Ribulose 1,5-bisphosphate (RuBP) is an organic substance that is involved in photosynthesis, notably as the principal CO2 acceptor in plants. [1]: 2 It is a colourless anion, a double phosphate ester of the ketopentose (ketone -containing sugar with five carbon atoms) called ribulose.

2021年9月28日 · In the stroma, in addition to CO 2, two other chemicals are present to initiate the Calvin cycle: an enzyme abbreviated RuBisCO, and the molecule ribulose bisphosphate (RuBP). RuBP has five atoms of carbon and a phosphate group on each end.

2023年4月7日 · RuBP refers to an organic substance that is involved in photosynthesis, notably as the principal CO 2 acceptor in plants, while RuBisCO refers to an enzyme present in plant chloroplasts, involved in fixing atmospheric carbon dioxide during photosynthesis and in oxygenation of the resultant compound during photorespiration.

2025年1月12日 · Ribulose-1,5-bisphosphate (RuBP) is a key molecule in photosynthesis, enabling plants to convert carbon dioxide into organic compounds. This transformation supports the global carbon cycle and provides energy-rich molecules essential for growth and survival.

Rubisco catalyzes the incorporation of CO 2 into the 5-carbon sugar ribulose-1,5-bisphosphate (RuBP), yielding two molecules of 3-phosphoglyceric acid (3PGA). Based on the functional features of the enzyme, this Rubisco-dependent carboxylation reaction is considered a limiting step in the cycle as a whole (Andralojc et al., 2018).

Ribulose-1,5-bisphosphate (RuBP) carboxylase-oxygenase (Rubisco) enzyme is the limiting step of photosynthetic carbon fixation, and its activation is regulated by its co-evolved chaperone, Rubisco activase (Rca).

The enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalyzes the addition of CO 2 to ribulose-1,5-bisphosphate (RuBP), which is quantitatively the most significant reaction converting inorganic carbon to organic carbon, thereby sustaining the …

RuBP (ribulose 1,5-biphosphate) is a five-carbon sugar which reacts with CO 2 in the first step of the Calvin cycle for fixing carbon in photosynthetic systems. That reaction is catalyzed by the large enzyme rubisco.

Ribulose bisphosphate (RuBP) is consumed in the carboxylating step of carbon fixation. If such fixation is to continue, RuBP must be regenerated, and in this case via the PCR cycle.

2023年5月25日 · Carboxylation of ribulose-1,5-bisphosphate (RuBP) is the first step in the Calvin-Benson-Bassham (CBB) cycle, which requires the activation of Rubisco through carbamylation of a...