Abstract
Soon after the isolation of 7,8-dihydrobiopterin from rat liver,1 the structure of the naturally occurring cofactor of hydroxylases 5,6,7,8-tetrahydrobiopterin (BH4) was established. Unequivocal proof of the biosynthesis of its precursors quinonoid-D-erythrodihydroneopterin triphosphate and quinonoid-L-erythrodihydrobiopterin from GTP was documented in a series of reports.2,3,4,5 Significant to the understanding of the formation of BH4 was the characterization of an enzyme, quinonoid dihydrobiopterin reductase (DHPR) (EC1.6.99.7) which catalyzes the reduction of quinonoid-L- erythrodihydrobiopterin (q-BH2) in presence of NADH2 or NADPH2.6,7 The coupled oxido-reductive reaction q-BH2+2H++2e−⇌BH4+O2+substrate → product +H2O enables the fast shuttle of 2H++2e−.
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© 1981 Plenum Press, New York
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Gál, E.M. (1981). Synthesis and Quantitative Aspects of Dihydrobiopterin Control of Cerebral Serotonin Levels. In: Haber, B., Gabay, S., Issidorides, M.R., Alivisatos, S.G.A. (eds) Serotonin. Advances in Experimental Medicine and Biology, vol 133. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3860-4_10
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DOI: https://doi.org/10.1007/978-1-4684-3860-4_10
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