D2QU60 · D2QU60_SPILD
- ProteinRiboflavin biosynthesis protein RibBA
- GeneribBA
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids432 (go to sequence)
- Protein existenceInferred from homology
- Annotation score4/5
Function
function
Catalyzes the conversion of D-ribulose 5-phosphate to formate and 3,4-dihydroxy-2-butanone 4-phosphate.
Catalyzes the conversion of GTP to 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate (DARP), formate and pyrophosphate.
Catalytic activity
- D-ribulose 5-phosphate = (2S)-2-hydroxy-3-oxobutyl phosphate + formate + H+
Cofactor
Protein has several cofactor binding sites:
Mn2+ (UniProtKB | Rhea| CHEBI:29035 )
Note: Binds 2 divalent metal cations per subunit. Magnesium or manganese.
Note: Binds 1 zinc ion per subunit.
Pathway
Cofactor biosynthesis; riboflavin biosynthesis; 2-hydroxy-3-oxobutyl phosphate from D-ribulose 5-phosphate: step 1/1.
Cofactor biosynthesis; riboflavin biosynthesis; 5-amino-6-(D-ribitylamino)uracil from GTP: step 1/4.
Features
Showing features for binding site, site, active site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 51-52 | D-ribulose 5-phosphate (UniProtKB | ChEBI) | |||
Binding site | 52 | Mg2+ 1 (UniProtKB | ChEBI) | |||
Binding site | 52 | Mg2+ 2 (UniProtKB | ChEBI) | |||
Binding site | 56 | D-ribulose 5-phosphate (UniProtKB | ChEBI) | |||
Site | 151 | Essential for DHBP synthase activity | |||
Binding site | 165-169 | D-ribulose 5-phosphate (UniProtKB | ChEBI) | |||
Binding site | 168 | Mg2+ 2 (UniProtKB | ChEBI) | |||
Binding site | 189 | D-ribulose 5-phosphate (UniProtKB | ChEBI) | |||
Site | 189 | Essential for DHBP synthase activity | |||
Binding site | 277-281 | GTP (UniProtKB | ChEBI) | |||
Binding site | 282 | Zn2+ (UniProtKB | ChEBI); catalytic | |||
Binding site | 293 | Zn2+ (UniProtKB | ChEBI); catalytic | |||
Binding site | 295 | Zn2+ (UniProtKB | ChEBI); catalytic | |||
Binding site | 298 | GTP (UniProtKB | ChEBI) | |||
Binding site | 320-322 | GTP (UniProtKB | ChEBI) | |||
Binding site | 342 | GTP (UniProtKB | ChEBI) | |||
Active site | 354 | Proton acceptor; for GTP cyclohydrolase activity | |||
Active site | 356 | Nucleophile; for GTP cyclohydrolase activity | |||
Binding site | 377 | GTP (UniProtKB | ChEBI) | |||
Binding site | 382 | GTP (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytosol | |
Molecular Function | 3,4-dihydroxy-2-butanone-4-phosphate synthase activity | |
Molecular Function | GTP binding | |
Molecular Function | GTP cyclohydrolase II activity | |
Molecular Function | magnesium ion binding | |
Molecular Function | manganese ion binding | |
Molecular Function | zinc ion binding | |
Biological Process | riboflavin biosynthetic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameRiboflavin biosynthesis protein RibBA
Including 2 domains:
- Recommended name3,4-dihydroxy-2-butanone 4-phosphate synthase
- EC number
- Short namesDHBP synthase
- Recommended nameGTP cyclohydrolase-2
- EC number
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageBacteria > Bacteroidota > Cytophagia > Cytophagales > Cytophagaceae > Spirosoma
Accessions
- Primary accessionD2QU60
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Interaction
Protein-protein interaction databases
Structure
Family & Domains
Features
Showing features for compositional bias, region, domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Compositional bias | 1-20 | Polar residues | |||
Region | 1-24 | Disordered | |||
Region | 1-226 | DHBP synthase | |||
Region | 227-432 | GTP cyclohydrolase II | |||
Domain | 236-398 | GTP cyclohydrolase II | |||
Sequence similarities
In the C-terminal section; belongs to the GTP cyclohydrolase II family.
In the N-terminal section; belongs to the DHBP synthase family.
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length432
- Mass (Da)47,621
- Last updated2010-03-02 v1
- Checksum2103DF9F08ED4892
Features
Showing features for compositional bias.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Compositional bias | 1-20 | Polar residues | |||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
CP001769 EMBL· GenBank· DDBJ | ADB42342.1 EMBL· GenBank· DDBJ | Genomic DNA |