ID   CYSG2_AERHH             Reviewed;         470 AA.
AC   A0KP37;
DT   29-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-DEC-2006, sequence version 1.
DT   16-JUN-2009, entry version 21.
DE   RecName: Full=Siroheme synthase 2;
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=cysG2; OrderedLocusNames=AHA_3568;
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; ABK38644.1; -; Genomic_DNA.
DR   RefSeq; YP_858038.1; -.
DR   GeneID; 4488263; -.
DR   GenomeReviews; CP000462_GR; AHA_3568.
DR   KEGG; aha:AHA_3568; -.
DR   TIGR; AHA_3568; -.
DR   OMA; A0KP37; DKLVPQQ.
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    470       Siroheme synthase 2.
FT                                /FTId=PRO_0000330487.
FT   REGION      216    456       Uroporphyrinogen-III C-methyltransferase.
SQ   SEQUENCE   470 AA;  50861 MW;  9E572A53CAAF5A6A CRC64;
     MDYLPMFAKL DGRPVLLVGG GEVALRKARL LLAAGARLTL VSPELEPDFH QFADRFTHLA
     ERFTPAHLTG QILVVAATDD LEVNALVYQS ANQLGLFVNV VDDPKRSSFI FPSIIDRSPI
     MVAVSSGGKA PVLVRLLRER LESLLPRHLG ALAELSGRVR DQAKRVLSSI SDRRRFWERA
     FASNTLAGLI EKEDWQGAEQ WLNDGLDQAK NEVGEVVLVG AGPGDPGLLT LKALQQIQQA
     EVVLYDQLVS PEILDLVRRD ATLVSVGKKA GAHSVPQEET NRLLVEYAKA GNRVVRLKGG
     DPFMFGRGGE ELEVLAEEGI PFSVVPGITA AAGATAYAGI PLTHRDHAQS AVFITGHCQI
     DGKEPDWQQL AATSQTLVIY MGLMRSEHIQ QQLVSHGRSS ATPIAIIERG TTARQRVLTG
     TLADLAELAA QAVSPSLIVI GEVVALRERL AWFGEGQQQG TCDLKLVSLA
//