Evolution of Photorespiratory Glycolate Oxidase among Archaeplastida
نویسندگان
چکیده
منابع مشابه
The evolution of photorespiratory glycolate oxidase activity.
The first step of photosynthetic carbon fixation is catalyzed by ribulose-1,5bisphosphate carboxylase/oxygenase, which arose when the atmosphere contained virtually no O2. The increase of atmospheric O2 caused by oxygenic photosynthesis gave rise to photorespiratory metabolism, a process whereby O2 substitutes for CO2, causing ribulose-1,5bisphosphate carboxylase/oxygenase to produce the toxic ...
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The genes coding for the core metabolic enzymes of the photorespiratory pathway that allows plants with C3-type photosynthesis to survive in an oxygen-rich atmosphere, have been largely discovered in genetic screens aimed to isolate mutants that are unviable under ambient air. As an exception, glycolate oxidase (GOX) mutants with a photorespiratory phenotype have not been described yet in C3 sp...
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Photorespiration is essential for all organisms performing oxygenic photosynthesis. The evolution of photorespiratory metabolism began among cyanobacteria and led to a highly compartmented pathway in plants. A molecular understanding of photorespiration in eukaryotic algae, such as glaucophytes, rhodophytes, and chlorophytes, is essential to unravel the evolution of this pathway. However, mecha...
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The g1lycolate oxidase reactioni by x-hich gly colate is oxidized to glyoxylate (3, 10) is catailyzed by a flavoprotein (18) th,at is widely distributed in higher plants (12) and fungi (4). Its presence is g,elleralllly assumed in all phoiosynithetic tissuies, since glycolate is an early product of photosynthesis (14), yet this substrate is tusually found in oiily minute amounits. The oxidation...
متن کاملControl of photorespiratory glycolate metabolism in an oxygen-resistant mutant of Chlorella sorokiniana.
Under a gas atmosphere of 99% O2/1% CO2, wild-type cells of Chlorella sorokiniana excreted 12% of their dry weight as glycolate during photolithotrophic growth, whereas mutant cells excreted glycolate at only 3% of the cellular dry weight. The observed difference in glycolate excretion by the two cell types appears to be due to a different capacity for the metabolism of glycolate, rather than t...
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ژورنال
عنوان ژورنال: Plants
سال: 2020
ISSN: 2223-7747
DOI: 10.3390/plants9010106