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@ARTICLE{Wennerhold:50945,
author = {Wennerhold, J. and Bott, M.},
title = {{T}he {D}tx{R} {R}egulon of {C}orynebacterium glutamicum},
journal = {Journal of bacteriology},
volume = {188},
issn = {0021-9193},
address = {Washington, DC},
publisher = {Soc.},
reportid = {PreJuSER-50945},
pages = {2907 - 2918},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Previous studies with Corynebacterium diphtheriae and
Mycobacterium species revealed that the transcriptional
regulator DtxR and its ortholog IdeR play a central role in
the control of iron metabolism. In the present work, we used
genome-based approaches to determine the DtxR regulon of
Corynebacterium glutamicum, a nonpathogenic relative of C.
diphtheriae. First, global gene expression of a dtxR
deletion mutant was compared with that of the wild type
using DNA microarrays. Second, we used a computer-based
approach to identify 117 putative DtxR binding sites in the
C. glutamicum genome. In the third step, 74 of the
corresponding genome regions were amplified by PCR, 51 of
which were shifted by the DtxR protein. Finally, we analyzed
which of the genes preceded by a functional DtxR binding
site showed altered mRNA levels in the transcriptome
comparison. Fifty-one genes organized in 27 putative operons
displayed an increased mRNA level in the DeltadtxR mutant
and thus are presumably repressed by DtxR. The majority of
these genes are obviously involved in iron acquisition,
three encode transcriptional regulators, e.g., the recently
identified repressor of iron proteins RipA, and the others
encode proteins of diverse or unknown functions. Thirteen
genes showed a decreased mRNA level in the DeltadtxR mutant
and thus might be activated by DtxR. This group included the
suf operon, whose products are involved in the formation and
repair of iron-sulfur clusters, and several genes for
transcriptional regulators. Our results clearly establish
DtxR as the master regulator of iron-dependent gene
expression in C. glutamicum.},
keywords = {Bacterial Proteins: genetics / Bacterial Proteins:
physiology / Binding Sites / Computational Biology /
Corynebacterium glutamicum: genetics / Corynebacterium
glutamicum: physiology / DNA, Bacterial: metabolism /
DNA-Binding Proteins: genetics / DNA-Binding Proteins:
physiology / Electrophoretic Mobility Shift Assay / Gene
Deletion / Gene Expression Regulation, Bacterial / Iron:
metabolism / Oligonucleotide Array Sequence Analysis /
Operon / Protein Binding / RNA, Bacterial: analysis / RNA,
Messenger: analysis / Regulon / Bacterial Proteins (NLM
Chemicals) / DNA, Bacterial (NLM Chemicals) / DNA-Binding
Proteins (NLM Chemicals) / RNA, Bacterial (NLM Chemicals) /
RNA, Messenger (NLM Chemicals) / Iron (NLM Chemicals) / J
(WoSType)},
cin = {IBT-1},
ddc = {570},
cid = {I:(DE-Juel1)VDB55},
pnm = {Biotechnologie},
pid = {G:(DE-Juel1)FUEK410},
shelfmark = {Microbiology},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16585752},
pmc = {pmc:PMC1446976},
UT = {WOS:000236746200018},
doi = {10.1128/JB.188.8.2907-2918.2006},
url = {https://juser.fz-juelich.de/record/50945},
}