CLASSIFICATION: BIOLOGICAL SCIENCES, BIOCHEMISTRY Characterization of the hetero-oligomeric red-type rubisco activase from red algae Short title: Hetero-oligomeric rubisco activase from red algae Key words: Rubisco, activase, photosynthesis, AAA+ proteins, red algae
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منابع مشابه
Characterization of the heterooligomeric red-type rubisco activase from red algae.
The photosynthetic CO2-fixing enzyme ribulose 1,5-bisphosphate carboxylase/oxygenase (rubisco) is inhibited by nonproductive binding of its substrate ribulose-1,5-bisphosphate (RuBP) and other sugar phosphates. Reactivation requires ATP-hydrolysis-powered remodeling of the inhibited complexes by diverse molecular chaperones known as rubisco activases (Rcas). Eukaryotic phytoplankton of the red ...
متن کاملChaperones for folding, assembly and maintenance of Rubisco
Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) is responsible for the fixation of atmospheric CO2 in photosynthesis. Rubisco is not only the most abundant protein in nature but also one with a remarkably high chaperone requirement for folding, assembly and maintenance. The major form of Rubisco (form I) is hexadecameric, consisting of 8 large (RbcL) and 8 small (RbcS) subunits. The f...
متن کاملIdentification and characterization of multiple rubisco activases in chemoautotrophic bacteria
Ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) is responsible for almost all biological CO2 assimilation, but forms inhibited complexes with its substrate ribulose-1,5-bisphosphate (RuBP) and other sugar phosphates. The distantly related AAA+ proteins rubisco activase and CbbX remodel inhibited rubisco complexes to effect inhibitor release in plants and α-proteobacteria, respectively...
متن کاملAssociation of Rubisco activase with chaperonin-60beta: a possible mechanism for protecting photosynthesis during heat stress.
Previous studies have shown that inhibition of photosynthesis by moderate heat stress is a consequence of Rubisco deactivation, caused in part by the thermal instability of Rubisco activase. This involvement of Rubisco activase was confirmed in heat stress and recovery experiments using transgenic Arabidopsis plants. Compared with wild-type plants, photosynthesis, the effective quantum yield of...
متن کاملTwo residues of rubisco activase involved in recognition of the Rubisco substrate.
Rubisco activase is an AAA(+) protein, a superfamily with members that use a "Sensor 2" domain for substrate recognition. To determine whether the analogous domain of activase is involved in recognition of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC 4.1.1.39), two chimeric activases were constructed, interchanging a Sensor 2-containing region between activases from spinach and ...
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