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Protein

Siroheme synthase

Gene

cysG

Organism
Escherichia coli (strain SMS-3-5 / SECEC)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Protein inferred from homologyi

Functioni

Multifunctional enzyme that catalyzes the SAM-dependent methylations of uroporphyrinogen III at position C-2 and C-7 to form precorrin-2 via precorrin-1. Then it catalyzes the NAD-dependent ring dehydrogenation of precorrin-2 to yield sirohydrochlorin. Finally, it catalyzes the ferrochelation of sirohydrochlorin to yield siroheme.UniRule annotation

Catalytic activityi

S-adenosyl-L-methionine + uroporphyrinogen III = S-adenosyl-L-homocysteine + precorrin-1.UniRule annotation
S-adenosyl-L-methionine + precorrin-1 = S-adenosyl-L-homocysteine + precorrin-2.UniRule annotation
Precorrin-2 + NAD+ = sirohydrochlorin + NADH.UniRule annotation
Siroheme + 2 H+ = sirohydrochlorin + Fe2+.UniRule annotation

Pathway: adenosylcobalamin biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes precorrin-2 from uroporphyrinogen III.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Siroheme synthase (cysG)
This subpathway is part of the pathway adenosylcobalamin biosynthesis, which is itself part of Cofactor biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes precorrin-2 from uroporphyrinogen III, the pathway adenosylcobalamin biosynthesis and in Cofactor biosynthesis.

Pathway: adenosylcobalamin biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes sirohydrochlorin from precorrin-2.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Siroheme synthase (cysG)
This subpathway is part of the pathway adenosylcobalamin biosynthesis, which is itself part of Cofactor biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes sirohydrochlorin from precorrin-2, the pathway adenosylcobalamin biosynthesis and in Cofactor biosynthesis.

Pathway: siroheme biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes precorrin-2 from uroporphyrinogen III.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Siroheme synthase (cysG)
This subpathway is part of the pathway siroheme biosynthesis, which is itself part of Porphyrin-containing compound metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes precorrin-2 from uroporphyrinogen III, the pathway siroheme biosynthesis and in Porphyrin-containing compound metabolism.

Pathway: siroheme biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes siroheme from sirohydrochlorin.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Siroheme synthase (cysG)
This subpathway is part of the pathway siroheme biosynthesis, which is itself part of Porphyrin-containing compound metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes siroheme from sirohydrochlorin, the pathway siroheme biosynthesis and in Porphyrin-containing compound metabolism.

Pathway: siroheme biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes sirohydrochlorin from precorrin-2.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Siroheme synthase (cysG)
This subpathway is part of the pathway siroheme biosynthesis, which is itself part of Porphyrin-containing compound metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes sirohydrochlorin from precorrin-2, the pathway siroheme biosynthesis and in Porphyrin-containing compound metabolism.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei225 – 2251S-adenosyl-L-methionine; via carbonyl oxygenUniRule annotation
Active sitei248 – 2481Proton acceptorUniRule annotation
Active sitei270 – 2701Proton donorUniRule annotation
Binding sitei306 – 3061S-adenosyl-L-methionine; via carbonyl oxygenUniRule annotation
Binding sitei382 – 3821S-adenosyl-L-methionine; via amide nitrogenUniRule annotation
Binding sitei411 – 4111S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygenUniRule annotation

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi22 – 232NADUniRule annotation
Nucleotide bindingi43 – 442NADUniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Lyase, Methyltransferase, Oxidoreductase, Transferase

Keywords - Biological processi

Cobalamin biosynthesis, Porphyrin biosynthesis

Keywords - Ligandi

NAD, S-adenosyl-L-methionine

Enzyme and pathway databases

BioCyciECOL439855:GHHB-3646-MONOMER.
UniPathwayiUPA00148; UER00211.
UPA00148; UER00222.
UPA00262; UER00211.
UPA00262; UER00222.
UPA00262; UER00376.

Names & Taxonomyi

Protein namesi
Recommended name:
Siroheme synthaseUniRule annotation
Including the following 3 domains:
Uroporphyrinogen-III C-methyltransferaseUniRule annotation (EC:2.1.1.107UniRule annotation)
Short name:
Urogen III methylaseUniRule annotation
Alternative name(s):
SUMTUniRule annotation
Uroporphyrinogen III methylaseUniRule annotation
Short name:
UROMUniRule annotation
Precorrin-2 dehydrogenaseUniRule annotation (EC:1.3.1.76UniRule annotation)
Sirohydrochlorin ferrochelataseUniRule annotation (EC:4.99.1.4UniRule annotation)
Gene namesi
Name:cysGUniRule annotation
Ordered Locus Names:EcSMS35_3650
OrganismiEscherichia coli (strain SMS-3-5 / SECEC)
Taxonomic identifieri439855 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacterialesEnterobacteriaceaeEscherichia
ProteomesiUP000007011 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 457457Siroheme synthasePRO_1000186946Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei128 – 1281PhosphoserineUniRule annotation

Keywords - PTMi

Phosphoprotein

Structurei

3D structure databases

ProteinModelPortaliB1LHG9.
SMRiB1LHG9. Positions 1-457.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni1 – 204204precorrin-2 dehydrogenase / sirohydrochlorin ferrochelataseUniRule annotationAdd
BLAST
Regioni216 – 457242Uroporphyrinogen-III C-methyltransferaseUniRule annotationAdd
BLAST
Regioni301 – 3033S-adenosyl-L-methionine bindingUniRule annotation
Regioni331 – 3322S-adenosyl-L-methionine bindingUniRule annotation

Sequence similaritiesi

In the N-terminal section; belongs to the precorrin-2 dehydrogenase / sirohydrochlorin ferrochelatase family.UniRule annotation
In the C-terminal section; belongs to the precorrin methyltransferase family.UniRule annotation

Phylogenomic databases

eggNOGiCOG0007.
HOGENOMiHOG000290518.
KOiK02302.
OMAiQASFIMP.
OrthoDBiEOG6DRPFR.

Family and domain databases

Gene3Di1.10.8.210. 1 hit.
3.30.950.10. 1 hit.
3.40.1010.10. 1 hit.
3.40.50.720. 1 hit.
HAMAPiMF_01646. Siroheme_synth.
InterProiIPR000878. 4pyrrol_Mease.
IPR014777. 4pyrrole_Mease_sub1.
IPR014776. 4pyrrole_Mease_sub2.
IPR006366. CobA/CysG_C.
IPR016040. NAD(P)-bd_dom.
IPR012409. Sirohaem_synth.
IPR019478. Sirohaem_synthase_dimer_dom.
IPR006367. Sirohaem_synthase_N.
IPR003043. Uropor_MeTrfase_CS.
[Graphical view]
PfamiPF10414. CysG_dimeriser. 1 hit.
PF13241. NAD_binding_7. 1 hit.
PF00590. TP_methylase. 1 hit.
[Graphical view]
PIRSFiPIRSF036426. Sirohaem_synth. 1 hit.
SUPFAMiSSF53790. SSF53790. 1 hit.
TIGRFAMsiTIGR01469. cobA_cysG_Cterm. 1 hit.
TIGR01470. cysG_Nterm. 1 hit.
PROSITEiPS00839. SUMT_1. 1 hit.
PS00840. SUMT_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

B1LHG9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDHLPIFCQL RDRDCLIVGG GDVAERKARL LLDAGARLTV NALAFIPQFT
60 70 80 90 100
AWADAGMLTL VEGPFDESLL DTCWLAIAAT DDDALNQRVS EAAEARRIFC
110 120 130 140 150
NVVDAPKAAS FIMPSIIDRS PLMVAVSSGG TSPVLARLLR EKLESLLPLH
160 170 180 190 200
LGQVAKYAGQ LRGRVKQQFA TMGERRRFWE KLFVNDRLAQ SLANNDQKAI
210 220 230 240 250
TETTEQLINE PLDHRGEVVL VGAGPGDAGL LTLKGLQQIQ QADVVVYDRL
260 270 280 290 300
VSDDIMNLVR RDADRVFVGK RAGYHCVPQE EINQILLREA QKGKRVVRLK
310 320 330 340 350
GGDPFIFGRG GEELETLCNA GIPFSVVPGI TAASGCSAYS GIPLTHRDYA
360 370 380 390 400
QSVRLITGHL KTGGELDWEN LAAEKQTLVF YMGLNQAATI QQKLIEHGMP
410 420 430 440 450
GEMPVAIVEN GTAVTQRVID GTLTQLGELA QQMNSPSLII IGRVVGLRDK

LNWFSNH
Length:457
Mass (Da):49,951
Last modified:April 29, 2008 - v1
Checksum:iDDDE0DC90C5CF2F4
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000970 Genomic DNA. Translation: ACB16588.1.
RefSeqiWP_000349855.1. NC_010498.1.
YP_001745617.1. NC_010498.1.

Genome annotation databases

EnsemblBacteriaiACB16588; ACB16588; EcSMS35_3650.
KEGGiecm:EcSMS35_3650.
PATRICi18436231. VBIEscCol6161_3799.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000970 Genomic DNA. Translation: ACB16588.1.
RefSeqiWP_000349855.1. NC_010498.1.
YP_001745617.1. NC_010498.1.

3D structure databases

ProteinModelPortaliB1LHG9.
SMRiB1LHG9. Positions 1-457.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiACB16588; ACB16588; EcSMS35_3650.
KEGGiecm:EcSMS35_3650.
PATRICi18436231. VBIEscCol6161_3799.

Phylogenomic databases

eggNOGiCOG0007.
HOGENOMiHOG000290518.
KOiK02302.
OMAiQASFIMP.
OrthoDBiEOG6DRPFR.

Enzyme and pathway databases

UniPathwayiUPA00148; UER00211.
UPA00148; UER00222.
UPA00262; UER00211.
UPA00262; UER00222.
UPA00262; UER00376.
BioCyciECOL439855:GHHB-3646-MONOMER.

Family and domain databases

Gene3Di1.10.8.210. 1 hit.
3.30.950.10. 1 hit.
3.40.1010.10. 1 hit.
3.40.50.720. 1 hit.
HAMAPiMF_01646. Siroheme_synth.
InterProiIPR000878. 4pyrrol_Mease.
IPR014777. 4pyrrole_Mease_sub1.
IPR014776. 4pyrrole_Mease_sub2.
IPR006366. CobA/CysG_C.
IPR016040. NAD(P)-bd_dom.
IPR012409. Sirohaem_synth.
IPR019478. Sirohaem_synthase_dimer_dom.
IPR006367. Sirohaem_synthase_N.
IPR003043. Uropor_MeTrfase_CS.
[Graphical view]
PfamiPF10414. CysG_dimeriser. 1 hit.
PF13241. NAD_binding_7. 1 hit.
PF00590. TP_methylase. 1 hit.
[Graphical view]
PIRSFiPIRSF036426. Sirohaem_synth. 1 hit.
SUPFAMiSSF53790. SSF53790. 1 hit.
TIGRFAMsiTIGR01469. cobA_cysG_Cterm. 1 hit.
TIGR01470. cysG_Nterm. 1 hit.
PROSITEiPS00839. SUMT_1. 1 hit.
PS00840. SUMT_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "Insights into the environmental resistance gene pool from the genome sequence of the multidrug-resistant environmental isolate Escherichia coli SMS-3-5."
    Fricke W.F., Wright M.S., Lindell A.H., Harkins D.M., Baker-Austin C., Ravel J., Stepanauskas R.
    J. Bacteriol. 190:6779-6794(2008) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: SMS-3-5 / SECEC.

Entry informationi

Entry nameiCYSG_ECOSM
AccessioniPrimary (citable) accession number: B1LHG9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: April 29, 2008
Last modified: June 24, 2015
This is version 57 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Multifunctional enzyme

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.