Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Rubisco

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1395-2

Definition

Rubisco is the acronym of d-ribulose 1,5-bisphosphate carboxylase-oxygenase. This enzyme catalyzes the carboxylation of ribulose 1,5-bisphosphate (RuBP) as a first step in the Calvin-Benson-Bassham cycle yielding two molecules of 3-phosphoglycerate. It is a fundamental activity for many autotrophic systems. In the presence of molecular oxygen, the enzyme oxygenates RuBP, yielding a molecule of 3-phosphoglycerate and one of phosphoglycolate (representing a loss of carbon). Rubisco is an old enzyme with a wide phylogenetic distribution among bacteria and archaea. It has been also involved in other, non-autotrophic metabolic functions like a more efficient use of carbohydrates to synthesize lipids in developing plant embryos. Its enigmatic presence also in non-autotrophic species opens the range of its metabolic functions.

See Also

Keywords

Carbon Dioxide Bioorganic Chemistry Molecular Oxygen Metabolic Function Phylogenetic Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Institut Cavanilles de Biodiversitat i Biologia EvolutivaUniversitat de ValènciaValènciaSpain