caa a22 4500 397522401 CHVBK 20180308164636.0 cr unu---uuuuu 161202e199509 xx s 000 0 eng 10.1093/jxb/46.special_issue.1285 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.special_issue.1285 Portis Archie R. Photosynthesis Research Unit, Agricultural Research Service, US Department of Agriculture and Agronomy Department, University of Illinois, Urbana, IL 61801, USA The regulation of Rubisco by Rubisco activase [Elektronische Daten] [Archie R. Portis] The activity of Rubisco depends on the conversion of the inactive form (E) to the active form (ECM); the binding of the inhibitors CA1P and RuBP to ECM and E, respectively; and the catalytic formation of inhibitory sugar bisphosphates from the enediol intermediate that precedes carboxylation/oxygenation. The regulatory protein, Rubisco activase, modulates the activity of Rubisco by kinetically increasing the dissociation rate of these sugar bisphosphates from their respective enzyme forms in a process that requires ATP hydrolysis. The activity of Rubisco activase is determined by the ATP:ADP ratio. The activity also appears to be influenced by thylakoid membranes in a light-dependent manner, but only a few details of this effect are currently understood. A species dependence in the interaction between heterologous Rubisco and Rubisco activase proteins has been observed. Whether the regulation of Rubisco is a constraint to crop productivity is debatable and will only be decided by detailed study of plants transformed with appropriately modified Rubisco activase and/or Rubisco proteins. © 1995 Oxford University Press Photosynthetic Carbon Reduction nationallicence Rubisco nationallicence Rubisco activase nationallicence Journal of Experimental Botany Oxford University Press 46/special_issue(1995-09), 1285-1291 0022-0957 46:special_issue<1285 1995 46 exbotj https://doi.org/10.1093/jxb/46.special_issue.1285 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.special_issue.1285 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Portis Archie R. Photosynthesis Research Unit, Agricultural Research Service, US Department of Agriculture and Agronomy Department, University of Illinois, Urbana, IL 61801, USA NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/special_issue(1995-09), 1285-1291 0022-0957 46:special_issue<1285 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford