Enhanced Reduction of Ferredoxin in PGR5-Deficient Mutant of
Feb 26, 2024 · In this study, we analyzed the impact of reduced Fd on Fd-CEF activity by comparing wild-type and pgr5-deficient mutants (pgr5hope1). PGR5 has been proposed as the mediator of Fd-CEF, and pgr5hope1 exhibited a comparable CO 2 assimilation rate and the same reduction–oxidation level of PQ as the wild type.
Enhanced Reduction of Ferredoxin in PGR5-Deficient Mutant of
Feb 26, 2024 · PGR5 has been proposed as the mediator of Fd-CEF, and pgr5hope1 exhibited a comparable CO 2 assimilation rate and the same reduction-oxidation level of PQ as the wild type. However, P700 oxidation was suppressed with highly …
PGR5-Dependent Cyclic Electron Flow Protects Photosystem I …
We artificially enhanced donor- and acceptor-side regulation in the wild-type and pgr5 backgrounds by introducing the pgr1 mutation conferring the hypersensitivity of the cytochrome b6f complex to luminal acidification and moss Physcomitrella patens …
The key cyclic electron flow protein PGR5 associates with
Mar 4, 2021 · PGR5 is a small protein that accumulates to low levels and lacks a metal-binding motif; therefore, it is unlikely that PGR5 itself directly transports electrons from Fd to PQ 12.
Frontiers | The Physiological Functionality of PGR5/PGRL1 …
Jul 7, 2021 · There are at least two CET pathways in vascular plants and Phycophyta: antimycin A-sensitive pathway that involves proton gradient regulation 5 (PGR5) and PGR5-like photosynthetic phenotype 1 (PGRL1), and antimycin A-insensitive NADH dehydrogenase-like (NDH) pathway (Figure 1A; Munekage et al., 2002; Huang et al., 2005; Dalcorso et al., 2008 ...
Proton Gradient Regulation 5-Mediated Cyclic Electron Flow under …
The PGR5/proton gradient regulation-like1 (PGRL1) ferredoxin (Fd) pathway, involved in recycling excess reductant to increase ATP synthesis, may be controlled by extreme photosystem I acceptor side limitation or ATP depletion. Here, we show that PGR5/PGRL1-Fd CEF functions in accordance with an ATP/redox control model.
PGRL2 triggers degradation of PGR5 in the absence of PGRL1
Jun 24, 2021 · PGRL2 can interact with PGR5 and PGRL1, and destabilizes PGR5 in Synechocystis. a Chloroplast localization of PGRL2-eGFP. Chloroplasts were isolated from oePGRL2-eGFP plants and separated into insoluble (Insol) and soluble (Sol) fractions.
PGR5-PGRL1-Dependent Cyclic Electron Transport Modulates …
Feb 1, 2016 · The PGR5-PGRL1 protein complex mediates the second CET circuit, accepting electrons from Fd and reducing the PQ pool, thus acting as an Fd-PQ reductase (FQR; Hertle et al., 2013). PGR5 owes its name to the high chlorophyll fluorescence phenotype at high light intensities shown by the corresponding missense mutant, which destabilizes the protein ...
Enhanced Reduction of Ferredoxin in PGR5-deficient mutant of
Jan 17, 2024 · The present in vivo research clearly shows that the expression of Fd-CEF activity requires reduced Fd in addition to oxidized PQ, and PGR5 does not catalyze Fd-CEF. The molecular entity that catalyzes ferredoxin (Fd)-dependent cyclic electron flow around photosystem I (PSI) (Fd-CEF) remains unknown.
We arti ficially enhanced donor- and acceptor-side regulation in the wild-type and pgr5 backgrounds by introducing the pgr1 mutation conferring the hypersensitivity of the cytochrome b6f complex to luminal acidi cation and moss fi Physcomitrella patens …
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