SYI_LACH4
ID SYI_LACH4 Reviewed; 927 AA.
AC A8YUP7;
DT 26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT 15-JAN-2008, sequence version 1.
DT 03-AUG-2022, entry version 88.
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=lhv_0863;
OS Lactobacillus helveticus (strain DPC 4571).
OC Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC Lactobacillus.
OX NCBI_TaxID=405566;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DPC 4571;
RX PubMed=17993529; DOI=10.1128/jb.01295-07;
RA Callanan M., Kaleta P., O'Callaghan J., O'Sullivan O., Jordan K.,
RA McAuliffe O., Sangrador-Vegas A., Slattery L., Fitzgerald G.F.,
RA Beresford T., Ross R.P.;
RT "Genome sequence of Lactobacillus helveticus: an organism distinguished by
RT selective gene loss and IS element expansion.";
RL J. Bacteriol. 190:727-735(2008).
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; CP000517; ABX26985.1; -; Genomic_DNA.
DR RefSeq; WP_012211704.1; NC_010080.1.
DR AlphaFoldDB; A8YUP7; -.
DR SMR; A8YUP7; -.
DR STRING; 405566.lhv_0863; -.
DR PRIDE; A8YUP7; -.
DR EnsemblBacteria; ABX26985; ABX26985; lhv_0863.
DR KEGG; lhe:lhv_0863; -.
DR eggNOG; COG0060; Bacteria.
DR HOGENOM; CLU_001493_7_1_9; -.
DR OMA; HLGTAWN; -.
DR Proteomes; UP000000790; 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 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..927
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_1000073710"
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 886
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 889
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 906
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 909
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ SEQUENCE 927 AA; 106225 MW; 820EF079C2C2EC87 CRC64;
MKIKDTLNLG KTKFKMRGNL PVREAEWQKQ WRENKLYEQR LKLNEGKPRF DLHDGPPFAN
GNIHMGHALN KISKDIIVRY KNMNGYYAPY VPGWDTHGLP VEQQLAKKGV DRKTMDRAKY
RELCRQYAEE QVQKQMTDFK RLGVMADWDH PYITLQHDFE AQEIRVFGEM FKKGYIYKGK
KPVYWSWSSE STLAEAEVEY KDVEANSIFV AFPVTDGKGI IDPKDTYFVI WTTTPWTIPA
NEAICVNPKF DYSVVQVGDK RYVVASGLLD KVAEEIGWDD YKVVQTVKGA DMEYMKAKHP
IYDKESLVIE GFHVTLDDGT GLVHTAPGFG EDDFNVGQRY NLPIFSPVDA HGCYTDEVPE
LKGMFYQDVD KLMVQKLKDA GALLKLKIFT HSYPHDWRTK KPVIFRATTQ WFASIAPFRD
QILDQIEKAS FIPSWGKTRL YNMIKDRGDW VISRQRAWGV PLPIFYAEDG TPIVTPETIE
HIAKIFEKEG SNAWYTHTAK ELLPEGFTSE HSPNGEFTKE KDILDVWFDS GSSWSGVMEK
RDGLHYPADL YLEGSDQYRG WFNSSLITSV AVTGQAPYKQ VLSQGFVLDD KGHKMSKSLG
NVISPNDVIK KMGAEIIRLW VAQADTTSDV AVSMGILQQS AESYRKIRNT FRYMLANTSD
FDPKENRVAY DDLRSVDQYM EVKLNDLIKE CLAAYDKFDF TTVFKKVFNF ISNDLSAFYL
DFAKDVLYIE VENSHARRSM QTVIYDAAVK LAKILTPILP HTMEEIWGFL KEDEDYVQLA
NMPEVENYAN HDELLENWAK FMKLRDDVLK ALEDARNKKL IGKSFEAAVT IYPDKETKAM
LDELDADFRE ILIVSKLTIS DDEAPVDAEQ LANAAVVVKH AEGEVCPRCR MIRTDIGADP
KLPMLCGRCA EIVEANYPEV VQEGLEK
