ID   SYT_SINFN               Reviewed;         661 AA.
AC   C3MB49;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   16-JUN-2009, sequence version 1.
DT   03-AUG-2022, entry version 90.
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=NGR_c12610;
OS   Sinorhizobium fredii (strain NBRC 101917 / NGR234).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Rhizobiaceae; Sinorhizobium/Ensifer group; Sinorhizobium.
OX   NCBI_TaxID=394;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NBRC 101917 / NGR234;
RX   PubMed=19376903; DOI=10.1128/aem.00515-09;
RA   Schmeisser C., Liesegang H., Krysciak D., Bakkou N., Le Quere A.,
RA   Wollherr A., Heinemeyer I., Morgenstern B., Pommerening-Roeser A.,
RA   Flores M., Palacios R., Brenner S., Gottschalk G., Schmitz R.A.,
RA   Broughton W.J., Perret X., Strittmatter A.W., Streit W.R.;
RT   "Rhizobium sp. strain NGR234 possesses a remarkable number of secretion
RT   systems.";
RL   Appl. Environ. Microbiol. 75:4035-4045(2009).
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;
CC         Evidence={ECO:0000255|HAMAP-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; CP001389; ACP25042.1; -; Genomic_DNA.
DR   RefSeq; WP_012707819.1; NC_012587.1.
DR   RefSeq; YP_002825795.1; NC_012587.1.
DR   AlphaFoldDB; C3MB49; -.
DR   SMR; C3MB49; -.
DR   STRING; 394.NGR_c12610; -.
DR   EnsemblBacteria; ACP25042; ACP25042; NGR_c12610.
DR   KEGG; rhi:NGR_c12610; -.
DR   PATRIC; fig|394.7.peg.4080; -.
DR   eggNOG; COG0441; Bacteria.
DR   HOGENOM; CLU_008554_0_1_5; -.
DR   OMA; FYYDFAY; -.
DR   OrthoDB; 900765at2; -.
DR   Proteomes; UP000001054; 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; cd00771; ThrRS_core; 1.
DR   Gene3D; 3.10.20.30; -; 1.
DR   Gene3D; 3.30.930.10; -; 1.
DR   Gene3D; 3.40.50.800; -; 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; IPR033728; ThrRS_core.
DR   InterPro; IPR012947; tRNA_SAD.
DR   PANTHER; PTHR11451; PTHR11451; 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; SSF55186; SSF55186; 1.
DR   SUPFAM; SSF55681; SSF55681; 1.
DR   SUPFAM; SSF81271; SSF81271; 1.
DR   TIGRFAMs; TIGR00418; thrS; 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..661
FT                   /note="Threonine--tRNA ligase"
FT                   /id="PRO_1000199562"
FT   DOMAIN          1..64
FT                   /note="TGS"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01228"
FT   REGION          245..547
FT                   /note="Catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         341
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         392
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
FT   BINDING         524
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00184"
SQ   SEQUENCE   661 AA;  74774 MW;  5B36B06E2F6BD38F CRC64;
     MSHSVSLTFP DGSVREFAAG TTGRDVAESI SKSLAKKAVA IALDGELRDL SDPIADGKIE
     IVTREDKRAL ELIRHDAAHV MAEAVQELWP GTQVTIGPVI DNGFYYDFAK NEPFTPDDLP
     VIEKKMKEII ARNNPFSKEV WSRDKAKEVF AAKGESYKVE LVDAIPEGQD LKIYYQGDWF
     DLCRGPHMAS TGQIGTAFKL MKVAGAYWRG DSNNPMLTRI YGTAWHTQEE LDQYLHVLAE
     AEKRDHRRLG REMDLFHFQE EGPGVVFWHG KGWRVFQSLV AYMRRRLEVD YQEVNAPQVL
     DKSLWETSGH WGWYRDNMFK VTVAGDETDD DRVFALKPMN CPGHIQIFKH GLKSYRELPV
     RMAEFGAVHR YEPSGALHGL MRVRGFTQDD AHIFCTDEQM AAECLKINDL ILSVYEDFGF
     KEIVVKLSTR PDKRVGSDAL WDRAEAVMTD VLNTIEAQSE GRIKTGILPG EGAFYGPKFE
     YTLKDAIGRE WQCGTTQVDF NLPERFGAFY IDKDSEKRQP VMIHRAICGS MERFLGILLE
     NYAGHMPLWI SPLQVVVATI TSDADDYGRE VAARLREAGL TVETDFRNEK INYKIREHSV
     TKVPVIVVCG KREAEERSVN IRRLGSQAQT AMSLEEAVAA LSSEAMAPDL KRKMERSARA
     A