THIG_XANCB
ID THIG_XANCB Reviewed; 264 AA.
AC B0RPJ1;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 08-APR-2008, sequence version 1.
DT 03-AUG-2022, entry version 77.
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=xcc-b100_1028;
OS Xanthomonas campestris pv. campestris (strain B100).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Xanthomonadales;
OC Xanthomonadaceae; Xanthomonas.
OX NCBI_TaxID=509169;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=B100;
RX PubMed=18304669; DOI=10.1016/j.jbiotec.2007.12.013;
RA Vorhoelter F.-J., Schneiker S., Goesmann A., Krause L., Bekel T.,
RA Kaiser O., Linke B., Patschkowski T., Rueckert C., Schmid J., Sidhu V.K.,
RA Sieber V., Tauch A., Watt S.A., Weisshaar B., Becker A., Niehaus K.,
RA Puehler A.;
RT "The genome of Xanthomonas campestris pv. campestris B100 and its use for
RT the reconstruction of metabolic pathways involved in xanthan
RT biosynthesis.";
RL J. Biotechnol. 134:33-45(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; AM920689; CAP50376.1; -; Genomic_DNA.
DR AlphaFoldDB; B0RPJ1; -.
DR SMR; B0RPJ1; -.
DR KEGG; xca:xcc-b100_1028; -.
DR HOGENOM; CLU_062233_1_0_6; -.
DR OMA; PHNFQLI; -.
DR UniPathway; UPA00060; -.
DR Proteomes; UP000001188; 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..264
FT /note="Thiazole synthase"
FT /id="PRO_1000196914"
FT ACT_SITE 106
FT /note="Schiff-base intermediate with DXP"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 167
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 193..194
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 215..216
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ SEQUENCE 264 AA; 27914 MW; 1B30A82ACEF5A080 CRC64;
MTLSAPSDAL VIAGKPYRSR LLTGTGKFKD LDETRLATEA AAAQIVTVAI RRVNIGQDPN
APSLLDVLPP DRYTLLPNTA GCYTAEDAVR TCRLARELLD GHNLTKLEVL GDERTLYPDV
VQTLKAAEQL VADGFEVMVY TSDDPILAKR LEEIGCVAVM PLAAPIGSGL GIQNKYNLLE
IIENAKVPII VDAGVGTASD AAIAMELGCD GVLMNTAIAG ARDPILMASA MRKAIEAGRE
AFLAGRIPRK RYASASSPVD GVIG
