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@ARTICLE{Kallscheuer:256374,
author = {Kallscheuer, Nicolai and Bott, Michael and van Ooyen, Jan
and Polen, Tino},
title = {{S}ingle-{D}omain {P}eptidyl-{P}rolyl cis / trans
{I}somerase {F}kp{A} from {C}orynebacterium glutamicum
{I}mproves the {B}iomass {Y}ield at {I}ncreased {G}rowth
{T}emperatures},
journal = {Applied and environmental microbiology},
volume = {81},
number = {22},
issn = {1098-5336},
address = {Washington, DC [u.a.]},
publisher = {Soc.},
reportid = {FZJ-2015-06331},
pages = {7839 - 7850},
year = {2015},
note = {Biotechnologie 1},
abstract = {Peptidyl-prolyl cis/trans isomerases (PPIases) catalyze the
rate-limiting protein folding step at peptidyl bonds
preceding proline residues and were found to be involved in
several biological processes, including gene expression,
signal transduction, and protein secretion. Representative
enzymes were found in almost all sequenced genomes,
including Corynebacterium glutamicum, a facultative
anaerobic Gram-positive and industrial workhorse for the
production of amino acids. In C. glutamicum, a predicted
single-domain FK-506 (tacrolimus) binding protein
(FKBP)-type PPIase (FkpA) is encoded directly downstream of
gltA, which encodes citrate synthase (CS). This gene cluster
is also present in other Actinobacteria. Here we carried out
in vitro and in vivo experiments to study the function and
influence of predicted FkpA in C. glutamicum. In vitro, FkpA
indeed shows typical PPIase activity with artificial
substrates and is inhibited by FK-506. Furthermore, FkpA
delays the aggregation of CS, which is also inhibited by
FK-506. Surprisingly, FkpA has a positive effect on the
activity and temperature range of CS in vitro. Deletion of
fkpA causes a $50\%$ reduced biomass yield compared to that
of the wild type when grown at 37°C, whereas there is only
a $10\%$ reduced biomass yield at the optimal growth
temperature of 30°C accompanied by accumulation of 7 mM
l-glutamate and 22 mM 2-oxoglutarate. Thus, FkpA may be
exploited for improved product formation in biotechnical
processes. Comparative transcriptome analysis revealed 69
genes which exhibit ≥2-fold mRNA level changes in C.
glutamicum ΔfkpA, giving insight into the transcriptional
response upon mild heat stress when FkpA is absent.},
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},
UT = {WOS:000363463800017},
pubmed = {pmid:26341203},
doi = {10.1128/AEM.02113-15},
url = {https://juser.fz-juelich.de/record/256374},
}