ID   SYI_AQUAE               Reviewed;         956 AA.
AC   O66651;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   27-MAR-2024, entry version 139.
DE   RecName: Full=Isoleucine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_02002};
DE            EC=6.1.1.5 {ECO:0000255|HAMAP-Rule:MF_02002};
DE   AltName: Full=Isoleucyl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_02002};
DE            Short=IleRS {ECO:0000255|HAMAP-Rule:MF_02002};
GN   Name=ileS {ECO:0000255|HAMAP-Rule:MF_02002}; OrderedLocusNames=aq_305;
OS   Aquifex aeolicus (strain VF5).
OC   Bacteria; Aquificota; Aquificae; Aquificales; Aquificaceae; Aquifex.
OX   NCBI_TaxID=224324;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VF5;
RX   PubMed=9537320; DOI=10.1038/32831;
RA   Deckert G., Warren P.V., Gaasterland T., Young W.G., Lenox A.L.,
RA   Graham D.E., Overbeek R., Snead M.A., Keller M., Aujay M., Huber R.,
RA   Feldman R.A., Short J.M., Olsen G.J., Swanson R.V.;
RT   "The complete genome of the hyperthermophilic bacterium Aquifex aeolicus.";
RL   Nature 392:353-358(1998).
CC   -!- FUNCTION: Catalyzes the attachment of isoleucine to tRNA(Ile). As IleRS
CC       can inadvertently accommodate and process structurally similar amino
CC       acids such as valine, to avoid such errors it has two additional
CC       distinct tRNA(Ile)-dependent editing activities. One activity is
CC       designated as 'pretransfer' editing and involves the hydrolysis of
CC       activated Val-AMP. The other activity is designated 'posttransfer'
CC       editing and involves deacylation of mischarged Val-tRNA(Ile).
CC       {ECO:0000255|HAMAP-Rule:MF_02002}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-isoleucine + tRNA(Ile) = AMP + diphosphate + L-
CC         isoleucyl-tRNA(Ile); Xref=Rhea:RHEA:11060, Rhea:RHEA-COMP:9666,
CC         Rhea:RHEA-COMP:9695, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:58045, ChEBI:CHEBI:78442, ChEBI:CHEBI:78528,
CC         ChEBI:CHEBI:456215; EC=6.1.1.5; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_02002};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_02002};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_02002};
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_02002}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_02002}.
CC   -!- DOMAIN: IleRS has two distinct active sites: one for aminoacylation and
CC       one for editing. The misactivated valine is translocated from the
CC       active site to the editing site, which sterically excludes the
CC       correctly activated isoleucine. The single editing site contains two
CC       valyl binding pockets, one specific for each substrate (Val-AMP or Val-
CC       tRNA(Ile)). {ECO:0000255|HAMAP-Rule:MF_02002}.
CC   -!- SIMILARITY: Belongs to the class-I aminoacyl-tRNA synthetase family.
CC       IleS type 1 subfamily. {ECO:0000255|HAMAP-Rule:MF_02002}.
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DR   EMBL; AE000657; AAC06614.1; -; Genomic_DNA.
DR   PIR; G70327; G70327.
DR   RefSeq; NP_213211.1; NC_000918.1.
DR   RefSeq; WP_010880149.1; NC_000918.1.
DR   AlphaFoldDB; O66651; -.
DR   SMR; O66651; -.
DR   STRING; 224324.aq_305; -.
DR   EnsemblBacteria; AAC06614; AAC06614; aq_305.
DR   KEGG; aae:aq_305; -.
DR   PATRIC; fig|224324.8.peg.249; -.
DR   eggNOG; COG0060; Bacteria.
DR   HOGENOM; CLU_001493_7_0_0; -.
DR   InParanoid; O66651; -.
DR   OrthoDB; 9810365at2; -.
DR   Proteomes; UP000000798; Chromosome.
DR   GO; GO:0005829; C:cytosol; IBA:GO_Central.
DR   GO; GO:0002161; F:aminoacyl-tRNA editing activity; IEA:InterPro.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004822; F:isoleucine-tRNA ligase activity; IBA:GO_Central.
DR   GO; GO:0000049; F:tRNA binding; IEA:InterPro.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006428; P:isoleucyl-tRNA aminoacylation; IBA:GO_Central.
DR   CDD; cd07960; Anticodon_Ia_Ile_BEm; 1.
DR   CDD; cd00818; IleRS_core; 1.
DR   Gene3D; 1.10.730.20; -; 1.
DR   Gene3D; 3.40.50.620; HUPs; 2.
DR   Gene3D; 1.10.10.830; Ile-tRNA synthetase CP2 domain-like; 1.
DR   Gene3D; 3.90.740.10; Valyl/Leucyl/Isoleucyl-tRNA synthetase, editing domain; 1.
DR   HAMAP; MF_02002; Ile_tRNA_synth_type1; 1.
DR   InterPro; IPR001412; aa-tRNA-synth_I_CS.
DR   InterPro; IPR002300; aa-tRNA-synth_Ia.
DR   InterPro; IPR033708; Anticodon_Ile_BEm.
DR   InterPro; IPR002301; Ile-tRNA-ligase.
DR   InterPro; IPR023585; Ile-tRNA-ligase_type1.
DR   InterPro; IPR013155; M/V/L/I-tRNA-synth_anticd-bd.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   InterPro; IPR009080; tRNAsynth_Ia_anticodon-bd.
DR   InterPro; IPR009008; Val/Leu/Ile-tRNA-synth_edit.
DR   InterPro; IPR010663; Znf_FPG/IleRS.
DR   NCBIfam; TIGR00392; ileS; 1.
DR   PANTHER; PTHR42765:SF1; ISOLEUCINE--TRNA LIGASE, MITOCHONDRIAL; 1.
DR   PANTHER; PTHR42765; SOLEUCYL-TRNA SYNTHETASE; 1.
DR   Pfam; PF08264; Anticodon_1; 1.
DR   Pfam; PF00133; tRNA-synt_1; 1.
DR   Pfam; PF06827; zf-FPG_IleRS; 1.
DR   PRINTS; PR00984; TRNASYNTHILE.
DR   SUPFAM; SSF47323; Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases; 1.
DR   SUPFAM; SSF52374; Nucleotidylyl transferase; 1.
DR   SUPFAM; SSF50677; ValRS/IleRS/LeuRS editing domain; 1.
DR   PROSITE; PS00178; AA_TRNA_LIGASE_I; 1.
PE   3: Inferred from homology;
KW   Aminoacyl-tRNA synthetase; ATP-binding; Cytoplasm; Ligase; Metal-binding;
KW   Nucleotide-binding; Protein biosynthesis; Reference proteome; Zinc.
FT   CHAIN           1..956
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_0000098341"
FT   MOTIF           60..70
FT                   /note="'HIGH' region"
FT   MOTIF           624..628
FT                   /note="'KMSKS' region"
FT   BINDING         583
FT                   /ligand="L-isoleucyl-5'-AMP"
FT                   /ligand_id="ChEBI:CHEBI:178002"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         627
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         921
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         924
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         938
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         941
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ   SEQUENCE   956 AA;  111315 MW;  E34E14CAB46C8AFD CRC64;
     MEEKKVDLKD TLNLPRTEFP MKANLPQREP QILEKWKGLY EKIQKERKGR EVFVLHDGPP
     YANGHIHVGH ALNKILKDVI NKYNLLIGKN VNFIPGWDCH GLPIERAVEK ELSKKKIKKE
     SLPKTEFREL CREYAKKYVN IQREDFVRLG VLGDWEHPYL TMDPKYEAQE IRELGKFFER
     GLAYRSKKPV YWCIYDKTAE AEAEVEYYEK EDPSIYVKFP LKSGEKFGIK DKKVFAIIWT
     TTPWTLPANL GIMVKEDADY VLVEVEDEVW IVAKELMDKF FETVNRPEGL VLETVKGKDL
     VGLEYTHPFV EKEKLKGHLS EETLKNMWKI YPSEFVSLDT GTGLVHMAPG HGQEDYVVGQ
     RYGLEPYAPV SDEGRFVEPA PEFLINVRVF DANHLIVGVL KEKGFLVHEE KIRHSYPHCW
     RCKNPVIFRA TPQWFIGMDI EFFGKTLRQR ALEEIEKVKW IPEYGKNRIK SMVENRPDWC
     ISRQRFWGVP ITVFYCENCG EIIKDREVFE RVAQLVENSE KGSDVWFELT SSQLLPEGYK
     CPKCGGDSFT KEEDILDVWF DSGCSHAAVI RPLGFQKADL YLEGSDQHRG WFQASLLESV
     GSYLEAPYKA VLTHGFIVDE KGRKMSKSLG NVISPQEVVK EFGADILRLW VVSEDYTEDV
     KLGKNLLKKI ADDYRKIRNT LRFIIGNLYD FNPRTNALPF EKLHHFDRWI ISELQNLLKK
     VHENYEKFLF YRVHNHIKNF VITTLSAIYL DVLKDRLYVY APASWERRSA QTALWHLLIA
     LTTSTAPYLS FTAEELWEHV GKLDPSLPES VFLYEMPKPD ENLKDEEVLK DYEILLKVRD
     EVMRALEVAR KEKGIIKHPY EAKVYIRGDE SVESLLKKYE DYLNFFFTVS QVELREGGEV
     QIEGEELPVK VGVNKAEGEK CPRCWIYYQK EEFVGCVCKR CAKALSEMGI ELNAVC
//