ID   SYI_RICB8               Reviewed;        1108 AA.
AC   A8GW18;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 86.
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=A1I_03430;
OS   Rickettsia bellii (strain OSU 85-389).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC   Rickettsiaceae; Rickettsieae; Rickettsia; belli group.
OX   NCBI_TaxID=391896;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=OSU 85-389;
RA   Madan A., Lee H., Madan A., Yoon J.-G., Ryu G.-Y., Dasch G., Ereemeva M.;
RT   "Complete genome sequencing of Rickettsia bellii.";
RL   Submitted (SEP-2007) to the EMBL/GenBank/DDBJ databases.
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;
CC         Evidence={ECO:0000255|HAMAP-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; CP000849; ABV79045.1; -; Genomic_DNA.
DR   RefSeq; WP_012151808.1; NC_009883.1.
DR   AlphaFoldDB; A8GW18; -.
DR   SMR; A8GW18; -.
DR   KEGG; rbo:A1I_03430; -.
DR   HOGENOM; CLU_001493_1_1_5; -.
DR   OMA; KMMAPFT; -.
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   Gene3D; 3.40.50.620; -; 2.
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; IPR022439; RPE4.
DR   InterPro; IPR009080; tRNAsynth_Ia_anticodon-bd.
DR   InterPro; IPR009008; Val/Leu/Ile-tRNA-synth_edit.
DR   PANTHER; PTHR42780; PTHR42780; 1.
DR   Pfam; PF08264; Anticodon_1; 1.
DR   Pfam; PF00133; tRNA-synt_1; 1.
DR   PRINTS; PR00984; TRNASYNTHILE.
DR   SUPFAM; SSF47323; SSF47323; 1.
DR   SUPFAM; SSF50677; SSF50677; 1.
DR   TIGRFAMs; TIGR00392; ileS; 1.
DR   TIGRFAMs; TIGR03777; RPE4; 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..1108
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_1000022159"
FT   MOTIF           53..63
FT                   /note="'HIGH' region"
FT   MOTIF           654..658
FT                   /note="'KMSKS' region"
FT   BINDING         657
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02003"
SQ   SEQUENCE   1108 AA;  127564 MW;  641A2AE9DC46BAB4 CRC64;
     MTNTKYYPEV SSNADFATIE KEILKFWQDN NIFQKSIDIR EGDAEFIFYD GPPFANGLPH
     YGHLLTGFIK DVYARYQTVR GKKVERRFGW DCHGLPAEMQ SEKELGISGH LAITNFGIEK
     FNAHCRDSVM KYAGEWEQYV TRQARWVDFK NSYKTMDKNF MESVLWAFKE LYNKGLLYES
     MRVMPYSWAC ETPLSNFETR LDNSYRERAD KAVTVSFVLC HPVSKSTLDV IPWLDHGIQK
     TINNDSANCS MDPVDKPRYD TENFLGITAN YKEYRILAWT TTTWTLPSNL ALAVGSDIDY
     ALVPKGDVCY IIAASSVSKY AKELELKGDE QFTIIKGSEL QGLSYKPLFD YFKNHPNSFK
     IFAGDFVVEG DGTGVVHMAP GFGEDDQILC ESKGIKLVCP VDNSGKFTKE IPDLEGLQVF
     DANDKIIIKL KEQGNWLKTE QYIHNYPHCW RTDTPLIYKA VPSWYVKVTE FKDRMVELNQ
     QINWIPTHVK DNLFGKWLEN ARDWSISRNR FWGTPLPVWK SDDPKYPRID VYGSIEELEK
     DFGVKITDLH RPFIDELTRA NPDDPTGKST MRRIEDVFDC WFESGSMPYG QAHYPFENKQ
     WFEEHFPADF IVEYSAQTRG WFYTLMVLST ALFDRPPFLN CICHGVILDA TGQKLSKRLN
     NYADPLELFD KYGSDALRVT MLSSNVVKGQ ELLIDKDGKM VFDTLRLFIK PIWNAYHFFT
     MYANADHIKG ELNFTSENVL DVYILSKLKI AVEKIKESLD SFDTGTAYHA VSEFFEVLNN
     WYIRRSRARF WKSEKDADKQ SAYNTLYTCL ETMAIAMSSL VPLISEAIYL GLYCHPRKSG
     DPEKPECLDS RLCGNDNLSV HLCDYPDLSK FKINSELVDT MDTVLDICNH SLFIRSSENA
     RVRQPLSSIT IISKNNDKLK SFEDLIKDEI NVKSVIYRDD LENYAVKKLS INFPLLGKRL
     PAKMKDIIAA SKKNEWEVTS GSLIICNETL NSDEYKLILE PHSHIKGASS FAHNSSLLIL
     DLELTPELID EGIARDIVRF IQQARKNADF AITDRILIDI NLPKITDIYG EFIKEQTLGK
     FAKDFIPDHI SEIELDNHKL QLKIKKVN