A Complex Containing PGRL1 and PGR5 Is Involved in the Switch between Linear and Cyclic Electron Flow in Arabidopsis

DalCorso, Giovanni; Pesaresi, Paolo; Masiero, Simona; Aseeva, Elena; Schünemann, Danja; Finazzi, Guido; Joliot, Pierre; Barbato, Roberto; Leister, Dario

doi:10.1016/j.cell.2007.12.028

Cited by 508 publications

(514 citation statements)

References 42 publications

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“…During the dark-to-light (80 mmol photons s 21 m 22 ) transition, NPQ was transiently induced to 0.8 within 1 min in wild-type plants (Fig. 1, A and B); this phenomenon is closely related to acidification of the thylakoid lumen, which is likely caused by the activation of cyclic electron transport around PSI (Munekage et al, 2002;DalCorso et al, 2008). Due to the activation of ATP synthase upon illumination, proton efflux from the thylakoid lumen occurs via chloroplast ATP synthase, and NPQ is rapidly relaxed within 2 min postinduction in the wild type (Fig.…”

Section: Isolation Of the Bfa3 Mutantmentioning

confidence: 99%

BIOGENESIS FACTOR REQUIRED FOR ATP SYNTHASE 3 Facilitates Assembly of the Chloroplast ATP Synthase Complex

et al. 2016

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Thylakoid membrane-localized chloroplast ATP synthases use the proton motive force generated by photosynthetic electron transport to produce ATP from ADP. Although it is well known that the chloroplast ATP synthase is composed of more than 20 proteins with a 3 b 3 g 1 « 1 d 1 I 1 II 1 III 14 IV 1 stoichiometry, its biogenesis process is currently unclear. To unravel the molecular mechanisms underlying the biogenesis of chloroplast ATP synthase, we performed extensive screening for isolating ATP synthase mutants in Arabidopsis (Arabidopsis thaliana). In the recently identified bfa3 (biogenesis factors required for ATP synthase 3) mutant, the levels of chloroplast ATP synthase subunits were reduced to approximately 25% of wild-type levels. In vivo labeling analysis showed that assembly of the CF 1 component of chloroplast ATP synthase was less efficient in bfa3 than in the wild type, indicating that BFA3 is required for CF 1 assembly. BFA3 encodes a chloroplast stromal protein that is conserved in higher plants, green algae, and a few species of other eukaryotic algae, and specifically interacts with the CF 1 b subunit. The BFA3 binding site was mapped to a region in the catalytic site of CF 1 b. Several residues highly conserved in eukaryotic CF 1 b are crucial for the BFA3-CF 1 b interaction, suggesting a coevolutionary relationship between BFA3 and CF 1 b. BFA3 appears to function as a molecular chaperone that transiently associates with unassembled CF 1 b at its catalytic site and facilitates subsequent association with CF 1 a during assembly of the CF 1 subcomplex of chloroplast ATP synthase.

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Section: Isolation Of the Bfa3 Mutantmentioning

confidence: 99%

BIOGENESIS FACTOR REQUIRED FOR ATP SYNTHASE 3 Facilitates Assembly of the Chloroplast ATP Synthase Complex

et al. 2016

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“…thaliana [33,34]. A. thaliana has an alternative pathway that is dependent on PSI-NDH complex (reviewed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Light-harvesting antenna complexes in the moss Physcomitrella patens: implications for the evolutionary transition from green algae to land plants

Iwai

Yokono

2017

Current Opinion in Plant Biology

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Light-harvesting antenna complexes in the moss Physcomitrella patens: implications for the evolutionary transition from green algae to land plants Plants have successfully adapted to a vast range of terrestrial environments during their evolution. To elucidate the evolutionary transition of light-harvesting antenna proteins from green algae to land plants, the moss Physcomitrella patens is ideally placed basally among land plants. Compared to the genomes of green algae and land plants, the P. patens genome codes for more diverse and redundant light-harvesting antenna proteins. It also encodes Lhcb9, which has characteristics not found in other light-harvesting antenna proteins. The unique complement of light-harvesting antenna proteins in P. patens appears to facilitate protein interactions that include those lost in both green algae and land plants with regard to stromal electron transport pathways and photoprotection mechanisms. This review will highlight unique characteristics of the P. patens light-harvesting antenna system and the resulting implications about the evolutionary transition during plant terrestrialization.

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“…31,32,34 Thus, CET appears to be important for providing a sufficient proton motive force, which in turn attenuates PSII activity through the induction of the NPQ photoprotective mechanism. 9 That is obtained through the protonation of two glutamic acid residues in the lumenexposed loop of PsbS protein, [43][44][45] which is a component of PSII, and the activation of the Violaxanthin De-Epoxidase (VDE) that converts violaxanthin into zeaxanthin within the xanthophyll cycle.…”

Section: Pgr5-dependent Cet and Photosynthesis Controlmentioning

confidence: 99%

“…33 According to the commonly accepted view, the PGR5-PGRL1 dependent CET is assumed to sustain the ratio between ATP and NADPH (ATP/NADPH D 3/2), required for CO 2 fixation in the CalvinBenson-Bassham cycle. [34][35][36] However, the detailed characterization of pgr5 and pgrl1 mutants in Arabidopsis thaliana (hereafter: Arabidopsis), 31,32,34 and more recently in rice 37,38 and Chlamydomonas reinhardtii (hereafter: Chlamydomonas), [39][40][41][42] has allowed to associate novel functions to CET.…”

Section: Pgr5-dependent Cet and Photosynthesis Controlmentioning

confidence: 99%

“…PGR5 (Proton Gradient Regulation 5) 31 together with PGRL1 (PGR5-like photosynthetic phenotype 1) 32 form the protein complex that mediates cyclic electron transport around PSI, accepting electrons from ferredoxin (Fd) and reducing the PQ pool, thus acting as an Fd-PQ reductase (FQR). 33 According to the commonly accepted view, the PGR5-PGRL1 dependent CET is assumed to sustain the ratio between ATP and NADPH (ATP/NADPH D 3/2), required for CO 2 fixation in the CalvinBenson-Bassham cycle.…”

Section: Pgr5-dependent Cet and Photosynthesis Controlmentioning

confidence: 99%

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Photosynthesis Control: An underrated short-term regulatory mechanism essential for plant viability

Colombo

Suorsa

Rossi

et al. 2016

Plant Signaling & Behavior

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Regulation of photosynthetic electron transport provides efficient performance of oxygenic photosynthesis in plants. During the last 15 years, the molecular bases of various photosynthesis shortterm regulatory processes have been elucidated, however the wild type-like phenotypes of mutants lacking of State Transitions, Non Photochemical Quenching, or Cyclic Electron Transport, when grown under constant light conditions, have also raised doubts about the acclimatory significance of these shortregulatory mechanisms on plant performance. Interestingly, recent studies performed by growing wild type and mutant plants under field conditions revealed a prominent role of State Transitions and Non Photochemical Quenching on plant fitness, with almost no effect on vegetative plant growth. Conversely, the analysis of plants lacking the regulation of electron transport by the cytochrome b 6 f complex, also known as Photosynthesis Control, revealed the fundamental role of this regulatory mechanism in the survival of young, developing seedlings under fluctuating light conditions.

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A Complex Containing PGRL1 and PGR5 Is Involved in the Switch between Linear and Cyclic Electron Flow in Arabidopsis

Cited by 508 publications

References 42 publications

BIOGENESIS FACTOR REQUIRED FOR ATP SYNTHASE 3 Facilitates Assembly of the Chloroplast ATP Synthase Complex

BIOGENESIS FACTOR REQUIRED FOR ATP SYNTHASE 3 Facilitates Assembly of the Chloroplast ATP Synthase Complex

Light-harvesting antenna complexes in the moss Physcomitrella patens: implications for the evolutionary transition from green algae to land plants

Photosynthesis Control: An underrated short-term regulatory mechanism essential for plant viability

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