Amiloride-sensitive amine oxidase [copper-containing]
Aldehyde dehydrogenase, dimeric NADP-preferring
1-Methylhistamine + Oxygen + Water → Ammonia + Hydrogen peroxide + Methylimidazole acetaldehyde
Probable histidine--tRNA ligase, mitochondrial
Adenosine triphosphate + L-Histidine + tRNA(His) → Adenosine monophosphate + L-Histidyl-tRNA(His) + Pyrophosphate
L-Histidine ↔ Ammonia + Urocanic acid
L-Histidine + S-Adenosylmethionine → 3-Methylhistidine + S-Adenosylhomocysteine
Carnosine + Water → L-Histidine + β-Alanine
Histamine + Oxygen + Water → Ammonia + Hydrogen peroxide + Imidazole-4-acetaldehyde
Formiminoglutamic acid + Tetrahydrofolic acid ↔ 5-Formiminotetrahydrofolic acid + L-Glutamic acid
4-Imidazolone-5-propionic acid ↔ Urocanic acid + Water
Methylimidazole acetaldehyde + NADP + Water → Hydrogen Ion + Methylimidazoleacetic acid + NADPH
Imidazole-4-acetaldehyde + NAD + Water → Hydrogen Ion + Imidazoleacetic acid + NADH
Histamine + S-Adenosylmethionine → 1-Methylhistamine + S-Adenosylhomocysteine
Adenosine triphosphate + L-Histidine + β-Alanine → Adenosine diphosphate + Carnosine + Phosphate
Carnosine + S-Adenosylmethionine → Anserine + S-Adenosylhomocysteine
1-Methylhistidine + Adenosine triphosphate + β-Alanine → Adenosine diphosphate + Anserine + Phosphate
Anserine + Water → 1-Methylhistidine + β-Alanine
4-Imidazolone-5-propionic acid + Water → Formiminoglutamic acid
L-Histidine → Carbon dioxide + Histamine