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Overview

Uniprot IDF6Q2D2
Protein NamePorphobilinogen deaminase
Gene NameHMBS
OrganismSus scrofa

Kla Sites from experimental identification

Position Flanking peptide
64 ILDTALSKIGEKSLF

Function

As part of the heme biosynthetic pathway, catalyzes the sequential polymerization of four molecules of porphobilinogen to form hydroxymethylbilane, also known as preuroporphyrinogen. Catalysis begins with the assembly of the dipyrromethane cofactor by the apoenzyme from two molecules of porphobilinogen or from preuroporphyrinogen. The covalently linked cofactor acts as a primer, around which the tetrapyrrole product is assembled. In the last step of catalysis, the product, preuroporphyrinogen, is released, leaving the cofactor bound to the holodeaminase intact

Protein Sequence

10 MGFHQEENSP 20 KMRVIRVGTR 30 KSQLARIQTD 40 SVVATLKALY 50 PGLQFEIIAM 60 STTGDKILDT 70 ALSKIGEKSL 80 FTKELEHALE 90 RNEVDLVVHS 100 LKDLPTVLPP 110 GFTIGAVCKR 120 ECPYDAVVFH 130 PKFVGKTLET 140 LPEKSVVGTS 150 SLRRAAQLQR 160 KFPHLEFKSI 170 RGNLNTRLRK 180 LDELQEFSAI 190 ILAAAGLQRM 200 GWQNRVGQIL 210 HPEECMYAVG 220 QGALGVEVRA 230 KDQDILDLVG 240 VLHDPETLLR 250 CIAERAFLRH 260 LEGGCSVPVA 270 VHTAMKDGQL 280 YLTGGVWSLN 290 GAESMQETMQ 300 ATIHVPAQHE 310 DGPEDDPQLV 320 GITARNIPRE 330 AQLAAENLGI 340 SLATLLLNKG 350 AKNILDVARQ LNDAH

Gene Ontology

Classification GO ID Description
Cellular Component GO:0005829 cytosol
Molecular Function GO:0004418 hydroxymethylbilane synthase activity
Biological Process GO:0006782 protoporphyrinogen IX biosynthetic process

Reference

[1] Fan S, Zhou R, Wen H, Ye H, Ma S et al.. Global profiling of protein lactylome in porcine granulosa cells.. J Ovarian Res 18(1):177. 2025 Aug 8. PMID: 40781717.