SYI_ALKCK
ID SYI_ALKCK Reviewed; 923 AA.
AC Q5WFI3;
DT 20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT 23-NOV-2004, sequence version 1.
DT 03-AUG-2022, entry version 116.
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}; OrderedLocusNames=ABC2342;
OS Alkalihalobacillus clausii (strain KSM-K16) (Bacillus clausii).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Alkalihalobacillus.
OX NCBI_TaxID=66692;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=KSM-K16;
RA Takaki Y., Kageyama Y., Shimamura S., Suzuki H., Nishi S., Hatada Y.,
RA Kawai S., Ito S., Horikoshi K.;
RT "The complete genome sequence of the alkaliphilic Bacillus clausii KSM-
RT K16.";
RL Submitted (OCT-2003) 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;
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; AP006627; BAD64877.1; -; Genomic_DNA.
DR RefSeq; WP_011247185.1; NC_006582.1.
DR AlphaFoldDB; Q5WFI3; -.
DR SMR; Q5WFI3; -.
DR STRING; 66692.ABC2342; -.
DR EnsemblBacteria; BAD64877; BAD64877; ABC2342.
DR KEGG; bcl:ABC2342; -.
DR eggNOG; COG0060; Bacteria.
DR HOGENOM; CLU_001493_7_1_9; -.
DR OMA; HLGTAWN; -.
DR OrthoDB; 32262at2; -.
DR Proteomes; UP000001168; 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 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; Reference proteome; Zinc.
FT CHAIN 1..923
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_0000098348"
FT MOTIF 57..67
FT /note="'HIGH' region"
FT MOTIF 594..598
FT /note="'KMSKS' region"
FT BINDING 553
FT /ligand="L-isoleucyl-5'-AMP"
FT /ligand_id="ChEBI:CHEBI:178002"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 597
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 888
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 891
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 908
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 911
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ SEQUENCE 923 AA; 104537 MW; E25EFE72971B29FD CRC64;
MDYKQTLLMP KTAFPMRGNL PNSEPKRQEQ WEEMDIYKQV QERTEGRPYF VLHDGPPYAN
GDIHMGHALN KIIKDFIVRY KSMSGFHAPY VPGWDTHGLP IETALTKNKK VDRKSMSIAD
FRKLCEEYAL EQINSQRQQF MRLGVRGDWW KPYITLEKEF EAEQIKVFGK MAKKGYIYKG
KKPVYWSPSS ESALAEAEIE YYDKRSASIY VAFQVADGKG VLPEDAALVI WTTTPWTIPA
NLGITVHPQL EYSVVRTGGR SFVVASGLLE HVQTELSWED VVVEKTVTGK ELDYIVCRHP
FYDRDSIVMN GEHVTLDAGT GCVHTAPGHG VDDFVVGQKY GLDVLCPIDD KGIMTSEAPG
FEGEFYDNIN KMVTEKLEAV GALLKLGFIT HSYPHDWRTK KPVIFRATSQ WFASIANIRK
ELLQAVANTE WIPAWGETRL HNMVRDRGDW CISRQRAWGV PIPVFYGEDG TEIVSEETIE
HVSNLFREHG SNVWFEREAK DLLPPGFTSP HSPNGHFTKE TDIMDVWFDS GSSHQGVLRE
RNDLVFPADL YFEGSDQYRG WFNSSLSTSV AINGVAPYKG VLSHGFVMDG EGKKMSKSLG
NIVVPNTVMK QLGADILRLW VASVDYQADS RVSDSILKQV AETYRKIRNT FRFLLGNLHD
FDPKINAVPR DQLTGVHAFL LVRLNELTKR MHEGYNEYQF LNVYNHFRNF CTVELSSFYM
DISKDTLYIE HADHPERRAF QTVMYEVVTA LTKLIAPILP HTADEVWENI PGVSEQSVQL
TDMPTAEELS GTDELKAHWQ AFMDIRADVL KALEVARNEK VIGKSLQASL TLYPNKQARA
LLEATEGLKK LFIVSNVQIA NEGDEVPAAA QQFADVAVLV EKAEGETCER CWQVSNTVGA
DEKHPTLCLS CAQTVTNHYN DVV
