ID   SYI_METB6               Reviewed;        1076 AA.
AC   A7IAM2;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-SEP-2007, sequence version 1.
DT   03-AUG-2022, entry version 87.
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=Mboo_2269;
OS   Methanoregula boonei (strain DSM 21154 / JCM 14090 / 6A8).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanomicrobiales; Methanoregulaceae; Methanoregula.
OX   NCBI_TaxID=456442;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 21154 / JCM 14090 / 6A8;
RX   PubMed=25998264; DOI=10.1099/mic.0.000117;
RA   Braeuer S., Cadillo-Quiroz H., Kyrpides N., Woyke T., Goodwin L.,
RA   Detter C., Podell S., Yavitt J.B., Zinder S.H.;
RT   "Genome of Methanoregula boonei 6A8 reveals adaptations to oligotrophic
RT   peatland environments.";
RL   Microbiology 161:1572-1581(2015).
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; CP000780; ABS56783.1; -; Genomic_DNA.
DR   RefSeq; WP_012107843.1; NC_009712.1.
DR   AlphaFoldDB; A7IAM2; -.
DR   SMR; A7IAM2; -.
DR   STRING; 456442.Mboo_2269; -.
DR   PRIDE; A7IAM2; -.
DR   EnsemblBacteria; ABS56783; ABS56783; Mboo_2269.
DR   GeneID; 5411001; -.
DR   KEGG; mbn:Mboo_2269; -.
DR   eggNOG; arCOG00807; Archaea.
DR   HOGENOM; CLU_001493_1_1_2; -.
DR   OMA; HLGTAWN; -.
DR   OrthoDB; 4914at2157; -.
DR   Proteomes; UP000002408; 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   Gene3D; 3.40.50.620; -; 2.
DR   Gene3D; 3.90.740.10; -; 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   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   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..1076
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_1000022151"
FT   MOTIF           47..57
FT                   /note="'HIGH' region"
FT   MOTIF           591..595
FT                   /note="'KMSKS' region"
FT   BINDING         594
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02003"
SQ   SEQUENCE   1076 AA;  122648 MW;  FD3F722F961446C5 CRC64;
     MKEVTANFSA KDIEREVQEY WRTHDTYKAV KEQHSAGRAF FFVDGPPYTT GQIHLGTAWN
     KIIKDSILRY HRMNGRNVID RAGYDMHGLP IEVKVEQKLG FASKKDIETF GIEKFINECR
     EFAIKNKELM DAQFENLGIW MDFKNAYQTI KPWYVEAAWW TLAKAQEKGM LERGYRVVNW
     CPRCETAIAD AEVEYWDETD PSVFVKFPIR GKVSESLVIW TTTPWTLPAN VAVAVGKEFV
     YARVHAEKNG REEYLWVAED LVKSVLKKGR YQKFETLETK KGAELIGWEY DSPLMDVVPI
     QKEIAHRVVA ADFVAMENTG MVHIAPGHGW DDYVLGTKEK LAIVCPVDGA GKFRPETGIF
     AGKFVRDANG EVLDALGERL LATEKITHRY GHCWRCKTPI IFRATSQWFL KASEMRDLML
     SEVKKVTWYP EWAGSARFYD WIKEARDWCV SRQRYWGIPI PVWICDKCDK YRVIGTIAEL
     EKASGQKVPD PHRPFVDQVT IPCECGGTMK RVGDIFDVWF DSAVASWATV GFPAKTDEFE
     KLWPADFITE GQDQTRGWFY SQLGASTIAF GKAPYKSVCM HGFALDAEGR KMSKSLGNVV
     APEEVIAKVG VDVLRLYVLS SSAPWDDLKF NWDGIATVNR TMNILWNVYR FPMPYMILDR
     FEPEAKSGHW DGSFVRSHIR ELPDEDRWIV SRINTVAGIV DASTKECQLH RATREILNFI
     LEDLSRWYVQ LVRPRMWLEG ESEQKIFAYE TIYYVMRRLV DLMAPFAPHI TEEIYSNLRC
     KNDPGSVHML DWQACDDALT NRELEHAMEL VRSFDDAVQN ARQAGKRKLR WPVDEVVIVT
     AKPEVKDAVA RLNEVCMDRA NARKVTVVIG RWDRIGWHAE PVMKALGKGF GKNSFAVKGL
     IEAADGNAIK AAVDAGQKFQ LKIEEGKISK PDDLKIGTDY EQDVVEIGIE HVRFTEKLPT
     DIFSAPMEDG TVYVDVALTP DLEAEGYARE IIRRIQEMRR QLDLAVEDFI MVDVAVADKR
     ICELVGASWK PGIADEVRAK TLSLHHSAEP AGSSHQLAKD WDVEGIAMTI GISKVA