(6S)-5-methyl-5,6,7,8-tetrahydrofolate

1. (6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine = (6S)-5,6,7,8-tetrahydrofolate + L-methionine

Catalysed by MTR

1. (6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine = (6S)-5,6,7,8-tetrahydrofolate + L-methionine

Catalysed by MTR

1. 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(in) + (6S)-5-methyl-5,6,7,8-tetrahydrofolate(out) = 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(out) + (6S)-5-methyl-5,6,7,8-tetrahydrofolate(in)

Catalysed by SLC19A1inner side of the membrane, outer side of the membrane

1. (6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine = (6S)-5,6,7,8-tetrahydrofolate + L-methionine
2. N-acetylglutamate synthase (N-acetylmethionine)

Catalysed by MTR, NAGSmitochondrial matrix

1. 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(in) + (6S)-5-methyl-5,6,7,8-tetrahydrofolate(out) = 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(out) + (6S)-5-methyl-5,6,7,8-tetrahydrofolate(in)
2. 2',3'-cGAMP(out) + 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(in) = 2',3'-cGAMP(in) + 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamide(out)

Catalysed by SLC19A1inner side of the membrane, outer side of the membrane

1. (6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine = (6S)-5,6,7,8-tetrahydrofolate + L-methionine
2. transport of methionine and tryptophan (cytosol to extracellular)
3. beta-carboline hydrolysis

Catalysed by MTR, SLC7A5extracellular space, cytosol

1. (6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine = (6S)-5,6,7,8-tetrahydrofolate + L-methionine
2. N-acetylglutamate synthase (N-acetylmethionine)
3. Carnitine O-Palmitoyltransferase

Catalysed by MTR, and 1 more