Reviewed, UniProtKB/Swiss-Prot Q6D1A4 (CYSG1_ERWCT)

Names and origin

Protein names

Recommended name:
    Siroheme synthase 1
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:	cysG1
Ordered Locus Names:	ECA3544

Organism

Erwinia carotovora subsp. atroseptica (Pectobacterium atrosepticum) [Complete proteome] [HAMAP]

Taxonomic identifier

29471 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Pectobacterium

Protein attributes

Sequence length	480 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Multifunctional enzyme that catalyze 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 consist 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. S-adenosyl-L-methionine + precorrin-1 = S-adenosyl-L-homocysteine + precorrin-2. Precorrin-2 + NAD(+) = sirohydrochlorin + NADH. Siroheme + 2 H(+) = sirohydrochlorin + Fe(2+).
Pathway	Cofactor biosynthesis; adenosylcobalamin biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. Cofactor biosynthesis; adenosylcobalamin biosynthesis; sirohydrochlorin from precorrin-2: step 1/1. Porphyrin metabolism; siroheme biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1. Porphyrin metabolism; siroheme biosynthesis; siroheme from sirohydrochlorin: step 1/1. 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 – 480	480	Siroheme synthase 1		PRO_0000330505
Regions
	Region	224 – 464	241	Uroporphyrinogen-III C-methyltransferase

Sequences

	Sequence		Length	Mass (Da)
	Q6D1A4-1 [UniParc]. Last modified August 16, 2004. Version 1. Checksum: 34E423B4160BB316	FASTA	480	51,737
	10 20 30 40 50 60 MNYLPIFADL RQRPVLVVGG GEVATRKIDL LQRAGAEVKI VALALAEPLA AQHQAGQVEW 70 80 90 100 110 120 LAQSFTPELL SGVFLVIAAT DDAELNAAVF EAANQRHLLV NVVDDQPKCT FIFPSIVDRS 130 140 150 160 170 180 PLVVAISSGG QAPVLARLLR EKLESLLPAS LGTMAEIAGS WRDRIKTRLH SMPARRRFWE 190 200 210 220 230 240 RLFVGRFASL VSAGQLEQAE GELQQQLVNQ QDEQQLPAAA RGEVALVGAG PGDAGLLTLR 250 260 270 280 290 300 GLQVMQQADV VLYDHLVSAD VLDLVRRDAE RICVGKRAST HSLPQGEINQ LLVKLAQEGK 310 320 330 340 350 360 RVVRLKGGDP FIFGRGGEEL QAVAQAGITF QVVPGVTAAA GVTAYAGIPL THRDHAQSVI 370 380 390 400 410 420 FITGHCRPDG DSLDWSTLAR GRQTLAIYMG TMKAAEISQQ LIAHGRSAQT PVAVISRGTR 430 440 450 460 470 480 HDQQVQIGTL QELEHLARQA PTPALLVIGE VVDLHHQIAW FGQTTPTVPQ DSRPAVVNLA

References

[1]

"Genome sequence of the enterobacterial phytopathogen Erwinia carotovora subsp. atroseptica and characterization of virulence factors." Bell K.S., Sebaihia M., Pritchard L., Holden M.T.G., Hyman L.J., Holeva M.C., Thomson N.R., Bentley S.D., Churcher L.J.C., Mungall K., Atkin R., Bason N., Brooks K., Chillingworth T., Clark K., Doggett J., Fraser A., Hance Z. , Hauser H., Jagels K., Moule S., Norbertczak H., Ormond D., Price C., Quail M.A., Sanders M., Walker D., Whitehead S., Salmond G.P.C., Birch P.R.J., Parkhill J., Toth I.K. Proc. Natl. Acad. Sci. U.S.A. 101:11105-11110(2004) [PubMed: 15263089] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: SCRI 1043 / ATCC BAA-672.

Cross-references

Sequence databases
EMBLGenBankDDBJ	BX950851 Genomic DNA. Translation: CAG76442.1.
RefSeq	YP_051632.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	2882397.
GenomeReviews	Gene locus ECA3544 in contig BX950851_GR.
KEGG	eca:ECA3544.
NMPDR	fig|218491.3.peg.2190.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q6D1A4.
Enzyme and pathway databases
BioCyc	ECAR218491:ECA3544-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. IPR006367. CysG_synth_N. IPR016040. NAD(P)-bd. 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	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

CYSG1_ERWCT

Accession

Primary (citable) accession number: Q6D1A4

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 29, 2008
Last sequence update:	August 16, 2004
Last modified:	November 25, 2008
This is version 30 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)