Reviewed, UniProtKB/Swiss-Prot A4VLU6 (CYSG_PSEU5)

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:	PST_2288

Organism

Pseudomonas stutzeri (strain A1501) [Complete proteome] [HAMAP]

Taxonomic identifier

379731 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Pseudomonadales › Pseudomonadaceae › Pseudomonas

Protein attributes

Sequence length	465 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 – 465	465	Siroheme synthase		PRO_0000330542
Regions
	Region	218 – 460	243	Uroporphyrinogen-III C-methyltransferase

Sequences

	Sequence		Length	Mass (Da)
	A4VLU6-1 [UniParc]. Last modified April 29, 2008. Version 2. Checksum: 55ED316A54895278	FASTA	465	49,692
	10 20 30 40 50 60 MEYLPLFHNL KGRTVLIVGG GEIALRKARL LSEAGARLRV VAPSIEAQLV ELVQAGAGEC 70 80 90 100 110 120 LDRGYARQDL QGCVLAIAAT DDEPLNATVS QHANALGVPV NVVDSPQLCS VIFPAIVDRS 130 140 150 160 170 180 PLVVAVSSGG DAPVLARLIR ARIETWIPAA YGQLAGLAKQ FRAQVKARFA NVQQRRVFWE 190 200 210 220 230 240 EVFQGPIAEQ ALAGRTAEAE RLLAEKLAGV APKALGEVYL VGAGPGDPDL LTFRALRLMQ 250 260 270 280 290 300 QADVVLYDRL VAPAIIDLCR RDADRIYVGK QRADHAVPQE QINQQLVTLA KQGKRVLRLK 310 320 330 340 350 360 GGDPFIFGRG GEEIEELAAH GVPFQVVPGI TAASGCAAYA GIPLTHRDHA QSVRFVTGHL 370 380 390 400 410 420 KDGSCDLPWS ELAAPAQTLV FYMGLVGLPV ICQQLIAHGR SAETPAALVQ QGTTSNQRVF 430 440 450 460 TATLGTLAGR IAQEDVQAPT LLIVGEVVQL REKLAWFEGA QAAGR

References

[1]

"Complete genome sequence of the metabolically versatile and root-associated nitrogen-fixing bacterium Pseudomonas stutzeri A1501." Yan Y., Yang J., Dou Y., Ping S., Chen M., Yao Z., Li H., Lu W., Zhang W., Peng J., Liu W., He S., Geng L., Zhang X., Yang F., Li D., Lin Z., Wang Y. , Elmerich C., Lin M., Jin Q. Submitted (APR-2006) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000304 Genomic DNA. Translation: ABP79947.1. Different initiation.
RefSeq	YP_001172789.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	5098368.
GenomeReviews	Gene locus PST_2288 in contig CP000304_GR.
KEGG	psa:PST_2288.
Organism-specific databases
CMR	Search...
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. False negative. PS00840. SUMT_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYSG_PSEU5

Accession

Primary (citable) accession number: A4VLU6

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 29, 2008
Last sequence update:	April 29, 2008
Last modified:	November 25, 2008
This is version 17 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)