Reviewed, UniProtKB/Swiss-Prot Q2Y6L7 (CYSG_NITMU)

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:	Nmul_A2313

Organism

Nitrosospira multiformis (strain ATCC 25196 / NCIMB 11849) [Complete proteome] [HAMAP]

Taxonomic identifier

323848 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Betaproteobacteria › Nitrosomonadales › Nitrosomonadaceae › Nitrosospira

Protein attributes

Sequence length	472 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 – 472	472	Siroheme synthase HAMAP MF_01646		PRO_0000330528
Regions
	Region	223 – 465	243	Uroporphyrinogen-III C-methyltransferase HAMAP MF_01646

Sequences

	Sequence		Length	Mass (Da)
	Q2Y6L7-1 [UniParc]. Last modified April 29, 2008. Version 2. Checksum: CE94753D34162C22	FASTA	472	51,911
	10 20 30 40 50 60 MNFLPIFLDI HDRNCVVAGG GEVAARKVAM LLRAGAHVTV VAPRLCSELL EQLNEQSREG 70 80 90 100 110 120 KLAYRAETFQ DEHLADAVLV IAATDDFAVN QRISEAAKRL RIPVNVVDNP GLCSFIMPSI 130 140 150 160 170 180 VDRTPVVVAV SSGGASPVLT RLLRARLETM IPMAYGRLAA YAGEFRDRVK HRFSQPAQRR 190 200 210 220 230 240 RFWERVLQGP FAEMVFAGKD QAAKAWLERE LENETEEPVK GEVYLVGAGP GDPELLTFRA 250 260 270 280 290 300 MRLMQQADVV VYDRLVSPEI LDMLRRDTPR IYAGKERNRH TMPQESINDL LVRLAKEGKR 310 320 330 340 350 360 VLRLKGGDPF IFGRGGEEIE TLAGHGIPFE VVPGITAANG AASYAGIPLT HRDYAQSCIF 370 380 390 400 410 420 VTGHLKDGSV DLDWPMLARP KQTIVVYMGL LGLTVLCKQL IAHGLPNNTP AAIVQQGTTR 430 440 450 460 470 KQRVLAATLE TLPELTAAAH LVPPTLVIVG EVVNLHRKLA WFQPEGNLPG AE

References

[1]

"Complete sequence of chromosome 1 of Nitrosospira multiformis ATCC 25196." Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T., Hammon N., Israni S., Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Lykidis A., Richardson P. Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000103 Genomic DNA. Translation: ABB75604.1. Different initiation.
RefSeq	YP_412996.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3786719.
GenomeReviews	Gene locus Nmul_A2313 in contig CP000103_GR.
KEGG	nmu:Nmul_A2313.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q2Y6L7.
Enzyme and pathway databases
BioCyc	NMUL323848:NMUL_A2313-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. False negative. PS00840. SUMT_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYSG_NITMU

Accession

Primary (citable) accession number: Q2Y6L7

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 29, 2008
Last sequence update:	April 29, 2008
Last modified:	June 16, 2009
This is version 28 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

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