ID   CYSG_NEIMF              Reviewed;         483 AA.
AC   A1KU10;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2007, sequence version 1.
DT   27-MAR-2024, entry version 104.
DE   RecName: Full=Siroheme synthase {ECO:0000255|HAMAP-Rule:MF_01646};
DE   Includes:
DE     RecName: Full=Uroporphyrinogen-III C-methyltransferase {ECO:0000255|HAMAP-Rule:MF_01646};
DE              Short=Urogen III methylase {ECO:0000255|HAMAP-Rule:MF_01646};
DE              EC=2.1.1.107 {ECO:0000255|HAMAP-Rule:MF_01646};
DE     AltName: Full=SUMT {ECO:0000255|HAMAP-Rule:MF_01646};
DE     AltName: Full=Uroporphyrinogen III methylase {ECO:0000255|HAMAP-Rule:MF_01646};
DE              Short=UROM {ECO:0000255|HAMAP-Rule:MF_01646};
DE   Includes:
DE     RecName: Full=Precorrin-2 dehydrogenase {ECO:0000255|HAMAP-Rule:MF_01646};
DE              EC=1.3.1.76 {ECO:0000255|HAMAP-Rule:MF_01646};
DE   Includes:
DE     RecName: Full=Sirohydrochlorin ferrochelatase {ECO:0000255|HAMAP-Rule:MF_01646};
DE              EC=4.99.1.4 {ECO:0000255|HAMAP-Rule:MF_01646};
GN   Name=cysG {ECO:0000255|HAMAP-Rule:MF_01646};
GN   OrderedLocusNames=NMC1096;
OS   Neisseria meningitidis serogroup C / serotype 2a (strain ATCC 700532 / DSM
OS   15464 / FAM18).
OC   Bacteria; Pseudomonadota; Betaproteobacteria; Neisseriales; Neisseriaceae;
OC   Neisseria.
OX   NCBI_TaxID=272831;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700532 / DSM 15464 / FAM18;
RX   PubMed=17305430; DOI=10.1371/journal.pgen.0030023;
RA   Bentley S.D., Vernikos G.S., Snyder L.A.S., Churcher C., Arrowsmith C.,
RA   Chillingworth T., Cronin A., Davis P.H., Holroyd N.E., Jagels K.,
RA   Maddison M., Moule S., Rabbinowitsch E., Sharp S., Unwin L., Whitehead S.,
RA   Quail M.A., Achtman M., Barrell B.G., Saunders N.J., Parkhill J.;
RT   "Meningococcal genetic variation mechanisms viewed through comparative
RT   analysis of serogroup C strain FAM18.";
RL   PLoS Genet. 3:230-240(2007).
CC   -!- FUNCTION: Multifunctional enzyme that catalyzes the SAM-dependent
CC       methylations of uroporphyrinogen III at position C-2 and C-7 to form
CC       precorrin-2 via precorrin-1. Then it catalyzes the NAD-dependent ring
CC       dehydrogenation of precorrin-2 to yield sirohydrochlorin. Finally, it
CC       catalyzes the ferrochelation of sirohydrochlorin to yield siroheme.
CC       {ECO:0000255|HAMAP-Rule:MF_01646}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 S-adenosyl-L-methionine + uroporphyrinogen III = H(+) +
CC         precorrin-2 + 2 S-adenosyl-L-homocysteine; Xref=Rhea:RHEA:32459,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:57308, ChEBI:CHEBI:57856,
CC         ChEBI:CHEBI:58827, ChEBI:CHEBI:59789; EC=2.1.1.107;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01646};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=NAD(+) + precorrin-2 = 2 H(+) + NADH + sirohydrochlorin;
CC         Xref=Rhea:RHEA:15613, ChEBI:CHEBI:15378, ChEBI:CHEBI:57540,
CC         ChEBI:CHEBI:57945, ChEBI:CHEBI:58351, ChEBI:CHEBI:58827; EC=1.3.1.76;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01646};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 H(+) + siroheme = Fe(2+) + sirohydrochlorin;
CC         Xref=Rhea:RHEA:24360, ChEBI:CHEBI:15378, ChEBI:CHEBI:29033,
CC         ChEBI:CHEBI:58351, ChEBI:CHEBI:60052; EC=4.99.1.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01646};
CC   -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC       precorrin-2 from uroporphyrinogen III: step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_01646}.
CC   -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC       sirohydrochlorin from precorrin-2: step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_01646}.
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; siroheme
CC       biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01646}.
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; siroheme
CC       biosynthesis; siroheme from sirohydrochlorin: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01646}.
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; siroheme
CC       biosynthesis; sirohydrochlorin from precorrin-2: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01646}.
CC   -!- SIMILARITY: In the N-terminal section; belongs to the precorrin-2
CC       dehydrogenase / sirohydrochlorin ferrochelatase family.
CC       {ECO:0000255|HAMAP-Rule:MF_01646}.
CC   -!- SIMILARITY: In the C-terminal section; belongs to the precorrin
CC       methyltransferase family. {ECO:0000255|HAMAP-Rule:MF_01646}.
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DR   EMBL; AM421808; CAM10351.1; -; Genomic_DNA.
DR   RefSeq; WP_002239785.1; NC_008767.1.
DR   AlphaFoldDB; A1KU10; -.
DR   SMR; A1KU10; -.
DR   KEGG; nmc:NMC1096; -.
DR   HOGENOM; CLU_011276_2_0_4; -.
DR   UniPathway; UPA00148; UER00211.
DR   UniPathway; UPA00148; UER00222.
DR   UniPathway; UPA00262; UER00211.
DR   UniPathway; UPA00262; UER00222.
DR   UniPathway; UPA00262; UER00376.
DR   Proteomes; UP000002286; Chromosome.
DR   GO; GO:0051287; F:NAD binding; IEA:InterPro.
DR   GO; GO:0043115; F:precorrin-2 dehydrogenase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0051266; F:sirohydrochlorin ferrochelatase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004851; F:uroporphyrin-III C-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009236; P:cobalamin biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR   GO; GO:0019354; P:siroheme biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd11642; SUMT; 1.
DR   Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1.
DR   Gene3D; 1.10.8.210; Sirohaem synthase, dimerisation domain; 1.
DR   HAMAP; MF_01646; Siroheme_synth; 1.
DR   InterPro; IPR000878; 4pyrrol_Mease.
DR   InterPro; IPR035996; 4pyrrol_Methylase_sf.
DR   InterPro; IPR014777; 4pyrrole_Mease_sub1.
DR   InterPro; IPR014776; 4pyrrole_Mease_sub2.
DR   InterPro; IPR006366; CobA/CysG_C.
DR   InterPro; IPR028161; Met8-like.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   InterPro; IPR037115; Sirohaem_synt_dimer_dom_sf.
DR   InterPro; IPR012409; Sirohaem_synth.
DR   InterPro; IPR028281; Sirohaem_synthase_central.
DR   InterPro; IPR019478; Sirohaem_synthase_dimer_dom.
DR   InterPro; IPR006367; Sirohaem_synthase_N.
DR   InterPro; IPR003043; Uropor_MeTrfase_CS.
DR   NCBIfam; TIGR01469; cobA_cysG_Cterm; 1.
DR   NCBIfam; TIGR01470; cysG_Nterm; 1.
DR   PANTHER; PTHR35330; SIROHEME BIOSYNTHESIS PROTEIN MET8; 1.
DR   PANTHER; PTHR35330:SF1; SIROHEME BIOSYNTHESIS PROTEIN MET8; 1.
DR   Pfam; PF10414; CysG_dimeriser; 1.
DR   Pfam; PF13241; NAD_binding_7; 1.
DR   Pfam; PF14824; Sirohm_synth_M; 1.
DR   Pfam; PF00590; TP_methylase; 1.
DR   PIRSF; PIRSF036426; Sirohaem_synth; 1.
DR   SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 1.
DR   SUPFAM; SSF75615; Siroheme synthase middle domains-like; 1.
DR   SUPFAM; SSF53790; Tetrapyrrole methylase; 1.
DR   PROSITE; PS00839; SUMT_1; 1.
DR   PROSITE; PS00840; SUMT_2; 1.
PE   3: Inferred from homology;
KW   Cobalamin biosynthesis; Lyase; Methyltransferase; Multifunctional enzyme;
KW   NAD; Oxidoreductase; Phosphoprotein; Porphyrin biosynthesis;
KW   S-adenosyl-L-methionine; Transferase.
FT   CHAIN           1..483
FT                   /note="Siroheme synthase"
FT                   /id="PRO_0000330524"
FT   REGION          1..203
FT                   /note="Precorrin-2 dehydrogenase /sirohydrochlorin
FT                   ferrochelatase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   REGION          214..483
FT                   /note="Uroporphyrinogen-III C-methyltransferase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   ACT_SITE        246
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   ACT_SITE        268
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         22..23
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         43..44
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         223
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         299..301
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         304
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         329..330
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         381
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   BINDING         410
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
FT   MOD_RES         128
FT                   /note="Phosphoserine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01646"
SQ   SEQUENCE   483 AA;  52308 MW;  804229B2A4A2610E CRC64;
     MNYFPIFANL AGRPVLVVGG GAVAARKISL LLKAGAEVRV AAKHLNAELS ALAAENKILW
     LAEEFRAEHI RTVFLIIAAS SDQALNRRVF HLAESCQKPV NVVDDRDHCS FIFPSVIDRN
     PVQIAVSSSG SAPVLARLLR ERLEALLPPS LGDMAEISGR WRDAVKGKLK SVTERRRFWE
     KQFNGRFAAL VKNRQNTLAE RELAKQLEQN YQGGFVSLVG AGPGDAGLLT LKGLQEIQQA
     DVVLYDALVS DGILSLVRRD AERIFVGKRA RGGRTPQEDT NALMVRLARE GRRVVRLKGG
     DPFVFGRGGE ELETLARHQI PFSVVPGITA AVGATAYAGI PLTHRDYAQS AVFVTGHRKA
     DAPDIEWQTL ARSRQTLVIY MGALKAALIA ERLQQHGRSP DTPAAVISQG TLPAQKTATG
     TLANLSELAE TAPNPALIVI GEVVGLHEKL AWFGENAKKE SNPAEHAYFA LDGLGTGQEQ
     QAA
//