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@PHDTHESIS{Sundermeyer:1018222,
author = {Sundermeyer, Lea},
title = {{A}nalysis of the signal transduction cascade tuning the
2-oxoglutarate dehydrogenase activity in {C}orynebacterium
glutamicum},
volume = {273},
school = {Univ. Düsseldorf},
type = {Dissertation},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2023-04618},
isbn = {978-3-95806-722-6},
series = {Schriften des Forschungszentrums Jülich Reihe
Schlüsseltechnologien / Key Technologies},
pages = {VI, 119},
year = {2023},
note = {Dissertation, Univ. Düsseldorf, 2022},
abstract = {In Corynebacterium glutamicum and many other
actinobacteria, the 2-oxoglutarate dehydrogenase complex
(ODH), a key enzyme of the tricarboxylic acid cycle, differs
from wellknown representatives by an unusual E1 subunit
(OdhA), which is fused with the succinyltransferase domain
usually present in a separate E2o subunit. Therefore, OdhA
requires the lipoyl groups of the E2p protein (AceF) of the
pyruvate dehydrogenase complex (PDH) for transferring the
succinyl group to coenzyme A. As a consequence, ODH forms a
hybrid complex with PDH, composed of the four proteins OdhA,
AceE (E1p), AceF, and Lpd (E3). Another unusual feature of
ODH in C. glutamicum and other actinobacteria is its
regulation by the 15-kDa protein OdhI, which contains a
forkhead-associated (FHA) domain known to bind
phospho-threonine epitopes. In its unphosphorylated state,
OdhI binds to OdhA with nM affinity and inhibits ODH
activity. Phosphorylation of OdhI by the soluble
serine/threonine protein kinase PknG triggers a
conformational change of OdhI that prevents its interaction
with OdhA and thereby abolishes the inhibition of ODH
activity. Dephosphorylation of phosphorylated OdhI is
catalyzed by the phospho-serine/threonine protein
phosphatase Ppp. Previous studies suggested that PknG
activity is controlled by the periplasmic binding protein
GlnH and the transmembrane protein GlnX, whose genes form an
operon with pknG....},
cin = {IBG-1},
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)3 / PUB:(DE-HGF)11},
urn = {urn:nbn:de:0001-20240124090434709-4196616-1},
doi = {10.34734/FZJ-2023-04618},
url = {https://juser.fz-juelich.de/record/1018222},
}