THI4_HALSA
ID THI4_HALSA Reviewed; 310 AA.
AC Q9HMC7;
DT 11-JAN-2001, integrated into UniProtKB/Swiss-Prot.
DT 11-JAN-2001, sequence version 1.
DT 03-AUG-2022, entry version 114.
DE RecName: Full=Thiamine thiazole synthase {ECO:0000255|HAMAP-Rule:MF_00304};
DE EC=2.4.2.60 {ECO:0000255|HAMAP-Rule:MF_00304};
GN Name=thi4 {ECO:0000255|HAMAP-Rule:MF_00304}; OrderedLocusNames=VNG_2604G;
OS Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1)
OS (Halobacterium halobium).
OC Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Halobacteriales;
OC Halobacteriaceae; Halobacterium.
OX NCBI_TaxID=64091;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700922 / JCM 11081 / NRC-1;
RX PubMed=11016950; DOI=10.1073/pnas.190337797;
RA Ng W.V., Kennedy S.P., Mahairas G.G., Berquist B., Pan M., Shukla H.D.,
RA Lasky S.R., Baliga N.S., Thorsson V., Sbrogna J., Swartzell S., Weir D.,
RA Hall J., Dahl T.A., Welti R., Goo Y.A., Leithauser B., Keller K., Cruz R.,
RA Danson M.J., Hough D.W., Maddocks D.G., Jablonski P.E., Krebs M.P.,
RA Angevine C.M., Dale H., Isenbarger T.A., Peck R.F., Pohlschroder M.,
RA Spudich J.L., Jung K.-H., Alam M., Freitas T., Hou S., Daniels C.J.,
RA Dennis P.P., Omer A.D., Ebhardt H., Lowe T.M., Liang P., Riley M., Hood L.,
RA DasSarma S.;
RT "Genome sequence of Halobacterium species NRC-1.";
RL Proc. Natl. Acad. Sci. U.S.A. 97:12176-12181(2000).
CC -!- FUNCTION: Involved in biosynthesis of the thiamine precursor thiazole.
CC Catalyzes the conversion of NAD and glycine to adenosine diphosphate 5-
CC (2-hydroxyethyl)-4-methylthiazole-2-carboxylic acid (ADT), an
CC adenylated thiazole intermediate. The reaction includes an iron-
CC dependent sulfide transfer from a conserved cysteine residue of the
CC protein to a thiazole intermediate. The enzyme can only undergo a
CC single turnover, which suggests it is a suicide enzyme.
CC {ECO:0000255|HAMAP-Rule:MF_00304}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=[ADP-thiazole synthase]-L-cysteine + glycine + NAD(+) = [ADP-
CC thiazole synthase]-dehydroalanine + ADP-5-ethyl-4-methylthiazole-2-
CC carboxylate + 2 H(+) + 3 H2O + nicotinamide; Xref=Rhea:RHEA:55708,
CC Rhea:RHEA-COMP:14264, Rhea:RHEA-COMP:14265, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:17154, ChEBI:CHEBI:29950,
CC ChEBI:CHEBI:57305, ChEBI:CHEBI:57540, ChEBI:CHEBI:90873,
CC ChEBI:CHEBI:139151; EC=2.4.2.60; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00304};
CC -!- COFACTOR:
CC Name=Fe(2+); Xref=ChEBI:CHEBI:29033;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00304};
CC -!- PATHWAY: Cofactor biosynthesis; thiamine diphosphate biosynthesis.
CC {ECO:0000255|HAMAP-Rule:MF_00304}.
CC -!- SUBUNIT: Homooctamer; tetramer of dimers. {ECO:0000255|HAMAP-
CC Rule:MF_00304}.
CC -!- PTM: During the catalytic reaction, a sulfide is transferred from Cys-
CC 165 to a reaction intermediate, generating a dehydroalanine residue.
CC {ECO:0000255|HAMAP-Rule:MF_00304}.
CC -!- SIMILARITY: Belongs to the THI4 family. {ECO:0000255|HAMAP-
CC Rule:MF_00304}.
CC -!- SEQUENCE CAUTION:
CC Sequence=AAG20644.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; AE004437; AAG20644.1; ALT_INIT; Genomic_DNA.
DR PIR; H84409; H84409.
DR RefSeq; WP_010903946.1; NC_002607.1.
DR AlphaFoldDB; Q9HMC7; -.
DR SMR; Q9HMC7; -.
DR STRING; 64091.VNG_2604G; -.
DR PaxDb; Q9HMC7; -.
DR EnsemblBacteria; AAG20644; AAG20644; VNG_2604G.
DR GeneID; 5953457; -.
DR GeneID; 62887832; -.
DR KEGG; hal:VNG_2604G; -.
DR PATRIC; fig|64091.14.peg.2017; -.
DR HOGENOM; CLU_053727_2_0_2; -.
DR InParanoid; Q9HMC7; -.
DR OrthoDB; 61905at2157; -.
DR PhylomeDB; Q9HMC7; -.
DR UniPathway; UPA00060; -.
DR Proteomes; UP000000554; Chromosome.
DR GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0016763; F:pentosyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009228; P:thiamine biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0009229; P:thiamine diphosphate biosynthetic process; IEA:UniProtKB-UniPathway.
DR GO; GO:0052837; P:thiazole biosynthetic process; IEA:UniProtKB-UniRule.
DR Gene3D; 3.50.50.60; -; 1.
DR HAMAP; MF_00304; Thi4; 1.
DR InterPro; IPR036188; FAD/NAD-bd_sf.
DR InterPro; IPR002922; Thi4_fam.
DR InterPro; IPR022828; Thi4_prok.
DR SUPFAM; SSF51905; SSF51905; 1.
DR TIGRFAMs; TIGR00292; TIGR00292; 1.
PE 3: Inferred from homology;
KW Iron; Metal-binding; NAD; Reference proteome; Thiamine biosynthesis;
KW Transferase.
FT CHAIN 1..310
FT /note="Thiamine thiazole synthase"
FT /id="PRO_0000153945"
FT BINDING 42
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 61..62
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 69
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 167
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 167
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 182
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 257
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /ligand_note="ligand shared between two adjacent protomers"
FT /note="in other chain"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT BINDING 267
FT /ligand="glycine"
FT /ligand_id="ChEBI:CHEBI:57305"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
FT MOD_RES 165
FT /note="2,3-didehydroalanine (Cys)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00304"
SQ SEQUENCE 310 AA; 32681 MW; B98DBCF375F10E68 CRC64;
MTFDSFADAN EAEVTRAITR QWTDEFLDDT ETDVIIVGGG PSGLMAAKEL ADRDVDVTII
EKNNYLGGGF WLGGFLMNKL TVRSPAEAVL DDLGVPYEYD EENDGLAVAD APHACSAMIT
AACDAGARIQ NMTEFTDIVV RDDHAVAGAV VNWTPVHSLP RELTCVDPIA LEADVVVDAT
GHDAVVVSKL HERGVLEADG IEHVEEHATG MDQSGDGEYG APGHDSPGHD SMWVADSEDK
VVEQTGKVHD GLVTAGLSTA TVHGLTRMGP TFGAMLLSGK VAANAVMDEL AVDEPRVDLP
STAAPAADDD
