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DraconiticBiochemistryBiomolecules · Catabolism · Biosynthesis · MetabolismMap
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4 PBGs bind to form HMB

4 PBG + H2O → HMBL + 4 NH4+

Reactome
R-HSA-189406
Compartment
cytosol
Rhea
RHEA:13186

Inputs

Outputs

Catalysed by

  • hydroxymethylbilane synthase activity of HMBS:DIPY [cytosol]EC 2.5.1.61

Literature

  1. Human porphobilinogen deaminase mutations in the investigation of the mechanism of dipyrromethane cofactor assembly and tetrapyrrole formation Biochem Soc Trans, 2003
  2. Purification and properties of uroporphyrinogen I synthase from human erythrocytes. Identification of stable enzyme-substrate intermediates. J Biol Chem, 1980