelich.de/record/877824},
}