A0A4R8H0E2 · A0A4R8H0E2_9FIRM

  • 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.

Caution

The sequence shown here is derived from an EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is preliminary data.

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 site27-28D-ribulose 5-phosphate (UniProtKB | ChEBI)
Binding site28Mg2+ 1 (UniProtKB | ChEBI)
Binding site28Mg2+ 2 (UniProtKB | ChEBI)
Binding site32D-ribulose 5-phosphate (UniProtKB | ChEBI)
Site125Essential for DHBP synthase activity
Binding site139-143D-ribulose 5-phosphate (UniProtKB | ChEBI)
Binding site142Mg2+ 2 (UniProtKB | ChEBI)
Binding site163D-ribulose 5-phosphate (UniProtKB | ChEBI)
Site163Essential for DHBP synthase activity
Binding site251-255GTP (UniProtKB | ChEBI)
Binding site256Zn2+ (UniProtKB | ChEBI); catalytic
Binding site267Zn2+ (UniProtKB | ChEBI); catalytic
Binding site269Zn2+ (UniProtKB | ChEBI); catalytic
Binding site272GTP (UniProtKB | ChEBI)
Binding site294-296GTP (UniProtKB | ChEBI)
Binding site316GTP (UniProtKB | ChEBI)
Active site328Proton acceptor; for GTP cyclohydrolase activity
Active site330Nucleophile; for GTP cyclohydrolase activity
Binding site351GTP (UniProtKB | ChEBI)
Binding site356GTP (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
      C7959_105106

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • MSL 6dP
  • Taxonomic lineage
    Bacteria > Bacillota > Clostridia > Halanaerobiales > Halobacteroidaceae > Orenia

Accessions

  • Primary accession
    A0A4R8H0E2

Proteomes

Subcellular Location

Interaction

Protein-protein interaction databases

Family & Domains

Features

Showing features for region, domain.

Type
IDPosition(s)Description
Region1-200DHBP synthase
Region201-403GTP cyclohydrolase II
Domain210-372GTP 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
    403
  • Mass (Da)
    45,035
  • Last updated
    2019-07-31 v1
  • Checksum
    FF23FBBC9D34E8D6
MKFNTIEEAIEDIKAAKMIVVVDDEDRENEGDLLMAAEHATPESINFMATYGRGLICLPTTKQRLEELSLSQMVEENTDSHETAFTVSIDHKDTSTGISAFERSKTIQAVVDPKTEPSDLARPGHIFPLMAKEGGVLRRAGHTEAAIDLARLAGSYPAGVICEIMSDDGTMARVPELIEFAQKHNLKIITIEDLIKYRMNKDTLVKRLPEVDLPSKFGNFNVIGYETEIDDKCHLAIIKGDIKDKEDVLVRVHSECLTGDALGSLRCDCRDQLAAALKRIEEEGEGIVLYMRQEGRGIGLANKLRAYHLQDEGRDTVEANRELGFDDDMRDYGIGAQILSDLGLTSIRLMTNNPRKIVGLEGYGLKISERVPHQMEANCVNKRYLSTKREKLGHMLENNFDNE

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
SOEG01000005
EMBL· GenBank· DDBJ
TDX52751.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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