ID   SYI_HELHP               Reviewed;         930 AA.
AC   Q7VGX8;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   27-MAR-2024, entry version 119.
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};
GN   OrderedLocusNames=HH_1190;
OS   Helicobacter hepaticus (strain ATCC 51449 / 3B1).
OC   Bacteria; Campylobacterota; Epsilonproteobacteria; Campylobacterales;
OC   Helicobacteraceae; Helicobacter.
OX   NCBI_TaxID=235279;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 51449 / 3B1;
RX   PubMed=12810954; DOI=10.1073/pnas.1332093100;
RA   Suerbaum S., Josenhans C., Sterzenbach T., Drescher B., Brandt P., Bell M.,
RA   Droege M., Fartmann B., Fischer H.-P., Ge Z., Hoerster A., Holland R.,
RA   Klein K., Koenig J., Macko L., Mendz G.L., Nyakatura G., Schauer D.B.,
RA   Shen Z., Weber J., Frosch M., Fox J.G.;
RT   "The complete genome sequence of the carcinogenic bacterium Helicobacter
RT   hepaticus.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:7901-7906(2003).
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; AE017125; AAP77787.1; -; Genomic_DNA.
DR   RefSeq; WP_011116030.1; NC_004917.1.
DR   AlphaFoldDB; Q7VGX8; -.
DR   SMR; Q7VGX8; -.
DR   STRING; 235279.HH_1190; -.
DR   GeneID; 82135741; -.
DR   KEGG; hhe:HH_1190; -.
DR   eggNOG; COG0060; Bacteria.
DR   HOGENOM; CLU_001493_7_1_7; -.
DR   OrthoDB; 9810365at2; -.
DR   Proteomes; UP000002495; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
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; IEA:UniProtKB-UniRule.
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; IEA:UniProtKB-UniRule.
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   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   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..930
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_0000098397"
FT   MOTIF           57..67
FT                   /note="'HIGH' region"
FT   MOTIF           614..618
FT                   /note="'KMSKS' region"
FT   BINDING         573
FT                   /ligand="L-isoleucyl-5'-AMP"
FT                   /ligand_id="ChEBI:CHEBI:178002"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         617
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         902
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         905
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         918
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
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"
SQ   SEQUENCE   930 AA;  106646 MW;  FBBDA80B50BE692E CRC64;
     MDYKETLILP DTSFPMRGNL PANEPHTYAK WRDEKLYSKL KNAHSGAKNF CLHDGPPYAN
     GHLHIGHALN KILKDIIVKY HYFKGENIRY TPGWDCHGLP IEQQVEQKIG KAKKDNLNKT
     KLRELCRNHA QKFIQIQSDE FQALGVLGDF ENPYKTMDFA FEAQIYRSLI ELVKEGLLAE
     RSKPIYWSWA CETALADAEV EYQDKQSDSI FVAFTLSDSA LQSLGISQGK VIIWTTTPWT
     LPANVGIALN PSESYVLTDK GYIVAKALLE KVCENIDIGI SKREFKAQEF ERLEAINPLN
     GRTSLIVLGE HVSINDGTGA VHTAPGHGED DYYIGLKYGL EVIMPVDDRG NFSPLIESMG
     LVPKEFANEF VGKNIFDTHE SIFKILGKAL LKQDVITHSY PHCWRSHKPV IYRATAQWFI
     LLDKPFYQGK TLKELALEEL DKVRFYPQNG KNRIYSMIEN RPDWCISRQR DWGVPIAFLI
     DKITNVALLD EAVLEHIACI FEKEGCDAWW SYEIKDLLPP SHKHLAENLT KSKHILDVWF
     DSGSTWSAVL ENEYKGAGNN YDAGSHPADM YLEGSDQHRG WFQSSLLLSC AIAKRAPYKQ
     ILTHGFTFDR NGEKMSKSKG NVISPSEIIK TQGSEILRLW VALSHYQSDQ NISDEILKQV
     GEQYRKIRNT IRFLLANASQ NSQDMVEKDE LDVIDRWILS VCDRVFDEAY EYFDEYEFAK
     AFQVVMSFLI NELSGIYLDL CKDILYCDDV SSLRRRAIQS ALVMILRRVL HFIAPVLTYT
     ADEAFRHSSA ALKGEYESIF DLPKLSCAQG YNLEINEDFT RLLRVREKFT ESLDNLKKQK
     IVKSSLEVLL QSPQEKEFAL LDRWLIVSGV CGKECKDKEE LARFMLEDKE EFVIYRAQNG
     RCERCWQFIV EESEGKLCKR CTSVIAQTKK
//