ID Q013N2_OSTTA Unreviewed; 432 AA.
AC Q013N2;
DT 14-NOV-2006, integrated into UniProtKB/TrEMBL.
DT 14-NOV-2006, sequence version 1.
DT 24-JAN-2024, entry version 88.
DE SubName: Full=3,4-dihydroxy-2-butanone 4-phosphate synthase,RibB {ECO:0000313|EMBL:CAL54897.1};
GN ORFNames=OT_ostta08g01610 {ECO:0000313|EMBL:CAL54897.1};
OS Ostreococcus tauri.
OC Eukaryota; Viridiplantae; Chlorophyta; Mamiellophyceae; Mamiellales;
OC Bathycoccaceae; Ostreococcus.
OX NCBI_TaxID=70448 {ECO:0000313|EMBL:CAL54897.1, ECO:0000313|Proteomes:UP000009170};
RN [1] {ECO:0000313|Proteomes:UP000009170}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=OTTH0595 {ECO:0000313|Proteomes:UP000009170};
RX PubMed=16868079; DOI=10.1073/pnas.0604795103;
RA Derelle E., Ferraz C., Rombauts S., Rouze P., Worden A.Z., Robbens S.,
RA Partensky F., Degroeve S., Echeynie S., Cooke R., Saeys Y., Wuyts J.,
RA Jabbari K., Bowler C., Panaud O., Piegu B., Ball S.G., Ral J.-P.,
RA Bouget F.-Y., Piganeau G., De Baets B., Picard A., Delseny M., Demaille J.,
RA Van de Peer Y., Moreau H.;
RT "Genome analysis of the smallest free-living eukaryote Ostreococcus tauri
RT unveils many unique features.";
RL Proc. Natl. Acad. Sci. U.S.A. 103:11647-11652(2006).
CC -!- CATALYTIC ACTIVITY:
CC Reaction=GTP + 4 H2O = 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-
CC pyrimidine + formate + 3 H(+) + 2 phosphate; Xref=Rhea:RHEA:23704,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:15740,
CC ChEBI:CHEBI:37565, ChEBI:CHEBI:43474, ChEBI:CHEBI:58614; EC=3.5.4.25;
CC Evidence={ECO:0000256|ARBA:ARBA00029293};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947};
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; 2-hydroxy-3-
CC oxobutyl phosphate from D-ribulose 5-phosphate: step 1/1.
CC {ECO:0000256|ARBA:ARBA00004904}.
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; 5-amino-6-(D-
CC ribitylamino)uracil from GTP: step 1/4.
CC {ECO:0000256|ARBA:ARBA00004853}.
CC -!- SIMILARITY: In the C-terminal section; belongs to the GTP
CC cyclohydrolase II family. {ECO:0000256|ARBA:ARBA00008976}.
CC -!- SIMILARITY: In the N-terminal section; belongs to the DHBP synthase
CC family. {ECO:0000256|ARBA:ARBA00005520}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:CAL54897.1}.
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DR EMBL; CAID01000008; CAL54897.1; -; Genomic_DNA.
DR RefSeq; XP_003080729.1; XM_003080681.1.
DR AlphaFoldDB; Q013N2; -.
DR STRING; 70448.Q013N2; -.
DR GeneID; 9831380; -.
DR KEGG; ota:OT_ostta08g01610; -.
DR InParanoid; Q013N2; -.
DR OMA; GGVHMAM; -.
DR OrthoDB; 5489599at2759; -.
DR UniPathway; UPA00275; UER00400.
DR Proteomes; UP000009170; Chromosome 8.
DR GO; GO:0008686; F:3,4-dihydroxy-2-butanone-4-phosphate synthase activity; IEA:InterPro.
DR GO; GO:0005525; F:GTP binding; IEA:UniProtKB-KW.
DR GO; GO:0003935; F:GTP cyclohydrolase II activity; IEA:UniProtKB-EC.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd00641; GTP_cyclohydro2; 1.
DR Gene3D; 3.90.870.10; DHBP synthase; 1.
DR Gene3D; 3.40.50.10990; GTP cyclohydrolase II; 1.
DR HAMAP; MF_00179; RibA; 1.
DR HAMAP; MF_00180; RibB; 1.
DR HAMAP; MF_01283; RibBA; 1.
DR InterPro; IPR017945; DHBP_synth_RibB-like_a/b_dom.
DR InterPro; IPR000422; DHBP_synthase_RibB.
DR InterPro; IPR032677; GTP_cyclohydro_II.
DR InterPro; IPR000926; RibA.
DR InterPro; IPR036144; RibA-like_sf.
DR InterPro; IPR016299; Riboflavin_synth_RibBA.
DR NCBIfam; TIGR00505; ribA; 1.
DR NCBIfam; TIGR00506; ribB; 1.
DR PANTHER; PTHR21327:SF18; 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE; 1.
DR PANTHER; PTHR21327; GTP CYCLOHYDROLASE II-RELATED; 1.
DR Pfam; PF00926; DHBP_synthase; 1.
DR Pfam; PF00925; GTP_cyclohydro2; 1.
DR PIRSF; PIRSF001259; RibA; 1.
DR SUPFAM; SSF142695; RibA-like; 1.
DR SUPFAM; SSF55821; YrdC/RibB; 1.
PE 3: Inferred from homology;
KW GTP-binding {ECO:0000256|ARBA:ARBA00023134};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801};
KW Lyase {ECO:0000256|ARBA:ARBA00023239};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842};
KW Manganese {ECO:0000256|ARBA:ARBA00023211};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Multifunctional enzyme {ECO:0000256|ARBA:ARBA00023268};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Reference proteome {ECO:0000313|Proteomes:UP000009170};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619};
KW Zinc {ECO:0000256|ARBA:ARBA00022833}.
FT DOMAIN 219..391
FT /note="GTP cyclohydrolase II"
FT /evidence="ECO:0000259|Pfam:PF00925"
SQ SEQUENCE 432 AA; 46943 MW; 47888E28E5CE71E3 CRC64;
MDGDADAPTD GFASVEDALE EVRRGRFVVV LDDEDRENEG DLIGAADKMT AASMAFMIRH
TSGLVCVSLE EDRADALDLP LMVDSKSNKD AMKTAFTVSV DLATSTTGIS AGERAATINA
LGAEETTANA FVRPGHVFPL RYKAGGVLKR AGHTEAAVDL ARMAGCSPVG VLCEIVNDDD
GSMARLPQLK VFAEKHGLKM VLIKDMIRYR RAREKLVERT AVARLPTEWG NFTCVSYKNT
LDGIEHVALL YGEYDHDVAS AIGPDMLVRV HSECLTGDIF KSARCDCGNQ LDLAMQRVAK
EGQGCIVYLR GQEGRGIGLG HKLRAYNLQD EGRDTVQANE DLGFPADSRE YGVGAQILQD
LGVTSLRLMT NNPAKYHGLS GYGLKVTGRV PLFAPITMEN KRYIDAKRMK MGHLFDALPT
LSVEAQAENP TR
//