ID   SYT_RICFE               Reviewed;         635 AA.
AC   Q4UKU3;
DT   30-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2005, sequence version 1.
DT   27-MAR-2024, entry version 104.
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};
GN   OrderedLocusNames=RF_0979;
OS   Rickettsia felis (strain ATCC VR-1525 / URRWXCal2) (Rickettsia azadi).
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Rickettsiales;
OC   Rickettsiaceae; Rickettsieae; Rickettsia; spotted fever group.
OX   NCBI_TaxID=315456;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC VR-1525 / URRWXCal2;
RX   PubMed=15984913; DOI=10.1371/journal.pbio.0030248;
RA   Ogata H., Renesto P., Audic S., Robert C., Blanc G., Fournier P.-E.,
RA   Parinello H., Claverie J.-M., Raoult D.;
RT   "The genome sequence of Rickettsia felis identifies the first putative
RT   conjugative plasmid in an obligate intracellular parasite.";
RL   PLoS Biol. 3:1-12(2005).
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=ATP + L-threonine + tRNA(Thr) = AMP + diphosphate + H(+) + L-
CC         threonyl-tRNA(Thr); 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; CP000053; AAY61830.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q4UKU3; -.
DR   SMR; Q4UKU3; -.
DR   STRING; 315456.RF_0979; -.
DR   KEGG; rfe:RF_0979; -.
DR   eggNOG; COG0441; Bacteria.
DR   HOGENOM; CLU_008554_0_1_5; -.
DR   OrthoDB; 9802304at2; -.
DR   Proteomes; UP000008548; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0004829; F:threonine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-KW.
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   Gene3D; 3.10.20.30; -; 1.
DR   Gene3D; 3.30.54.20; -; 1.
DR   Gene3D; 3.40.50.800; Anticodon-binding domain; 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; RNA-binding; tRNA-binding; Zinc.
FT   CHAIN           1..635
FT                   /note="Threonine--tRNA ligase"
FT                   /id="PRO_0000101037"
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;  72589 MW;  3B11869BA3758CB3 CRC64;
     MINISFPDGS VKQFESNITA FEVANAISMS LAKAAMVAEI NGELKDLSTI IENDCKLRIL
     TAKDSECLEI IRHDAAHIIA EAAKELFPDI QVTIGPAIEN GFFYDFAKDK PFTPDDVAMI
     EARMHEIVKR NEQITRELWD RDKAVEFFKS IGEHYKAEII ASIPAGEPIT LYRQGSFIDL
     CRGPHAPSTG FVKHFKLMKV AGAYWRGDSR NEMLQRIYGT AWATKEQLDN YLFMLEEAEK
     RDHRKLGREL DLFHFQEEAQ GMVFWHDKGW SIYNTIEQYI RKKIRKNGYT EVKTPVLVDK
     SLWEASGHWE KFREDMFALE TDDKTLALKP MNCPCHVQIF KQGIKSYRDL PLRMSEFGLC
     HRNEASGALH GLMRVRSLVQ DDAHIFCAEE QITDETVSFC KLLTEVYKDF GFTDIKVKFS
     DRPEIRAGSD EVWDKAENAL KEAVEKAGFT YTLNPGEGAF YGPKLEFVLT DAIGRQWQCG
     TLQMDFVLPE RLDASYIAAS GEKKRPVMLH RAILGSLERF IGILIEEYAG RFPIWLAPIQ
     VAIATITSDL NDYALEVQKA LIDNGVRTDI NISPDKINYK IREFSNQKIP MIAVIGKQEK
     ENKHVTIRRL GTTDQEVLSI EQLIALIKKE NEKYL
//