ID I3B1B3_BIFLN Unreviewed; 1103 AA.
AC I3B1B3;
DT 11-JUL-2012, integrated into UniProtKB/TrEMBL.
DT 11-JUL-2012, sequence version 1.
DT 27-MAR-2024, entry version 62.
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:EIJ25156.1};
GN ORFNames=HMPREF1314_0320 {ECO:0000313|EMBL:EIJ25156.1};
OS Bifidobacterium longum subsp. longum 35B.
OC Bacteria; Actinomycetota; Actinomycetes; Bifidobacteriales;
OC Bifidobacteriaceae; Bifidobacterium.
OX NCBI_TaxID=1161904 {ECO:0000313|EMBL:EIJ25156.1, ECO:0000313|Proteomes:UP000004446};
RN [1] {ECO:0000313|EMBL:EIJ25156.1, ECO:0000313|Proteomes:UP000004446}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=35B {ECO:0000313|EMBL:EIJ25156.1};
RX PubMed=23682142;
RA Shkoporov A.N., Efimov B.A., Khokhlova E.V., Chaplin A.V., Kafarskaya L.I.,
RA Durkin A.S., McCorrison J., Torralba M., Gillis M., Sutton G., Weibel D.B.,
RA Nelson K.E., Smeianov V.V.;
RT "Draft Genome Sequences of Two Pairs of Human Intestinal Bifidobacterium
RT longum subsp. longum Strains, 44B and 1-6B and 35B and 2-2B, Consecutively
RT Isolated from Two Children after a 5-Year Time Period.";
RL Genome Announc. 1:E00234-E00213(2013).
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=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;
CC Evidence={ECO:0000256|ARBA:ARBA00000114, ECO:0000256|HAMAP-
CC Rule:MF_02003};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_02003};
CC -!- SUBUNIT: Monomer. {ECO:0000256|HAMAP-Rule:MF_02003}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {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:EIJ25156.1}.
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DR EMBL; AJTI01000062; EIJ25156.1; -; Genomic_DNA.
DR RefSeq; WP_007057186.1; NZ_AJTI01000062.1.
DR AlphaFoldDB; I3B1B3; -.
DR PATRIC; fig|1161904.3.peg.919; -.
DR Proteomes; UP000004446; Unassembled WGS sequence.
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; cd07961; Anticodon_Ia_Ile_ABEc; 1.
DR CDD; cd00818; IleRS_core; 1.
DR Gene3D; 3.40.50.620; HUPs; 2.
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; IPR001412; aa-tRNA-synth_I_CS.
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.
DR PROSITE; PS00178; AA_TRNA_LIGASE_I; 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|HAMAP-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}; Zinc {ECO:0000256|HAMAP-Rule:MF_02003}.
FT DOMAIN 31..683
FT /note="Aminoacyl-tRNA synthetase class Ia"
FT /evidence="ECO:0000259|Pfam:PF00133"
FT DOMAIN 742..894
FT /note="Methionyl/Valyl/Leucyl/Isoleucyl-tRNA synthetase
FT anticodon-binding"
FT /evidence="ECO:0000259|Pfam:PF08264"
FT REGION 1..25
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT MOTIF 65..75
FT /note="'HIGH' region"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
FT MOTIF 649..653
FT /note="'KMSKS' region"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
FT BINDING 652
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02003"
SQ SEQUENCE 1103 AA; 124169 MW; 00B81E2FDCE863DF CRC64;
MSENVYPKAN EGGETAHVAP NPSFPDMEET VLDYWDKDDT FQKSVERNPS GDHSQNEFVF
FDGPPFANGL PHYGHLLTGY AKDVIPRYQT MKGRKVNRVF GWDTHGLPAE LEAQKELGID
SVDQIEKMGI DKFNDACRAS VLKYTNEWQN YVHRQARWVD FEHGYKTLNI PYMESVMWAF
KQLYDKGLAY QGYRVLPYCP KDRTPLSAHE LRMDADVYQD RQDTTVSVAV KMRDEDDAYA
VFWTTTPWTV PTNFAIVVGG DIDYVEVRPT EGKFAGKKFY LGKDLLPHYE KELGENYEVV
RELKGSELEG RRYYPVFPYF AGDEAESEGH VPGPNGYTIF TADYVDTVEG TGLVHQAPYG
EDDMNTLNAH GIKSTDVLDD GCRFTAQCPD YEGDFVFDAN LPILRNLRAG DGPLAEIPEE
RRAILFQEKS YVHSYPHCWR CATPLIYKPV SSWFVSVTKI KPRLLELNQQ INWIPGNVKD
GQFGKWLANA RDWSISRNRF WGSPIPVWVS DDPKYPRVDV YGSLEELKAD FGDYPRDKDG
NINMHRPWID NLVRVNPDDP TGKSHMHRIS DVLDCWFESG SMSFAQFHYP FENKEKFEQH
FPADYIVEYI GQTRGWFYLL HVMATALFDR PAFKNVICHG IVLGSDGQKM SKHLRNYPDV
NGVFDKYGSD AMRWFLMSSP ILRGGNLIVT ADGIRDTVRQ VMLPVWSSYY FFTLYANAAN
GGAGFDARQL RADEVAGLPE MDRYLLARTR RLVLAAEKSL NEFAISDACD AVSDFIDVLT
NWYIRNTRDR FWNEDASAFN TLYTVLEAFM RVLAPLAPME AESVWRGLTG GESVHLADWP
FVADEKTGED TELGRVLVDD PALVDAMEKV REVVSGTLSL RKAAKIRVRQ PLSKLTVVVE
NVDAVKAYDE LLKSELNIKN IEFSTLQDAS AHGLKIVHEL RVNARAAGPR LGKQVQFAIK
ASKSGDWHVD AASGAPVVST PSGDLALVEG EYELINRVEE ENATVAAASV SAALPTGGFV
ILDTALDDDL LAEGYARDVI RSVQDARKAA DLDIADRIAL VLTVPAANVA KVEQFKDLIA
RETLATSFEV KEGAELAVEV AKA
//
