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THII_BLOPB
ID   THII_BLOPB              Reviewed;         486 AA.
AC   Q493G5;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   03-AUG-2022, entry version 94.
DE   RecName: Full=tRNA sulfurtransferase {ECO:0000255|HAMAP-Rule:MF_00021};
DE            EC=2.8.1.4 {ECO:0000255|HAMAP-Rule:MF_00021};
DE   AltName: Full=Sulfur carrier protein ThiS sulfurtransferase {ECO:0000255|HAMAP-Rule:MF_00021};
DE   AltName: Full=Thiamine biosynthesis protein ThiI {ECO:0000255|HAMAP-Rule:MF_00021};
DE   AltName: Full=tRNA 4-thiouridine synthase {ECO:0000255|HAMAP-Rule:MF_00021};
GN   Name=thiI {ECO:0000255|HAMAP-Rule:MF_00021}; OrderedLocusNames=BPEN_246;
OS   Blochmannia pennsylvanicus (strain BPEN).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; ant endosymbionts; Candidatus Blochmannia.
OX   NCBI_TaxID=291272;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=BPEN;
RX   PubMed=16077009; DOI=10.1101/gr.3771305;
RA   Degnan P.H., Lazarus A.B., Wernegreen J.J.;
RT   "Genome sequence of Blochmannia pennsylvanicus indicates parallel
RT   evolutionary trends among bacterial mutualists of insects.";
RL   Genome Res. 15:1023-1033(2005).
CC   -!- FUNCTION: Catalyzes the ATP-dependent transfer of a sulfur to tRNA to
CC       produce 4-thiouridine in position 8 of tRNAs, which functions as a
CC       near-UV photosensor. Also catalyzes the transfer of sulfur to the
CC       sulfur carrier protein ThiS, forming ThiS-thiocarboxylate. This is a
CC       step in the synthesis of thiazole, in the thiamine biosynthesis
CC       pathway. The sulfur is donated as persulfide by IscS.
CC       {ECO:0000255|HAMAP-Rule:MF_00021}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[ThiI sulfur-carrier protein]-S-sulfanyl-L-cysteine + a
CC         uridine in tRNA + ATP + H(+) + 2 reduced [2Fe-2S]-[ferredoxin] =
CC         [ThiI sulfur-carrier protein]-L-cysteine + a 4-thiouridine in tRNA +
CC         AMP + diphosphate + 2 oxidized [2Fe-2S]-[ferredoxin];
CC         Xref=Rhea:RHEA:24176, Rhea:RHEA-COMP:10000, Rhea:RHEA-COMP:10001,
CC         Rhea:RHEA-COMP:13337, Rhea:RHEA-COMP:13338, Rhea:RHEA-COMP:13339,
CC         Rhea:RHEA-COMP:13340, ChEBI:CHEBI:15378, ChEBI:CHEBI:29950,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:33737,
CC         ChEBI:CHEBI:33738, ChEBI:CHEBI:61963, ChEBI:CHEBI:65315,
CC         ChEBI:CHEBI:136798, ChEBI:CHEBI:456215; EC=2.8.1.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00021};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[sulfur-carrier protein ThiS]-C-terminal Gly-Gly-AMP + AH2 +
CC         S-sulfanyl-L-cysteinyl-[cysteine desulfurase] = [sulfur-carrier
CC         protein ThiS]-C-terminal Gly-NH-CH2-C(O)SH + A + AMP + H(+) + L-
CC         cysteinyl-[cysteine desulfurase]; Xref=Rhea:RHEA:43340, Rhea:RHEA-
CC         COMP:12157, Rhea:RHEA-COMP:12158, Rhea:RHEA-COMP:12908, Rhea:RHEA-
CC         COMP:12910, ChEBI:CHEBI:13193, ChEBI:CHEBI:15378, ChEBI:CHEBI:17499,
CC         ChEBI:CHEBI:29950, ChEBI:CHEBI:61963, ChEBI:CHEBI:90618,
CC         ChEBI:CHEBI:90619, ChEBI:CHEBI:456215; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00021};
CC   -!- PATHWAY: Cofactor biosynthesis; thiamine diphosphate biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00021}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00021}.
CC   -!- SIMILARITY: Belongs to the ThiI family. {ECO:0000255|HAMAP-
CC       Rule:MF_00021}.
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DR   EMBL; CP000016; AAZ40877.1; -; Genomic_DNA.
DR   RefSeq; WP_011282784.1; NC_007292.1.
DR   AlphaFoldDB; Q493G5; -.
DR   SMR; Q493G5; -.
DR   STRING; 291272.BPEN_246; -.
DR   EnsemblBacteria; AAZ40877; AAZ40877; BPEN_246.
DR   KEGG; bpn:BPEN_246; -.
DR   eggNOG; COG0301; Bacteria.
DR   eggNOG; COG0607; Bacteria.
DR   HOGENOM; CLU_037952_4_1_6; -.
DR   OMA; SMPEFCG; -.
DR   BioCyc; CBLO291272:BPEN_RS01205-MON; -.
DR   UniPathway; UPA00060; -.
DR   Proteomes; UP000007794; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004810; F:tRNA adenylyltransferase activity; IEA:InterPro.
DR   GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0140741; F:tRNA U4 sulfurtransferase; IEA:UniProtKB-EC.
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:InterPro.
DR   GO; GO:0034227; P:tRNA thio-modification; IEA:UniProtKB-UniRule.
DR   CDD; cd01712; ThiI; 1.
DR   Gene3D; 3.40.250.10; -; 1.
DR   Gene3D; 3.40.50.620; -; 1.
DR   HAMAP; MF_00021; ThiI; 1.
DR   InterPro; IPR001763; Rhodanese-like_dom.
DR   InterPro; IPR036873; Rhodanese-like_dom_sf.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   InterPro; IPR026340; Thiazole_biosynth_dom.
DR   InterPro; IPR020536; ThiI_AANH.
DR   InterPro; IPR004114; THUMP_dom.
DR   InterPro; IPR003720; tRNA_STrfase.
DR   Pfam; PF02568; ThiI; 1.
DR   Pfam; PF02926; THUMP; 1.
DR   SMART; SM00981; THUMP; 1.
DR   SUPFAM; SSF52821; SSF52821; 1.
DR   TIGRFAMs; TIGR04271; ThiI_C_thiazole; 1.
DR   TIGRFAMs; TIGR00342; TIGR00342; 1.
DR   PROSITE; PS50206; RHODANESE_3; 1.
DR   PROSITE; PS51165; THUMP; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Disulfide bond; Nucleotide-binding;
KW   Redox-active center; RNA-binding; Thiamine biosynthesis; Transferase;
KW   tRNA-binding.
FT   CHAIN           1..486
FT                   /note="tRNA sulfurtransferase"
FT                   /id="PRO_1000074210"
FT   DOMAIN          60..166
FT                   /note="THUMP"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   DOMAIN          406..484
FT                   /note="Rhodanese"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   ACT_SITE        458
FT                   /note="Cysteine persulfide intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   BINDING         184..185
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   BINDING         266
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   BINDING         288
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   BINDING         297
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
FT   DISULFID        345..458
FT                   /note="Redox-active"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00021"
SQ   SEQUENCE   486 AA;  56164 MW;  66EB723A63F6FCEA CRC64;
     MKIVIKLSPE ITIKSRAIRI FFIKILITNI KTILKKNNES ASIIRNWDYL EVICNHSKYQ
     KICAMLINIP GIHHLLLIKK HMFRSLQDIY EKIILSLNYE IQLSGKSFCV RVKRCGKHNF
     TSQEVEHYLG NKLCQNIGNI RVNLTKPEKT IYLEIKDNQL FIIIKRYEGL GGFPIGTQQE
     MLSLISGGFD SAVASYMLIR RGCKVNYCFF NLGGDMHTVE VCRVIYFLWN KFSSSHKIKF
     ISIDFSEVIK EITAKIKDNQ IGVVLKRMMI RSASLVANRY KITALITGEV LGQVSSQTLS
     NLTLIDSVSD HVIFRPLIAY DKEKIIDLAR KIGTEILSKS VPEYCGIISK KSTAKTTKQL
     IEFEENNFDF TVLNRAVSQS YVIDVQNIPD QIINQHVFQV ETKKILDSTD VVLDIRTEIE
     QEKNPLYLNN IEIKKIPFYN LIDQFSKLDP NKIYLLYCDH GIMSRLQVMY LHRQGFSNVK
     IYRPPR
 
 
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