ID   SYT_RICCN               Reviewed;         635 AA.
AC   Q92IX4;
DT   30-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   02-SEP-2026, entry version 135.
DE   RecName: Full=Threonine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_00184};
DE            EC=6.1.1.3 {ECO:0000255|HAMAP-Rule:MF_00184};
DE   AltName: Full=Threonyl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_00184};
DE            Short=ThrRS {ECO:0000255|HAMAP-Rule:MF_00184};
GN   Name=thrS {ECO:0000255|HAMAP-Rule:MF_00184}; OrderedLocusNames=RC0296;
OS   Rickettsia conorii (strain ATCC VR-613 / Malish 7).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria;
OC   Rickettsiales; Rickettsiaceae; Rickettsieae; Rickettsia;
OC   spotted fever group.
OX   NCBI_TaxID=272944;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC VR-613 / Malish 7;
RX   PubMed=11557893; DOI=10.1126/science.1061471;
RA   Ogata H., Audic S., Renesto-Audiffren P., Fournier P.-E., Barbe V.,
RA   Samson D., Roux V., Cossart P., Weissenbach J., Claverie J.-M., Raoult D.;
RT   "Mechanisms of evolution in Rickettsia conorii and R. prowazekii.";
RL   Science 293:2093-2098(2001).
CC   -!- FUNCTION: Catalyzes the attachment of threonine to tRNA(Thr) in a two-
CC       step reaction: L-threonine is first activated by ATP to form Thr-AMP
CC       and then transferred to the acceptor end of tRNA(Thr). Also edits
CC       incorrectly charged L-seryl-tRNA(Thr). {ECO:0000255|HAMAP-
CC       Rule:MF_00184}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=tRNA(Thr) + L-threonine + ATP = L-threonyl-tRNA(Thr) + AMP +
CC         diphosphate + H(+); Xref=Rhea:RHEA:24624, Rhea:RHEA-COMP:9670,
CC         Rhea:RHEA-COMP:9704, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:57926, ChEBI:CHEBI:78442,
CC         ChEBI:CHEBI:78534, ChEBI:CHEBI:456215; EC=6.1.1.3;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00184};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00184};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00184};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00184}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00184}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00184}.
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DR   EMBL; AE006914; AAL02834.1; -; Genomic_DNA.
DR   PIR; H97736; H97736.
DR   RefSeq; WP_010976955.1; NC_003103.1.
DR   AlphaFoldDB; Q92IX4; -.
DR   SMR; Q92IX4; -.
DR   GeneID; 927857; -.
DR   KEGG; rco:RC0296; -.
DR   PATRIC; fig|272944.4.peg.337; -.
DR   HOGENOM; CLU_008554_0_1_5; -.
DR   Proteomes; UP000000816; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004829; F:threonine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006435; P:threonyl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   CDD; cd01667; TGS_ThrRS; 1.
DR   CDD; cd00860; ThrRS_anticodon; 1.
DR   CDD; cd00771; ThrRS_core; 1.
DR   FunFam; 3.10.20.30:FF:000005; Threonine--tRNA ligase; 1.
DR   FunFam; 3.30.54.20:FF:000002; Threonine--tRNA ligase; 1.
DR   FunFam; 3.30.930.10:FF:000002; Threonine--tRNA ligase; 1.
DR   FunFam; 3.40.50.800:FF:000001; Threonine--tRNA ligase; 1.
DR   FunFam; 3.30.980.10:FF:000005; Threonyl-tRNA synthetase, mitochondrial; 1.
DR   Gene3D; 3.10.20.30; -; 1.
DR   Gene3D; 3.30.54.20; -; 1.
DR   Gene3D; 3.40.50.800; Anticodon-binding domain; 1.
DR   Gene3D; 3.30.930.10; Bira Bifunctional Protein, Domain 2; 1.
DR   Gene3D; 3.30.980.10; Threonyl-trna Synthetase, Chain A, domain 2; 1.
DR   HAMAP; MF_00184; Thr_tRNA_synth; 1.
DR   InterPro; IPR002314; aa-tRNA-synt_IIb.
DR   InterPro; IPR006195; aa-tRNA-synth_II.
DR   InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL.
DR   InterPro; IPR004154; Anticodon-bd.
DR   InterPro; IPR036621; Anticodon-bd_dom_sf.
DR   InterPro; IPR012675; Beta-grasp_dom_sf.
DR   InterPro; IPR004095; TGS.
DR   InterPro; IPR012676; TGS-like.
DR   InterPro; IPR002320; Thr-tRNA-ligase_IIa.
DR   InterPro; IPR018163; Thr/Ala-tRNA-synth_IIc_edit.
DR   InterPro; IPR047246; ThrRS_anticodon.
DR   InterPro; IPR033728; ThrRS_core.
DR   InterPro; IPR012947; tRNA_SAD.
DR   NCBIfam; TIGR00418; thrS; 1.
DR   PANTHER; PTHR11451:SF44; THREONINE--TRNA LIGASE, CHLOROPLASTIC_MITOCHONDRIAL 2; 1.
DR   PANTHER; PTHR11451; THREONINE-TRNA LIGASE; 1.
DR   Pfam; PF03129; HGTP_anticodon; 1.
DR   Pfam; PF02824; TGS; 1.
DR   Pfam; PF00587; tRNA-synt_2b; 1.
DR   Pfam; PF07973; tRNA_SAD; 1.
DR   PRINTS; PR01047; TRNASYNTHTHR.
DR   SMART; SM00863; tRNA_SAD; 1.
DR   SUPFAM; SSF52954; Class II aaRS ABD-related; 1.
DR   SUPFAM; SSF55681; Class II aaRS and biotin synthetases; 1.
DR   SUPFAM; SSF81271; TGS-like; 1.
DR   SUPFAM; SSF55186; ThrRS/AlaRS common domain; 1.
DR   PROSITE; PS50862; AA_TRNA_LIGASE_II; 1.
DR   PROSITE; PS51880; TGS; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase; Metal-binding;
KW   Nucleotide-binding; Protein biosynthesis; Reference proteome; RNA-binding;
KW   tRNA-binding; Zinc.
FT   CHAIN           1..635
FT                   /note="Threonine--tRNA ligase"
FT                   /id="PRO_0000101036"
FT   DOMAIN          1..61
FT                   /note="TGS"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01228"
FT   REGION          242..533
FT                   /note="Catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         333
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         384
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         510
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
SQ   SEQUENCE   635 AA;  72353 MW;  BCF988D88C5CC3EB CRC64;
     MINISFPDGS IKQFAKNITA YEVANAISMS LAKAAMVAEI NGELQDLSIV IDNDCKLRIL
     TAQDPECLEI IRHDAAHLTA EAVKELFPET QVTIGPAIEN GYYYDFARDK PFTTDDLAVI
     EAKMQELSQK NEQVTRELWD RDKAVEFFKS IGEHYKAEII ASIPAGEPIT LYRQGNFIDL
     CRGPHAPSTG VVKHFKLMKV AGAYWRGDSR NEMLQRIYGT AWATKEQLDS YLLMLEEAEK
     RDHRKLGREL DLFHFQEEAQ GMVFWHDKGW SIYNTIEQYI RKKIRKNGYT EVKTPVLVDK
     SLWEASGHWE KFRDDMFALE TDDKTLALKP MNCPCHVQIF KQGIKSYRDL PLRMSEFGLC
     HRNEASGALH GLMRVRSLVQ DDAHIFCAAE QITDETVSFC KLLTEVYKDF GFTDIKVKFS
     DRPEIRAGSN EVWDKAENAL KEAVEQAGFN YTLNPGEGAF YGPKLEFVLT DAIGRQWQCG
     TLQMDFVLPE RLDASYVAAS GEKKRPVMLH RAILGSLERF IGILIEEYAG RFPLWLAPVQ
     VAIATITSDL NDYALEVQKA LIDNGVRTDF NISPDKINYK IREFSNQKIP MIAVIGKQEQ
     ENKQVAIRRL GTTDQEVLSV EQLIAVVKEE NEKYL
//