SYI_FRATM
ID SYI_FRATM Reviewed; 935 AA.
AC B2SF88;
DT 28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT 01-JUL-2008, sequence version 1.
DT 03-AUG-2022, entry version 86.
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=FTM_0503;
OS Francisella tularensis subsp. mediasiatica (strain FSC147).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Thiotrichales;
OC Francisellaceae; Francisella.
OX NCBI_TaxID=441952;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=FSC147;
RX PubMed=19521508; DOI=10.1371/journal.ppat.1000472;
RA Larsson P., Elfsmark D., Svensson K., Wikstroem P., Forsman M., Brettin T.,
RA Keim P., Johansson A.;
RT "Molecular evolutionary consequences of niche restriction in Francisella
RT tularensis, a facultative intracellular pathogen.";
RL PLoS Pathog. 5:E1000472-E1000472(2009).
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; CP000915; ACD30520.1; -; Genomic_DNA.
DR RefSeq; WP_012429277.1; NC_010677.1.
DR AlphaFoldDB; B2SF88; -.
DR SMR; B2SF88; -.
DR KEGG; ftm:FTM_0503; -.
DR HOGENOM; CLU_001493_7_1_6; -.
DR OMA; HLGTAWN; -.
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; Zinc.
FT CHAIN 1..935
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_1000189167"
FT MOTIF 58..68
FT /note="'HIGH' region"
FT MOTIF 599..603
FT /note="'KMSKS' region"
FT BINDING 558
FT /ligand="L-isoleucyl-5'-AMP"
FT /ligand_id="ChEBI:CHEBI:178002"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 602
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 897
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 900
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 917
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 920
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ SEQUENCE 935 AA; 106981 MW; C9CBE2D9F3CF49B6 CRC64;
MSDYKDTLNL PKTSFSMKGN LANKEPMILN KWEKQGIYKK IREHFAGREK FILHDGPPYA
NGSIHVGHAV NKILKDIIIK SKTLSGYDAP FTPTWDCHGL PIELQVEKKH GKAGQSISED
DFRKECRKYA KKQVEIQKKD FKRLGVLGDW EQPYLTINFD YEANMIRTLA KIIENGHLSK
GFKPVHWCTD CGSALAEAEV EYADKVSPAI DVKFKIKDKD KLAQAFGLDS LNHDAFAIIW
TTTPWTLPAN QAIAVNNQLN YSLIKIEDFY IILAENLVEQ TLKRYAIENA QIIATTTGNK
LTGIIAEHPF YSRHVPILHG DHVTDDSGTG LVHTAPTHGV DDFTLGKEHN LSMEIFVKGN
GCYSENTKLF AGEFIFKAND RIIELLGEKK RLMNSDKIKH SYPHCWRHKT PLMFRATPQW
FISMEKQGLR DKALQAIKET SWAPSWGQAR IEGMVKDRPD WCISRQRTWG VPLSLFIHKE
TEELHPNTIE ILYKVAEKIE KDGIEAWFNA DDCEFITETA QYKSVKDTLD VWFDSGSSSM
CILDLDKRLS YPADLYLEGS DQHRGWFQTS LLVAMSAKGS QPYKEVFTHG FVVDEHGRKM
SKSLGNVTSP QDIYNTLGAD ILRLWTASTD YKSEMAVSDQ ILKRTADTYR RLRNTARFLL
SNLDGFNPVT DIIEFDKLVK LDQWAIAKTK EFQDKIIEAY DKYQTHTVAQ LIHHFCSIEM
GSFYLDIIKD RQYTAKTDGH PRKSAQTAIY HIVHALVRWM APILSFTADE IWDATLKTTD
LPIQLCEWYT GLKSFDQDAE LDLEYWAKIQ EIRSEVNRVL EIKRNEDVIK ASLEAEITIY
ADKYNYKLLE KLGNELRFLL ISSKADLKVI EESTSSSIAA NIPGLLIEIT KIEEPKCERC
WHRSSTVGDN PQYKDICSRC VENITTEAGE SREFA
