THIG_SALRD
ID THIG_SALRD Reviewed; 273 AA.
AC Q2S371;
DT 30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT 24-JAN-2006, sequence version 1.
DT 03-AUG-2022, entry version 97.
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=SRU_1235;
OS Salinibacter ruber (strain DSM 13855 / M31).
OC Bacteria; Bacteroidetes; Bacteroidetes Order II. Incertae sedis;
OC Rhodothermaceae; Salinibacter.
OX NCBI_TaxID=309807;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 13855 / CECT 5946 / M31;
RX PubMed=16330755; DOI=10.1073/pnas.0509073102;
RA Mongodin E.F., Nelson K.E., Daugherty S., DeBoy R.T., Wister J., Khouri H.,
RA Weidman J., Walsh D.A., Papke R.T., Sanchez Perez G., Sharma A.K.,
RA Nesbo C.L., MacLeod D., Bapteste E., Doolittle W.F., Charlebois R.L.,
RA Legault B., Rodriguez-Valera F.;
RT "The genome of Salinibacter ruber: convergence and gene exchange among
RT hyperhalophilic bacteria and archaea.";
RL Proc. Natl. Acad. Sci. U.S.A. 102:18147-18152(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; CP000159; ABC46087.1; -; Genomic_DNA.
DR RefSeq; WP_011403988.1; NC_007677.1.
DR RefSeq; YP_445360.1; NC_007677.1.
DR AlphaFoldDB; Q2S371; -.
DR SMR; Q2S371; -.
DR STRING; 309807.SRU_1235; -.
DR EnsemblBacteria; ABC46087; ABC46087; SRU_1235.
DR KEGG; sru:SRU_1235; -.
DR PATRIC; fig|309807.25.peg.1283; -.
DR eggNOG; COG2022; Bacteria.
DR HOGENOM; CLU_062233_1_0_10; -.
DR OMA; PHNFQLI; -.
DR UniPathway; UPA00060; -.
DR Proteomes; UP000008674; 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..273
FT /note="Thiazole synthase"
FT /id="PRO_0000236363"
FT ACT_SITE 113
FT /note="Schiff-base intermediate with DXP"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 174
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 201..202
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 223..224
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ SEQUENCE 273 AA; 28980 MW; 79118F1F685A1DC9 CRC64;
MSDVTHANGA VANEADDALV IGDHSFSSRI LVGTSRYPNP QVMLDALEAT GTELVTVAIR
RVNIENPAPE SHLDLLRRGG YEVLPNTAGC YTAREAVLTA RLAREALGTD LLKLEVIGDD
ETLMPDVEQL LDAAKTLVDD GFTVLAYAND DPITCRKLAD LGCAAVMPLG SPIGSGMGIV
NPYNLRIIRE MIEDTPLIVD AGIGTASDAV TAMELGYDGI LVNTAIAQAQ HPVDMGRAMR
KAVEAGRSAH RAGRIPRRLY AEASSSMEGR IGT