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Pterin coenzymes

Pterin-6-cafboxylic acid, 3,8-dimethyl-rearrangements, 3, 309 Pterincarboxylic acids occurence, 3, 323 Pterin-6-carboxylic acids acidity, 3, 277 methylation, 3, 297 synthesis, 3, 295, 304 Pterin-7-carboxylic acids acidity, 3, 277 methylation, 3, 297 synthesis, 3, 295 Pterin coenzymes biochemical pathways, 1, 260-263 Pterin-6,7-dicarboxylic acid decarboxylation, 3, 304 reactions, 3, 304... [Pg.756]

Pterin coenzymes such as folic acid (pteroylglutamic acid) and biopterin, which contain a dicyclic pteridine ring, a part of the skeleton of flavins, are also known to play versatile roles in biological redox reactions [67]. The oxidizing ability of the excited state of a pteridine derivative (lumazine [Lu])... [Pg.121]

Figure 10.1 also shows the structures of the folate antagonist methotrexate (iV -methyl aminopterin) and the pterin coenzymes tetrahydrobiopterin (Section 10.4) and molybdopterin (Section 10.5). [Pg.271]

NADH exhibits a lower and higher V ,ax for the reductase than NADPH. Thus, the pterin coenzyme functions stoichiometrically (in the hydroxylase reaction) and catalytically (in the reductase reaction). Deficiency of dihydropteridine reductase causes a substantial decrease in the rate of phenylalanine hy-droxylation. Dihydropteridine reductase and tetrahydrobiopterin are involved in hydroxylation of tyrosine and of tryptophan to yield neurotransmitters and hormones (dopamine, norepinephrine, epinephrine, and serotonin). Unlike phenylalanine hydroxylase, dihydropteridine... [Pg.357]

D. Carriers of Single-Carbon Compounds, and Other Roles of Pterin Coenzymes... [Pg.216]

See other pages where Pterin coenzymes is mentioned: [Pg.627]    [Pg.280]    [Pg.247]    [Pg.260]    [Pg.764]    [Pg.802]    [Pg.803]    [Pg.805]    [Pg.807]    [Pg.809]    [Pg.811]    [Pg.1340]    [Pg.627]    [Pg.247]    [Pg.260]    [Pg.764]    [Pg.802]    [Pg.803]    [Pg.805]    [Pg.807]    [Pg.809]    [Pg.811]    [Pg.627]    [Pg.627]    [Pg.427]    [Pg.406]    [Pg.217]   
See also in sourсe #XX -- [ Pg.802 , Pg.803 , Pg.804 , Pg.805 , Pg.806 , Pg.807 , Pg.808 , Pg.809 , Pg.810 , Pg.811 , Pg.812 , Pg.1061 , Pg.1062 , Pg.1071 , Pg.1072 ]

See also in sourсe #XX -- [ Pg.802 , Pg.803 , Pg.804 , Pg.805 , Pg.806 , Pg.807 , Pg.808 , Pg.809 , Pg.810 , Pg.811 , Pg.812 ]

See also in sourсe #XX -- [ Pg.802 , Pg.803 , Pg.804 , Pg.805 , Pg.806 , Pg.807 , Pg.808 , Pg.809 , Pg.810 , Pg.811 , Pg.812 , Pg.1061 , Pg.1062 ]

See also in sourсe #XX -- [ Pg.802 , Pg.803 , Pg.804 , Pg.805 , Pg.806 , Pg.807 , Pg.808 , Pg.809 , Pg.810 , Pg.811 , Pg.812 ]



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Pterin

Pterins

Tetrahydrofolic Acid and Other Pterin Coenzymes

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