A0A518IVY6 · A0A518IVY6_9BACT

  • Protein
    Riboflavin biosynthesis protein RibBA
  • Gene
    ribBA
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    4/5

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

Cofactor

Protein has several cofactor binding sites:
Mg2+ (UniProtKB | Rhea| CHEBI:18420 )

Mn2+ (UniProtKB | Rhea| CHEBI:29035 )

Note: Binds 2 divalent metal cations per subunit. Magnesium or manganese.
Mn2+ (UniProtKB | Rhea| CHEBI:29035 )

Zn2+ (UniProtKB | Rhea| CHEBI:29105 )

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
IDPosition(s)Description
Binding site29-30D-ribulose 5-phosphate (UniProtKB | ChEBI)
Binding site30Mg2+ 2 (UniProtKB | ChEBI)
Binding site30Mg2+ 1 (UniProtKB | ChEBI)
Binding site34D-ribulose 5-phosphate (UniProtKB | ChEBI)
Site126Essential for DHBP synthase activity
Binding site140-144D-ribulose 5-phosphate (UniProtKB | ChEBI)
Binding site143Mg2+ 2 (UniProtKB | ChEBI)
Binding site164D-ribulose 5-phosphate (UniProtKB | ChEBI)
Site164Essential for DHBP synthase activity
Binding site254-258GTP (UniProtKB | ChEBI)
Binding site259Zn2+ (UniProtKB | ChEBI); catalytic
Binding site270Zn2+ (UniProtKB | ChEBI); catalytic
Binding site272Zn2+ (UniProtKB | ChEBI); catalytic
Binding site275GTP (UniProtKB | ChEBI)
Binding site297-299GTP (UniProtKB | ChEBI)
Binding site319GTP (UniProtKB | ChEBI)
Active site331Proton acceptor; for GTP cyclohydrolase activity
Active site333Nucleophile; for GTP cyclohydrolase activity
Binding site354GTP (UniProtKB | ChEBI)
Binding site359GTP (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentcytosol
Molecular Function3,4-dihydroxy-2-butanone-4-phosphate synthase activity
Molecular FunctionGTP binding
Molecular FunctionGTP cyclohydrolase II activity
Molecular Functionmagnesium ion binding
Molecular Functionmanganese ion binding
Molecular Functionzinc ion binding
Biological Processriboflavin biosynthetic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Riboflavin biosynthesis protein RibBA

Including 2 domains:

  • Recommended name
    3,4-dihydroxy-2-butanone 4-phosphate synthase
  • EC number
  • Short names
    DHBP synthase
  • Recommended name
    GTP cyclohydrolase-2
  • EC number
  • Alternative names
    • GTP cyclohydrolase II

Gene names

    • Name
      ribBA
    • ORF names
      Mal33_32560

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • Mal33
  • Taxonomic lineage
    Bacteria > Planctomycetota > Planctomycetia > Pirellulales > Pirellulaceae > Rosistilla

Accessions

  • Primary accession
    A0A518IVY6

Proteomes

Subcellular Location

Family & Domains

Features

Showing features for region, domain.

Type
IDPosition(s)Description
Region1-201DHBP synthase
Region202-410GTP cyclohydrolase II
Domain208-377GTP 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.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    410
  • Mass (Da)
    44,932
  • Last updated
    2019-10-16 v1
  • Checksum
    10F5764B9A6F06D6
MSSPFNSVPEAVDAIARGEIVIVLDAENRENEGDYICAAEKASIENVNFMLSGRGQLCVAVLPDVCNRLDLHPLVERNDAPLKTAFQTPVDHRNAKTGITAAERSETIQALIQPHSHAEDFVRPGHVYPLLAKEGGVLRRAGHTEAAVDLARMAGLEPAGALCEVLNESGDRATRDDLLALAKKHNLKIITIEELIAHRRVNEKLVSRNAQADLPTSFGDFKIIVYDVQFEDQEPIALVYGDLASQDGPPPLVRMHSSCFTGDLVDSLRCDCGDQLKMALKVISSEGRGALVYLPQEGRGIGLAQKIRAYALQDQGLDTVEANHALGFKADMRDYGIGLQILKDLGLREVRLLTNNPKKTEAFNLRGFDLQVVDQVPIISESNVHNARYLQTKRDKMGHQLPSDPVESAE

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CP036318
EMBL· GenBank· DDBJ
QDV57252.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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