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Query: UNIPROT:P04040 (Catalase)
 3,577 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cell-free extracts prepared from spherical and rod-shaped cells of Arthrobacter crystallopoietes were assayed for enzymes during various periods of starvation. The level of NADH oxidase dropped to 20 and 30%, respectively, in spherical and rod-shaped cells during the first 1 to 2 days of starvation and then remained constant for 9 days. Catalase activity decreased continuously and reached a low level in 9 days. Enzymes involved in glucose metabolism and the tricarboxylic acid cycle were stable for the duration of the experiment (about 1 week). Succinic dehydrogenase, fumarase and aconitase were stable during 21 days of starvation, which is the longest time enzymes have been shown to be stable in any bacterium under conditions of total starvation.
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PMID:Stability of enzymes in starving Arthrobacter crystallopoietes. 18 Feb 37

The involvement of catalase (H2O2:H2O2 oxidoreductase, EC 1.11.1.6) in the metabolism of alcohols was investigated by comparing Drosophila melanogaster larvae in which catalase was inhibited by dietary 3-amino-1,2,4-triazole (3AT) to larvae fed a diet without 3AT. 3AT inhibited up to 80% of the catalase activity with concordant small increases in the in vitro activities of sn-glycerol-3-phosphate dehydrogenase, fumarase, and malic enzyme, but with a 16% reduction in the in vivo incorporation of label from [14C]glucose into lipid. When the catalase activity was inhibited to different degrees in ADH-null larvae, there was a simple linear correlation between the catalase activity and flux from [14C]ethanol into lipid. By feeding alcohols simultaneously with 3AT, ethanol and methanol were shown to react efficiently with catalase in wild-type larvae at moderately low dietary concentrations. Drosophila catalase did not react with other longer chain alcohols. Catalase apparently represents a minor pathway for ethanol degradation in D. melanogaster larvae, but it may be an important route for methanol elimination from D. melanogaster larvae.
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PMID:The involvement of catalase in alcohol metabolism in Drosophila melanogaster larvae. 191 Feb 97

Catalase, glycolate oxidase, and hydroxypyruvate reductase, enzymes which are located in the microbodies of leaves, show different developmental patterns in the shoots of wheat seedlings. Catalase and hydroxypyruvate reductase are already present in the shoots of ungerminated seeds. Glycolate oxidase appears later. All three enzymes develop in the dark, but glycolate oxidase and hydroxypyruvate reductase have only low activities. On exposure of the seedlings to continuous white light (14.8 x 10(3) ergs cm(-2) sec(-1)), the activity of catalase is doubled, and glycolate oxidase and hydroxypyruvate reductase activities increase by 4- to 7-fold. Under a higher light intensity, the activities of all three enzymes are considerably further increased. The activities of other enzymes (cytochrome oxidase, fumarase, glucose-6-phosphate dehydrogenase) are unchanged or only slightly influenced by light. After transfer of etiolated seedlings to white light, the induced increase of total catalase activity shows a much longer lag-phase than that of glycolate oxidase and hydroxypyruvate reductase. It is concluded that the light-induced increases of the microbody enzymes are due to enzyme synthesis. The light effect on the microbody enzymes is independent of chlorophyll formation or the concomitant development of functional chloroplasts. Short repeated light exposures which do not lead to greening are very effective. High activities of glycolate oxidase and hydroxypyruvate reductase develop in the presence of 3-amino-1,2,4-triazole which blocks chloroplast development. The effect of light is not exerted through induced glycolate formation and appears instead to be photomorphogenetic in character.In senescing leaves excised from the plants decreases in activity of glycolate oxidase, and hydroxypyruvate reductase follow with some delay the decrease in chlorophyll content. The activity of catalase, however, is maintained at high levels, especially when the detached shoots are kept in light.
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PMID:Developmental studies on microbodies in wheat leaves : I. Conditions influencing enzyme development. 1665 92