Electron flow through NDH-1 complexes is the major driver of cyclic electron flow-dependent proton pumping in cyanobacteria

Miller, Neil T.; Vaughn, Michael; Burnap, Robert L.

doi:10.1016/j.bbabio.2020.148354

Cited by 27 publications

(31 citation statements)

References 63 publications

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“…Several mechanisms have however been proposed. Firstly, NDH‐1 translocates protons to the thylakoid lumen with a 2H + /e − stoichiometry and thus generates ΔpH (Miller et al, 2021; Schüller et al, 2019). As acidification of the lumen limits the oxidation of PQH 2 in the Q‐cycle in what is referred to as photosynthetic control (Malone et al, 2021), could the proton pumping activity of NDH‐1 enhance PSI oxidation by limiting electron transfer from Cyt b 6 f , thus trapping electrons in the PQ‐pool?…”

Section: Nadh Dehydrogenase‐like Complexesmentioning

confidence: 99%

“…The presence and nature of the FQR‐pathway in cyanobacteria is still poorly characterized, but possible involvement of a Pgr5 homolog in CET has been suggested, although its physiological role would be minor (Yeremenko et al, 2005) with NDH‐1 constituting the main CET pathway in cyanobacteria (Miller et al, 2021). Recently, the Synechocystis Sll1217 protein with low sequence similarity to PGRL1 was proposed to be a functional analog of PGRL1 (Dann & Leister, 2019).…”

Section: Ferredoxin–plastoquinone Reductase Pathwaymentioning

confidence: 99%

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Regulatory electron transport pathways of photosynthesis in cyanobacteria and microalgae: Recent advances and biotechnological prospects

Nikkanen

Solymosi

Jokel

et al. 2021

Physiologia Plantarum

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Cyanobacteria and microalgae perform oxygenic photosynthesis where light energy is harnessed to split water into oxygen and protons. This process releases electrons that are used by the photosynthetic electron transport chain to form reducing equivalents that provide energy for the cell metabolism. Constant changes in environmental conditions, such as light availability, temperature, and access to nutrients, create the need to balance the photochemical reactions and the metabolic demands of the cell. Thus, cyanobacteria and microalgae evolved several auxiliary electron transport (AET) pathways to disperse the potentially harmful over-supply of absorbed energy.AET pathways are comprised of electron sinks, e.g. flavodiiron proteins (FDPs) or other terminal oxidases, and pathways that recycle electrons around photosystem I, like NADPH-dehydrogenase-like complexes (NDH) or the ferredoxin-plastoquinone reductase (FQR). Under controlled conditions the need for these AET pathways is decreased and AET can even be energetically wasteful. Therefore, redirecting photosynthetic reducing equivalents to biotechnologically useful reactions, catalyzed by i.e. innate hydrogenases or heterologous enzymes, offers novel possibilities to apply photosynthesis research.

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Section: Nadh Dehydrogenase‐like Complexesmentioning

confidence: 99%

Section: Ferredoxin–plastoquinone Reductase Pathwaymentioning

confidence: 99%

Regulatory electron transport pathways of photosynthesis in cyanobacteria and microalgae: Recent advances and biotechnological prospects

Nikkanen

Solymosi

Jokel

et al. 2021

Physiologia Plantarum

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“…Due to the high similarity to complex I within the mitochondrial respiratory chain, it was aptly called NDH (NADH dehydrogenase-like complex; Burrows et al, 1998 ). The NDH pathway is the main pathway compared with PGR5 one in cyanobacteria ( Miller et al, 2021 ). It has been reported that NDH pathway plays a crucial role at high temperature or low temperature in tobacco ( Wang et al, 2006 ) and low-light intensity in rice ( Yamori et al, 2015 ) and Marchantia polymorpha ( Ueda et al, 2012 ).…”

Section: Cyclic Electron Transportmentioning

confidence: 99%

The Physiological Functionality of PGR5/PGRL1-Dependent Cyclic Electron Transport in Sustaining Photosynthesis

Liu

Bai

et al. 2021

Front. Plant Sci.

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The cyclic electron transport (CET), after the linear electron transport (LET), is another important electron transport pathway during the light reactions of photosynthesis. The proton gradient regulation 5 (PGR5)/PRG5-like photosynthetic phenotype 1 (PGRL1) and the NADH dehydrogenase-like complex pathways are linked to the CET. Recently, the regulation of CET around photosystem I (PSI) has been recognized as crucial for photosynthesis and plant growth. Here, we summarized the main biochemical processes of the PGR5/PGRL1-dependent CET pathway and its physiological significance in protecting the photosystem II and PSI, ATP/NADPH ratio maintenance, and regulating the transitions between LET and CET in order to optimize photosynthesis when encountering unfavorable conditions. A better understanding of the PGR5/PGRL1-mediated CET during photosynthesis might provide novel strategies for improving crop yield in a world facing more extreme weather events with multiple stresses affecting the plants.

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“…Moreover, it was shown that the NDH-1-PSI supercomplex consumed electrons for CET as quickly as possible, limiting the space required by Fd red diffusion and stabilizing PSI (Gao et al, 2016;Zhao et al, 2018). This accelerated electron consumption is thought to be an antioxidant mechanism, especially when stresses such as high light leads to increased Fd reduction (Miller et al, 2021). These studies suggested that the NDH complex get involved in alleviating the effects of photooxidative stress.…”

Section: Mitigating Oxidative Stress and Stroma Overreductionmentioning

confidence: 99%

“…The type I NADH dehydrogenase (NDH-1) is a multisubunit complex located in the thylakoid membrane (Ohkawa et al, 2000), which is widely found in bacteria, cyanobacteria, higher plants, and animals (Friedrich et al, 1995;Yagi et al, 1998;Friedrich and Scheide, 2000;Brandt et al, 2003;Miller et al, 2021). Previous studies have reported that NDH-2 exists widely in bacteria, some in fungi, plants, and protozoa (protist), but it is not involved in respiration and photosynthetic electron transport (Howitt et al, 1999).…”

Section: Structure Of the Ndh-1 Complex In Cyanobacteriamentioning

confidence: 99%

The Significance of Chloroplast NAD(P)H Dehydrogenase Complex and Its Dependent Cyclic Electron Transport in Photosynthesis

Liu

Bai

et al. 2021

Front. Plant Sci.

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Chloroplast NAD(P)H dehydrogenase (NDH) complex, a multiple-subunit complex in the thylakoid membranes mediating cyclic electron transport, is one of the most important alternative electron transport pathways. It was identified to be essential for plant growth and development during stress periods in recent years. The NDH-mediated cyclic electron transport can restore the over-reduction in stroma, maintaining the balance of the redox system in the electron transfer chain and providing the extra ATP needed for the other biochemical reactions. In this review, we discuss the research history and the subunit composition of NDH. Specifically, the formation and significance of NDH-mediated cyclic electron transport are discussed from the perspective of plant evolution and physiological functionality of NDH facilitating plants’ adaptation to environmental stress. A better understanding of the NDH-mediated cyclic electron transport during photosynthesis may offer new approaches to improving crop yield.

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Electron flow through NDH-1 complexes is the major driver of cyclic electron flow-dependent proton pumping in cyanobacteria

Cited by 27 publications

References 63 publications

Regulatory electron transport pathways of photosynthesis in cyanobacteria and microalgae: Recent advances and biotechnological prospects

Regulatory electron transport pathways of photosynthesis in cyanobacteria and microalgae: Recent advances and biotechnological prospects

The Physiological Functionality of PGR5/PGRL1-Dependent Cyclic Electron Transport in Sustaining Photosynthesis

The Significance of Chloroplast NAD(P)H Dehydrogenase Complex and Its Dependent Cyclic Electron Transport in Photosynthesis

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