ID   QUED_METTH              Reviewed;         161 AA.
AC   O27296;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   03-AUG-2022, entry version 121.
DE   RecName: Full=Putative 6-carboxy-5,6,7,8-tetrahydropterin synthase;
DE            Short=CPH4 synthase;
DE            EC=4.1.2.50;
DE   AltName: Full=Archaeosine biosynthesis protein QueD;
GN   Name=queD; OrderedLocusNames=MTH_1228;
OS   Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM
OS   10044 / NBRC 100330 / Delta H) (Methanobacterium thermoautotrophicum).
OC   Archaea; Euryarchaeota; Methanomada group; Methanobacteria;
OC   Methanobacteriales; Methanobacteriaceae; Methanothermobacter.
OX   NCBI_TaxID=187420;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H;
RX   PubMed=9371463; DOI=10.1128/jb.179.22.7135-7155.1997;
RA   Smith D.R., Doucette-Stamm L.A., Deloughery C., Lee H.-M., Dubois J.,
RA   Aldredge T., Bashirzadeh R., Blakely D., Cook R., Gilbert K., Harrison D.,
RA   Hoang L., Keagle P., Lumm W., Pothier B., Qiu D., Spadafora R., Vicare R.,
RA   Wang Y., Wierzbowski J., Gibson R., Jiwani N., Caruso A., Bush D.,
RA   Safer H., Patwell D., Prabhakar S., McDougall S., Shimer G., Goyal A.,
RA   Pietrovski S., Church G.M., Daniels C.J., Mao J.-I., Rice P., Noelling J.,
RA   Reeve J.N.;
RT   "Complete genome sequence of Methanobacterium thermoautotrophicum deltaH:
RT   functional analysis and comparative genomics.";
RL   J. Bacteriol. 179:7135-7155(1997).
CC   -!- FUNCTION: Catalyzes the conversion of 7,8-dihydroneopterin triphosphate
CC       (H2NTP) to 6-carboxy-5,6,7,8-tetrahydropterin (CPH4) and acetaldehyde.
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=7,8-dihydroneopterin 3'-triphosphate + H2O = 6-carboxy-
CC         5,6,7,8-tetrahydropterin + acetaldehyde + 2 H(+) + triphosphate;
CC         Xref=Rhea:RHEA:27966, ChEBI:CHEBI:15343, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:18036, ChEBI:CHEBI:58462,
CC         ChEBI:CHEBI:61032; EC=4.1.2.50;
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000250};
CC   -!- PATHWAY: Purine metabolism; 7-cyano-7-deazaguanine biosynthesis.
CC   -!- MISCELLANEOUS: The active site is at the interface between 2 subunits.
CC       The proton acceptor Cys is on one subunit, and the charge relay system
CC       is on the other subunit (By similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PTPS family. QueD subfamily. {ECO:0000305}.
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DR   EMBL; AE000666; AAB85717.1; -; Genomic_DNA.
DR   PIR; A69031; A69031.
DR   AlphaFoldDB; O27296; -.
DR   SMR; O27296; -.
DR   STRING; 187420.MTH_1228; -.
DR   EnsemblBacteria; AAB85717; AAB85717; MTH_1228.
DR   KEGG; mth:MTH_1228; -.
DR   PATRIC; fig|187420.15.peg.1206; -.
DR   HOGENOM; CLU_111016_3_0_2; -.
DR   OMA; IGQGACY; -.
DR   UniPathway; UPA00391; -.
DR   Proteomes; UP000005223; Chromosome.
DR   GO; GO:0070497; F:6-carboxy-5,6,7,8-tetrahydropterin synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   Gene3D; 3.30.479.10; -; 1.
DR   InterPro; IPR007115; 6-PTP_synth/QueD.
DR   InterPro; IPR038418; 6-PTP_synth/QueD_sf.
DR   PANTHER; PTHR12589; PTHR12589; 1.
DR   Pfam; PF01242; PTPS; 1.
DR   PIRSF; PIRSF006113; PTP_synth; 1.
DR   TIGRFAMs; TIGR00039; 6PTHBS; 1.
PE   3: Inferred from homology;
KW   Lyase; Metal-binding; Reference proteome; Zinc.
FT   CHAIN           1..161
FT                   /note="Putative 6-carboxy-5,6,7,8-tetrahydropterin
FT                   synthase"
FT                   /id="PRO_0000057932"
FT   ACT_SITE        29
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        73
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        149
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000250"
FT   BINDING         21
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
FT   BINDING         33
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
FT   BINDING         35
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   161 AA;  18062 MW;  0A6665F880F63108 CRC64;
     MVMMKIVING IHANLRFSAA HMIPEHESCG CIHGHSYIVD VKVEGKRSGK HGFVADFKDV
     KDIVRRICSE FDHKLLIPLR NPLINFTSTT RTVKFEIAGK KYSIPEEDCC LMDLESSSAE
     ELSRYFAATL FKELSSKYDI SSVEVCVNEG IGQGAIYTIS R