ID SYI_STRP3 Reviewed; 933 AA.
AC P0DG42; Q79XQ2; Q8K6S2;
DT 27-JUL-2011, integrated into UniProtKB/Swiss-Prot.
DT 27-JUL-2011, sequence version 1.
DT 27-MAR-2024, entry version 63.
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=SpyM3_1166;
OS Streptococcus pyogenes serotype M3 (strain ATCC BAA-595 / MGAS315).
OC Bacteria; Bacillota; Bacilli; Lactobacillales; Streptococcaceae;
OC Streptococcus.
OX NCBI_TaxID=198466;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-595 / MGAS315;
RX PubMed=12122206; DOI=10.1073/pnas.152298499;
RA Beres S.B., Sylva G.L., Barbian K.D., Lei B., Hoff J.S., Mammarella N.D.,
RA Liu M.-Y., Smoot J.C., Porcella S.F., Parkins L.D., Campbell D.S.,
RA Smith T.M., McCormick J.K., Leung D.Y.M., Schlievert P.M., Musser J.M.;
RT "Genome sequence of a serotype M3 strain of group A Streptococcus: phage-
RT encoded toxins, the high-virulence phenotype, and clone emergence.";
RL Proc. Natl. Acad. Sci. U.S.A. 99:10078-10083(2002).
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 -!- 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}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; AE014074; AAM79773.1; -; Genomic_DNA.
DR RefSeq; WP_011054710.1; NC_004070.1.
DR AlphaFoldDB; P0DG42; -.
DR SMR; P0DG42; -.
DR KEGG; spg:SpyM3_1166; -.
DR HOGENOM; CLU_001493_7_1_9; -.
DR Proteomes; UP000000564; 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: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 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 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;
KW Nucleotide-binding; Protein biosynthesis.
FT CHAIN 1..933
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_0000098484"
FT MOTIF 57..67
FT /note="'HIGH' region"
FT MOTIF 595..599
FT /note="'KMSKS' region"
FT BINDING 554
FT /ligand="L-isoleucyl-5'-AMP"
FT /ligand_id="ChEBI:CHEBI:178002"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 598
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ SEQUENCE 933 AA; 104907 MW; AF7E116AB7FDF9EE CRC64;
MKLKETLNLG KTAFPMRAGL PNKEPQWQAA WEEADLYTKR QELNAGKPAF HLHDGPPYAN
GNIHVGHALN KISKDIIVRS KSMSGFHVPY VPGWDTHGLP IEQVLAKQGV KRKEMDLADY
LDMCRQYALS QVDKQRDDFK RLGVSADWEN PYVTLDPQFE ADQIRVFGAM ADKGYIYRGA
KPVYWSWSSE SALAEAEIEY HDIDSTSLYY ANKVKDGKGI LDTNTYIVVW TTTPFTVTAS
RGLTVGPDMD YLVVKPAGSD RQYVVAEGLL DSLAGKFGWE SFETLASHKG ADLEYIVTEH
PWDTDVEELV ILGDHVTLES GTGIVHTAPG FGEDDYNVGT KYKLEVAVTV DERGLMMENA
GPDFHGQFYD KVTPIVIDKL GDLLLAQEVI NHSYPFDWRT KKPIIWRAVP QWFASVSDFR
QDILDEIEKT TFHPSWGKTR LYNMIRDRGD WVISRQRAWG VPLPIFYAED GTAIMTKEVT
DHVANLFQEN GSIIWWQKEA KDLLPEGFTH PGSPNGEFTK ETDIMDVWFD SGSSWNGVMN
ARDNLSYPAD LYLEGSDQYR GWFNSSLITS VAVNGHAPYK AILSQGFVLD GKGEKMSKSK
GNIISPNDVA KQYGADILRL WVASVDTDND VRVSMEILGQ VSETYRKIRN TLRFLIANTS
DFNPATDTVA YADLGAVDKY MTIVFNQLVA TINDAYERYD FMTIYKAVVN FVTVDLSAFY
LDFAKDVVYI EAANSLERRR MQTVFYDILV KITKLLTPIL PHTTEEIWSY LEHESEAFVQ
LAEMPAAETF SAQEDILEAW SAFMTLRTQA QKALEEARNA KVIGKSLEAH LTIYASEEVK
TLLTALDSDI ALLLIVSQLT IADLADAPAD AVAFEGVAFT VEHAVGEVCE RSRRIDPTTR
MRSYNAFVCD HSAKIIEENF PEAVAEGFEE SGK
//
