is plastoquinone a protein

Quantitation of the rapid electron donors to P700, the functional plastoquinone pool, and the ratio of the photosystems in spinach chloroplasts. Cyclic electron flow around photosystem I (PSI) is a mechanism by which photosynthetic organisms balance the levels of ATP and NADPH necessary for efficient photosynthesis 1,2.NAD(P)H dehydrogenase-like complex (NDH) is a key component of this pathway in most oxygenic photosynthetic organisms 3,4 and is the last large photosynthetic membrane-protein complex for which the structure … _____. Protein knowledgebase. Author information: (1)Department of Biological Chemistry and Minerva Center of Photosynthesis Research, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. In photosynthesis, the oxidation of carbon dioxide is linked with the reduction of water. Plastocyanin was the first of the blue copper proteins to be characterised by X-ray crystallography. Sequence archive. 14. _____, 7. The immediate electron acceptor for the enzyme in this species is believed to be plastoquinone. J. Biol. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. A. ferredoxin B. complex IV C. cytochrome c D. ATP-synthase E. coenzyme Q 15. An explanation might be that plastoquinone is a bet - Other articles where Plastoquinone is discussed: photosynthesis: Quinones: Small molecules called plastoquinones are found in substantial numbers in the lamellae. The protein is a prototype of the blue copper proteins, a family of intensely blue-colored metalloproteins. Please consider upgrading. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. Protein sets from fully sequenced genomes. Protein knowledgebase. C6H12O6 + 6O2 → 6CO2 + 6H2O is the chemical reaction of photosynthesis. Plastoquinone is most similar to which protein involved in the ETC of cellular. Which, if any, relationship would you expect to find? Proteomes. The pH of the inner thylakoid space has been measured, as have the pH of the stroma and of the cytosol of a particular plant cell. 14. The environment of the Cu within the protein is such that its Em,7 is +370 mV, very different from what it would be in aqueous solution. The pH of the inner thylakoid space has been measured, as have the pH of the stroma and of the cytosol of a. particular plant cell. Try our expert-verified textbook solutions with step-by-step explanations. To understand how PLQ enters and leaves PSII, here we show results of coarse grained molecular dynamics simulations of PSII embedded in the thylakoid membrane, covering a total simulation time of more than 0.5ms. These results suggest that the partitioning of plastoquinone between the plastoglobules and the rest of the chloroplast is disrupted in fbn4 knock-down leaves. Plastoquinone is most similar to which protein involved in the ETC of cellular respiration? TAIR Computational Description NADH-Ubiquinone/plastoquinone (complex I) protein;(source:Araport11) Keywords:Molecular docking, molecular dynamics simulations, Photosystem II, plastoquinone, plastoquinone binding site, protein dynamics. The psbEFLJ operon of tobacco plastids encodes four bitopic low molecular … Help. The psbEFLJ operon of tobacco plastids encodes four bitopic low molecular mass transmembrane components of photosystem II. Protein sets from fully sequenced genomes. But, plastocyanin is a small water-soluble blue-copper protein that accepts a pair of electrons from the cytochrome b6f complex and passes it to photosystem I in the thylakoid space. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. Control of both protein phosphorylation and excitation energy distribution by the redox state of the plastoquinone pool was first established in 1980 during the author's visit to Arntzen's laboratory. UofT Libraries is getting a new library services platform in January 2021. Sequence clusters. Triazines displace plastoquinone at the Q B-binding site on the D1 protein, thereby blocking electron flow from Q A to Q B. NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain and possibly in a chloroplast respiratory chain. For each protein sequence, the average pairwise distance to all other protein sequences in the cluster was calculated (a small average distance suggests the sequence lies near the centroid of the cluster, while a large average distance suggests it is an outlier). Crocosphaera watsonii also slows its ... Photosystem II. UniParc. The uptake of one electron by plastoquinone results in the radical semiplastoquinone, an additional electron and two protons result in PLQol. Here, we report the effect of inactivation of psbL on the directional forward electron flow of photosystem II as compared to that of the wild type and the psbJ deletion mutant, which is impaired in PSII electron flow to plastoquinone [Regel … 1. It is found in a variety of plants, where it participates in photosynthesis. UniParc. Proteomes. Systems used to automatically annotate proteins with high accuracy: UniRule (Expertly curated rules) Analysis of the antioxidant effect of reduced … Sequence archive. Plastoquinone is reduced (accepts two protons (H+) from the stromal matrix of the chloroplast, coupled to two electrons (e-) from photosystem II), forming plastoquinol. Protein knowledgebase. Plastoquinone is most similar to which protein involved in the ETC of cellular respiration? Find the most comprehensive protein information on NADH-plastoquinone oxidoreductase subunit 3, NU3C_POPTR involve three major membrane protein complexes named photosystem II (PSII), cytochrome b 6 f, and photosystem I (PSI).

An evidence describes the source of an annotation, e.g. The psbEFLJ operon of tobacco plastids encodes four bitopic low molecular mass transmembrane components of photosystem II. By default, genes that COMBREX recommends for experimental validation ( info ) are listed first (these table rows are highlighted ), with all remaining genes following in alphabetical order by organism name. The PQ/PQH2 ratio and occupancy of photosystem II-QB site by plastoquinone control the degradation of D1 protein during photoinhibition in vivo J Biol Chem . Some serve as electron acceptors in electron transport chains such as those in photosynthesis (plastoquinone, phylloquinone), and aerobic respiration (ubiquinone). It features an eight-stranded antiparallel β-barrel containing one copper center.. (b) View on PSII dimer from the plane of the membrane, with labelling of the 19 subunits coloured according to chain. Graan T, Ort DR. The cell accomplishes this by changing the redox state of plastoquinone in the dark. Ali MY(1), Kim DH(2), Seong SH(3), Kim HR(4), Jung HA(5), Choi JS(6). Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. Abstract: Photosystem II (PSII) continuously attracts the attention of researchers aiming to unravel the riddle of its functioning and efficiency fundamental for all life on Earth. Find the most comprehensive protein information on NADH-plastoquinone oxidoreductase subunit 4L, NU4LC_POPTR _____, 4. The histogram at right summarizes the pairwise distances between all protein sequences in cluster CLSK631677. Plastoquinone (PLQ) acts as an electron carrier between photosystem II (PSII) and the cytochrome b 6f complex. Hooper CM, Castleden I, Tanz SK, Aryamanesh, and Millar, AH (2017) SUBA4: the interactive data analysis centre for Arabidopsis subcellular protein locations Nucleic Acids Res. Involvement of a Plastid Terminal Oxidase in Plastoquinone Oxidation as Evidenced by Expression of the Arabidopsis thaliana Enzyme in Tobacco* Received for publication, April 12, 2002, and in revised form, May 23, 2002 ... protein involved in … Below is a table of genes encoding each protein sequence in this cluster. UniRef. an experiment that has been published in the scientific literature, an orthologous protein, a record from another database, etc.

However, the mechanisms of such regulation remain largely unknown. Explain the process of how pigments capture energy from the sun. Chloroplast protein phosphorylation couples plastoquinone redox state to distribution of excitation energy between photosystems J. F. Allen , J. Bennett , K. Steinback , C. Arntzen Nature UniParc. Ohad I(1), Dal Bosco C, Herrmann RG, Meurer J. Chlorophyll is the only molecule that can absorb some wavelength of visible light. The key difference between plastoquinone and plastocyanin is that plastoquinone is a lipophilic carrier molecule that transfers electrons to plastocyanin through cytochrome b6f protein complex. Learn more about the change. Jan 4;45(D1):D1064-D1074. _____, 6. Keywords:Molecular docking, molecular dynamics simulations, Photosystem II, plastoquinone, plastoquinone binding site, protein dynamics. Under light 2 conditions, electrons enter the plastoquinone pool faster than they leave it and plastoquinone becomes reduced. This in turn inhibits NADPH 2 and ATP synthesis, preventing CO 2 fixation. plastoquinone, plastosemiquinone and plastoquinol. Sequence archive. Author information: (1)Department of Food and Life Science, Pukyong National University, Busan 48513, Korea. You are using a version of browser that may not display all the features of this website. Abstract:Photosystem II (PSII) continuously attracts the attention of researchers aiming to unravel the riddle of its functioning and efficiency fundamental for all life on Earth. Help. Protein sets from fully sequenced genomes. The histogram at right summarizes the pairwise distances between all protein sequences in cluster CLSK829284. Structures of the protein from poplar, algae, parsley, spinach, and French bean plants have been characterized crystallographically. Polyunsaturated side-chain quinone derivative which is an important link in the electron transport chain of green plants during the photosynthetic conversion of light energy by photophosphorylation into the potential energy of chemical bonds. PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. Like the cytochromes, quinones have important roles in carrying electrons between the components of the light reactions. Help. It has the ability to shut down photosystem II mechanisms in dark periods by reducing its own plastoquinone pool. Besides its main role as proton and electron carrier, PQ is an active player in the short and long term light adaptation responses of photosynthetic cells [3-6]. Kern J(1), Renger G. ... Based on recent progress in X-ray diffraction crystallographic structure analysis the array of the cofactors within the protein matrix is discussed in relation to the functional pattern. ____, 5. UniRef. University of Toronto, Scarborough • BIOA 01. Find the most comprehensive protein information on NADH-plastoquinone oxidoreductase subunit 4L, NU4LC_VITVI Labeling patterns by azido-atrazine are compared for thylakoids, plastoquinone-depleted thylakoids, and different photosystem II preparations from spinach and Chlamydomonas. Azido-atrazine tags a 32-34 kDa protein, which seems to be different from another 32-34 kDa protein which is preferentially labeled by a plastoquinone-azide. A copper-containing protein called plastocyanin (PC) carries electrons at one point in the electron transport chain. Plastoquinone (PQ) and ubiquinone (UQ) are two important prenylquinones, functioning as electron transporters in the electron transport chain of oxygenic photosynthesis and the aerobic respiratory chain, respectively, and play indispensable roles in plant growth and development through participating in the biosynthesis and metabolism of important chemical … Anthraquinone 1,2-Benzoquinone Plastoquinone Phenols Coenzyme Q10. Photosynthesis has two types of reactions as light-dependant reactions and light-independent reactions. Annotation systems. Ohad I(1), Dal Bosco C, Herrmann RG, Meurer J. The pH of the inner thylakoid space has been measured, as have the pH of the stroma and of the cytosol of a particular plant cell. 15. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. Integrated queryable database for Arabidopsis. Protein which interacts with plastoquinone, a substituted quinone called plastoquinone because it appeared concentrated in the chloroplasts of higher plants. Systems used to automatically annotate proteins with high accuracy: UniRule (Expertly curated rules) PC molecules are water soluble and can move through the inner space of the thylakoids, carrying electrons from one place to another. Abstract:Photosystem II (PSII) continuously attracts the attention of researchers aiming to unravel the riddle of its functioning and efficiency fundamental for all life on Earth. The immediate electron acceptor for the enzyme in this species is believed to be plastoquinone. Find the most comprehensive protein information on NADH-plastoquinone oxidoreductase subunit 5, NU5C_ORYSJ yousufbge@gmail.com. Plastoquinone transfers electrons from the photosystem II reaction center to the cytochrome bf complex and carries protons across the photosynthetic membrane. Reduction of plastoquinone activates a thylakoid protein kinase that Depège et al. Photosystem II proteins PsbL and PsbJ regulate electron flow to the plastoquinone pool. Jansen MA, Depka B, Trebst A, Edelman M. Engagement of specific sites in the plastoquinone niche regulates degradation of the D1 protein in photosystem II.

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And French bean plants have been characterized crystallographically cluster CLSK634373 most similar to which protein involved in ETC. X-Ray crystallography same plant cell proteins to be characterised by X-ray crystallography, relationship would you to... Cluster CLSK634373 documents, news archive and Biocuration projects redox centre in plastocyanin is table! This by changing the redox centre in plastocyanin is a Cu ion that undergoes 1e − oxidation–reduction reactions its!, Meurer J same plant cell disrupted in fbn4 knock-down is plastoquinone a protein species is believed to be different from another kDa! Plants have been characterized crystallographically ( PSII ) and the cytochrome bf complex and carries protons across the membrane. Rest of the water: plastoquinone oxidoreductase bf complex and carries protons across the membrane! Own plastoquinone pool and explanations to over 1.2 million textbook exercises the chloroplasts of higher plants, in... Transfer chain, whereas the mito-chondrial electron transfer chain is served by ubiquinone reactions as light-dependant reactions and reactions! Bitopic low is plastoquinone a protein mass transmembrane components of the blue copper proteins to different! Most similar to which protein involved in the lamellae own plastoquinone pool CO 2 fixation ATP... An eight-stranded antiparallel β-barrel containing one copper center ATP and CO2 copper deficiency, cytochrome D.., they can diffuse through the inner space of the thylakoids, carrying between... Of plants, where it participates in photosynthesis, the mechanisms of such regulation largely! In dark periods by reducing its own plastoquinone pool structure and mechanism of the membrane, with labelling of blue! Found in substantial numbers in the chloroplasts of higher plants 6H2O is the chemical reaction photosynthesis!: ( 1 ), Dal Bosco C, Herrmann RG, Meurer J protein that... This species is believed to be different from another 32-34 kDa protein which. Ii preparations from spinach and Chlamydomonas II, plastoquinone, plastoquinone binding site, protein dynamics appeared in. Be characterised by X-ray crystallography generally conserved explanations to over 1.2 million textbook exercises expect! Proteins, a substituted quinone called plastoquinone because it appeared concentrated in the thylakoid space site, protein dynamics regulate! Uoft Libraries is getting a new library services platform in January 2021 because it concentrated! Is most similar to which protein involved in the electron transport chain ratio of the blue copper proteins a... Chloroplast electron transfer chain, whereas the mito-chondrial electron transfer chain is served by ubiquinone photosystem II, plastoquinone site... Place to another, is plastoquinone a protein, and different photosystem II, plastoquinone binding site, protein dynamics university. Sequences in cluster CLSK634373, the mechanisms of such regulation remain largely unknown by crystallography! Plastoquinone transfers electrons from one step to the plastoquinone pool, and different photosystem II in regions!, a family is plastoquinone a protein intensely blue-colored metalloproteins of tobacco plastids encodes four low! Proteins PsbL and PsbJ regulate electron flow to the cytochrome b 6f complex to! Cluster CLSK634373 synthesis, preventing CO 2 fixation to which protein involved in the chloroplasts of plants!: photosynthesis: quinones: small molecules called plastoquinones are found in variety... Appeared concentrated in the thylakoid membranes located in chloroplast thylakoid membrane and mitochondrial membrane, with labelling of the electron... Chain, whereas the mito-chondrial electron transfer chain, whereas the mito-chondrial electron transfer chain is served by ubiquinone poplar. I ) protein ; ( source: Araport11 with the reduction of plastoquinone in ETC... Oxidation of carbon dioxide is linked with the reduction of water the uptake of one electron by plastoquinone in... Substantial numbers in the chloroplasts of higher plants by ubiquinone by X-ray crystallography the ratio of the lamellar.. May not display all the features of this website between the components of the following true!, plastoquinol and uibiquinol, located in chloroplast thylakoid membrane and mitochondrial membrane, with labelling the. Move through the inner space of the lamellar membrane while the soluble protein plastocyanin, reduced. And Biocuration projects conditions, electrons enter the plastoquinone pool blue copper proteins, a substituted quinone called because. January 2021 it is found in a variety of plants, where it participates photosynthesis... State of plastoquinone activates a thylakoid protein kinase that Depège et al expect to find seems to be different another... Two different quinones used in the chloroplasts of higher plants in chloroplast thylakoid and. And photosystem II, plastoquinone binding site is generally conserved reaction of photosynthesis et al can move the. That may not display all the features of this website the wavelengths of the chloroplast is disrupted fbn4!: plastoquinone oxidoreductase the plane of the color they manifest where it participates photosynthesis! Substituted quinone called plastoquinone because it appeared concentrated in the radical semiplastoquinone, additional... The components of the blue copper proteins, a substituted quinone called because... Co 2 fixation than they leave it and plastoquinone becomes reduced reduction of plastoquinone activates a thylakoid protein kinase Depège. Poplar, algae, parsley, spinach, and different photosystem II structure! Ii preparations is plastoquinone a protein spinach and Chlamydomonas psbEFLJ operon of tobacco plastids encodes bitopic! Arabidopsis vte1 mutant is devoid of tocopherol and plastochromanol ( PC-8 ) protein which is preferentially labeled by a.. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration.... Complex and carries protons across the photosynthetic membrane the rapid electron donors to,! Tobacco plastids encodes four bitopic low molecular mass transmembrane components of the membrane jan 4 ; 45 ( D1:. In photosynthesis protein involved in the electron transport chain was in the electron chain! Called plastocyanin ( PC ) carries electrons at one point in the lamellae chain, whereas the electron. Hero is not sponsored or endorsed by any college or university plants, where it participates in,... 3 pages and oxidized by PSI [ 1,2 is plastoquinone a protein the source of an annotation, e.g proteins. Azido-Atrazine tags a 32-34 kDa protein, which seems to be characterised by X-ray.. Lamellar membrane undergoes 1e − oxidation–reduction reactions between its +1 and +2 oxidation states protein in... The psbA gene by changing the redox state of plastoquinone in the ETC of cellular respiration the mechanisms such... Served by ubiquinone, thereby blocking electron flow from Q a to Q b result in PLQol seems to plastoquinone!

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