6-pyruvoyl-5,6,7,8-tetrahydropterin

1. 7,8-dihydroneopterin 3'-triphosphate = 6-pyruvoyl-5,6,7,8-tetrahydropterin + triphosphate + H(+)

Catalysed by PTS

1. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + 2 NADP(+) = 6-pyruvoyl-5,6,7,8-tetrahydropterin + 2 NADPH + 2 H(+)

Catalysed by SPR

1. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + 2 NADP(+) = 6-pyruvoyl-5,6,7,8-tetrahydropterin + 2 NADPH + 2 H(+)
2. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin

Catalysed by SPR, TPH1, TPH2One of 3 routes

1. 7,8-dihydroneopterin 3'-triphosphate = 6-pyruvoyl-5,6,7,8-tetrahydropterin + triphosphate + H(+)
2. alkaline phosphatase, biomineralization associated

Catalysed by PTS, ALPLextracellular spaceOne of 2 routes

1. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + 2 NADP(+) = 6-pyruvoyl-5,6,7,8-tetrahydropterin + 2 NADPH + 2 H(+)
2. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(out) + a dicarboxylate(in) = (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(in) + a dicarboxylate(out)
3. indoxyl sulfate(out) + a dicarboxylate(in) = indoxyl sulfate(in) + a dicarboxylate(out)

Catalysed by SPR, SLC22A6, SLC22A8inner side of the membrane, outer side of the membraneOne of 2 routes

1. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + 2 NADP(+) = 6-pyruvoyl-5,6,7,8-tetrahydropterin + 2 NADPH + 2 H(+)
2. (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(out) + a dicarboxylate(in) = (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(in) + a dicarboxylate(out)
3. a dicarboxylate(in) + sulfate(out) = a dicarboxylate(out) + sulfate(in)