ID   HEM3_SYNY3              Reviewed;         320 AA.
AC   P73660;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   25-MAY-2022, entry version 137.
DE   RecName: Full=Porphobilinogen deaminase;
DE            Short=PBG;
DE            EC=2.5.1.61;
DE   AltName: Full=Hydroxymethylbilane synthase;
DE            Short=HMBS;
DE   AltName: Full=Pre-uroporphyrinogen synthase;
GN   Name=hemC; OrderedLocusNames=slr1887;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
CC   -!- FUNCTION: Tetrapolymerization of the monopyrrole PBG into the
CC       hydroxymethylbilane pre-uroporphyrinogen in several discrete steps.
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + 4 porphobilinogen = hydroxymethylbilane + 4 NH4(+);
CC         Xref=Rhea:RHEA:13185, ChEBI:CHEBI:15377, ChEBI:CHEBI:28938,
CC         ChEBI:CHEBI:57845, ChEBI:CHEBI:58126; EC=2.5.1.61;
CC   -!- COFACTOR:
CC       Name=dipyrromethane; Xref=ChEBI:CHEBI:60342;
CC       Note=Binds 1 dipyrromethane group covalently.;
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; protoporphyrin-IX
CC       biosynthesis; coproporphyrinogen-III from 5-aminolevulinate: step 2/4.
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC       biosynthesis.
CC   -!- SUBUNIT: Monomer. {ECO:0000250}.
CC   -!- MISCELLANEOUS: The porphobilinogen subunits are added to the
CC       dipyrromethane group. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the HMBS family. {ECO:0000305}.
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DR   EMBL; BA000022; BAA17705.1; -; Genomic_DNA.
DR   PIR; S77147; S77147.
DR   AlphaFoldDB; P73660; -.
DR   SMR; P73660; -.
DR   IntAct; P73660; 1.
DR   STRING; 1148.1652786; -.
DR   PaxDb; P73660; -.
DR   EnsemblBacteria; BAA17705; BAA17705; BAA17705.
DR   KEGG; syn:slr1887; -.
DR   eggNOG; COG0181; Bacteria.
DR   InParanoid; P73660; -.
DR   OMA; LWQANHI; -.
DR   PhylomeDB; P73660; -.
DR   UniPathway; UPA00251; UER00319.
DR   UniPathway; UPA00668; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
DR   GO; GO:0004418; F:hydroxymethylbilane synthase activity; IBA:GO_Central.
DR   GO; GO:0015995; P:chlorophyll biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006783; P:heme biosynthetic process; IBA:GO_Central.
DR   GO; GO:0018160; P:peptidyl-pyrromethane cofactor linkage; IEA:InterPro.
DR   GO; GO:0006782; P:protoporphyrinogen IX biosynthetic process; IEA:UniProtKB-UniPathway.
DR   Gene3D; 3.30.160.40; -; 1.
DR   HAMAP; MF_00260; Porphobil_deam; 1.
DR   InterPro; IPR000860; HemC.
DR   InterPro; IPR022419; Porphobilin_deaminase_cofac_BS.
DR   InterPro; IPR022417; Porphobilin_deaminase_N.
DR   InterPro; IPR022418; Porphobilinogen_deaminase_C.
DR   InterPro; IPR036803; Porphobilinogen_deaminase_C_sf.
DR   PANTHER; PTHR11557; PTHR11557; 1.
DR   Pfam; PF01379; Porphobil_deam; 1.
DR   Pfam; PF03900; Porphobil_deamC; 1.
DR   PIRSF; PIRSF001438; 4pyrrol_synth_OHMeBilane_synth; 1.
DR   PRINTS; PR00151; PORPHBDMNASE.
DR   SUPFAM; SSF54782; SSF54782; 1.
DR   TIGRFAMs; TIGR00212; hemC; 1.
DR   PROSITE; PS00533; PORPHOBILINOGEN_DEAM; 1.
PE   3: Inferred from homology;
KW   Chlorophyll biosynthesis; Porphyrin biosynthesis; Reference proteome;
KW   Transferase.
FT   CHAIN           1..320
FT                   /note="Porphobilinogen deaminase"
FT                   /id="PRO_0000143003"
FT   MOD_RES         249
FT                   /note="S-(dipyrrolylmethanemethyl)cysteine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   320 AA;  34894 MW;  6A3C9CF48B1CA183 CRC64;
     MTVSTSAPTV RIGSRKSQLA LVQTYWVQEE LQKHFPDRQF DVETMETQGD KILDVALAKI
     GDKGLFTQEL EDGMLGKRTD LAVHSLKDLP TNLPAGLMLG CVTKRVNPAD ALVLNAKHQG
     KDLASLPEGA VIGTSSLRRL AQLRYHFPHL TFKDVRGNVN TRLAKLDSNE YDAIILAAAG
     LERLDMANRI DQLIPPEISL HAVGQGALGI ECREGDQEIL SLLKVLEDEN SRDRCLAERA
     FLRQLEGGCQ VPIGVNTHLD GDNLTLTGMV ASLDGQRLIK DTLSAPRKEA EKLGQDLALK
     LREQGAGEIL AEILAEAGRG