SYI_MYCMS
ID SYI_MYCMS Reviewed; 915 AA.
AC Q6MT28;
DT 20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 108.
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=MSC_0585;
OS Mycoplasma mycoides subsp. mycoides SC (strain PG1).
OC Bacteria; Tenericutes; Mollicutes; Mycoplasmataceae; Mycoplasma.
OX NCBI_TaxID=272632;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PG1;
RX PubMed=14762060; DOI=10.1101/gr.1673304;
RA Westberg J., Persson A., Holmberg A., Goesmann A., Lundeberg J.,
RA Johansson K.-E., Pettersson B., Uhlen M.;
RT "The genome sequence of Mycoplasma mycoides subsp. mycoides SC type strain
RT PG1T, the causative agent of contagious bovine pleuropneumonia (CBPP).";
RL Genome Res. 14:221-227(2004).
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; BX293980; CAE77208.1; -; Genomic_DNA.
DR RefSeq; NP_975566.1; NC_005364.2.
DR AlphaFoldDB; Q6MT28; -.
DR SMR; Q6MT28; -.
DR STRING; 272632.MSC_0585; -.
DR EnsemblBacteria; CAE77208; CAE77208; MSC_0585.
DR KEGG; mmy:MSC_0585; -.
DR PATRIC; fig|272632.4.peg.630; -.
DR eggNOG; COG0060; Bacteria.
DR HOGENOM; CLU_001493_7_1_14; -.
DR OMA; HLGTAWN; -.
DR Proteomes; UP000001016; 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 Pfam; PF08264; Anticodon_1; 1.
DR Pfam; PF00133; tRNA-synt_1; 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..915
FT /note="Isoleucine--tRNA ligase"
FT /id="PRO_0000098422"
FT MOTIF 59..69
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 883
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
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 899
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
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"
SQ SEQUENCE 915 AA; 106344 MW; 55288E92EC9CE1BB CRC64;
MSNKYKDTLL IGKTDFDMRA NLNQKEPKFE QFWQENQIYN KKLKLNENKK VFVLHDGPPY
ANGDLHIGHA LNKTLKDFII RFKNTTGYYA PFIMGWDTHG LPIESAVTKM GVDRKSMSSV
AFRELCYKYA LEQVSNQANQ FNRLGMFTDY DTKYVTLTHD FEMSELRLFE KMYQKGLIYK
DLKPIYWSPS SESALADSEI IYKDISSPSI YVGCDVINSD EFKNTQLIIW TTTPWTLPSN
QLIAIGSKIK YSLIQVENSD KQFILASDLI NQVSQNIGWE NVKVIKEIDA NKLVGLNYVH
PLYDTKISKV VLGHHVTSES GSGLVHIASG FGEDDFLIAK QNNIKPFAPI DNQGKFTTQI
SDLDPQLVGM FYDDTNKIIT KRLEENKKLL KLKFLTHSYP HDWRTKKPVI YRCTLQWFVN
LAPVKNDILK NVDQINTHPK WAKKRLYQVL DERTDWTISR QRLWGVPIIA FYDQNDDLVL
NEQILNYAIN KIEEVGTNAW FSLDADEFLP EQYKNKSLKK EKDILDVWFD SGSSAIALSQ
KYPNLKLPYD MYLEGNDQYR GWFNASMINS TIYSNTSPYK QLVSHGMTTD EKGNKMSKSL
GNGVDPIAFA NDLGADILRL WVASTDFTDD QKIGKEIIKQ ISESYRKIRN TIRFILANLN
DFNVKTDYQT KLSEVDMYSL FNLTSFKNKV IQAYQELNFS LVYTLVMNYV TKNLSAFYLD
FIKDILYINS KNDLRRRQVQ TVLYEQLYCL IDVLRPILVH TIEEVYQNLN DNNKVESVHL
LDNKEQNFVY DKEFINKWDQ VMILRDDVNK ALEISRENKI INKGFEAVVN IKLDKEYDDL
KNIKDLSQIF IVNSINFVDN IDNSFIKTNI SSIKVEQKQG LKCQRCWQIF DNLIDDEICN
HCNNVVKSLL ETKCE
