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@ARTICLE{Kberl:875079,
author = {Küberl, Andreas and Mengus-Kaya, Aliye and Polen, Tino and
Bott, Michael},
title = {{T}he iron deficiency response of {C}orynebacterium
glutamicum and a link to thiamine biosynthesis},
journal = {Applied and environmental microbiology},
volume = {86},
issn = {1098-5336},
address = {Washington, DC [u.a.]},
publisher = {Soc.},
reportid = {FZJ-2020-01788},
pages = {e00065-20},
year = {2020},
note = {Biotechnologie 1},
abstract = {The response to iron limitation of the Gram-positive soil
bacterium Corynebacterium glutamicum was analyzed with
respect to secreted metabolites, the transcriptome, and the
proteome. During growth in glucose minimal medium, iron
limitation caused a shift from lactate to pyruvate as the
major secreted organic acid complemented by l-alanine and
2-oxoglutarate. Transcriptome and proteome analyses revealed
that a pronounced iron starvation response governed by the
transcriptional regulators DtxR and RipA was detectable in
the late, but not in the early, exponential-growth phase. A
link between iron starvation and thiamine pyrophosphate
(TPP) biosynthesis was uncovered by the strong upregulation
of thiC. As phosphomethylpyrimidine synthase (ThiC) contains
an iron-sulfur cluster, limiting activities of the
TPP-dependent pyruvate–2-oxoglutarate dehydrogenase
supercomplex probably cause the excretion of pyruvate and
2-oxoglutarate. In line with this explanation, thiamine
supplementation could strongly diminish the secretion of
these acids. The upregulation of thiC and other genes
involved in thiamine biosynthesis and transport is
presumably due to TPP riboswitches present at the 5′ end
of the corresponding operons. The results obtained in this
study provide new insights into iron homeostasis in C.
glutamicum and demonstrate that the metabolic consequences
of iron limitation can be due to the iron dependency of
coenzyme biosynthesis.},
cin = {IBG-1},
ddc = {570},
cid = {I:(DE-Juel1)IBG-1-20101118},
pnm = {581 - Biotechnology (POF3-581)},
pid = {G:(DE-HGF)POF3-581},
typ = {PUB:(DE-HGF)16},
pubmed = {32144105},
UT = {WOS:000534070600001},
doi = {10.1128/AEM.00065-20},
url = {https://juser.fz-juelich.de/record/875079},
}