Skip Header

You are using a version of Internet Explorer that may not display all features of this website. Please upgrade to a modern browser.
Contribute Send feedback
Read comments (?) or add your own

A5CXE4 (CYSG_VESOH) Reviewed, UniProtKB/Swiss-Prot

Last modified June 11, 2014. Version 55. 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:COSY_0254
OrganismVesicomyosocius okutanii subsp. Calyptogena okutanii (strain HA) [Complete proteome] [HAMAP]
Taxonomic identifier412965 [NCBI]
Taxonomic lineageBacteriaProteobacteriaGammaproteobacteriasulfur-oxidizing symbionts

Protein attributes

Sequence length466 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

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 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

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

In the C-terminal section; belongs to the precorrin methyltransferase family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 466466Siroheme synthase HAMAP-Rule MF_01646
PRO_0000330567

Regions

Nucleotide binding22 – 232NAD By similarity
Nucleotide binding43 – 442NAD By similarity
Region1 – 203203precorrin-2 dehydrogenase / sirohydrochlorin ferrochelatase By similarity
Region216 – 466251Uroporphyrinogen-III C-methyltransferase By similarity
Region301 – 3033S-adenosyl-L-methionine binding By similarity
Region331 – 3322S-adenosyl-L-methionine binding By similarity

Sites

Active site2481Proton acceptor By similarity
Active site2701Proton donor By similarity
Binding site2251S-adenosyl-L-methionine; via carbonyl oxygen By similarity
Binding site3061S-adenosyl-L-methionine; via carbonyl oxygen By similarity
Binding site3831S-adenosyl-L-methionine; via amide nitrogen By similarity
Binding site4121S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygen By similarity

Amino acid modifications

Modified residue1281Phosphoserine By similarity

Sequences

Sequence LengthMass (Da)Tools
A5CXE4 [UniParc].

Last modified June 12, 2007. Version 1.
Checksum: B0B8A1AD2C2AE3C1

FASTA46651,511
        10         20         30         40         50         60 
MNYLPIFIDI KQKPCLVVGG GSIAYRKINL LLKAYGQVTC IAKSSCKNVA KLVNNKKIIY 

        70         80         90        100        110        120 
IERSFESSDV NGQVLIISAT NNATLNKKVS ELASQNNIPV NVIDSPDLCT FIMPSIVDRS 

       130        140        150        160        170        180 
PILIAISSAG KAPVLARIIR AKLESTLPHA YGKLAELAGN FRDQVKAKFS RIEDKRYFWE 

       190        200        210        220        230        240 
EIFSGIIAEK VFSGKIQEAK ADLQAQLNNT VEAQVGAVYL VGGGPGDPDL LTFRALRLMQ 

       250        260        270        280        290        300 
QADVVLYDRL VSDRVMELVR RDAQLIYVGK ECDNHAVPQG DINQLLVDLA KEGRRVCRLK 

       310        320        330        340        350        360 
GGDPFIFGRG GEEIETLAEN GIPFQVVPGI TAASGCSTYS GIPLTHRDYS QSCRFVTGHL 

       370        380        390        400        410        420 
KDGSMNLPWH ELAIEQQTIV FYMALNSVEY LSGQLIIHNM RPDMPVALVE KGTTPEQKVY 

       430        440        450        460 
ITTLKELPNL VENETIHAPT LIIIGEVVKL REKLNWFDAK PISSKK 

« Hide

References

[1]"Reduced genome of the thioautotrophic intracellular symbiont in a deep-sea clam, Calyptogena okutanii."
Kuwahara H., Yoshida T., Takaki Y., Shimamura S., Nishi S., Harada M., Matsuyama K., Takishita K., Kawato M., Uematsu K., Fujiwara Y., Sato T., Kato C., Kitagawa M., Kato I., Maruyama T.
Curr. Biol. 17:881-886(2007) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: HA.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AP009247 Genomic DNA. Translation: BAF61384.1.
RefSeqYP_001219108.1. NC_009465.1.

3D structure databases

ProteinModelPortalA5CXE4.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING412965.COSY_0254.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAF61384; BAF61384; COSY_0254.
GeneID5172080.
KEGGvok:COSY_0254.
PATRIC32020325. VBICanVes128383_0252.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0007.
HOGENOMHOG000290518.
KOK02302.
OMAQASFIMP.
OrthoDBEOG6DRPFR.

Enzyme and pathway databases

BioCycCVES412965:GHZZ-254-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.
PROSITEPS00840. SUMT_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameCYSG_VESOH
AccessionPrimary (citable) accession number: A5CXE4
Entry history
Integrated into UniProtKB/Swiss-Prot: April 29, 2008
Last sequence update: June 12, 2007
Last modified: June 11, 2014
This is version 55 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