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Oxidoreductases in plant plasma membranes
Biochimica et Biophysica Acta (BBA) - Reviews on Biomembranes, 1997Electron transporting oxidoreductases at biological membranes mediate several physiological processes. While such activities are well known and widely accepted as physiologically significant for other biological membranes, oxidoreductase activities found at the plasma membrane of plants are still being neglected.
Sabine Lüthje +4 more
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Pentitol oxidoreductases inSclerotinia sclerotiorum
Archiv f�r Mikrobiologie, 1973Pentitol: NADP and pentitol: NAD oxidoreductase were detected in cell-free extracts of mycelia and sclerotia ofSclerotinia sclerotiorum (Lib.) D By. grown on synthetic liquid medium containingd-xtlose,l-arabinose ord-ribose. Both enzymes were similar to those reported from other fungi. The enzymes were not detected when the fungus was grown on a medium
Sy-Ying C. Wang, Duane Le Tourneau
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Protein disulphide oxidoreductases in bacteria
Trends in Biochemical Sciences, 1994Thioredoxins and eukaryotic protein disulphide isomerases were, until recently, the only enzymes known to catalyse reversible oxidation and reduction of cysteine residues of a wide spectrum of protein substrates. Genetic and biochemical investigations on different bacterial systems have now led to the discovery of novel prokaryotic protein disulphide ...
Hannes Loferer, Hauke Hennecke
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Oxidoreductases and Oxygenases
1984Oxidoreductases (dehydrogenases or oxidases) catalyze the addition or the removal of hydrogen or electrons. Oxygenases bring about the incorporation of oxygen which originates from molecular oxygen.
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Bacterial NADH-quinone oxidoreductases
Journal of Bioenergetics and Biomembranes, 1991The NADH-quinone oxidoreductases of the bacterial respiratory chain could be divided in two groups depending on whether they bear an energy-coupling site. Those enzymes that bear the coupling site are designated as NADH dehydrogenase 1 (NDH-1) and those that do not as NADH dehydrogenase 2 (NDH-2).
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Physiological Roles of Xanthine Oxidoreductase
Drug Metabolism Reviews, 2004Xanthine oxidoreductase (XOR) is a major protein component of the milk fat globule membrane (MFGM) surrounding fat droplets in milk and its enzymology is well characterised. The enzyme is widely distributed in mammalian tissues and is generally accepted to be a key enzyme of purine catabolism.
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Glycolate oxidoreductase in Escherichia coli
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972Abstract Escherichia coli cells growing on glycolate as a sole source of carbon synthesise an enzyme which catalyses the oxidation of this compound to glyoxylate. The formation of glyoxylate from glycolate by extracts of such cells is dependent upon the presence of the artificial electron acceptors phenazine methosulphate and 2,6 ...
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Pyridine Nucleotide — Disulfide Oxidoreductases
1980Electron transfer between pyridine nucleotides and disulfide compounds is catalyzed by three flavoproteins which are well characterized. Lipoamide dehydrogenase reoxidizes reduced lipoamide (lip-(SH)2) by NAD+. Glutathione reductase catalyzes reduction of glutathione (GSSG) by NADPH. Thioredoxin reductase catalyzes the reduction of oxidized thioredoxin
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Quinone Oxidoreductases of the Plasma Membrane
2004Publisher Summary Quinone oxidoreductases of the plasma membrane relate functionally to the operation of a cell surface redox chain, where cytosolic NAD(P)H is oxidized. Plasma membrane quinones serve as lipid-soluble transmembrane shuttles to transfer the 2H+ + 2e- from NAD(P)H to 1/2 O2 to form water.
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