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SYI_STRGC
ID   SYI_STRGC               Reviewed;         930 AA.
AC   A8AW24;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   23-OCT-2007, sequence version 1.
DT   03-AUG-2022, entry version 97.
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=SGO_0681;
OS   Streptococcus gordonii (strain Challis / ATCC 35105 / BCRC 15272 / CH1 /
OS   DL1 / V288).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=467705;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Challis / ATCC 35105 / BCRC 15272 / CH1 / DL1 / V288;
RX   PubMed=17720781; DOI=10.1128/jb.01023-07;
RA   Vickerman M.M., Iobst S., Jesionowski A.M., Gill S.R.;
RT   "Genome-wide transcriptional changes in Streptococcus gordonii in response
RT   to competence signaling peptide.";
RL   J. Bacteriol. 189:7799-7807(2007).
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; CP000725; ABV09656.1; -; Genomic_DNA.
DR   RefSeq; WP_012000155.1; NC_009785.1.
DR   AlphaFoldDB; A8AW24; -.
DR   SMR; A8AW24; -.
DR   STRING; 467705.SGO_0681; -.
DR   EnsemblBacteria; ABV09656; ABV09656; SGO_0681.
DR   KEGG; sgo:SGO_0681; -.
DR   eggNOG; COG0060; Bacteria.
DR   HOGENOM; CLU_001493_7_1_9; -.
DR   OMA; HLGTAWN; -.
DR   Proteomes; UP000001131; 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..930
FT                   /note="Isoleucine--tRNA ligase"
FT                   /id="PRO_1000088560"
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"
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   930 AA;  105189 MW;  0B7AED6F835C95F2 CRC64;
     MKLKETLNLG KTDFPMRAGL PTKEPVWQKE WEEAKLYQRR QELNQGKPHF TLHDGPPYAN
     GNIHVGHAMN KISKDIIVRS KSMSGFYAPY IPGWDTHGLP IEQVLAKQGV KRKEMDLVEY
     LKLCREYALS QVDKQREDFK RLGVSGDWEN PYVTLTPDYE AAQIRVFGEM AKKGYIYRGA
     KPVYWSWSSE SALAEAEIEY HDLLSTSLYY ANRVKDGKGV LDTDTYIVVW TTTPFTITAS
     RGLTVGADID YVLVQPAGES RKFVVASELL NSLSEKFGWA DVQVLATYRG QELNHIVTVH
     PWDTAVDELV ILGDHVTTDS GTGIVHTAPG FGEDDYNVGV ANGLEVAVTV NERGIMMENA
     GPEFAGQFYD KVVPTVIEKL GDLLLAQEEI SHSYPFDWRT KKPIIWRAVP QWFASVSKFR
     QEILDEIEKV KFHSEWGKVR LYNMIRDRGD WVISRQRAWG VPLPIFYAED GTPIMTVETI
     EHVAQLFEEH GSIIWWERDA KDLLPEGFTH PGSPNGEFKK ETDIMDVWFD SGSSWNGVVV
     NRPELKYPAD LYLEGSDQYR GWFNSSLITS VANHGVAPYK QILSQGFALD GKGEKMSKSL
     GNTIAPSDVE KQFGAEILRL WVTSVDSSND VRISMDILSQ VSETYRKIRN TLRFLIANTS
     DFNPAEDTVA YEELRSVDKY MTVRFNQLVK TIRDAYADFE FLTIYKALVN FINVDLSAFY
     LDFAKDVVYI EGAKSLERRQ MQTVFYDILV KITKLLTPIL PHTAEEIWSY LEFEAEDFVQ
     LSELPEAETF ANQEEILNTW AAFMDFRGQA QKALEEARNA KVIGKSLEAH LTIYPNEVVK
     TLLGAVDSNV AQLLIVSELT IAEGGAPEGA VSFEDVAFTV ERAAGEVCDR CRRIDPTTAE
     RNYHAVICDH CASIVEENFA DAVAEGFETK
 
 
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