ID   SYI_PYRHO               Reviewed;        1066 AA.
AC   O58792;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   27-MAR-2024, entry version 138.
DE   RecName: Full=Isoleucine--tRNA ligase {ECO:0000255|HAMAP-Rule:MF_02003};
DE            EC=6.1.1.5 {ECO:0000255|HAMAP-Rule:MF_02003};
DE   AltName: Full=Isoleucyl-tRNA synthetase {ECO:0000255|HAMAP-Rule:MF_02003};
DE            Short=IleRS {ECO:0000255|HAMAP-Rule:MF_02003};
GN   Name=ileS {ECO:0000255|HAMAP-Rule:MF_02003}; OrderedLocusNames=PH1065;
OS   Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC
OS   100139 / OT-3).
OC   Archaea; Euryarchaeota; Thermococci; Thermococcales; Thermococcaceae;
OC   Pyrococcus.
OX   NCBI_TaxID=70601;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3;
RX   PubMed=9679194; DOI=10.1093/dnares/5.2.55;
RA   Kawarabayasi Y., Sawada M., Horikawa H., Haikawa Y., Hino Y., Yamamoto S.,
RA   Sekine M., Baba S., Kosugi H., Hosoyama A., Nagai Y., Sakai M., Ogura K.,
RA   Otsuka R., Nakazawa H., Takamiya M., Ohfuku Y., Funahashi T., Tanaka T.,
RA   Kudoh Y., Yamazaki J., Kushida N., Oguchi A., Aoki K., Yoshizawa T.,
RA   Nakamura Y., Robb F.T., Horikoshi K., Masuchi Y., Shizuya H., Kikuchi H.;
RT   "Complete sequence and gene organization of the genome of a hyper-
RT   thermophilic archaebacterium, Pyrococcus horikoshii OT3.";
RL   DNA Res. 5:55-76(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_02003}.
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_02003};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_02003};
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_02003}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_02003}.
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_02003}.
CC   -!- SIMILARITY: Belongs to the class-I aminoacyl-tRNA synthetase family.
CC       IleS type 2 subfamily. {ECO:0000255|HAMAP-Rule:MF_02003}.
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DR   EMBL; BA000001; BAA30164.1; -; Genomic_DNA.
DR   PIR; F71100; F71100.
DR   RefSeq; WP_010885154.1; NC_000961.1.
DR   AlphaFoldDB; O58792; -.
DR   SMR; O58792; -.
DR   STRING; 70601.gene:9378024; -.
DR   EnsemblBacteria; BAA30164; BAA30164; BAA30164.
DR   GeneID; 1443389; -.
DR   KEGG; pho:PH1065; -.
DR   eggNOG; arCOG00807; Archaea.
DR   OrthoDB; 30823at2157; -.
DR   Proteomes; UP000000752; 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; cd07961; Anticodon_Ia_Ile_ABEc; 1.
DR   CDD; cd00818; IleRS_core; 1.
DR   Gene3D; 3.30.720.200; -; 1.
DR   Gene3D; 3.40.50.620; HUPs; 2.
DR   Gene3D; 3.90.740.10; Valyl/Leucyl/Isoleucyl-tRNA synthetase, editing domain; 1.
DR   HAMAP; MF_02003; Ile_tRNA_synth_type2; 1.
DR   InterPro; IPR001412; aa-tRNA-synth_I_CS.
DR   InterPro; IPR002300; aa-tRNA-synth_Ia.
DR   InterPro; IPR033709; Anticodon_Ile_ABEc.
DR   InterPro; IPR002301; Ile-tRNA-ligase.
DR   InterPro; IPR023586; Ile-tRNA-ligase_type2.
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; PTHR42780:SF1; ISOLEUCINE--TRNA LIGASE, CYTOPLASMIC; 1.
DR   PANTHER; PTHR42780; SOLEUCYL-TRNA SYNTHETASE; 1.
DR   Pfam; PF08264; Anticodon_1; 1.
DR   Pfam; PF19302; DUF5915; 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; 2.
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; Zinc.
FT   CHAIN           1..1066
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_0000098590"
FT   MOTIF           49..59
FT                   /note="'HIGH' region"
FT   MOTIF           625..629
FT                   /note="'KMSKS' region"
FT   BINDING         628
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02003"
SQ   SEQUENCE   1066 AA;  125941 MW;  4C9444C82BB14018 CRC64;
     MIKEPEFRDY TPGKLEEKIE EFWKENNIYQ KIKELRKNGP KYYFLDGPPY VSGAIHLGTA
     WNKIIKDMII RFRTMQGYNV WRQPGFDMHG LPIEVKVEQA LGLKTKKEIE EKIGVENFIK
     KCKEFALNNL KIMTEQFKML GIWMDWDDPY MTIKNEYIES AWFTLKKAWE KGLLEKDKRV
     LHWCPRCETA LAEHEVRGEY KLRKDPSIYV KFPIEGKENE YLLIWTTTPW TLPANLAVSA
     HPEYDYVKVK VEFNGKEEYW ILAKALVDKV LGEIGVKGEV IEEFKGRELE GLRYIHVLMD
     EYPRQKEFRE KYEWAHRIIL ADFVTLEEGT GLVHTAPGHG EEDFEVGKKY GLPIYSPVDD
     QGRYVEGKWK GIYVKEADPQ IIEHLKEKGY LVKAGEIEHK YPHCWRCKTP LIFRATDQWF
     LKVSKVKDRI IKENDEKVTW YPDWVKIRFD NGVRDSGDWV ISRQRYWGIP LPIWQSEDGE
     IYVVGSWREL VELAVAIEVN GERIDLPESY EEKLKVIEEK LGPEDLHRPY VDAFIIKVNG
     KEMRRVKDVV DVWFDSGIAS WASLGYPRNK ELFEKLWPAD FIVEGEDQVT KWFYSQQAAS
     VIAFDTVPYR RVAMHGYVLD EKGDKMSKSL GNIIRPEEVV EKAGRDTFRF YMLWATNPWE
     NLKFSWKGVE QVRRMLNILW NVYVLSATYM SLDNFDPRNV KVEELAFREE DKWILSRVNS
     LIREVENGIE TFYLTKATRA LYNFVVEDLS RWYVRLIRKR LWVEGDDPDK LAAYYTLWKV
     FDVLLRLMAP FTPYITEEIY QNLMRPFIGI ESVHMLDWPK VDESAVDEDL EKEMEFIRRI
     VEAGSAARQK ARIKLRYPVR KIIIETQDET VKKAVERLNY ILRDQLNAKE VVIGKVEREL
     TVKPNFAKVG PEFKGDSRLV AKWINEHGLE LYEKGEVDVE IEGKKFHLTR EHIIVEEKLP
     DFLVAEDFEG GRVYVDKTLT RELLAEGLAR EFVRRIQEMR KRLDLDVNDR IVVTIETTDD
     NRELLQENLD YIMRETRAIE VRFEEAKGYV VEWPEVQAKI GIEKVE
//