A0A252D722 · A0A252D722_9NOSO
- ProteinAcireductone dioxygenase
- GenemtnD
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids184 (go to sequence)
- Protein existenceInferred from homology
- Annotation score4/5
Function
function
Catalyzes 2 different reactions between oxygene and the acireductone 1,2-dihydroxy-3-keto-5-methylthiopentene (DHK-MTPene) depending upon the metal bound in the active site. Fe-containing acireductone dioxygenase (Fe-ARD) produces formate and 2-keto-4-methylthiobutyrate (KMTB), the alpha-ketoacid precursor of methionine in the methionine recycle pathway. Ni-containing acireductone dioxygenase (Ni-ARD) produces methylthiopropionate, carbon monoxide and formate, and does not lie on the methionine recycle pathway.
Catalytic activity
- 1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + O2 = 3-(methylsulfanyl)propanoate + CO + formate + 2 H+
Cofactor
Protein has several cofactor binding sites:
Note: Binds 1 Fe2+ cation per monomer.
Note: Binds 1 nickel ion per monomer.
Pathway
Amino-acid biosynthesis; L-methionine biosynthesis via salvage pathway; L-methionine from S-methyl-5-thio-alpha-D-ribose 1-phosphate: step 5/6.
Features
Showing features for binding site, site.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Binding site | 100 | Fe2+ (UniProtKB | ChEBI) | ||||
Sequence: H | ||||||
Binding site | 100 | Ni2+ (UniProtKB | ChEBI) | ||||
Sequence: H | ||||||
Binding site | 102 | Fe2+ (UniProtKB | ChEBI) | ||||
Sequence: H | ||||||
Binding site | 102 | Ni2+ (UniProtKB | ChEBI) | ||||
Sequence: H | ||||||
Site | 105 | May play a role in transmitting local conformational changes | ||||
Sequence: D | ||||||
Binding site | 106 | Fe2+ (UniProtKB | ChEBI) | ||||
Sequence: E | ||||||
Binding site | 106 | Ni2+ (UniProtKB | ChEBI) | ||||
Sequence: E | ||||||
Site | 108 | Important to generate the dianion | ||||
Sequence: R | ||||||
Binding site | 145 | Fe2+ (UniProtKB | ChEBI) | ||||
Sequence: H | ||||||
Binding site | 145 | Ni2+ (UniProtKB | ChEBI) | ||||
Sequence: H |
GO annotations
Aspect | Term | |
---|---|---|
Molecular Function | acireductone dioxygenase (Ni2+-requiring) activity | |
Molecular Function | acireductone dioxygenase [iron(II)-requiring] activity | |
Molecular Function | iron ion binding | |
Molecular Function | nickel cation binding | |
Biological Process | L-methionine salvage from methylthioadenosine | |
Biological Process | L-methionine salvage from S-adenosylmethionine |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameAcireductone dioxygenase
- Alternative names
Gene names
Organism names
- Organism
- Strain
- Taxonomic lineageBacteria > Cyanobacteriota > Cyanophyceae > Nostocales > Nostocaceae > Nostoc
Accessions
- Primary accessionA0A252D722
Proteomes
Interaction
Subunit
Monomer.
Structure
Sequence
- Sequence statusComplete
- Length184
- Mass (Da)21,162
- Last updated2017-11-22 v1
- Checksum53A616A6E860AD25
Keywords
- Technical term