ID   THIG_MAGSA              Reviewed;         324 AA.
AC   Q2W3R9;
DT   30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT   10-JAN-2006, sequence version 1.
DT   03-AUG-2022, entry version 100.
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=amb2702;
OS   Magnetospirillum magneticum (strain AMB-1 / ATCC 700264).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales;
OC   Rhodospirillaceae; Magnetospirillum.
OX   NCBI_TaxID=342108;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AMB-1 / ATCC 700264;
RX   PubMed=16303747; DOI=10.1093/dnares/dsi002;
RA   Matsunaga T., Okamura Y., Fukuda Y., Wahyudi A.T., Murase Y., Takeyama H.;
RT   "Complete genome sequence of the facultative anaerobic magnetotactic
RT   bacterium Magnetospirillum sp. strain AMB-1.";
RL   DNA Res. 12:157-166(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; AP007255; BAE51506.1; -; Genomic_DNA.
DR   RefSeq; WP_011385082.1; NC_007626.1.
DR   AlphaFoldDB; Q2W3R9; -.
DR   SMR; Q2W3R9; -.
DR   STRING; 342108.amb2702; -.
DR   EnsemblBacteria; BAE51506; BAE51506; amb2702.
DR   KEGG; mag:amb2702; -.
DR   HOGENOM; CLU_062233_1_1_5; -.
DR   OMA; PHNFQLI; -.
DR   OrthoDB; 784095at2; -.
DR   UniPathway; UPA00060; -.
DR   Proteomes; UP000007058; 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; 3.10.20.30; -; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   HAMAP; MF_00443; ThiG; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR012675; Beta-grasp_dom_sf.
DR   InterPro; IPR016155; Mopterin_synth/thiamin_S_b.
DR   InterPro; IPR010035; Thi_S.
DR   InterPro; IPR033983; Thiazole_synthase_ThiG.
DR   InterPro; IPR008867; ThiG.
DR   InterPro; IPR003749; ThiS/MoaD-like.
DR   PANTHER; PTHR34266; PTHR34266; 1.
DR   Pfam; PF05690; ThiG; 1.
DR   Pfam; PF02597; ThiS; 1.
DR   SUPFAM; SSF54285; SSF54285; 1.
DR   TIGRFAMs; TIGR01683; thiS; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Reference proteome; Schiff base; Thiamine biosynthesis;
KW   Transferase.
FT   CHAIN           1..324
FT                   /note="Thiazole synthase"
FT                   /id="PRO_0000236343"
FT   ACT_SITE        167
FT                   /note="Schiff-base intermediate with DXP"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         228
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         254..255
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT   BINDING         276..277
FT                   /ligand="1-deoxy-D-xylulose 5-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:57792"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ   SEQUENCE   324 AA;  34442 MW;  A30AE44E89C87BAE CRC64;
     MKLVINGEER NFSASMTVEA LLGELGVDSR KVAVERNLEI VPKSSYAQVA VNDGDKLEIV
     AFIGGGSDQA DSFTVAGKTF NSRLLVGTGK YKDFEETALA IEASGAEIVT VAVRRVNLSD
     PSKPMLVDYV SPKKYTFLPN TAGCYTADDS VRTLRLAREA GGWNLVKLEV LGDQTTLYPN
     MPETLKAAEA LIKDGFEVMV YCSDDPIQAK MLEDMGCVAI MPLGSLIGSG LGILNPTTIR
     IIKDTVKVPV LVDAGVGTAS DAALAMELGC DGVLMNTAIA HAKDPIRMAR AMKLAIEAGR
     LSYLAGRMPK KSYADPSSPT SGLI