THIG_RHORT
ID THIG_RHORT Reviewed; 289 AA.
AC Q2RRL3;
DT 30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2006, sequence version 2.
DT 03-AUG-2022, entry version 90.
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=Rru_A2432;
OS Rhodospirillum rubrum (strain ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 /
OS NCIMB 8255 / S1).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales;
OC Rhodospirillaceae; Rhodospirillum.
OX NCBI_TaxID=269796;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 11170 / ATH 1.1.1 / DSM 467 / LMG 4362 / NCIMB 8255 / S1;
RX PubMed=21886856; DOI=10.4056/sigs.1804360;
RA Munk A.C., Copeland A., Lucas S., Lapidus A., Del Rio T.G., Barry K.,
RA Detter J.C., Hammon N., Israni S., Pitluck S., Brettin T., Bruce D.,
RA Han C., Tapia R., Gilna P., Schmutz J., Larimer F., Land M., Kyrpides N.C.,
RA Mavromatis K., Richardson P., Rohde M., Goeker M., Klenk H.P., Zhang Y.,
RA Roberts G.P., Reslewic S., Schwartz D.C.;
RT "Complete genome sequence of Rhodospirillum rubrum type strain (S1).";
RL Stand. Genomic Sci. 4:293-302(2011).
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}.
CC -!- SEQUENCE CAUTION:
CC Sequence=ABC23232.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; CP000230; ABC23232.1; ALT_INIT; Genomic_DNA.
DR RefSeq; YP_427519.2; NC_007643.1.
DR AlphaFoldDB; Q2RRL3; -.
DR SMR; Q2RRL3; -.
DR STRING; 269796.Rru_A2432; -.
DR EnsemblBacteria; ABC23232; ABC23232; Rru_A2432.
DR KEGG; rru:Rru_A2432; -.
DR PATRIC; fig|269796.9.peg.2535; -.
DR eggNOG; COG2022; Bacteria.
DR HOGENOM; CLU_062233_1_1_5; -.
DR OrthoDB; 784095at2; -.
DR PhylomeDB; Q2RRL3; -.
DR UniPathway; UPA00060; -.
DR Proteomes; UP000001929; 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; 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..289
FT /note="Thiazole synthase"
FT /id="PRO_0000236362"
FT ACT_SITE 132
FT /note="Schiff-base intermediate with DXP"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 193
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 219..220
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
FT BINDING 241..242
FT /ligand="1-deoxy-D-xylulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:57792"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00443"
SQ SEQUENCE 289 AA; 30952 MW; 9275B30D6BFF9503 CRC64;
MARTTYKETA LDEGDQLEIV HFIGGGDRSD PQPADDPFTV AGRVFSSRLL VGTGKYRDFE
ETARAIEASG AEIVTVAVRR VNVSDPSQPM LVDYVDPAKY TYLPNTAGCF TADEAVRTLR
LAREAGGWSL VKLEVLGDQR TLYPNMAETF LAAEALIRDG FEVMVYCADD PIAAKRLEDM
GCVAIMPLGS LIGSGLGIIN PYTIRLIKES VSVPVLVDAG VGTASDAAVA MELGCDGVLM
NTAIAQAKDP VRMARAMRLA IEAGRLSYQA GRMPRKLYAD PSSPLAGLI
