T enzyme Rubisco, short for ribulose1,5-bisphosphate carboxylaseyoxygenase, is the enzyme that incorporates CO2 into plants during photosynthesis. As it constitutes about 30% of the total protein in a plant leaf, Rubisco is probably the most abundant protein on earth and a major sink for plant nitrogen. Rubisco is widely accepted as the ultimate rate-limiting step in photosynthetic carbon fixat...

To realize a circular, carbon-neutral economy, it will become important to utilize the greenhouse gas CO2 as sustainable carbon source. Carboxylases, enzymes that capture and convert gaseous are prime candidates pave way towards realizing this vision of CO2-based bio-economy. In last couple years, interest in using engineering carboxylases has been steadily growing. Here, we discuss how basic r...

The regulation of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) activity by 2-carboxyarabinitol 1-phosphate (CA1P) was investigated using gas-exchange analysis of antisense tobacco (Nicotiana tabacum) plants containing reduced levels of Rubisco activase. When an increase in light flux from darkness to 1200 &mgr;mol quanta m-2 s-1 was followed, the slow increase in CO2 assimilation b...

The photo-assisted carbon dioxide (CO2) hydrogenation provides an efficient and straightforward method for producing solar fuels with high efficiency. However, the development of highly catalysts controllable selectivity long-term stability still faces major challenges. This study proves that energy can promote CO2 over Cu/ZnO efficiently at atmospheric pressure reduction products be controlled...

C4 leaf phosphoenolpyruvate carboxylase (PEPC; EC 4.1.1.31) is subject to a day/night regulatory phosphorylation cycle. By using the cytoplasmic protein synthesis inhibitor cycloheximide (CHX), we previously reported that the reversible in vivo light activation of the C4 PEPC protein-serine kinase requires protein synthesis. In the present leaf gas-exchange study, we have examined how and to wh...

The interaction between CO2 and ultrathin ZnO supported on Au(111) has been studied using temperature programmed desorption (TPD) and density functional theory (DFT) calculations. We find that CO2 binds weakly on the planar ZnO bilayer and trilayer surfaces, desorbing at T = 130 K. CO2 binds more strongly at the steps formed between ZnO bilayers and trilayers, desorbing at T = 285-320 K dependi...

Complex mechanisms that detect changes in brainstem parenchymal PCO2/[H+] and trigger adaptive changes in lung ventilation are responsible for central respiratory CO2 chemosensitivity. Previous studies of chemosensory signalling pathways suggest that at the level of the ventral surface of the medulla oblongata (VMS), CO2-induced changes in ventilation are (at least in part) mediated by the rele...

Thermodynamic calculations revealed that 10 to 100-fold increases in reaction rate are obtainable with added CO2 (0.1–1 MPa) for an acid-catalyzed reaction in hightemperature liquid water (HTW) that is first order in H concentration. These calculations suggest that CO2 is most effective as a rate-enhancing additive in HTW at lower temperatures (150–2008C). When compared with increased temperatu...