Teruo Ogawa - Academia.edu (original) (raw)

Papers by Teruo Ogawa

Iubmb Life, 2015

Cyanobacterial NADPH dehydrogenase (NDH-1) or NDH-1-like complex is localized in the thylakoid me... more Cyanobacterial NADPH dehydrogenase (NDH-1) or NDH-1-like complex is localized in the thylakoid membrane and participates in a variety of bioenergetic reactions, including respiration, cyclic electron transport around photosystem I and CO2 uptake. Over the past decade, a significant achievement has been made in identifying seven oxygenic photosynthesis-specific (OPS) subunits of NDH-1 enzyme, NdhL to NdhQ and NdhS, in several cyanobacterial strains. Six of them are also found in higher plants but not in nonphototrophs. This indicates an exclusive existence of these OPS Ndh subunits in oxygenic photosynthetic organisms and suggested certain role of cyanobacterial and chloroplastic NDH-1 in photosynthetic reactions. In this review, we describe these seven OPS subunits of cyanobacterial NDH-1, focusing on their identification, localization, function, and evolution from cyanobacteria to higher plants. A crucial role of these OPS subunits on the function of cyanobacterial NDH-1 is proposed. © 2015 IUBMB Life, 67(1):3-8, 2015.

... Acquisition by Cyanobacteria: Mechanisms, Comparative Genomics, and Evolution Aaron Kaplan, M... more ... Acquisition by Cyanobacteria: Mechanisms, Comparative Genomics, and Evolution Aaron Kaplan, Martin Hagemann, Hermann Bauwe, Shira Kahlon, and ... significant accumulation of glycolate and glyoxylate was found (Norman and Colman, 1988; Renström and Bergman, 1989 ...

Environmental Microbiology, Apr 25, 2011

SummarySimultaneous catabolic and anabolic glucose metabolism occurs in the same compartment duri... more SummarySimultaneous catabolic and anabolic glucose metabolism occurs in the same compartment during photomixotrophic growth of the model cyanobacterium Synechocystis sp. PCC 6803. The presence of glucose is stressful to the cells; it is reflected in the high frequency of suppression mutations in glucose‐sensitive mutants. We show that glucose affects many cellular processes. It stimulates respiration and the rate of photosynthesis and quantum yield in low‐ but not high‐CO2‐grown cells. Fluorescence and thermoluminescence parameters of photosystem II are also affected but the results did not lend support to sustained glucose driven over reduction in the light. Glucose‐sensitive mutants such as ΔpmgA (impaired in photomixotrophic growth) and Δhik31 (lacking histidine kinase 31) are far more susceptible under high than low air level of CO2. A glycine to tryptophan mutation in position 354 in NdhF3, involved in the high‐affinity CO2 uptake, rescued ΔpmgA. A rise in the apparent photosynthetic affinity to external inorganic carbon is observed in high‐CO2‐grown wild‐type cells after the addition of glucose, but not in mutant ΔpmgA. This is attributed to upregulation of certain low‐CO2‐induced genes, involved in inorganic carbon uptake, in the wild type but not in ΔpmgA. These data uncovered a new level of interaction between CO2 fixation (and the CO2‐concentrating mechanism) and photomixotrophic growth in cyanobacteria.

Journal of Biological Chemistry, Aug 1, 2002

Plant Physiology, Apr 18, 2016

Journal of Biological Chemistry, Sep 1, 2014

Plant Physiology, Apr 14, 2015

Journal of Biological Chemistry, Jul 1, 2014

Plant Physiology, Sep 12, 2016

Journal of Biological Chemistry, Oct 1, 2000

Photosynthetica, Mar 1, 2018

Biochimica Et Biophysica Acta - Bioenergetics, Jun 1, 2007

Phycobilisomes (PBS) are the major accessory light-harvesting complexes in cyanobacteria and thei... more Phycobilisomes (PBS) are the major accessory light-harvesting complexes in cyanobacteria and their mobility affects the light energy distribution between the two photosystems. We investigated the effect of PBS mobility on state transitions, photosynthetic and respiratory electron transport, and various fluorescence parameters in Synechocystis sp. strain PCC 6803, using glycinebetaine to immobilize and couple PBS to photosystem II (PSII) or photosystem I (PSI) by applying under far-red or green light, respectively. The immobilization of PBS at PSII inhibited the increase in cyclic electron flow, photochemical and non-photochemical quenching, and decrease in respiration that occurred during the movement of PBS from PSII to PSI. In contrast, the immobilization of PBS at PSI inhibited the increase in respiration and photochemical quenching and decrease in cyclic electron flow and non-photochemical quenching that occurred when PBS moved from PSI to PSII. Linear electron transport did not change during PBS movement but increased or decreased significantly during longer illumination with far-red or green light, respectively. This implies that PBS movement is completed in a short time but it takes longer for the overall photosynthetic reactions to be tuned to a new state.

Journal of Luminescence, 2007

Plant and Cell Physiology, Oct 1, 2006

Plant and Cell Physiology, Jun 1, 2008

Science Access, 2001

Zinc is an abundant transition metal in the biosphere. Because of its Lewis acidity, flexible cor... more Zinc is an abundant transition metal in the biosphere. Because of its Lewis acidity, flexible cordination geometry, rapid ligand exchange property and absence of redox activity, Zn is used as a metal of choice in many biological reactions. In addition, Zn-binding Zn finger protein form an important class of DNA-binding transcriptional regulators. A number of Zn transporter systems have been identified in yeast, human and plants. An ABC-type Zn-permease and a Zn-binding repressor protein have been identified in E. coli. The complete genome sequence of Synechocystis PCC 6803 revealed that the slr2043-slr2044-slr2045 cluster of ORFs are homologous to the mntCAB (encoding a Mn-permease). Inactivation of each of these ORFs in this study resulted in mutant strains that grow poorly in the absence of added Zn in the growth medium. Analysis of these mutant strains has established that this operon encodes a Zn-uptake transporter. Zn is toxic to the cells and Synechocystis possesses Zn exporter encoded by slr0798 to keep the intracellular Zn concentration at low level. DNA microarray analysis revealed that the expression of many genes is up-regulated or down-regulated in response to the increase of external Zn concentration. We shall enlist these genes.

Plant Physiology, Jul 28, 2006

Springer eBooks, 2008

A highly active NADPH dehydrogenase super-complex mediating both cyclic electron flow and respira... more A highly active NADPH dehydrogenase super-complex mediating both cyclic electron flow and respiratory flow was identified in the cyanobacterium Synechocystis sp. strain PCC 6803. Active staining of NADPH-nitroblue tetrazolium oxidoreductase, Western blotting, redox changes of P700, and measurements of respiration were carried out with the cells treated by exogenous glucose (Glc) or 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) at several time points. The expression and enzyme activity levels of this NADPH dehydrogenase supercomplex were gradually inhibited accompanying the addition of exogenous Glc but significantly stimulated in the presence of DCMU. Though PSIdependent cyclic electron transport was decreased in Glc-treated cells, respiration rate was accelerated. Unexpectedly, both cyclic PSI and respiration rate were decreased in the presence of DCMU. Based on the Glc caused the partial reduction of plastoquinone pool while DCMU resulted in the over-oxidation of plastoquinone pool, we suggest that the expression and activity of NADPH dehydrogenase supercomplex is under redox control while the operation of both cyclic and respiratory electron flow mediated by this active super-complex needs an appropriate redox poise of the plastoquinone pool.

Kluwer Academic Publishers eBooks, Mar 1, 2006

Metals play important roles in all phases of oxygenic photosynthesis in cyanobacteria, eukaryotic... more Metals play important roles in all phases of oxygenic photosynthesis in cyanobacteria, eukaryotic algae and green plants. For the photosynthetic electron transport reactions in the thylakoid membranes, iron, copper, manganese and magnesium are essential cofactors in various proteins and pigment-protein complexes. Zinc, iron and magnesium also play critical roles during the carbon-fixation reactions. In addition, iron, copper and zinc are constituents of superoxide dismutase and other protective enzymes that are essential to maintain the integrity and function of the photosynthetic apparatus in its highly reactive environment. Inside any living cell, concentrations of various metals are maintained within specific ranges. If the concentration of any metal is below a lower threshold level, organisms suffer from this metal ion deficiency. On the other hand, excess amount of many metals can be toxic. Since metals are both essential and potentially toxic, they are under strict homeostatic control that requires a balance between their uptake and efflux. Usually, metals are transported across cell and organellar membranes via specific transporters. Many families of metal uptake and efflux transporters have recently been described in both prokaryotes and eukaryotes. In 1996, the publication of the complete genome sequence of the cyanobacterium Synechocystis sp. PCC 6803, an oxygenic photosynthetic organism, provided valuable information about a number of potential metal transporters in this organism. During the past few years, genetic and biochemical dissection of some of these transporters has yielded important functional data about both the transport processes and their regulations, for a number of metals. Recent completion of the genome sequence of the Arabidopsis thaliana has opened additional exciting opportunities for functional genomic analysis of metal homeostasis and its influence on photosynthesis. In this chapter, we discuss transport of iron, copper, manganese, zinc and magnesium, primarily using the Synechocystis 6803 paradigm.

Photosynthesis: Mechanisms and Effects, 1998