Porphobilinogen Deaminase

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Porphobilinogen deaminase (361 aa, ~39 kDa) is encoded by the human HMBS gene. This protein plays a role in the polymerization of four molecules of porphobilinogen to yield hydroxymethylbilane.

**Synonyms:** - EC 2.5.1.61 - HMBS - Hydroxymethylbilane Synthase - PBG-D - Pre-Uroporphyrinogen Synthase