ID A0A916XY96_9FLAO Unreviewed; 1133 AA.
AC A0A916XY96;
DT 22-FEB-2023, integrated into UniProtKB/TrEMBL.
DT 22-FEB-2023, sequence version 1.
DT 28-JAN-2026, entry version 11.
DE RecName: Full=Isoleucine--tRNA ligase {ECO:0000256|HAMAP-Rule:MF_02003};
DE EC=6.1.1.5 {ECO:0000256|HAMAP-Rule:MF_02003};
DE AltName: Full=Isoleucyl-tRNA synthetase {ECO:0000256|HAMAP-Rule:MF_02003};
DE Short=IleRS {ECO:0000256|HAMAP-Rule:MF_02003};
GN Name=ileS {ECO:0000256|HAMAP-Rule:MF_02003,
GN ECO:0000313|EMBL:GGD21602.1};
GN ORFNames=GCM10011343_10020 {ECO:0000313|EMBL:GGD21602.1};
OS Flavobacterium orientale.
OC Bacteria; Pseudomonadati; Bacteroidota; Flavobacteriia; Flavobacteriales;
OC Flavobacteriaceae; Flavobacterium.
OX NCBI_TaxID=1756020 {ECO:0000313|EMBL:GGD21602.1, ECO:0000313|Proteomes:UP000625735};
RN [1] {ECO:0000313|EMBL:GGD21602.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=CGMCC 1.12506 {ECO:0000313|EMBL:GGD21602.1};
RX PubMed=25193709;
RG US DOE Joint Genome Institute (JGI-PGF);
RA Walter F., Albersmeier A., Kalinowski J., Ruckert C.;
RT "Complete genome sequence of Corynebacterium casei LMG S-19264T (=DSM
RT 44701T), isolated from a smear-ripened cheese.";
RL Int. J. Syst. Evol. Microbiol. 189:76-77(2014).
RN [2] {ECO:0000313|EMBL:GGD21602.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=CGMCC 1.12506 {ECO:0000313|EMBL:GGD21602.1};
RA Sun Q., Zhou Y.;
RL Submitted (SEP-2020) to the EMBL/GenBank/DDBJ databases.
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:0000256|ARBA:ARBA00025217, ECO:0000256|HAMAP-Rule:MF_02003}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=tRNA(Ile) + L-isoleucine + ATP = L-isoleucyl-tRNA(Ile) + AMP +
CC diphosphate; Xref=Rhea:RHEA:11060, Rhea:RHEA-COMP:9666, Rhea:RHEA-
CC COMP:9695, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:58045,
CC ChEBI:CHEBI:78442, ChEBI:CHEBI:78528, ChEBI:CHEBI:456215; EC=6.1.1.5;
CC Evidence={ECO:0000256|ARBA:ARBA00048359, ECO:0000256|HAMAP-
CC Rule:MF_02003};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947,
CC ECO:0000256|HAMAP-Rule:MF_02003};
CC -!- SUBUNIT: Monomer. {ECO:0000256|ARBA:ARBA00011245, ECO:0000256|HAMAP-
CC Rule:MF_02003}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|ARBA:ARBA00004496,
CC ECO:0000256|HAMAP-Rule:MF_02003}.
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:0000256|HAMAP-Rule:MF_02003}.
CC -!- SIMILARITY: Belongs to the class-I aminoacyl-tRNA synthetase family.
CC IleS type 2 subfamily. {ECO:0000256|ARBA:ARBA00007078,
CC ECO:0000256|HAMAP-Rule:MF_02003}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:GGD21602.1}.
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DR EMBL; BMFG01000003; GGD21602.1; -; Genomic_DNA.
DR RefSeq; WP_188361442.1; NZ_BMFG01000003.1.
DR AlphaFoldDB; A0A916XY96; -.
DR Proteomes; UP000625735; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0002161; F:aminoacyl-tRNA deacylase 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; cd07961; Anticodon_Ia_Ile_ABEc; 1.
DR CDD; cd00818; IleRS_core; 1.
DR FunFam; 3.40.50.620:FF:000063; Isoleucine--tRNA ligase; 1.
DR Gene3D; 3.30.720.200; -; 1.
DR Gene3D; 3.40.50.620; HUPs; 2.
DR Gene3D; 1.10.730.10; Isoleucyl-tRNA Synthetase, Domain 1; 1.
DR Gene3D; 3.90.740.10; Valyl/Leucyl/Isoleucyl-tRNA synthetase, editing domain; 1.
DR HAMAP; MF_02003; Ile_tRNA_synth_type2; 1.
DR InterPro; IPR002300; aa-tRNA-synth_Ia.
DR InterPro; IPR033709; Anticodon_Ile_ABEc.
DR InterPro; IPR002301; Ile-tRNA-ligase.
DR InterPro; IPR023586; Ile-tRNA-ligase_type2.
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; PTHR42780:SF1; ISOLEUCINE--TRNA LIGASE, CYTOPLASMIC; 1.
DR PANTHER; PTHR42780; SOLEUCYL-TRNA SYNTHETASE; 1.
DR Pfam; PF08264; Anticodon_1; 1.
DR Pfam; PF19302; DUF5915; 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; 2.
DR SUPFAM; SSF52374; Nucleotidylyl transferase; 1.
DR SUPFAM; SSF50677; ValRS/IleRS/LeuRS editing domain; 1.
PE 3: Inferred from homology;
KW Aminoacyl-tRNA synthetase {ECO:0000256|ARBA:ARBA00023146,
KW ECO:0000256|HAMAP-Rule:MF_02003};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_02003};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_02003};
KW Ligase {ECO:0000256|ARBA:ARBA00022598, ECO:0000256|HAMAP-Rule:MF_02003};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_02003};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_02003};
KW Protein biosynthesis {ECO:0000256|ARBA:ARBA00022917, ECO:0000256|HAMAP-
KW Rule:MF_02003}; Reference proteome {ECO:0000313|Proteomes:UP000625735};
KW Zinc {ECO:0000256|ARBA:ARBA00022833, ECO:0000256|HAMAP-Rule:MF_02003}.
FT DOMAIN 20..720
FT /note="Aminoacyl-tRNA synthetase class Ia"
FT /evidence="ECO:0000259|Pfam:PF00133"
FT DOMAIN 769..921
FT /note="Methionyl/Valyl/Leucyl/Isoleucyl-tRNA synthetase
FT anticodon-binding"
FT /evidence="ECO:0000259|Pfam:PF08264"
FT MOTIF 50..60
FT /note="'HIGH' region"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
FT MOTIF 682..686
FT /note="'KMSKS' region"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
FT BINDING 685
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
SQ SEQUENCE 1133 AA; 129445 MW; 4D02A8D6503D31E5 CRC64;
MSTKFTEYKS LDLPTVASEI LDFWKKEGVF TKSVTTRENQ PPYVFFEGPP SANGLPGIHH
VMARTIKDIF CRYKTQKGFQ VKRKAGWDTH GLPVELGTEK ELGITKEDIG VKISVEEYNE
ACKRTVMRYT DVWNDLTEKM GYWVDMEDPY VTYKSKYMES VWWLLKQIYD KNLLYKGYTI
QPYSPKAGTG LSSHEVNQPG SYRDVTDTTV VAQFKTKPET LPNFLQGFGD VHILAWTTTP
WTLPSNTALT VGSKIDYVLI KTFNQYTFEP IQVVLAKNLV GKQFAGKYFI TENETDFTNY
KADDKKIPYQ IITECKGADL VGIRYEQLLP LALPYQNPEN AFRVITGDFV TTEDGTGVVH
TAPTFGADDA KVAKEAIPEV PPMLVLDENG TPVPLVDLQG RFINGLGEMS GKYVKNEYYN
DGEAPERSVD VDIAIRLKEE NKAFKVEKYV HSYPHCWRTD KPILYYPLDS WFIKVTDVKE
RMFDLNDTIN WKPKATGEGR FGNWLKNAND WNLSRSRYWG IPLPIWRTED KTEEICIGSV
EELYGEIEKS IAAGIQKEHP FKAFEVGNME ETNYDLVDLH KNVVDAIVLV SPSGQPMKRE
TDLIDVWFDS GAMPYAQWHY PFENKNLIDN NEAFPADFIA EGVDQTRGWF YTLHAIGTLV
FDKIAYKNVV SNGLVLDKNG QKMSKRLGNA IDPFKTLEEY GPDATRWYMI ANANPWDNLK
FDIEGVAEVR RKFFGTLYNT YSFFALYANI DEFNYSEADI PLEERPEIDR WILSELHTLI
KNVESYYEDY EPTKAARDIS EFVQENLSNW YVRLCRRRFW KGDYGTDKIA AYQTLYTCLV
TVSKLAAPIA PFFMDRLYKD LTQATLSENF DSIHLSDFPK YVEKYVDKSL ESKMMKAQTV
SSLVLSLRKK EMIKVRQPLQ KVMIPILDAK QRVEIEAVSD LIKAEVNVKE IELLDDASGV
LVKQIKPNFK ALGPRFGKDM GLVSKAIQEF NQEQINELDR NGSLDIEITG KSITLALDDV
EISSQDIPGL LVANANGITV ALDITITDEL RKEGIARELV NRIQNLRKDS GFEVTDKIKV
QLQNNETLEA AIEANIEYIK SETLTSDLVF ESEIKNGTEI EFDAIITKIL ISK
//
