ID G7WJY8_METH6 Unreviewed; 405 AA.
AC G7WJY8;
DT 25-JAN-2012, integrated into UniProtKB/TrEMBL.
DT 25-JAN-2012, sequence version 1.
DT 27-MAR-2024, entry version 61.
DE RecName: Full=GTP cyclohydrolase II {ECO:0000256|ARBA:ARBA00012762};
DE EC=3.5.4.25 {ECO:0000256|ARBA:ARBA00012762};
GN OrderedLocusNames=Mhar_0036 {ECO:0000313|EMBL:AET63429.1};
OS Methanothrix harundinacea (strain 6Ac) (Methanosaeta harundinacea).
OC Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC Methanotrichales; Methanotrichaceae; Methanothrix.
OX NCBI_TaxID=1110509 {ECO:0000313|EMBL:AET63429.1, ECO:0000313|Proteomes:UP000005877};
RN [1] {ECO:0000313|EMBL:AET63429.1, ECO:0000313|Proteomes:UP000005877}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=6Ac {ECO:0000313|EMBL:AET63429.1,
RC ECO:0000313|Proteomes:UP000005877};
RX PubMed=22590603; DOI=10.1371/journal.pone.0036756;
RA Zhu J., Zheng H., Ai G., Zhang G., Liu D., Liu X., Dong X.;
RT "The genome characteristics and predicted function of methyl-group
RT oxidation pathway in the obligate aceticlastic methanogens, Methanosaeta
RT spp.";
RL PLoS ONE 7:E36756-E36756(2012).
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 -!- SIMILARITY: In the N-terminal section; belongs to the DHBP synthase
CC family. {ECO:0000256|ARBA:ARBA00005520}.
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DR EMBL; CP003117; AET63429.1; -; Genomic_DNA.
DR RefSeq; WP_014585618.1; NC_017527.1.
DR AlphaFoldDB; G7WJY8; -.
DR STRING; 1110509.Mhar_0036; -.
DR GeneID; 12509205; -.
DR KEGG; mhi:Mhar_0036; -.
DR PATRIC; fig|1110509.7.peg.37; -.
DR HOGENOM; CLU_020273_1_2_2; -.
DR OrthoDB; 25735at2157; -.
DR UniPathway; UPA00275; UER00400.
DR Proteomes; UP000005877; Chromosome.
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, ECO:0000313|EMBL:AET63429.1};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Reference proteome {ECO:0000313|Proteomes:UP000005877};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619}.
FT DOMAIN 209..373
FT /note="GTP cyclohydrolase II"
FT /evidence="ECO:0000259|Pfam:PF00925"
SQ SEQUENCE 405 AA; 44450 MW; 3E0C0BC06D72ABA5 CRC64;
MPFCSVEEAI EEVRAGRFIL VLDDEGRENE GDLVMAAEKV TPEAINFMAK HARGLICVPL
SGERVGELSL PLMTQNNTEK MGTAFTVSVD AKGRGVTTGI SAFDRAETVR TLIDPAATLN
DLVMPGHTFP LRAQDGGVLR RAGHTEASVD LARMAGLYPA AVICEVMAED GTMARLPELE
RFAAEHGLKM LTIDRLIKRR MRSEKLVRRI AEVSLPTDYG DFRAIGYESL VDGQCHLALV
AGDPSSDDAL VRVHSECLTG DVFGSRRCDC GDQLHLAMRM IADSGNGVLL YMRQEGRGIG
LANKLRAYAL QERGYDTVEA NHRLGYPADL RDYGVGAQIL VDLGIKRMRL LTNNPRKIVG
LEGYGLEIVD RAPIEIPPND KNRKYLETKR DKLHHLLLQE GSGNG
//
