ID A0A1Y5JUH4_9GAMM Unreviewed; 207 AA.
AC A0A1Y5JUH4;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 27-MAR-2024, entry version 19.
DE RecName: Full=GTP cyclohydrolase II {ECO:0000256|ARBA:ARBA00012762};
DE EC=3.5.4.25 {ECO:0000256|ARBA:ARBA00012762};
GN ORFNames=B5G52_16745 {ECO:0000313|EMBL:OUS69542.1};
OS Pseudoalteromonas sp. A601.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Alteromonadales;
OC Pseudoalteromonadaceae; Pseudoalteromonas.
OX NCBI_TaxID=1967839 {ECO:0000313|EMBL:OUS69542.1, ECO:0000313|Proteomes:UP000196208};
RN [1] {ECO:0000313|EMBL:OUS69542.1, ECO:0000313|Proteomes:UP000196208}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=A601 {ECO:0000313|EMBL:OUS69542.1,
RC ECO:0000313|Proteomes:UP000196208};
RA Cheng Y., Li J.G., Liu H., Han W.J.;
RT "Draft Genome of a Polysaccharide-Degrading Marine Bacterium
RT Pseudoalteromonas sp. A601.";
RL Submitted (MAR-2017) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the conversion of GTP to 2,5-diamino-6-
CC ribosylamino-4(3H)-pyrimidinone 5'-phosphate (DARP), formate and
CC pyrophosphate. {ECO:0000256|ARBA:ARBA00043932}.
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; 5-amino-6-(D-
CC ribitylamino)uracil from GTP: step 1/4.
CC {ECO:0000256|ARBA:ARBA00004853}.
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:OUS69542.1}.
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DR EMBL; MXQF01000024; OUS69542.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y5JUH4; -.
DR OrthoDB; 9793111at2; -.
DR UniPathway; UPA00275; -.
DR Proteomes; UP000196208; Unassembled WGS sequence.
DR GO; GO:0005525; F:GTP binding; IEA:UniProtKB-KW.
DR GO; GO:0003935; F:GTP cyclohydrolase II activity; IEA:InterPro.
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; 3.40.50.10990; GTP cyclohydrolase II; 1.
DR InterPro; IPR032677; GTP_cyclohydro_II.
DR InterPro; IPR000926; RibA.
DR InterPro; IPR036144; RibA-like_sf.
DR PANTHER; PTHR21327:SF18; 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE; 1.
DR PANTHER; PTHR21327; GTP CYCLOHYDROLASE II-RELATED; 1.
DR Pfam; PF00925; GTP_cyclohydro2; 1.
DR SUPFAM; SSF142695; RibA-like; 1.
PE 4: Predicted;
KW GTP-binding {ECO:0000256|ARBA:ARBA00023134};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000313|EMBL:OUS69542.1};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619}.
FT DOMAIN 21..169
FT /note="GTP cyclohydrolase II"
FT /evidence="ECO:0000259|Pfam:PF00925"
SQ SEQUENCE 207 AA; 22796 MW; 4F6CBD79C79C0CB6 CRC64;
MAQVRARVQL NVGKNSDIPA EIISFSGLND GQEHVALVFN NADSKQPVPL IRMHSECLTG
DVFHSSRCDC GEQLNECIEM MHEQGGILLY LRQEGRGIGL YNKIDAYVLQ SQGMNTYEAN
NHLGFADDLR DFSDAVLMLE AMGLTHVKLM TNNPKKLNAL KDAGIEVDSV IGTHAHIKAG
VAGNKSYLET KIKHGAHMLD IKKVKKP
//
