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Overview

Uniprot IDA0A4X1SHF6
Protein NamePorphobilinogen deaminase
Gene NameHMBS
OrganismSus scrofa

Kla Sites from experimental identification

Position Flanking peptide
52 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 MSGNGNAAAT 20 ALARIQTDSV 30 VATLKALYPG 40 LQFEIIAMST 50 TGDKILDTAL 60 SKIGEKSLFT 70 KELEHALERN 80 EVDLVVHSLK 90 DLPTVLPPGF 100 TIGAVCKREC 110 PYDAVVFHPK 120 FVGKTLETLP 130 EKSVVGTSSL 140 RRAAQLQRKF 150 PHLEFKSIRG 160 NLNTRLRKLD 170 ELQEFSAIIL 180 AAAGLQRMGW 190 QNRVGQGALG 200 VEVRAKDQDI 210 LDLVGVLHDP 220 ETLLRCIAER 230 AFLRHLEGGC 240 SVPVAVHTAM 250 KDGQLYLTGG 260 VWSLNGAESM 270 QETMQATIHV 280 PAQHEDGPED 290 DPQLVGITAR 300 NIPREAQLAA 310 ENLGISLATL 320 LLNKGAKNIL 330 DVARQLNDAH

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.