RubisCO Early Oxygenase Activity: A Kinetic and Evolutionary Perspective
| Autor: | Jerzy Kruk, Halina Ślesak, Ireneusz Ślesak |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
0106 biological sciences 0301 basic medicine Oxygenase aerobes Ribulose-Bisphosphate Carboxylase Biology Photosynthesis 01 natural sciences origin of life General Biochemistry Genetics and Molecular Biology Evolution Molecular 03 medical and health sciences Botany Autotroph reactive oxygen species heterotrophy Bacteria Atmosphere fungi RuBisCO Carbon fixation food and beverages Eukaryota anaerobes Oxygenase activity Plants Archaea Pyruvate carboxylase Oxygen Kinetics 030104 developmental biology Biochemistry Carboxylation autotrophy biology.protein 010606 plant biology & botany |
| Zdroj: | BioEssays : news and reviews in molecular, cellular and developmental biology. 39(11) |
| ISSN: | 1521-1878 |
| Popis: | RubisCO (D-ribulose 1,5-bisphosphate carboxylase/oxygenase) is Earth's main enzyme responsible for CO2 fixation via carboxylation of ribulose-1,5-bisphosphate (RuBP) into organic matter. Besides the carboxylation reaction, RubisCO also catalyzes the oxygenation of RuBP by O2 , which is probably as old as its carboxylation properties. Based on molecular phylogeny, the occurrence of the reactive oxygen species (ROS)-removing system and kinetic properties of different RubisCO forms, we postulated that RubisCO oxygenase activity appeared in local microoxic areas, yet before the appearance of oxygenic photosynthesis. Here, in reviewing the literature, we present a novel hypothesis: the RubisCO early oxygenase activity hypothesis. This hypothesis may be compared with the exaptation hypothesis, according to which latent RubisCO oxygenase properties emerged later during the oxygenation of the Earth's atmosphere. The reconstruction of ancestral RubisCO forms using ancestral sequence reconstruction (ASR) techniques, as a promising way for testing of RubisCO early oxygenase activity hypothesis, is presented. |
| Databáze: | OpenAIRE |
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