... is an aromatic organic compound composed of fused pyrimidine and pyrazine rings. Pteridines also constitute a group ... Pterins and flavins are classes of substituted pteridines that have diverse biological roles. Dihydrobiopterin Pyrazine ... Pteridines, All stub articles, Heterocyclic compound stubs). ...
In enzymology, a pteridine oxidase (EC 1.17.3.1) is an enzyme that catalyzes the chemical reaction 2-amino-4-hydroxypteridine ... "Detection of a pteridine oxidase in plants". Plant Sci. Lett. 18: 169-175. doi:10.1016/0304-4211(80)90047-4. Portal: Biology v ...
"The roles of pteridine reductase 1 and dihydrofolate reductase-thymidylate synthase in pteridine metabolism in the protozoan ... In enzymology, a pteridine reductase (EC 1.5.1.33) is an enzyme that catalyzes the chemical reaction 5,6,7,8- ... Other names in common use include PTR1, and pteridine reductase 1. As of late 2007, 7 structures have been solved for this ... Gourley DG, Schüttelkopf AW, Leonard GA, Luba J, Hardy LW, Beverley SM, Hunter WN (2001). "Pteridine reductase mechanism ...
Cyanopterin is a glycosylated version of pteridine of unknown function in cyanobacteria. Folic acid Molybdopterin Pteridine ... The pteridine ring system contains four nitrogen atoms, reducing its aromaticity to the point that it can be attacked by ... Pterin is a heterocyclic compound composed of a pteridine ring system, with a "keto group" (a lactam) and an amino group on ... Folates are pterins that contain p-aminobenzoic acid connected to the methyl group at position 6 of the pteridine ring system ( ...
doi:10.1515/pteridines.1993.4.1.1. S2CID 53485331. Nar H, Huber R, Heizmann CW, Thöny B, Bürgisser D (March 1994). "Three- ... Blaui N, Thony B, Heizmanni CW, Dhondt J (1993). "Tetrahydrobiopterin Deficiency: From Phenotype to Genotype". Pteridines. 4: 1 ...
Feirer, Nathan; Fuqua, Clay (1 May 2017). "Pterin function in bacteria" (PDF). Pteridines. 28 (1): 23-36. doi:10.1515/pterid- ...
Pteridines. 4 (1): 1-10. doi:10.1515/pteridines.1993.4.1.1. S2CID 53485331. Tsui LC, Buchwald M, Barker D, Braman JC, Knowlton ...
In pteridine biosynthesis pathway, Catsup negatively regulates the activity of GTP Cyclohydrolase I (GTPCH), preventing GTPCH ... Catsup regulates production of dopamine by serving as a negative regulator of rate-limiting enzymes in dopamine and pteridine ... O'Donnell, Janis M.; Stathakis, Dean G.; Burton, Denise; Chen, Zuomin (2002). Chemistry and Biology of Pteridines and Folates. ...
... including derivatives of pteridines, and belongs to a group of enzymes called aldo-keto reductases. SPR plays an important role ... Chemistry and Biology of Pteridines and Folates. Advances in Experimental Medicine and Biology. Vol. 338. pp. 195-8. doi: ...
Rembold H, Simmersbach F (1969). "Catabolism of pteridine cofactors. II. A specific pterin deaminase in rat liver". Biochim. ...
Rembold H, Simmersbach F (1969). "Catabolism of pteridine cofactors. II. A specific pterin deaminase in rat liver". Biochim. ...
Brown, D. J. (2009). The Chemistry of Heterocyclic Compounds, Fused Pyrimidines: Pteridines. John Wiley & Sons. p. 89. ISBN ...
... belongs to the chemical group known as pteridines. It is synthesised by human macrophages upon stimulation with the ... Neopterin is an organic compound belonging to the pteridine class of heterocyclic compounds. ... Pteridines, Triols, All stub articles, Biochemistry stubs). ...
Oliphant LW (1987). "Pteridines and purines as major pigments of the avian iris". Pigment Cell Res. 1 (2): 129-31. doi:10.1111/ ... The bright yellow eyes of the great horned owl are thought to be due to the presence of the pteridine pigment xanthopterin ... The brightly colored eyes of many bird species result from the presence of other pigments, such as pteridines, purines, and ... Oliphant LW (1981). "Crystalline pteridines in the stromal pigment cells of the iris of the great horned owl". Cell Tissue Res ...
However, vesicles containing pteridine and carotenoids are sometimes found in the same cell, in which case the overall colour ... This was subsequently identified as pterorhodin, a pteridine dimer that accumulates around eumelanin core, and it is also ... Most chromatophores can generate pteridines from guanosine triphosphate, but xanthophores appear to have supplemental ... such as carotenoids and pteridines. These pigments selectively absorb parts of the visible light spectrum that makes up white ...
Hawkins ME (2001). "Fluorescent pteridine nucleoside analogs: a window on DNA interactions". Cell Biochemistry and Biophysics. ...
Colouration is mainly created by carotenoids and pteridine pigments; lizards with red and orange frills have more carotenoids ... than those with yellow and white frills, the latter two are also lacking in pteridines. Yellow colouration has been linked to ...
Armarego WL, Ohnishi A, Taguchi H (1986). "New pteridine substrates for dihydropteridine reductase and horseradish peroxidase ...
... is a pteridine pigment found in animals and plants. It has been extracted in melanosomes of tree frogs, butterflies ... Pteridines, All stub articles, Heterocyclic compound stubs). ...
The first type is the erythrophores, which contains reddish pigments such as carotenoids and pteridines. The second type is the ...
Pteridine Pterin Deazaflavin (5-deazaflavin) Michaelis L, Schubert MP, Smythe CV (1936). "Potentiometric study of the flavins ...
1991). "Biochemistry and function of pteridine synthesis in human and murine macrophages". Pathobiology. 59 (4): 276-9. doi: ...
The pteridine derivative folic acid is assigned to the vitamin B complex; ethyl cyanoacetate and guanidine can be used as ...
Then the age of the flies can be specifically determined, using technique such as pteridine fluorescence, and this helps to ... using pteridine fluorescence". Med Vet Entomol. 27 (1): 59-63. doi:10.1111/j.1365-2915.2012.01021.x. PMID 22845466. Cook ...
This enzyme was first described in 1964 as a pteridine-dependent ether lipid cleaving enzyme. In 2010 finally, the gene coding ... Tietz, AA; Lindberg, M; Kennedy, EP (December 1964). "A New Pteridine-Requiring Enzyme System For The Oxidation Of Glyceryl ...
Within this categorization, xanthophores are cells that contain primarily yellowish pteridines, while erythrophores contain ...
Oxenkrug, Gregory F. (January 2011). "Interferon-gamma-inducible kynurenines/pteridines inflammation cascade: implications for ...
Chemically, its structure is that of a (dihydropteridine reductase) reduced pteridine derivative (quinonoid dihydrobiopterin).[ ...
One-carbon units in a variety of oxidation states may be attached to the N5 nitrogen atom of the pteridine ring and/or the N10 ... A pterin (2-amino-4-hydroxy-pteridine) heterocyclic ring is linked by a methylene bridge to a p-aminobenzoyl group that in turn ... Mechanistically, hydride is transferred from NADPH to the C6 position of the pteridine ring. A one-carbon (1C) methyl group is ...
... a novel microbial inhibitor for phenylalanine hydroxylase and other pteridine-dependent monooxygenases". Biochimica et ...