Reviewed, UniProtKB/Swiss-Prot Q48H75 (CYSG_PSE14)

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:	PSPPH_3088

Organism

Pseudomonas syringae pv. phaseolicola (strain 1448A / Race 6) [Complete proteome] [HAMAP]

Taxonomic identifier

264730 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Pseudomonadales › Pseudomonadaceae › Pseudomonas

Protein attributes

Sequence length	464 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 – 464	464	Siroheme synthase HAMAP MF_01646		PRO_0000330543
Regions
	Region	218 – 460	243	Uroporphyrinogen-III C-methyltransferase HAMAP MF_01646

Sequences

	Sequence		Length	Mass (Da)
	Q48H75-1 [UniParc]. Last modified September 13, 2005. Version 1. Checksum: 40D2232C497E6EDA	FASTA	464	50,022
	10 20 30 40 50 60 MEFLPLFHNL RGSRVLVVGG GEIALRKSRL IADAGAVLRV VAPEIEAQLS ELVVQSGGEM 70 80 90 100 110 120 ILRGYSESDL DGCVLIIAAT DDEPLNAQVS HDARLRCVPV NVVDAPALCT VIFPAIVDRS 130 140 150 160 170 180 PLVIAVSSGG DAPVLARLIR AKLETWIPST YGQLAGLAAR FRNQVKGLFP NVQQRRAFWE 190 200 210 220 230 240 DVFQGAIADR QLAGQGAEAE RLLIAKIAGE PPPETGEVYL VGAGPGDPDL LTFRALRLMQ 250 260 270 280 290 300 QADVVLYDRL VAPTILDLCR RDAERVYVGK RRAEHAVPQE QINQQLVALA KQGKRVVRLK 310 320 330 340 350 360 GGDPFIFGRG GEEIEELAVH GIPFQVVPGI TAASGCAAYA GIPLTHRDHA QSVRFITGHL 370 380 390 400 410 420 KDGTTDLPWS DLVAPAQTLV FYMGLIGLPV ICEELIRHGR SADTPAALVQ QGTTVNQRVF 430 440 450 460 TGTLANLPQL VAEHEVHAPT LVIIGEVVKL REKLAWFEGA QATV

References

[1]

"Whole-genome sequence analysis of Pseudomonas syringae pv. phaseolicola 1448A reveals divergence among pathovars in genes involved in virulence and transposition." Joardar V., Lindeberg M., Jackson R.W., Selengut J., Dodson R., Brinkac L.M., Daugherty S.C., DeBoy R.T., Durkin A.S., Gwinn Giglio M., Madupu R., Nelson W.C., Rosovitz M.J., Sullivan S.A., Crabtree J., Creasy T., Davidsen T.M., Haft D.H. , Zafar N., Zhou L., Halpin R., Holley T., Khouri H.M., Feldblyum T.V., White O., Fraser C.M., Chatterjee A.K., Cartinhour S., Schneider D., Mansfield J.W., Collmer A., Buell R. J. Bacteriol. 187:6488-6498(2005) [PubMed: 16159782] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000058 Genomic DNA. Translation: AAZ35170.1.
RefSeq	YP_275258.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3557746.
GenomeReviews	Gene locus PSPPH_3088 in contig CP000058_GR.
KEGG	psp:PSPPH_3088.
NMPDR	fig|264730.3.peg.3461.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q48H75.
OMA	Q48H75. TTVVYMP.
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_PSE14

Accession

Primary (citable) accession number: Q48H75

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 29, 2008
Last sequence update:	September 13, 2005
Last modified:	June 16, 2009
This is version 29 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)