Q3ILQ9 · CYSG_PSET1

Function

function

Multifunctional enzyme that catalyzes the SAM-dependent methylations of uroporphyrinogen III at position C-2 and C-7 to form precorrin-2 via precorrin-1. Then it catalyzes the NAD-dependent ring dehydrogenation of precorrin-2 to yield sirohydrochlorin. Finally, it catalyzes the ferrochelation of sirohydrochlorin to yield siroheme.

Catalytic activity

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-containing compound metabolism; siroheme biosynthesis; precorrin-2 from uroporphyrinogen III: step 1/1.
Porphyrin-containing compound metabolism; siroheme biosynthesis; siroheme from sirohydrochlorin: step 1/1.
Porphyrin-containing compound metabolism; siroheme biosynthesis; sirohydrochlorin from precorrin-2: step 1/1.

Features

Showing features for binding site, active site.

TypeIDPosition(s)Description
Binding site22-23NAD+ (UniProtKB | ChEBI)
Binding site43-44NAD+ (UniProtKB | ChEBI)
Binding site224S-adenosyl-L-methionine (UniProtKB | ChEBI)
Active site247Proton acceptor
Active site269Proton donor
Binding site300-302S-adenosyl-L-methionine (UniProtKB | ChEBI)
Binding site305S-adenosyl-L-methionine (UniProtKB | ChEBI)
Binding site330-331S-adenosyl-L-methionine (UniProtKB | ChEBI)
Binding site382S-adenosyl-L-methionine (UniProtKB | ChEBI)
Binding site411S-adenosyl-L-methionine (UniProtKB | ChEBI)

GO annotations

AspectTerm
Molecular FunctionNAD binding
Molecular Functionprecorrin-2 dehydrogenase activity
Molecular Functionsirohydrochlorin ferrochelatase activity
Molecular Functionuroporphyrin-III C-methyltransferase activity
Biological Processcobalamin biosynthetic process
Biological Processmethylation
Biological Processsiroheme biosynthetic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Siroheme synthase

Including 3 domains:

  • Recommended name
    Uroporphyrinogen-III C-methyltransferase
  • EC number
  • Short names
    Urogen III methylase
  • Alternative names
    • SUMT
    • Uroporphyrinogen III methylase
      (UROM
      )
  • Recommended name
    Precorrin-2 dehydrogenase
  • EC number
  • Recommended name
    Sirohydrochlorin ferrochelatase
  • EC number

Gene names

    • Name
      cysG
    • Ordered locus names
      PSHAa0213

Organism names

Accessions

  • Primary accession
    Q3ILQ9

Proteomes

PTM/Processing

Features

Showing features for chain, modified residue.

TypeIDPosition(s)Description
ChainPRO_00003305321-473Siroheme synthase
Modified residue128Phosphoserine

Keywords

Interaction

Protein-protein interaction databases

Structure

Family & Domains

Features

Showing features for region.

TypeIDPosition(s)Description
Region1-203Precorrin-2 dehydrogenase /sirohydrochlorin ferrochelatase
Region215-473Uroporphyrinogen-III C-methyltransferase

Sequence similarities

In the N-terminal section; belongs to the precorrin-2 dehydrogenase / sirohydrochlorin ferrochelatase family.
In the C-terminal section; belongs to the precorrin methyltransferase family.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    473
  • Mass (Da)
    51,809
  • Last updated
    2005-11-08 v1
  • Checksum
    64D87C039D7900D3
MQYLPIFTKLDNKPVLVVGGGDVALRKCSALLKARASITLVAPKFCQQLIELASENKVTLIHEYFSEQHLKNMMLVIAATDLEHVNSQVFELANAHNIFVNVVDDQPKCTFIFPSIVDRNPITIAISSAGTAPVLARRLREKLETLIPQHIGPLATLVGGFRSKVKQRFKHFADRRQFWEGVFDSSVVSKVQTGDTQAAEQQLEHMLNAKAEPEGEVYVVGAGPGDPELLTLKALQLMQQADVVVYDYLVSDEIMELVRRDADLICVGKRLGDHSVAQQDTNQMLVDLAKQGKKVCRIKGGDPFIYGRGGEEVQVLAANKVNYQIVPGITAAAGCSAYAGIPLTHRDHAQAIQFVTGHCKKDGQELDWQSLAKPNQTLAIYMGVIKSPHIQAELLKHGRNANTPVAIIENGTRKNQRVITGKLGELADLITRNSVVSPALLIIGEVASLHQELHWFGAKAQTSSFAQPLTDVA

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CR954246
EMBL· GenBank· DDBJ
CAI85316.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

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