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Overview

Uniprot IDA0A8W4FLX8
Protein NamePorphobilinogen deaminase
Gene NameHMBS
OrganismSus scrofa

Kla Sites from experimental identification

Position Flanking peptide
62 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 FLQEENSPKM 20 RVIRVGTRKS 30 QLARIQTDSV 40 VATLKALYPG 50 LQFEIIAMST 60 TGDKILDTAL 70 SKIGEKSLFT 80 KELEHALERN 90 EVDLVVHSLK 100 DLPTVLPPGF 110 TIGAVCKREC 120 PYDAVVFHPK 130 FVGKTLETLP 140 EKSVVGTSSL 150 RRAAQLQRKF 160 PHLEFKSIRG 170 NLNTRLRKLD 180 ELQEFSAIIL 190 AAAGLQRMGW 200 QNRVGQILHP 210 EECMYAVGQG 220 ALGVEVRAKD 230 QDILDLVGVL 240 HDPETLLRCI 250 AERAFLRHLE 260 GGCSVPVAVH 270 TAMKDGQLYL 280 TGGVWSLNGA 290 ESMQETMQAT 300 IHVPAQHEDG 310 PEDDPQLVGI 320 TARNIPREAQ 330 LAAENLGISL 340 ATLLLNKGAK 350 NILDVARQLN DAH

Gene Ontology

Classification GO ID Description
Cellular Component GO:0005829 cytosol
Biological Process GO:0006783 heme biosynthetic process
Molecular Function GO:0004418 hydroxymethylbilane synthase activity

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.