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@ARTICLE{Hdig:902470,
author = {Hüdig, Meike and Tronconi, Marcos A and Zubimendi, Juan P
and Sage, Tammy L and Poschmann, Gereon and Bickel, David
and Gohlke, Holger and Maurino, Veronica G},
title = {{R}espiratory and {C}4-photosynthetic {NAD}-malic enzyme
coexist in bundle sheath cell mitochondria and evolved via
association of differentially adapted subunits},
journal = {The plant cell},
volume = {34},
number = {1},
issn = {1040-4651},
address = {Rockville, Md.},
publisher = {Soc.},
reportid = {FZJ-2021-04289},
pages = {597–615},
year = {2022},
abstract = {In plant mitochondria, nicotinamide adenine dinucleotide
phosphate (NAD)-malic enzyme (NAD-ME) has a housekeeping
function in malate respiration. In different plant lineages,
NAD-ME was independently co-opted in C4 photosynthesis. In
the C4 Cleome species Gynandropsis gynandra and Cleome
angustifolia, all NAD-ME genes (NAD-MEα, NAD-MEβ1, and
NAD-MEβ2) were affected by C4 evolution and are expressed
at higher levels than their orthologs in the C3 species
Tarenaya hassleriana. In Tarenaya hassleriana, the NAD-ME
housekeeping function is performed by two heteromers,
NAD-MEα/β1 and NAD-MEα/β2, with similar biochemical
properties. In both C4 species, this role is restricted to
NAD-MEα/β2. In the C4 species, NAD-MEα/β1 is exclusively
present in the leaves, where it accounts for most of the
enzymatic activity. GgNAD-MEα/β1 exhibits high catalytic
efficiency and is differentially activated by the C4
intermediate aspartate, confirming its role as the
C4-decarboxylase. During C4 evolution, NAD-MEβ1 lost its
catalytic activity; its contribution to the enzymatic
activity results from a stabilizing effect on the associated
α-subunit and the adquisition of regulatory properties. We
conclude that in bundle sheath cell mitochondria of C4
species, the functions of NAD-ME as C4 photosynthetic
decarboxylase and as a housekeeping enzyme coexist and are
performed by isoforms that combine the same α subunit with
differentially adapted β subunits.},
cin = {IBG-4 / JSC / NIC / IBI-7},
ddc = {540},
cid = {I:(DE-Juel1)IBG-4-20200403 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)NIC-20090406 / I:(DE-Juel1)IBI-7-20200312},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217) / 2172 - Utilization of renewable
carbon and energy sources and engineering of ecosystem
functions (POF4-217) / 5111 - Domain-Specific Simulation
$\&$ Data Life Cycle Labs (SDLs) and Research Groups
(POF4-511) / Forschergruppe Gohlke $(hkf7_20200501)$ / 5241
- Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-2171 / G:(DE-HGF)POF4-2172 /
G:(DE-HGF)POF4-5111 / $G:(DE-Juel1)hkf7_20200501$ /
G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34734993},
UT = {WOS:000745840600036},
doi = {10.1093/plcell/koab265},
url = {https://juser.fz-juelich.de/record/902470},
}