ID   SYI_HAEIE               Reviewed;         941 AA.
AC   A5UDA6;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   10-JUL-2007, sequence version 1.
DT   03-AUG-2022, entry version 94.
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=CGSHiEE_07150;
OS   Haemophilus influenzae (strain PittEE).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=374930;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PittEE;
RX   PubMed=17550610; DOI=10.1186/gb-2007-8-6-r103;
RA   Hogg J.S., Hu F.Z., Janto B., Boissy R., Hayes J., Keefe R., Post J.C.,
RA   Ehrlich G.D.;
RT   "Characterization and modeling of the Haemophilus influenzae core and
RT   supragenomes based on the complete genomic sequences of Rd and 12 clinical
RT   nontypeable strains.";
RL   Genome Biol. 8:R103.1-R103.18(2007).
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;
CC         Evidence={ECO:0000255|HAMAP-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; CP000671; ABQ98757.1; -; Genomic_DNA.
DR   RefSeq; WP_005686230.1; NC_009566.1.
DR   AlphaFoldDB; A5UDA6; -.
DR   SMR; A5UDA6; -.
DR   KEGG; hip:CGSHiEE_07150; -.
DR   HOGENOM; CLU_001493_7_0_6; -.
DR   OMA; HLGTAWN; -.
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   Gene3D; 3.40.50.620; -; 2.
DR   Gene3D; 3.90.740.10; -; 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   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; SSF47323; 1.
DR   SUPFAM; SSF50677; SSF50677; 1.
DR   TIGRFAMs; TIGR00392; ileS; 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..941
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_1000022072"
FT   MOTIF           59..69
FT                   /note="'HIGH' region"
FT   MOTIF           603..607
FT                   /note="'KMSKS' region"
FT   BINDING         562
FT                   /ligand="L-isoleucyl-5'-AMP"
FT                   /ligand_id="ChEBI:CHEBI:178002"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         606
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         904
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         907
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         927
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ   SEQUENCE   941 AA;  106676 MW;  CCC0897EAAE0AF17 CRC64;
     MTVDYKNTLN LPETSFPMRG DLAKREPDML KNWYEKNLYQ KIRKASKGKK SFILHDGPPY
     ANGNIHIGHA VNKILKDIII KSKTALGFDS PYIPGWDCHG LPIELKVEGL VGKPNEKISA
     AEFRQKCREY ASEQVEGQKK DFIRLGVLGD WDNPYLTMNF DTEANIIRTL GKVIENGHLY
     KGSKPVHWCL DCGSSLAEAE VEYEDKVSPS IYVRFPVESA DEIEAKFSAQ GRGQGKLSAI
     IWTTTPWTMP SNRAIAVNAD LEYNLVQLGD ERVILAAELV ESVAKAVGVE QVKILGSVKG
     ADLELSRFHH PFYDFTVPVI LGDHVTTDGG TGLVHTAPDH GLDDFIVGKQ YDLPMAGLVS
     NDGKFISMTE FFAGKGVFEA NPLVIEKLQE VGNLLKVEKI KHSYPHCWRH KTPIIFRATP
     QWFIGMETQG LRQQALGEIK QVRWIPDWGQ ARIEKMVENR PDWCISRQRT WGVPMTLFVH
     KETEELHPRT LDLLEEVAKR VERAGIQAWW DLDEKELLGA DAETYRKVPD TLDVWFDSGS
     TYSSVVANRL EFNGQNIDMY LEGSDQHRGW FMSSLMLSTA TDSKAPYKQV LTHGFTVDGQ
     GRKMSKSIGN IVTPQEVMDK FGGDILRLWV ASTDYTGEMT VSDEILKRAA DSYRRIRNTA
     RFLLANLNGF DPKRDLVKPE EMISLDRWAV ACALDAQHEI KDAYDNYQFH TVVQRLMRFC
     SVEMGSFYLD IIKDRQYTTK ASSLARRSCQ TALWHIAEAL VRWMAPILSF TADEIWQHLP
     QTESARAEFV FTEEFYQGLF GLGENEKLDD AYWQQLIKVR SEVNRVLEIS RNNKEIGGGL
     EAEVTLYAND EYRALLEQLG NELRFVLITS KVDVKSLSEK PADLADSELE GITVSVTRSN
     AEKCPRCWHY SDKIGVNPEH PMLCPRCVEN VVGNGEVRHF A