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Protein

Isoleucine--tRNA ligase

Gene

ileS

Organism
Pseudomonas fluorescens (strain Pf0-1)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the attachment of isoleucine to tRNA(Ile). As IleRS can inadvertently accommodate and process structurally similar amino acids such as valine, to avoid such errors it has two additional distinct tRNA(Ile)-dependent editing activities. One activity is designated as 'pretransfer' editing and involves the hydrolysis of activated Val-AMP. The other activity is designated 'posttransfer' editing and involves deacylation of mischarged Val-tRNA(Ile).UniRule annotation

Catalytic activityi

ATP + L-isoleucine + tRNA(Ile) = AMP + diphosphate + L-isoleucyl-tRNA(Ile).UniRule annotation

Cofactori

Zn2+UniRule annotationNote: Binds 1 zinc ion per subunit.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei567 – 5671Aminoacyl-adenylateUniRule annotation
Binding sitei611 – 6111ATPUniRule annotation
Metal bindingi906 – 9061ZincUniRule annotation
Metal bindingi909 – 9091ZincUniRule annotation
Metal bindingi926 – 9261ZincUniRule annotation
Metal bindingi929 – 9291ZincUniRule annotation

GO - Molecular functioni

  1. aminoacyl-tRNA editing activity Source: InterPro
  2. ATP binding Source: UniProtKB-HAMAP
  3. isoleucine-tRNA ligase activity Source: UniProtKB-HAMAP
  4. zinc ion binding Source: UniProtKB-HAMAP

GO - Biological processi

  1. isoleucyl-tRNA aminoacylation Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Molecular functioni

Aminoacyl-tRNA synthetase, Ligase

Keywords - Biological processi

Protein biosynthesis

Keywords - Ligandi

ATP-binding, Metal-binding, Nucleotide-binding, Zinc

Enzyme and pathway databases

BioCyciPFLU205922:GJBD-4931-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Isoleucine--tRNA ligaseUniRule annotation (EC:6.1.1.5UniRule annotation)
Alternative name(s):
Isoleucyl-tRNA synthetaseUniRule annotation
Short name:
IleRSUniRule annotation
Gene namesi
Name:ileSUniRule annotation
Ordered Locus Names:Pfl01_4852
OrganismiPseudomonas fluorescens (strain Pf0-1)
Taxonomic identifieri205922 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaPseudomonadalesPseudomonadaceaePseudomonas
ProteomesiUP000002704: Chromosome

Subcellular locationi

Cytoplasm UniRule annotation

GO - Cellular componenti

  1. cytoplasm Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 943943Isoleucine--tRNA ligasePRO_1000022108Add
BLAST

Proteomic databases

PRIDEiQ3K6L5.

Interactioni

Subunit structurei

Monomer.UniRule annotation

Protein-protein interaction databases

STRINGi205922.Pfl01_4852.

Structurei

3D structure databases

ProteinModelPortaliQ3K6L5.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Motifi58 – 6811"HIGH" regionAdd
BLAST
Motifi608 – 6125"KMSKS" region

Domaini

IleRS has two distinct active sites: one for aminoacylation and one for editing. The misactivated valine is translocated from the active site to the editing site, which sterically excludes the correctly activated isoleucine. The single editing site contains two valyl binding pockets, one specific for each substrate (Val-AMP or Val-tRNA(Ile)).UniRule annotation

Sequence similaritiesi

Belongs to the class-I aminoacyl-tRNA synthetase family. IleS type 1 subfamily.UniRule annotation

Phylogenomic databases

eggNOGiCOG0060.
HOGENOMiHOG000246402.
KOiK01870.
OMAiVLGDWDN.
OrthoDBiEOG644ZM1.

Family and domain databases

Gene3Di1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPiMF_02002. Ile_tRNA_synth_type1.
InterProiIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR002301. Ile-tRNA-ligase.
IPR023585. Ile-tRNA-ligase_type1.
IPR013155. M/V/L/I-tRNA-synth_anticd-bd.
IPR014729. Rossmann-like_a/b/a_fold.
IPR009080. tRNAsynth_1a_anticodon-bd.
IPR009008. Val/Leu/Ile-tRNA-synth_edit.
IPR010663. Znf_DNA_glyclase/IsotRNA_synth.
[Graphical view]
PANTHERiPTHR11946:SF9. PTHR11946:SF9. 1 hit.
PfamiPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 1 hit.
PF06827. zf-FPG_IleRS. 1 hit.
[Graphical view]
PRINTSiPR00984. TRNASYNTHILE.
SUPFAMiSSF47323. SSF47323. 1 hit.
SSF50677. SSF50677. 1 hit.
TIGRFAMsiTIGR00392. ileS. 1 hit.
PROSITEiPS00178. AA_TRNA_LIGASE_I. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q3K6L5-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTDYKATLNL PDTAFPMKAG LPQREPQILQ RWDSIGLYGK LREIGKDRPK
60 70 80 90 100
FVLHDGPPYA NGTIHIGHAL NKILKDMIIR SKTLSGFDAP YVPGWDCHGL
110 120 130 140 150
PIEHKVEVTH GKNLGADKTR ELCRAYATEQ IEGQKTEFIR LGVLGDFANP
160 170 180 190 200
YKTMNFKNEA GEIRALAEIV KGGFVFKGLK PVNWCFDCGS ALAEAEVEYE
210 220 230 240 250
NKKSSTIDVA FPIADEAKLA AAFGLPSLAK PAAIVIWTTT PWTIPANQAL
260 270 280 290 300
NVHPEFTYAL VDIGDKLLVL AEELVESCLT RYGVEGTVLA TAPGSALELI
310 320 330 340 350
NFRHPFYDRL SPVYLADYVE LGAGTGVVHS APAYGVDDFV TCKKYGMVND
360 370 380 390 400
DILNPVQSNG VYVPSLEFFG GQFIWKANPA IVDKLTEVGA LLHTTVIEHS
410 420 430 440 450
YMHCWRHKTP LIYRATAQWF IGMDKEPVSG DTLRVRSLKA IEDTKFVPAW
460 470 480 490 500
GQARLHSMIA NRPDWCISRQ RNWGVPIPFF LNKESGELHP RTVELMEEVA
510 520 530 540 550
KRVEVEGIEA WFKLDAAELL GDEAPQYDKI SDTLDVWFDS GTTHWHVLRG
560 570 580 590 600
SHPMGHETGP RADLYLEGSD QHRGWFHSSL LTGCAIDNHA PYRELLTHGF
610 620 630 640 650
TVDESGRKMS KSLGNVIAPQ KVNDTLGADI MRLWVASTDY SGEMAVSEQI
660 670 680 690 700
LQRSADAYRR IRNTARFLLS NLTGFNPATD LLPAEDMLAL DRWAVDRTLL
710 720 730 740 750
LQRELQEHYG EYRFWNVYSK IHNFCVQELG GFYLDIIKDR QYTTGADSKA
760 770 780 790 800
RRSCQTALFH ISEALVRWIA PILAFTADEL WQYLPGERNE SVMLNTWYEG
810 820 830 840 850
LTELPEGFEL GREYWDRIME VKVAVNKEME IQRAAKAVGG NLQAEVTLFA
860 870 880 890 900
EDALTADLAK LSNELRFVLI TSTATVAPFV QAPADAVATE VSGLKLKIVK
910 920 930 940
SAFPKCARCW HCREDVGVNP EHPEICGRCV DNIDGAGEVR HYA
Length:943
Mass (Da):105,507
Last modified:November 8, 2005 - v1
Checksum:i6B46ACE3C698942C
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000094 Genomic DNA. Translation: ABA76589.1.
RefSeqiWP_011336005.1. NC_007492.2.
YP_350580.1. NC_007492.2.

Genome annotation databases

EnsemblBacteriaiABA76589; ABA76589; Pfl01_4852.
GeneIDi3716852.
KEGGipfo:Pfl01_4852.
PATRICi19891898. VBIPseFlu44242_4864.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000094 Genomic DNA. Translation: ABA76589.1.
RefSeqiWP_011336005.1. NC_007492.2.
YP_350580.1. NC_007492.2.

3D structure databases

ProteinModelPortaliQ3K6L5.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi205922.Pfl01_4852.

Proteomic databases

PRIDEiQ3K6L5.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABA76589; ABA76589; Pfl01_4852.
GeneIDi3716852.
KEGGipfo:Pfl01_4852.
PATRICi19891898. VBIPseFlu44242_4864.

Phylogenomic databases

eggNOGiCOG0060.
HOGENOMiHOG000246402.
KOiK01870.
OMAiVLGDWDN.
OrthoDBiEOG644ZM1.

Enzyme and pathway databases

BioCyciPFLU205922:GJBD-4931-MONOMER.

Family and domain databases

Gene3Di1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPiMF_02002. Ile_tRNA_synth_type1.
InterProiIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR002301. Ile-tRNA-ligase.
IPR023585. Ile-tRNA-ligase_type1.
IPR013155. M/V/L/I-tRNA-synth_anticd-bd.
IPR014729. Rossmann-like_a/b/a_fold.
IPR009080. tRNAsynth_1a_anticodon-bd.
IPR009008. Val/Leu/Ile-tRNA-synth_edit.
IPR010663. Znf_DNA_glyclase/IsotRNA_synth.
[Graphical view]
PANTHERiPTHR11946:SF9. PTHR11946:SF9. 1 hit.
PfamiPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 1 hit.
PF06827. zf-FPG_IleRS. 1 hit.
[Graphical view]
PRINTSiPR00984. TRNASYNTHILE.
SUPFAMiSSF47323. SSF47323. 1 hit.
SSF50677. SSF50677. 1 hit.
TIGRFAMsiTIGR00392. ileS. 1 hit.
PROSITEiPS00178. AA_TRNA_LIGASE_I. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: Pf0-1.

Entry informationi

Entry nameiSYI_PSEPF
AccessioniPrimary (citable) accession number: Q3K6L5
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: November 8, 2005
Last modified: March 4, 2015
This is version 78 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. Aminoacyl-tRNA synthetases
    List of aminoacyl-tRNA synthetase entries
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.