ID   SYI_THEPX               Reviewed;         932 AA.
AC   B0K2W1;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   18-MAR-2008, sequence version 1.
DT   27-MAR-2024, entry version 98.
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=Teth514_1886;
OS   Thermoanaerobacter sp. (strain X514).
OC   Bacteria; Bacillota; Clostridia; Thermoanaerobacterales;
OC   Thermoanaerobacteraceae; Thermoanaerobacter.
OX   NCBI_TaxID=399726;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=X514;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Bruce D., Goodwin L., Saunders E., Brettin T.,
RA   Detter J.C., Han C., Schmutz J., Larimer F., Land M., Hauser L.,
RA   Kyrpides N., Kim E., Hemme C., Fields M.W., He Z., Zhou J., Richardson P.;
RT   "Complete sequence of Thermoanaerobacter sp. X514.";
RL   Submitted (JAN-2008) 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_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; CP000923; ABY93166.1; -; Genomic_DNA.
DR   RefSeq; WP_009052491.1; NC_010320.1.
DR   AlphaFoldDB; B0K2W1; -.
DR   SMR; B0K2W1; -.
DR   KEGG; tex:Teth514_1886; -.
DR   HOGENOM; CLU_001493_7_0_9; -.
DR   Proteomes; UP000002155; 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   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; Zinc.
FT   CHAIN           1..932
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_1000189211"
FT   MOTIF           57..67
FT                   /note="'HIGH' region"
FT   MOTIF           600..604
FT                   /note="'KMSKS' region"
FT   BINDING         559
FT                   /ligand="L-isoleucyl-5'-AMP"
FT                   /ligand_id="ChEBI:CHEBI:178002"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         603
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         899
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
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         919
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT   BINDING         922
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ   SEQUENCE   932 AA;  107851 MW;  0BD53F63FE09E523 CRC64;
     MDYNKTLNLP RTDFPMKANL PTREPEILKR WEEMDIYHKT LEKNKGKEKY ILHDGPPYAN
     GDIHIGTAMN KVLKDIIVKY KTMRGYDAPY VPGWDTHGLP IEQQAIKTLG IKRHEVSPTE
     FRKVCRDFAF SQIEKQKAQF KRLGVRGDWD NPYLTLNPEY EAKQIEVFGE MAKKGYIYKG
     LKPVYWCPSC ETALAEAEIE YFDETSDSIY VKFRVKDDLG KFKGIVENLN NVYFVIWTTT
     TWTIPANLAI ALNPEFDYAL AKFGDEVYIM AKDMLDTVKK EANLSDYEIV AVFKGKDLEG
     MKATHPLYDR DSLIILGEHV TLEAGTGCVH TAPGHGEEDF LVGQEYGLEV LNPIDDKGYF
     TDKAPGYAGL YYEEANKVIK EDLKKANALV AETRITHSYP HCWRCKSPII FRATEQWFAS
     VEGFREEALK AIKEVNWYPS WGEERITNMV RDRRDWCISR QRVWGVPIPI FYCEKCGKPL
     INDDTINAVK KIFRQKGSDA WFEMSAEEIL PKGITCECGS TKFRKETDIM DVWFDSGSSH
     AAVLQTHPDL KWPAELYLEG SDQHRGWFQS SLLTSVATRG KAPYRNVLTH GFVVDGEGRK
     MSKSLGNGID PADVIKEYGA DILRLWTVSA DFTSDMRISQ EILKQMTEAY RKIRNTSKFL
     LSNLYDFDPD KDMLPYEELL EIDKWALFRL NRVVEELTEA FDKYEYYDFL HLVHTFCVVD
     MSSLYLDILK DRLYTYPATS KERRAAQTTL YIILDTLVRL IAPVLTFTSE EIWSYMKHDS
     QNNFESVQLA DWPQVQEKYN NPYIIEKWEK LFDIRKDISK ALEIARTDKK IGHSLEAQVD
     IYPSQELYDF FKGFNDLEYV FIVSKVVLHQ PEEPAPQNAY ESDDYNLKIV VTHAPGEKCE
     RCWMYSETVG TIKEHPTICA RCASHIEQQT QV
//