ID SYI_AROAE Reviewed; 939 AA.
AC Q5P221;
DT 20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT 04-JAN-2005, sequence version 1.
DT 27-MAR-2024, entry version 119.
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=AZOSEA25180;
GN ORFNames=ebA4448;
OS Aromatoleum aromaticum (strain EbN1) (Azoarcus sp. (strain EbN1)).
OC Bacteria; Pseudomonadota; Betaproteobacteria; Rhodocyclales;
OC Rhodocyclaceae; Aromatoleum.
OX NCBI_TaxID=76114;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=EbN1;
RX PubMed=15551059; DOI=10.1007/s00203-004-0742-9;
RA Rabus R., Kube M., Heider J., Beck A., Heitmann K., Widdel F.,
RA Reinhardt R.;
RT "The genome sequence of an anaerobic aromatic-degrading denitrifying
RT bacterium, strain EbN1.";
RL Arch. Microbiol. 183:27-36(2005).
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; CR555306; CAI08643.1; -; Genomic_DNA.
DR RefSeq; WP_011238327.1; NC_006513.1.
DR AlphaFoldDB; Q5P221; -.
DR SMR; Q5P221; -.
DR STRING; 76114.ebA4448; -.
DR KEGG; eba:ebA4448; -.
DR eggNOG; COG0060; Bacteria.
DR HOGENOM; CLU_001493_7_1_4; -.
DR OrthoDB; 9810365at2; -.
DR Proteomes; UP000006552; 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 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 Gene3D; 3.90.740.10; Valyl/Leucyl/Isoleucyl-tRNA synthetase, editing domain; 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 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 Pfam; PF06827; zf-FPG_IleRS; 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; Metal-binding;
KW Nucleotide-binding; Protein biosynthesis; Reference proteome; Zinc.
FT CHAIN 1..939
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_0000098343"
FT MOTIF 58..68
FT /note="'HIGH' region"
FT MOTIF 615..619
FT /note="'KMSKS' region"
FT BINDING 574
FT /ligand="L-isoleucyl-5'-AMP"
FT /ligand_id="ChEBI:CHEBI:178002"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 618
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 902
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 905
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 922
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
FT BINDING 925
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02002"
SQ SEQUENCE 939 AA; 105391 MW; 42837213399F6856 CRC64;
MADYRKTLNM PDTPFPMRGD LAKREPGWVA DWQAKKLYQK VRKAAAGRPK FVLHDGPPYA
NGDIHIGHAV NKILKDIIVR SKTLAGFDAP YVPGWDCHGL PIEHQIEKQH GKHLPADRAR
ELCREYAAEQ IERQKKDFIR LGVLGDWDNP YRTMNFSNEA DEIRALGELF RKGFLFKGLK
PVNWCFDCGS ALAEAEVEYQ DKKSPAIDVG FPLVDNERDK LAHAFGLDTL PEQPVYIVIW
TTTPWTIPSN QALNVHPELI YELVETPKGL LILAAELRAS ALERYQLEGR VLAAARGVAL
DRINFRHPFY DRLSPVFLGD YVAADAGTGI VHSAPAYGLD DFVSCTRYGM RNDEILNPVQ
ADGTFAGSLP FFGGLSVWDA NPKIVDKLAE VGSLFASGTL THSYMHCWRH KTPVIYRATT
QWFVGMDRLP GREAVEPGSA TLRELALKAV DETQFYPAWG KARLHSMIAN RPDWCVSRQR
NWGVPIPLFL HKETGEPHPR SLELLEQVAQ RVEQHGIDAW FKLDAAELLG SDVAQYDKMR
DTLDVWFDSG TTHWTVLRGS HAADSQWPAA LYLEGSDQHR GWFHSSLLTG CAIDGRAPYD
ALLTHGFVVD GQGKKMSKSK GNVVAPQEVS DKLGAEILRL WVAATDYSGE LTISKEILDR
VVEVYRRLRN TLRFLLANTG DFDIARDGVP VEEWLDIDHY ALALTRRLQE QVTGDYARFE
FHKIVQALQN FAAEDLGAFY VDILKDRLYT TKADSRARRA AQTALWHITQ AITRMMAPIL
TFTAEEIWRV TGNDAEDSVM LHTWHELPEL GASDEILARW ELIRSARAEV QKVLESLRSD
GRIGASLQAE VRVRASGARF DALASVGADL HFVLITSRAE LVRVETEADE GVDAAPSSHQ
KCGRCWHFRE DIGVDADHPE LCGRCCTNLH GDGESRTHA
//
