ID   THIG_AROAE              Reviewed;         261 AA.
AC   Q5P5J1;
DT   19-JUL-2005, integrated into UniProtKB/Swiss-Prot.
DT   04-JAN-2005, sequence version 1.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Thiazole synthase {ECO:0000255|HAMAP-Rule:MF_00443};
DE            EC=2.8.1.10 {ECO:0000255|HAMAP-Rule:MF_00443};
GN   Name=thiG {ECO:0000255|HAMAP-Rule:MF_00443}; OrderedLocusNames=AZOSEA12960;
GN   ORFNames=c1A46;
OS   Aromatoleum aromaticum (strain EbN1) (Azoarcus sp. (strain EbN1)).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Rhodocyclales;
OC   Rhodocyclaceae; Aromatoleum.
OX   NCBI_TaxID=76114;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=EbN1;
RX   PubMed=15551059; DOI=10.1007/s00203-004-0742-9;
RA   Rabus R., Kube M., Heider J., Beck A., Heitmann K., Widdel F.,
RA   Reinhardt R.;
RT   "The genome sequence of an anaerobic aromatic-degrading denitrifying
RT   bacterium, strain EbN1.";
RL   Arch. Microbiol. 183:27-36(2005).
CC   -!- FUNCTION: Catalyzes the rearrangement of 1-deoxy-D-xylulose 5-phosphate
CC       (DXP) to produce the thiazole phosphate moiety of thiamine. Sulfur is
CC       provided by the thiocarboxylate moiety of the carrier protein ThiS. In
CC       vitro, sulfur can be provided by H(2)S. {ECO:0000255|HAMAP-
CC       Rule:MF_00443}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=1-deoxy-D-xylulose 5-phosphate + 2-iminoacetate + [sulfur-
CC         carrier protein ThiS]-C-terminal Gly-NH-CH2-C(O)SH = 2-[(2R,5Z)-2-
CC         carboxy-4-methylthiazol-5(2H)-ylidene]ethyl phosphate + [sulfur-
CC         carrier protein ThiS]-C-terminal Gly-Gly + 2 H(+) + 2 H2O;
CC         Xref=Rhea:RHEA:26297, Rhea:RHEA-COMP:12908, Rhea:RHEA-COMP:12909,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:57792,
CC         ChEBI:CHEBI:62899, ChEBI:CHEBI:77846, ChEBI:CHEBI:90619,
CC         ChEBI:CHEBI:90778; EC=2.8.1.10; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00443};
CC   -!- PATHWAY: Cofactor biosynthesis; thiamine diphosphate biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00443}.
CC   -!- SUBUNIT: Homotetramer. Forms heterodimers with either ThiH or ThiS.
CC       {ECO:0000255|HAMAP-Rule:MF_00443}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00443}.
CC   -!- SIMILARITY: Belongs to the ThiG family. {ECO:0000255|HAMAP-
CC       Rule:MF_00443}.
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DR   EMBL; CR555306; CAI07421.1; -; Genomic_DNA.
DR   RefSeq; WP_011237141.1; NC_006513.1.
DR   AlphaFoldDB; Q5P5J1; -.
DR   SMR; Q5P5J1; -.
DR   STRING; 76114.c1A46; -.
DR   EnsemblBacteria; CAI07421; CAI07421; c1A46.
DR   KEGG; eba:c1A46; -.
DR   eggNOG; COG2022; Bacteria.
DR   HOGENOM; CLU_062233_1_1_4; -.
DR   OMA; PHNFQLI; -.
DR   OrthoDB; 784095at2; -.
DR   UniPathway; UPA00060; -.
DR   Proteomes; UP000006552; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:1990107; F:thiazole synthase activity; IEA:RHEA.
DR   GO; GO:0009229; P:thiamine diphosphate biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd04728; ThiG; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   HAMAP; MF_00443; ThiG; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR033983; Thiazole_synthase_ThiG.
DR   InterPro; IPR008867; ThiG.
DR   PANTHER; PTHR34266; PTHR34266; 1.
DR   Pfam; PF05690; ThiG; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Reference proteome; Schiff base; Thiamine biosynthesis;
KW   Transferase.
FT   CHAIN           1..261
FT                   /note="Thiazole synthase"
FT                   /id="PRO_0000162778"
FT   ACT_SITE        101
FT                   /note="Schiff-base intermediate with DXP"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         162
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         188..189
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         210..211
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ   SEQUENCE   261 AA;  27592 MW;  F4808FDEC6C3DD5D CRC64;
     MNDSLTIAGK SYRSRLLVGT GKYKDFAETR AAIDASGAEI VTVAIRRTNI GQNADEPNLL
     DVLPPERFTI LPNTAGCYTA DDAVRTLRLA RELLDGHALV KLEVLGDPVS LFPNMPETLK
     AAETLVKDGF QVMVYCADDP IQAKMLEDIG CVAVMPLASL IGSGMGILNP WNLRLIIDQA
     NVPVLVDAGV GTASDAAIAM ELGCDGVLMN TAIAHAKDPV LMASAMKKAV EAGREAFLAG
     RMPRKHYSAD PSSPTSGLIG S