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B7M1S1 (CYSG_ECO8A) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 40. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Siroheme synthase

Including the following 3 domains:

  1. Uroporphyrinogen-III C-methyltransferase
    Short name=Urogen III methylase
    EC=2.1.1.107
    Alternative name(s):
    SUMT
    Uroporphyrinogen III methylase
    Short name=UROM
  2. Precorrin-2 dehydrogenase
    EC=1.3.1.76
  3. Sirohydrochlorin ferrochelatase
    EC=4.99.1.4
Gene names
Name:cysG
Ordered Locus Names:ECIAI1_3507
OrganismEscherichia coli O8 (strain IAI1) [Complete proteome] [HAMAP]
Taxonomic identifier585034 [NCBI]
Taxonomic lineageBacteriaProteobacteriaGammaproteobacteriaEnterobacterialesEnterobacteriaceaeEscherichia

Protein attributes

Sequence length457 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

Multifunctional enzyme that catalyzes the SAM-dependent methylation of uroporphyrinogen III at position C-2 and C-7 to form precorrin-2 and then position C-12 or C-18 to form trimethylpyrrocorphin 2. It also catalyzes the conversion of precorrin-2 into siroheme. This reaction consists of the NAD-dependent oxidation of precorrin-2 into sirohydrochlorin and its subsequent ferrochelation into siroheme By similarity. HAMAP-Rule MF_01646

Catalytic activity

S-adenosyl-L-methionine + uroporphyrinogen III = S-adenosyl-L-homocysteine + precorrin-1. HAMAP-Rule MF_01646

S-adenosyl-L-methionine + precorrin-1 = S-adenosyl-L-homocysteine + precorrin-2. HAMAP-Rule MF_01646

Precorrin-2 + NAD+ = sirohydrochlorin + NADH. HAMAP-Rule MF_01646

Siroheme + 2 H+ = sirohydrochlorin + Fe2+. HAMAP-Rule MF_01646

Pathway

Cofactor biosynthesis; adenosylcobalamin biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. HAMAP-Rule MF_01646

Cofactor biosynthesis; adenosylcobalamin biosynthesis; sirohydrochlorin from precorrin-2: step 1/1.

Porphyrin-containing compound metabolism; siroheme biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. HAMAP-Rule MF_01646

Porphyrin-containing compound metabolism; siroheme biosynthesis; siroheme from sirohydrochlorin: step 1/1.

Porphyrin-containing compound metabolism; siroheme biosynthesis; sirohydrochlorin from precorrin-2: step 1/1.

Sequence similarities

Belongs to the precorrin methyltransferase family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 457457Siroheme synthase HAMAP-Rule MF_01646
PRO_1000186942

Regions

Region218 – 457240Uroporphyrinogen-III C-methyltransferase HAMAP-Rule MF_01646

Sequences

Sequence LengthMass (Da)Tools
B7M1S1 [UniParc].

Last modified February 10, 2009. Version 1.
Checksum: D192890D094CE3F0

FASTA45749,981
        10         20         30         40         50         60 
MDHLPIFCQL RDRDCLIVGG GDVAERKARL LLDAGARLTV NALAFIPQFT AWADAGMLTL 

        70         80         90        100        110        120 
VEGPFDESLL DTCWLAIAAT DDDALNQRVS EAAEARRIFC NVVDAPKAAS FIMPSIIDRS 

       130        140        150        160        170        180 
PLMVAVSSGG TSPVLARLLR EKLESLLPLH LGQVAKYAGQ LRGRVKQQFA TMSERRRFWE 

       190        200        210        220        230        240 
KLFVNDRLAQ SLANNDQKAI TETTEQLINE PLDHRGEVVL VGAGPGDAGL LTLKGLQQIQ 

       250        260        270        280        290        300 
QADVVVYDRL VSDDIMNLVR RDADRVFVGK RAGYHCVPQE EINQILLREA QKGKRVVRLK 

       310        320        330        340        350        360 
GGDPFIFGRG GEELETLCNA GIPFSVVPGI TAASGCSAYS GIPLTHRDYA QSVRLITGHL 

       370        380        390        400        410        420 
KTGGELDWEN LAAEKQTLVF YMGLNQAATI QQKLIEHGMP GEMPVAIVEN GTAVTQRVID 

       430        440        450 
GTLTQLGELA QQMNSPSLII IGRVVGLRDK LNWFSNH 

« Hide

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CU928160 Genomic DNA. Translation: CAR00308.1.
RefSeqYP_002388827.1. NC_011741.1.

3D structure databases

ProteinModelPortalB7M1S1.
SMRB7M1S1. Positions 1-457.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING585034.ECIAI1_3507.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaCAR00308; CAR00308; ECIAI1_3507.
GeneID7127885.
KEGGecr:ECIAI1_3507.
PATRIC18326265. VBIEscCol26572_3425.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0007.
HOGENOMHOG000290518.
KOK02302.
OMAQASFIMP.
OrthoDBEOG6DRPFR.
ProtClustDBPRK10637.

Enzyme and pathway databases

BioCycECOL585034:GJ84-3542-MONOMER.
UniPathwayUPA00148; UER00211.
UPA00148; UER00222.
UPA00262; UER00211.
UPA00262; UER00222.
UPA00262; UER00376.

Family and domain databases

Gene3D1.10.8.210. 1 hit.
3.30.950.10. 1 hit.
3.40.1010.10. 1 hit.
3.40.50.720. 1 hit.
HAMAPMF_01646. Siroheme_synth.
InterProIPR000878. 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]
PfamPF10414. CysG_dimeriser. 1 hit.
PF13241. NAD_binding_7. 1 hit.
PF00590. TP_methylase. 1 hit.
[Graphical view]
PIRSFPIRSF036426. Sirohaem_synth. 1 hit.
SUPFAMSSF53790. SSF53790. 1 hit.
TIGRFAMsTIGR01469. cobA_cysG_Cterm. 1 hit.
TIGR01470. cysG_Nterm. 1 hit.
PROSITEPS00839. SUMT_1. 1 hit.
PS00840. SUMT_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameCYSG_ECO8A
AccessionPrimary (citable) accession number: B7M1S1
Entry history
Integrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: February 10, 2009
Last modified: February 19, 2014
This is version 40 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

PATHWAY comments

Index of metabolic and biosynthesis pathways