Results 21 to 30 of about 4,377 (174)
Journal of Biological Chemistry, 1972 Abstract Qualitative and quantitative analyses for pterins (derivatives of 2-amino-4-hydroxypteridine) in human urine were carried out by an improved procedure which involved the use of two new weak ion exchangers, ECTEOLA-Sephadex and phospho-Sephadex.
T, Fukushima, T, Shiota
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Journal of Biological Chemistry, 1959 Publisher Summary This chapter describes the bacterial pterin deaminase. In the standard assay, the mixture contains 0.05 ml of pterin carboxylic acid, 0.8 ml of phosphate buffer, and 0.02 to 0.15 ml of enzyme in a final volume of 1.0 ml. Incubation is carried out at 23° in a 1-ml Beckman quartz cuvette with a light path of 1.00 cm. Reaction is begun
B, LEVENBERG, O, HAYAISHI
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Direct coordination of pterin to Fe II enables neurotransmitter biosynthesis in the pterin-dependent hydroxylases [PDF]
Proceedings of the National Academy of Sciences, 2021 Significance The mononuclear pterin-dependent nonheme iron enzymes catalyze the rate-limiting step in neurotransmitter biosynthesis and are essential in maintaining proper brain function. These enzymes utilize molecular oxygen, a redox active pterin cofactor, and a ferrous active site to generate an Fe
Shyam R. Iyer +13 more
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Angewandte Chemie, EarlyView.This review highlights an emerging anticancer approach integrating platinum agents into photodynamic therapy (PDT) and photoactivated chemotherapy (PACT) systems, further augmented by cancer cell membrane‐ and organelle‐targeting. By directing photoactivated platinum complexes from nontargeted distribution to cancer cells or defined subcellular sites ...
Shu Chen +3 more
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Acta Crystallographica Section E, 2013 The NiII atom in the title complex, [Ni(C8H5N5O3)(C2H8N2)(H2O)]·2H2O, is six-coordinated in a distorted octahedral geometry by a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate (pterin) ligand, a bidentate ancillary ethane-1,2-diamine (en)
Siddhartha S. Baisya, Parag S. Roy
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Pteridines, 2018 A concise account of pterins in chemistry and biology and their applications in molecular sensors including their optical spectroscopic properties are described.
Goswami Shyamaprosad +3 more
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Inhibitory Effects of Pteridines on the Cytochrome P-450 Enzyme System
Pteridines, 1997 The effects of 17 different pteridine derivatives on rat liver microsomal cytochrome P-450 catalyzed degradation of aminoantipyrin were studied.
Horejsi Renate +5 more
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Molecular architecture of pterin deaminase from Saccharomyces cerevisiae NCIM 3458
Pteridines, 2017 As early as 1974, reports have confirmed the anticancer activity of pterin deaminase isolated from fungi. The enzyme has also been reported in bacteria, fungi and slime mold genera, but the enzyme characterization was effetely done.
Murugesan Thandeeswaran +7 more
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Tryptophan oxidation photosensitized by pterin
Free Radical Biology and Medicine, 2013 Pterins are normal components of cells and they have been previously identified as good photosensitizers under UV-A irradiation, inducing DNA damage and oxidation of nucleotides. In this work, we have investigated the ability of pterin (Ptr), the parent compound of oxidized pterins, to photosensitize the oxidation of another class of biomolecules ...
Thomas, Andrés Héctor +6 more
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Immunopterin: A prospective therapy and preventative to fight COVID-19?
Pteridines, 2022 The authors explore the therapeutic and prophylactic efficacies of Immunopterin (calcium pterin-6-carboxylate chelate) against coronavirus colds and as a therapy against COVID-19.
Moheno Phillip B. B., Fuchs Dietmar
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