ID   THIG_PELTS              Reviewed;         256 AA.
AC   A5D4K1;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-JUN-2007, sequence version 1.
DT   03-AUG-2022, entry version 78.
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=PTH_0640;
OS   Pelotomaculum thermopropionicum (strain DSM 13744 / JCM 10971 / SI).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Desulfotomaculaceae;
OC   Pelotomaculum.
OX   NCBI_TaxID=370438;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 13744 / JCM 10971 / SI;
RX   PubMed=18218977; DOI=10.1101/gr.7136508;
RA   Kosaka T., Kato S., Shimoyama T., Ishii S., Abe T., Watanabe K.;
RT   "The genome of Pelotomaculum thermopropionicum reveals niche-associated
RT   evolution in anaerobic microbiota.";
RL   Genome Res. 18:442-448(2008).
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; AP009389; BAF58821.1; -; Genomic_DNA.
DR   AlphaFoldDB; A5D4K1; -.
DR   SMR; A5D4K1; -.
DR   STRING; 370438.PTH_0640; -.
DR   EnsemblBacteria; BAF58821; BAF58821; PTH_0640.
DR   KEGG; pth:PTH_0640; -.
DR   eggNOG; COG2022; Bacteria.
DR   HOGENOM; CLU_062233_1_0_9; -.
DR   OMA; PHNFQLI; -.
DR   UniPathway; UPA00060; -.
DR   Proteomes; UP000006556; 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..256
FT                   /note="Thiazole synthase"
FT                   /id="PRO_1000080873"
FT   ACT_SITE        97
FT                   /note="Schiff-base intermediate with DXP"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         158
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         184..185
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         206..207
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ   SEQUENCE   256 AA;  27186 MW;  692CBFBAC59FD107 CRC64;
     MEDTFKIGGR ELTSRLFLGT GKFSSNRLIP EAVRASGAQV VTVALRRIDL EYEEENIAAY
     VPKDCILMPN TSGARNAQEA VRIARLARAA GCGNWVKIEV ITDNRYLLPD NYETIKATEI
     LAAEGFVVLP YMSPDLMVAK KLAEAGAAAV MPLGAPIGSN RGLRTKELVR ILIDEIPLPI
     IVDAGLGRPS EAAEAMEMGA AAVLVNTAIA TAGDPVAMAR AFGLAVKAGR LAYLAGPGET
     QEYARASSPL TGFLRD