ID   CYSG3_AERHH             Reviewed;         468 AA.
AC   A0KQJ4;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-DEC-2006, sequence version 1.
DT   16-JUN-2009, entry version 23.
DE   RecName: Full=Siroheme synthase 3;
DE   Includes:
DE     RecName: Full=Uroporphyrinogen-III C-methyltransferase;
DE              Short=Urogen III methylase;
DE              EC=2.1.1.107;
DE     AltName: Full=SUMT;
DE     AltName: Full=Uroporphyrinogen III methylase;
DE              Short=UROM;
DE   Includes:
DE     RecName: Full=Precorrin-2 dehydrogenase;
DE              EC=1.3.1.76;
DE   Includes:
DE     RecName: Full=Sirohydrochlorin ferrochelatase;
DE              EC=4.99.1.4;
GN   Name=cysG3; OrderedLocusNames=AHA_4121;
OS   Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / NCIB 9240).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Aeromonadales;
OC   Aeromonadaceae; Aeromonas.
OX   NCBI_TaxID=380703;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=16980456; DOI=10.1128/JB.00621-06;
RA   Seshadri R., Joseph S.W., Chopra A.K., Sha J., Shaw J., Graf J.,
RA   Haft D.H., Wu M., Ren Q., Rosovitz M.J., Madupu R., Tallon L., Kim M.,
RA   Jin S., Vuong H., Stine O.C., Ali A., Horneman A.J., Heidelberg J.F.;
RT   "Genome sequence of Aeromonas hydrophila ATCC 7966T: jack of all
RT   trades.";
RL   J. Bacteriol. 188:8272-8282(2006).
CC   -!- FUNCTION: Multifunctional enzyme that catalyzes the SAM-dependent
CC       methylation of uroporphyrinogen III at position C-2 and C-7 to
CC       form precorrin-2 and then position C-12 or C-18 to form
CC       trimethylpyrrocorphin 2. It also catalyzes the conversion of
CC       precorrin-2 into siroheme. This reaction consists of the NAD-
CC       dependent oxidation of precorrin-2 into sirohydrochlorin and its
CC       subsequent ferrochelation into siroheme (By similarity).
CC   -!- CATALYTIC ACTIVITY: S-adenosyl-L-methionine + uroporphyrinogen III
CC       = S-adenosyl-L-homocysteine + precorrin-1.
CC   -!- CATALYTIC ACTIVITY: S-adenosyl-L-methionine + precorrin-1 = S-
CC       adenosyl-L-homocysteine + precorrin-2.
CC   -!- CATALYTIC ACTIVITY: Precorrin-2 + NAD(+) = sirohydrochlorin +
CC       NADH.
CC   -!- CATALYTIC ACTIVITY: Siroheme + 2 H(+) = sirohydrochlorin + Fe(2+).
CC   -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC       precorrin-2 from uroporphyrinogen III: step 1/1.
CC   -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC       sirohydrochlorin from precorrin-2: step 1/1.
CC   -!- PATHWAY: Porphyrin metabolism; siroheme biosynthesis; precorrin-2
CC       from uroporphyrinogen III: step 1/1.
CC   -!- PATHWAY: Porphyrin metabolism; siroheme biosynthesis; siroheme
CC       from sirohydrochlorin: step 1/1.
CC   -!- PATHWAY: Porphyrin metabolism; siroheme biosynthesis;
CC       sirohydrochlorin from precorrin-2: step 1/1.
CC   -!- SIMILARITY: Belongs to the precorrin methyltransferase family.
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DR   EMBL; CP000462; ABK37547.1; -; Genomic_DNA.
DR   RefSeq; YP_858545.1; -.
DR   GeneID; 4488138; -.
DR   GenomeReviews; CP000462_GR; AHA_4121.
DR   KEGG; aha:AHA_4121; -.
DR   TIGR; AHA_4121; -.
DR   OMA; A0KQJ4; MCRRDAE.
DR   GO; GO:0005488; F:binding; IEA:InterPro.
DR   GO; GO:0043115; F:precorrin-2 dehydrogenase activity; IEA:HAMAP.
DR   GO; GO:0051266; F:sirohydrochlorin ferrochelatase activity; IEA:EC.
DR   GO; GO:0004851; F:uroporphyrin-III C-methyltransferase activity; IEA:HAMAP.
DR   GO; GO:0009236; P:cobalamin biosynthetic process; IEA:HAMAP.
DR   GO; GO:0055114; P:oxidation reduction; IEA:UniProtKB-KW.
DR   GO; GO:0019354; P:siroheme biosynthetic process; IEA:HAMAP.
DR   HAMAP; MF_01646; -; 1.
DR   InterPro; IPR000878; 4pyrrol_Mease.
DR   InterPro; IPR006366; CobA_cysG_C.
DR   InterPro; IPR019478; Sirohaem_synthase_dimer_dom.
DR   InterPro; IPR006367; Sirohaem_synthase_N.
DR   InterPro; IPR003043; Uropor_MeTrfase_CS.
DR   Pfam; PF10414; CysG_dimeriser; 1.
DR   Pfam; PF00590; TP_methylase; 1.
DR   TIGRFAMs; TIGR01469; cobA_cysG_Cterm; 1.
DR   TIGRFAMs; TIGR01470; cysG_Nterm; 1.
DR   PROSITE; PS00839; SUMT_1; 1.
DR   PROSITE; PS00840; SUMT_2; 1.
PE   3: Inferred from homology;
KW   Cobalamin biosynthesis; Complete proteome; Lyase; Methyltransferase;
KW   Multifunctional enzyme; NAD; Oxidoreductase; Porphyrin biosynthesis;
KW   S-adenosyl-L-methionine; Transferase.
FT   CHAIN         1    468       Siroheme synthase 3.
FT                                /FTId=PRO_0000330488.
FT   REGION      218    458       Uroporphyrinogen-III C-methyltransferase.
SQ   SEQUENCE   468 AA;  49807 MW;  B9848BE34016C651 CRC64;
     MDYLPIFCRL DNKPVLLVGG GEVAERKARL LLDAGAQLTV VAPELDPELA ELAANGSIEW
     LAGEFAPQQL TGKWLVVAAT DRREVNALVY QSANQARIFA NVVDDPKRSS FIMPSIIDRS
     PLMVAISSGG KAPVLARLLR EKLEALLPQH LGAVAAFAGS LRERVKARFA SMGERRRFWE
     RLLGADRLGQ ALARGDSASA NQLADSLFAD ESQSGGEVVL VGAGPGDPGL LTLHALRQMQ
     QADVVVYDRL VSDEVMALVR RDARRIFVGK QAGNHCVPQE GINQLLLDEA KKGQRVVRLK
     GGDPFIFGRG GEELETLVGS GIGFQVVPGI TAASGCAAYA GIPLTHRDHA QSVRFVTAHG
     KGGAQDLDWP LLAKDKQTLV FYMGLSSCTT IREQLLTHGK AGDTPVALIE RGTQPSQRVI
     RGTLAQLPEL ALGVESPALI MVGSVVTLAD QLAWFGQGGA ADAALASA
//