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P57500 (CYSG_BUCAI) Reviewed, UniProtKB/Swiss-Prot

Last modified June 11, 2014. Version 88. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (3) | 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:BU425
OrganismBuchnera aphidicola subsp. Acyrthosiphon pisum (strain APS) (Acyrthosiphon pisum symbiotic bacterium) [Reference proteome] [HAMAP]
Taxonomic identifier107806 [NCBI]
Taxonomic lineageBacteriaProteobacteriaGammaproteobacteriaEnterobacterialesEnterobacteriaceaeBuchnera

Protein attributes

Sequence length473 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 – 473473Siroheme synthase HAMAP-Rule MF_01646
PRO_0000150377

Regions

Nucleotide binding22 – 232NAD By similarity
Nucleotide binding43 – 442NAD By similarity
Region1 – 203203precorrin-2 dehydrogenase / sirohydrochlorin ferrochelatase By similarity
Region215 – 473259Uroporphyrinogen-III C-methyltransferase By similarity
Region300 – 3023S-adenosyl-L-methionine binding By similarity

Sites

Active site2471Proton acceptor By similarity
Active site2691Proton donor By similarity
Binding site2241S-adenosyl-L-methionine; via carbonyl oxygen By similarity
Binding site3051S-adenosyl-L-methionine; via carbonyl oxygen By similarity
Binding site3821S-adenosyl-L-methionine; via amide nitrogen By similarity
Binding site4111S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygen By similarity

Amino acid modifications

Modified residue1281Phosphoserine By similarity

Sequences

Sequence LengthMass (Da)Tools
P57500 [UniParc].

Last modified December 1, 2000. Version 1.
Checksum: 4B5781BC2AA565BA

FASTA47352,874
        10         20         30         40         50         60 
MNYLPIFIDL KSKNVLVIGA GEVGLNKIRI LLRAKAKVNV IAKELCSEVK LLLRDQKINW 

        70         80         90        100        110        120 
LSKNFDLIYL NKIFLVVSAT NDIKLNQYIF KKCNERCVLV NIVDDKLKCS FIFPSIIDRS 

       130        140        150        160        170        180 
PLIVAISSGG TAPVLLRLLR EKIEAILPNK LGDVAKIAGK WRLAIKKHFS NFLERRKFWE 

       190        200        210        220        230        240 
KLFHSIFVEH ILNGNKEQAI NVLKKNMNQN ISLTGEIILV GAGPGDSGLL TLRGLQVLQQ 

       250        260        270        280        290        300 
ADVVLYDYLV SEDILDLIRR DAKRICVGKR VGLKNITQNE IIKLLIFFAQ KGKKVVRLKG 

       310        320        330        340        350        360 
GDPFIFGRGS EEIEAAKDAG IHFQVVPGIT SAIGIAAYTG IPLTHRKYSQ GVIFITGHKC 

       370        380        390        400        410        420 
IDGFLNNWSI LSDPSYTLVV YMGTLKAVYI AQKLITFGRS KLTPIAIIVQ GTTIHQKVIV 

       430        440        450        460        470 
GCLGEIEKII PFAATPSLLI IGDVVHLHKK LAWFQSENIL KKIKNKFSTL TFI 

« Hide

References

[1]"Genome sequence of the endocellular bacterial symbiont of aphids Buchnera sp. APS."
Shigenobu S., Watanabe H., Hattori M., Sakaki Y., Ishikawa H.
Nature 407:81-86(2000) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: APS.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
BA000003 Genomic DNA. Translation: BAB13123.1.
RefSeqNP_240237.1. NC_002528.1.

3D structure databases

ProteinModelPortalP57500.
ModBaseSearch...
MobiDBSearch...

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAB13123; BAB13123; BAB13123.
GeneID1109773.
KEGGbuc:BU425.
PATRIC21244390. VBIBucAph127364_0434.

Phylogenomic databases

eggNOGCOG0007.
HOGENOMHOG000290518.
KOK02302.
OMALHQQLAW.
OrthoDBEOG6DRPFR.

Enzyme and pathway databases

BioCycBAPH107806:GBZJ-425-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_BUCAI
AccessionPrimary (citable) accession number: P57500
Entry history
Integrated into UniProtKB/Swiss-Prot: December 1, 2000
Last sequence update: December 1, 2000
Last modified: June 11, 2014
This is version 88 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

Buchnera aphidicola (subsp. Acyrthosiphon pisum)

Buchnera aphidicola (subsp. Acyrthosiphon pisum): entries and gene names