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SYS_THESQ
ID   SYS_THESQ               Reviewed;         425 AA.
AC   B1LBU6;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   29-APR-2008, sequence version 1.
DT   03-AUG-2022, entry version 76.
DE   RecName: Full=Serine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_00176};
DE            EC=6.1.1.11 {ECO:0000255|HAMAP-Rule:MF_00176};
DE   AltName: Full=Seryl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_00176};
DE            Short=SerRS {ECO:0000255|HAMAP-Rule:MF_00176};
DE   AltName: Full=Seryl-tRNA(Ser/Sec) synthetase {ECO:0000255|HAMAP-Rule:MF_00176};
GN   Name=serS {ECO:0000255|HAMAP-Rule:MF_00176}; OrderedLocusNames=TRQ2_1450;
OS   Thermotoga sp. (strain RQ2).
OC   Bacteria; Thermotogae; Thermotogales; Thermotogaceae; Thermotoga;
OC   unclassified Thermotoga.
OX   NCBI_TaxID=126740;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RQ2;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Bruce D.B., Goodwin L., Pitluck S., Saunders E., Brettin T.,
RA   Detter J.C., Han C., Schmutz J., Larimer F., Land M., Hauser L.,
RA   Kyrpides N., Mikhailova N., Nelson K., Gogarten J.P., Noll K.,
RA   Richardson P.;
RT   "Complete sequence of Thermotoga sp. RQ2.";
RL   Submitted (MAR-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the attachment of serine to tRNA(Ser). Is also able
CC       to aminoacylate tRNA(Sec) with serine, to form the misacylated tRNA L-
CC       seryl-tRNA(Sec), which will be further converted into selenocysteinyl-
CC       tRNA(Sec). {ECO:0000255|HAMAP-Rule:MF_00176}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-serine + tRNA(Ser) = AMP + diphosphate + H(+) + L-
CC         seryl-tRNA(Ser); Xref=Rhea:RHEA:12292, Rhea:RHEA-COMP:9669,
CC         Rhea:RHEA-COMP:9703, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:33384, ChEBI:CHEBI:78442,
CC         ChEBI:CHEBI:78533, ChEBI:CHEBI:456215; EC=6.1.1.11;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00176};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-serine + tRNA(Sec) = AMP + diphosphate + H(+) + L-
CC         seryl-tRNA(Sec); Xref=Rhea:RHEA:42580, Rhea:RHEA-COMP:9742,
CC         Rhea:RHEA-COMP:10128, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:33384, ChEBI:CHEBI:78442,
CC         ChEBI:CHEBI:78533, ChEBI:CHEBI:456215; EC=6.1.1.11;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00176};
CC   -!- PATHWAY: Aminoacyl-tRNA biosynthesis; selenocysteinyl-tRNA(Sec)
CC       biosynthesis; L-seryl-tRNA(Sec) from L-serine and tRNA(Sec): step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_00176}.
CC   -!- SUBUNIT: Homodimer. The tRNA molecule binds across the dimer.
CC       {ECO:0000255|HAMAP-Rule:MF_00176}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00176}.
CC   -!- DOMAIN: Consists of two distinct domains, a catalytic core and a N-
CC       terminal extension that is involved in tRNA binding.
CC       {ECO:0000255|HAMAP-Rule:MF_00176}.
CC   -!- SIMILARITY: Belongs to the class-II aminoacyl-tRNA synthetase family.
CC       Type-1 seryl-tRNA synthetase subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_00176}.
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DR   EMBL; CP000969; ACB09794.1; -; Genomic_DNA.
DR   RefSeq; WP_012311140.1; NC_010483.1.
DR   AlphaFoldDB; B1LBU6; -.
DR   SMR; B1LBU6; -.
DR   EnsemblBacteria; ACB09794; ACB09794; TRQ2_1450.
DR   KEGG; trq:TRQ2_1450; -.
DR   HOGENOM; CLU_023797_1_1_0; -.
DR   OMA; SPCFRRE; -.
DR   OrthoDB; 353391at2; -.
DR   UniPathway; UPA00906; UER00895.
DR   Proteomes; UP000001687; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004828; F:serine-tRNA ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0016260; P:selenocysteine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0097056; P:selenocysteinyl-tRNA(Sec) biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0006434; P:seryl-tRNA aminoacylation; IEA:UniProtKB-UniRule.
DR   CDD; cd00770; SerRS_core; 1.
DR   Gene3D; 1.10.287.40; -; 1.
DR   Gene3D; 3.30.930.10; -; 1.
DR   HAMAP; MF_00176; Ser_tRNA_synth_type1; 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; IPR002317; Ser-tRNA-ligase_type_1.
DR   InterPro; IPR015866; Ser-tRNA-synth_1_N.
DR   InterPro; IPR042103; SerRS_1_N_sf.
DR   InterPro; IPR033729; SerRS_core.
DR   InterPro; IPR010978; tRNA-bd_arm.
DR   PANTHER; PTHR43697; PTHR43697; 1.
DR   Pfam; PF02403; Seryl_tRNA_N; 1.
DR   Pfam; PF00587; tRNA-synt_2b; 1.
DR   PIRSF; PIRSF001529; Ser-tRNA-synth_IIa; 1.
DR   PRINTS; PR00981; TRNASYNTHSER.
DR   SUPFAM; SSF46589; SSF46589; 1.
DR   SUPFAM; SSF55681; SSF55681; 1.
DR   TIGRFAMs; TIGR00414; serS; 1.
DR   PROSITE; PS50862; AA_TRNA_LIGASE_II; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase;
KW   Nucleotide-binding; Protein biosynthesis.
FT   CHAIN           1..425
FT                   /note="Serine--tRNA ligase"
FT                   /id="PRO_1000098139"
FT   BINDING         233..235
FT                   /ligand="L-serine"
FT                   /ligand_id="ChEBI:CHEBI:33384"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00176"
FT   BINDING         264..266
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00176"
FT   BINDING         287
FT                   /ligand="L-serine"
FT                   /ligand_id="ChEBI:CHEBI:33384"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00176"
FT   BINDING         351..354
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00176"
FT   BINDING         387
FT                   /ligand="L-serine"
FT                   /ligand_id="ChEBI:CHEBI:33384"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00176"
SQ   SEQUENCE   425 AA;  48867 MW;  17B53ED3904173F1 CRC64;
     MIDIKLIRQN PDFVKEALRK RGEDPAVIDE ILKIDADWRA TITKTNELRS RRNEISKNVA
     RLKKEGKNAE AEALIEEGKR LGEEIKALEE KEKELQEKLN YLLLMVPNIP HESVPVGEDE
     SQNVEVRRWG EPREFDFTPL AHWDLGPAWG LMDFSRASKL SGSRFTVMYG KLARLERALI
     NFMLDVHTKE HGYTEVWVPH LVKRETITIT GQLPKFEEEL YLAERDDLFL IPTAEVPLAA
     LHSGEILEEK ELPKKYVAYT PCYRREAGSY GKDVRGMIRQ HQFDKVELVW VTTPKRSFED
     LEQLVKDAET ILQKLELPYR VVSLCTGDLG FTSAKTYDIE VWLPSYNAYK EISSCSNVTD
     FQARRGNMRY RRRSDGKLEY VHTLNGSGIA VGRALVAILE NYQQPDGSVR VPEVLVPYTG
     FEVIP
 
 
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