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@ARTICLE{Huber:863449,
author = {Huber, Catharina V and Jakobs, Barbara D and Mishra, Laxmi
S and Niedermaier, Stefan and Stift, Marc and Winter, Gudrun
and Adamska, Iwona and Funk, Christiane and Huesgen, Pitter
and Funck, Dietmar},
title = {{DEG}10 contributes to mitochondrial proteostasis, root
growth and seed yield in {A}rabidopsis},
journal = {The journal of experimental botany},
volume = {70},
number = {19},
issn = {1460-2431},
address = {Oxford},
publisher = {Oxford Univ. Press},
reportid = {FZJ-2019-03513},
pages = {5423–5436},
year = {2019},
abstract = {Maintaining mitochondrial proteome integrity is especially
important under stress conditions to ensure a continued ATP
supply for protection and adaptation responses in plants.
Deg/HtrA proteases are important factors in the cellular
protein quality control system, but little is known about
their function in mitochondria. Here we analyzed the
expression pattern and physiological function of Arabidopsis
thaliana DEG10, which has homologs in all photosynthetic
eukaryotes. Both expression of DEG10:GFP fusion proteins and
immunoblotting after cell fractionation showed an
unambiguous subcellular localization exclusively in
mitochondria. DEG10 promoter:GUS fusion constructs showed
that DEG10 is expressed in trichomes but also in the
vascular tissue of roots and aboveground organs. DEG10
loss-of-function mutants were impaired in root elongation,
especially at elevated temperature. Quantitative proteome
analysis revealed concomitant changes in the abundance of
mitochondrial respiratory chain components and assembly
factors, which partially appeared to depend on altered
mitochondrial retrograde signaling. Under field conditions,
lack of DEG10 caused a decrease in seed production. Taken
together, our findings demonstrate that DEG10 affects
mitochondrial proteostasis, is required for optimal root
development and seed set under challenging environmental
conditions, and thus contributes to stress tolerance of
plants.},
cin = {ZEA-3},
ddc = {580},
cid = {I:(DE-Juel1)ZEA-3-20090406},
pnm = {582 - Plant Science (POF3-582) / ProPlantStress -
Proteolytic processing in plant stress signal transduction
and responses to abiotic stress and pathogen attack
(639905)},
pid = {G:(DE-HGF)POF3-582 / G:(EU-Grant)639905},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31225599},
UT = {WOS:000491240900029},
doi = {10.1093/jxb/erz294},
url = {https://juser.fz-juelich.de/record/863449},
}