Carbon Fixation

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The enzyme [[RuBisCO]] catalyses the carboxylation of <scene name='94/942630/Cv/1'>ribulose-1,5-bisphosphate</scene>, RuBP, a 5-carbon compound, by carbon dioxide (a total of 6 carbons) in a two-step reaction. The product of the first step is enediol-enzyme complex that can capture CO2 or O2. Thus, enediol-enzyme complex is the real carboxylase/oxygenase. The CO2 that is captured by enediol in second step produces an unstable six-carbon compound called 2-carboxy 3-keto 1,5-biphosphoribotol (CKABP) (or 3-keto-2-carboxyarabinitol 1,5-bisphosphate) that immediately splits into 2 molecules of <scene name='39/392339/Cv1/6'>3-phosphoglycerate</scene>, a 3-carbon compound.
The enzyme [[RuBisCO]] catalyses the carboxylation of <scene name='94/942630/Cv/1'>ribulose-1,5-bisphosphate</scene>, RuBP, a 5-carbon compound, by carbon dioxide (a total of 6 carbons) in a two-step reaction. The product of the first step is enediol-enzyme complex that can capture CO2 or O2. Thus, enediol-enzyme complex is the real carboxylase/oxygenase. The CO2 that is captured by enediol in second step produces an unstable six-carbon compound called 2-carboxy 3-keto 1,5-biphosphoribotol (CKABP) (or 3-keto-2-carboxyarabinitol 1,5-bisphosphate) that immediately splits into 2 molecules of <scene name='39/392339/Cv1/6'>3-phosphoglycerate</scene>, a 3-carbon compound.
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*[[RuBisCO]]
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*[[Rubisco and Crop Output]]
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*[[RuBisCO (Hebrew)]]
</StructureSection>
</StructureSection>
== References ==
== References ==
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Revision as of 11:13, 19 December 2022

Spinach RuBisCO 8 large and 8 small chains complex with substrate ribulose-1,5- bisphosphate, 1rcx

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References

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Alexander Berchansky

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