Reviewed, UniProtKB/Swiss-Prot Q606C9 (CYSG_METCA)

Names and origin

Protein names

Recommended name:
    Siroheme synthase
Including the following 3 domains:
    1- Recommended name:
            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- Recommended name:
            Precorrin-2 dehydrogenase
              EC=1.3.1.76
    3- Recommended name:
            Sirohydrochlorin ferrochelatase
              EC=4.99.1.4

Gene names

Name:	cysG
Ordered Locus Names:	MCA2089

Organism

Methylococcus capsulatus [Complete proteome] [HAMAP]

Taxonomic identifier

414 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Methylococcales › Methylococcaceae › Methylococcus

Protein attributes

Sequence length	474 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred 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.
Catalytic activity	S-adenosyl-L-methionine + uroporphyrinogen III = S-adenosyl-L-homocysteine + precorrin-1. HAMAP MF_01646 S-adenosyl-L-methionine + precorrin-1 = S-adenosyl-L-homocysteine + precorrin-2. HAMAP MF_01646 Precorrin-2 + NAD+ = sirohydrochlorin + NADH. HAMAP MF_01646 Siroheme + 2 H+ = sirohydrochlorin + Fe2+. HAMAP MF_01646
Pathway	Cofactor biosynthesis; adenosylcobalamin biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. HAMAP MF_01646 Cofactor biosynthesis; adenosylcobalamin biosynthesis; sirohydrochlorin from precorrin-2: step 1/1. Porphyrin metabolism; siroheme biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. HAMAP MF_01646 Porphyrin metabolism; siroheme biosynthesis; siroheme from sirohydrochlorin: step 1/1. HAMAP MF_01646 Porphyrin metabolism; siroheme biosynthesis; sirohydrochlorin from precorrin-2: step 1/1.
Sequence similarities	Belongs to the precorrin methyltransferase family.

Ontologies

Keywords
Biological process	Cobalamin biosynthesis Porphyrin biosynthesis
Ligand	NAD S-adenosyl-L-methionine
Molecular function	Lyase Methyltransferase Oxidoreductase Transferase
Technical term	Complete proteome Multifunctional enzyme
Gene Ontology (GO)
Biological process	cobalamin biosynthetic process Inferred from electronic annotation. Source: HAMAP oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW siroheme biosynthetic process Inferred from electronic annotation. Source: HAMAP
Molecular function	binding Inferred from electronic annotation. Source: InterPro precorrin-2 dehydrogenase activity Inferred from electronic annotation. Source: HAMAP sirohydrochlorin ferrochelatase activity Inferred from electronic annotation. Source: EC uroporphyrin-III C-methyltransferase activity Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 474	474	Siroheme synthase HAMAP MF_01646		PRO_0000330522
Regions
	Region	221 – 464	244	Uroporphyrinogen-III C-methyltransferase HAMAP MF_01646

Sequences

	Sequence		Length	Mass (Da)
	Q606C9-1 [UniParc]. Last modified November 23, 2004. Version 1. Checksum: 5BECC49FE0E26C07	FASTA	474	50,893
	10 20 30 40 50 60 MDYLPIFLKL RDLPCLIVGG GEVAVRKLGL LLDAGAAVTV IAASAEAVIV ELADRGLIRL 70 80 90 100 110 120 RTKVFEATDS EGFRLIIAAT DDRAVNAAVA TAARRHGIPV NVVDCPDLCD FIFPAIIDRS 130 140 150 160 170 180 PVLVAVSTGG ASPVLARQLR TRIETCIPSR FGTLARLAAD LRERVRQAIP EPRARRHFWE 190 200 210 220 230 240 RTLEGPAAEL ALQGRAEDAE RVLLEAADAA ARQERPAWGS VALVGAGPGD PDLLTLRALR 250 260 270 280 290 300 LIQEADVIVY DRLVSAEILA LARRDARRIY AGKERSRHSI PQDDINALLA NLAAEGNRVV 310 320 330 340 350 360 RLKGGDPFIF GRGGEEIETL MACGIPFQVV PGITAASGCA AYAGIPLTHR AHAHACVFVA 370 380 390 400 410 420 GHLKDGTLQD LDWSQLVQPH QTVVVYMGLQ GLPQICAELI RHGAPPSRPA ALIQQGTTRD 430 440 450 460 470 QKVLTATLET LPDKVADAGI KAPTLIIIGE VVGLRKKLAW YRSRQETEGR SGNG

References

[1]

"Genomic insights into methanotrophy: the complete genome sequence of Methylococcus capsulatus (Bath)." Ward N.L., Larsen O., Sakwa J., Bruseth L., Khouri H.M., Durkin A.S., Dimitrov G., Jiang L., Scanlan D., Kang K.H., Lewis M.R., Nelson K.E., Methe B.A., Wu M., Heidelberg J.F., Paulsen I.T., Fouts D.E., Ravel J. , Tettelin H., Ren Q., Read T.D., DeBoy R.T., Seshadri R., Salzberg S.L., Jensen H.B., Birkeland N.K., Nelson W.C., Dodson R.J., Grindhaug S.H., Holt I.E., Eidhammer I., Jonasen I., Vanaken S., Utterback T.R., Feldblyum T.V., Fraser C.M., Lillehaug J.R., Eisen J.A. PLoS Biol. 2:1616-1628(2004) [PubMed: 15383840] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Bath / NCIMB 11132.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE017282 Genomic DNA. Translation: AAU91919.1.
RefSeq	YP_114519.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3103677.
GenomeReviews	Gene locus MCA2089 in contig AE017282_GR.
KEGG	mca:MCA2089.
NMPDR	fig|243233.4.peg.54.
TIGR	MCA2089.
Phylogenomic databases
HOGENOM	Q606C9.
OMA	Q606C9. MCRRDAE.
Enzyme and pathway databases
BioCyc	MCAP243233:MCA_2089-MON.
Family and domain databases
HAMAP	MF_01646. [Tree]
InterPro	IPR000878. 4pyrrol_Mease. IPR014777. 4pyrrole_Mease_sub1. IPR014776. 4pyrrole_Mease_sub2. IPR006366. CobA_cysG_C. IPR016040. NAD(P)-bd_dom. IPR019478. Sirohaem_synthase_dimer_dom. IPR006367. Sirohaem_synthase_N. IPR003043. Uropor_MeTrfase_CS. [Graphical view]
Gene3D	G3DSA:3.40.1010.10. 4pyrrole_Mease_sub1. 1 hit. G3DSA:3.30.950.10. 4pyrrole_Mease_sub2. 1 hit. G3DSA:3.40.50.720. NAD(P)-bd. 1 hit.
Pfam	PF10414. CysG_dimeriser. 1 hit. PF00590. TP_methylase. 1 hit. [Graphical view]
TIGRFAMs	TIGR01469. cobA_cysG_Cterm. 1 hit. TIGR01470. cysG_Nterm. 1 hit.
PROSITE	PS00839. SUMT_1. 1 hit. PS00840. SUMT_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYSG_METCA

Accession

Primary (citable) accession number: Q606C9

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 29, 2008
Last sequence update:	November 23, 2004
Last modified:	June 16, 2009
This is version 34 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)