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@ARTICLE{Kever:897245,
author = {Kever, Larissa and Hünnefeld, Max and Brehm, Jannis and
Heermann, Ralf and Frunzke, Julia},
title = {{I}dentification of {G}ip as a novel phage‐encoded gyrase
inhibitor protein of {C}orynebacterium glutamicum},
journal = {Molecular microbiology},
volume = {116},
number = {5},
issn = {1365-2958},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2021-03707},
pages = {1268 - 1280},
year = {2021},
note = {Biotechnologie 1},
abstract = {By targeting key regulatory hubs of their host,
bacteriophages represent a powerful source for the
identification of novel antimicrobial proteins. Here, a
screening of small cytoplasmic proteins encoded by the CGP3
prophage of Corynebacterium glutamicum resulted in the
identification of the gyrase-inhibiting protein Cg1978,
termed Gip. Pull-down assays and surface plasmon resonance
revealed a direct interaction of Gip with the gyrase subunit
A (GyrA). The inhibitory activity of Gip was shown to be
specific to the DNA gyrase of its bacterial host C.
glutamicum. Overproduction of Gip in C. glutamicum resulted
in a severe growth defect as well as an induction of the SOS
response. Furthermore, reporter assays revealed an
RecA-independent induction of the cryptic CGP3 prophage,
most likely caused by topological alterations.
Overexpression of gip was counteracted by an increased
expression of gyrAB and a reduction of topA expression at
the same time, reflecting the homeostatic control of DNA
topology. We postulate that the prophage-encoded Gip protein
plays a role in modulating gyrase activity to enable
efficient phage DNA replication. A detailed elucidation of
the mechanism of action will provide novel directions for
the design of drugs targeting DNA gyrase.},
cin = {IBG-1},
ddc = {570},
cid = {I:(DE-Juel1)IBG-1-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34536319},
UT = {WOS:000701241500001},
doi = {10.1111/mmi.14813},
url = {https://juser.fz-juelich.de/record/897245},
}