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MOLECULAR ASPECTS OF ASCORBATE PEROXIDASE ISOZYMES
MOLECULAR ASPECTS OF ASCORBATE PEROXIDASE ISOZYMESopenaire
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Ascorbate peroxidase–thioredoxin interaction
Photosynthesis Research, 2006Proteomics data have suggested ascorbate peroxidase (APX) to be a potential thioredoxin-interacting protein. Using recombinant enzymes, we observed that incubation of pea cytosolic APX with reduced poplar thioredoxins h drastically inactivated the peroxidase.
Gelhaye, Éric +5 more
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Crystal structure of the ascorbate peroxidase–ascorbate complex
Nature Structural & Molecular Biology, 2003Heme peroxidases catalyze the H2O2-dependent oxidation of a variety of substrates, most of which are organic. Mechanistically, these enzymes are well characterized: they share a common catalytic cycle that involves formation of a two-electron, oxidized Compound I intermediate followed by two single-electron reduction steps by substrate.
Sharp, K.H. +3 more
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Common phylogeny of catalase-peroxidases and ascorbate peroxidases
Gene, 2000Catalase-peroxidases belong to Class I of the plant, fungal, bacterial peroxidase superfamily, together with yeast cytochrome c peroxidase and ascorbate peroxidases. Obviously these bifunctional enzymes arose via gene duplication of an ancestral hydroperoxidase. A 230-residues long homologous region exists in all eukaryotic members of Class I, which is
M, Zámocký, S, Janecek, F, Koller
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The Redox Properties of Ascorbate Peroxidase
Biochemistry, 2007Reduction potentials for the catalytic compound I/compound II and compound II/Fe3+ redox couples, and for the two-electron compound I/Fe3+ redox couple, have been determined for ascorbate peroxidase (APX) and for a number of site-directed variants.
Efimov, I +7 more
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Class I Heme Peroxidases: Characterization of Soybean Ascorbate Peroxidase
Archives of Biochemistry and Biophysics, 1998An efficient expression system [D. A. Dalton et al. Arch. Biochem. Biophys. 328, 1-8, 1996) for soybean nodule ascorbate peroxidase (APX) has, for the first time, been used to generate enzyme in large enough quantities for detailed biophysical analysis. The recombinant APX has been characterized by electronic absorption, EPR, NMR and circular dichroism
Jones, DK +3 more
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Catalase-Peroxidases in Cyanobacteria – Similarities and Differences to Ascorbate Peroxidases
Free Radical Research, 1999Cyanobacteria (blue-green algae) are oxygenic phototrophic bacteria carrying out plant-type photosynthesis. The only hydrogen peroxide scavenging enzymes in at least two unicellular species have been demonstrated to be bifunctional cytosolic catalase-peroxidases (CatPXs) having considerable homology at the active site with plant ascorbate peroxidases ...
C, Obinger +6 more
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Cytosolic ascorbate peroxidase in Gymnosperms
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 2000ABSTRACT Sixteen species of Gymnosperms have been screened for cytosolic ascorbate peroxidase by means of native polyacrylamide gel electrophoresis. This analysis shows that a single form of the enzyme is the most common situation. The enzyme reveals a similar electrophoretic mobility in species belonging to the same genus and sometimes to different ...
TOMMASI, Franca, PACIOLLA, Costantino
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Ascorbate Peroxidase in Malted Barley
Journal of the American Society of Brewing Chemists, 2013An ascorbate peroxidase has been identified in the acrospire and aleurone of germinating barley. Its synthesis is triggered in the aleurone by the presence of ascorbic acid and hydrogen peroxide.
Makoto Kanauchi, Charles W. Bamforth
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