ArticleNature communications2011
Photosynthetic growth despite a broken Q-cycle.
Article in Nature communications, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 57 citations in OpenAlex.
- Chloride dependence of photosystem II operation in the hypercarbonate-requiring cyanobacterium Limnospira maxima.Photosynthesis research · 2026Article
- Dissecting Bioelectrical Networks in Photosynthetic Membranes with Electrochemistry.Journal of the American Chemical Society · 2025Article
- The stromal side of the cytochrome b6f complex regulates state transitions.The Plant cell · 2024Article
- Catalytic Reactions and Energy Conservation in the CytochromeChemical reviews · 2021Review
- Universal free-energy landscape produces efficient and reversible electron bifurcation.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- A Commonly Used Photosynthetic Inhibitor Fails to Block Electron Flow to Photosystem I in Intact Systems.Frontiers in plant science · 2020Article
- Role of ClpP in the Biogenesis and Degradation of RuBisCO and ATP Synthase inPlants (Basel, Switzerland) · 2019Article
- Electronic connection between the quinone and cytochrome C redox pools and its role in regulation of mitochondrial electron transport and redox signaling.Physiological reviews · 2015Article
- Structural analysis of diheme cytochrome c by hydrogen-deuterium exchange mass spectrometry and homology modeling.Biochemistry · 2014Article
- Thylakoid FtsH protease contributes to photosystem II and cytochrome b6f remodeling in Chlamydomonas reinhardtii under stress conditions.The Plant cell · 2014Article
- Photosynthesis-related quantities for education and modeling.Photosynthesis research · 2013Review
- Triplet state of the semiquinone-Rieske cluster as an intermediate of electronic bifurcation catalyzed by cytochrome bc1.Biochemistry · 2013Article
- Novel thylakoid membrane GreenCut protein CPLD38 impacts accumulation of the cytochrome b6f complex and associated regulatory processes.The Journal of biological chemistry · 2013Article
- Enzymatic activities of isolated cytochrome bc₁-like complexes containing fused cytochrome b subunits with asymmetrically inactivated segments of electron transfer chains.Biochemistry · 2012Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Central in respiration or photosynthesis, the cytochrome bc(1) and b(6)f complexes are regarded as functionally similar quinol oxidoreductases. They both catalyse a redox loop, the Q-cycle, which couples electron and proton transfer. This loop involves a bifurcated electron transfer step considered as being mechanistically mandatory, making the Q-cycle indispensable for growth. Attempts to falsify this paradigm in the case of cytochrome bc(1) have failed. The rapid proteolytic degradation of b(6)f complexes bearing mutations aimed at hindering the Q-cycle has precluded so far the experimental assessment of this model in the photosynthetic chain. Here we combine mutations in Chlamydomonas that inactivate the redox loop but preserve high accumulation levels of b(6)f complexes. The oxidoreductase activity of these crippled complexes is sufficient to sustain photosynthetic growth, which demonstrates that the Q-cycle is dispensable for oxygenic photosynthesis.
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