ID   THIG_BACMK              Reviewed;         256 AA.
AC   A9VFL4;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   05-FEB-2008, sequence version 1.
DT   03-AUG-2022, entry version 76.
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};
GN   OrderedLocusNames=BcerKBAB4_0648;
OS   Bacillus mycoides (strain KBAB4) (Bacillus weihenstephanensis).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC   Bacillus cereus group.
OX   NCBI_TaxID=315730;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KBAB4;
RX   PubMed=17434157; DOI=10.1016/j.cbi.2007.03.003;
RA   Lapidus A., Goltsman E., Auger S., Galleron N., Segurens B., Dossat C.,
RA   Land M.L., Broussolle V., Brillard J., Guinebretiere M.-H., Sanchis V.,
RA   Nguen-the C., Lereclus D., Richardson P., Wincker P., Weissenbach J.,
RA   Ehrlich S.D., Sorokin A.;
RT   "Extending the Bacillus cereus group genomics to putative food-borne
RT   pathogens of different toxicity.";
RL   Chem. Biol. Interact. 171:236-249(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; CP000903; ABY41910.1; -; Genomic_DNA.
DR   RefSeq; WP_002186754.1; NC_010184.1.
DR   AlphaFoldDB; A9VFL4; -.
DR   SMR; A9VFL4; -.
DR   STRING; 315730.BcerKBAB4_0648; -.
DR   EnsemblBacteria; ABY41910; ABY41910; BcerKBAB4_0648.
DR   GeneID; 66264193; -.
DR   KEGG; bwe:BcerKBAB4_0648; -.
DR   eggNOG; COG2022; Bacteria.
DR   HOGENOM; CLU_062233_1_0_9; -.
DR   OMA; PHNFQLI; -.
DR   UniPathway; UPA00060; -.
DR   Proteomes; UP000002154; 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; Schiff base; Thiamine biosynthesis; Transferase.
FT   CHAIN           1..256
FT                   /note="Thiazole synthase"
FT                   /id="PRO_1000124604"
FT   ACT_SITE        96
FT                   /note="Schiff-base intermediate with DXP"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         157
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         183..184
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         205..206
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;  27209 MW;  C3514BAB81B5C95E CRC64;
     MLNIGQFSFH SRLLLGTGKF PDFDVQQKAI DVSEAEILTF AVRRMDIFDA KQPNLLEKLD
     VKKYTLLPNT AGAKNAEEAV RIAKLAKASG LCDMIKVEVI GDDRTLLPDP VETLKASEML
     LEEGFIVLPY TSDDVVLARK LQELGVHAIM PGASPIGSGL GIVNPLNLSF IIEQATVPVI
     VDAGIGSPAD AAFAMELGAD GVLLNTAVSG ANDPIKMAYA MKLGIEAGRL GFEAGRIARK
     RCATASSPLE GMSVVE