7,8-二氢-L-生物蝶呤是四氢生物蝶呤的氧化产物。
靶点Human 内源代谢物
用途
7,8-二氢-L-生物蝶呤是四氢生物蝶呤的氧化产物,是一种天然存在的芳香族氨基酸羟化酶辅助因子,参与酪氨酸和神经递质多巴胺及血清素的合成。它也是 GTP 环水解酶 I 的非竞争性抑制剂,Ki 值为 14.4 μM。
We synthesized [3′-3H]-5,6,7,8-tetrahydrobiopterin from [8,5′-3H]guanosine 5′-triphosphate ([8,5′-3H]GTP) using GTP cyclohydrolase (EC 3.5.4.16), 6-pyruvoyltetrahydropterin synthase and sepiapterin reductase (EC 1.1.1.153). After purification by cation-exchange h.p.l.c. a solution of radiochemically pure (> 95%) [3′-3H]-5,6,7,8-tetrahydrobiopterin with a specific activity of 9.2 Ci/mmol was obtained. The product proved well suited for studying the binding of tetrahydrobiopterin to nitric-oxide synthase.