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Protein

Isoleucine--tRNA ligase

Gene

ileS

Organism
Helicobacter acinonychis (strain Sheeba)
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)DescriptionActionsGraphical viewLength
Binding sitei569Aminoacyl-adenylateUniRule annotation1
Binding sitei613ATPUniRule annotation1
Metal bindingi895ZincUniRule annotation1
Metal bindingi898ZincUniRule annotation1
Metal bindingi910ZincUniRule annotation1
Metal bindingi913ZincUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Aminoacyl-tRNA synthetase, Ligase

Keywords - Biological processi

Protein biosynthesis

Keywords - Ligandi

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

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:Hac_0108
OrganismiHelicobacter acinonychis (strain Sheeba)
Taxonomic identifieri382638 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaEpsilonproteobacteriaCampylobacteralesHelicobacteraceaeHelicobacter
Proteomesi
  • UP000000775 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10000220771 – 921Isoleucine--tRNA ligaseAdd BLAST921

Interactioni

Subunit structurei

Monomer.UniRule annotation

Protein-protein interaction databases

STRINGi382638.Hac_0108.

Structurei

3D structure databases

ProteinModelPortaliQ17ZG3.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi58 – 68"HIGH" regionAdd BLAST11
Motifi610 – 614"KMSKS" region5

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

eggNOGiENOG4105C07. Bacteria.
COG0060. LUCA.
HOGENOMiHOG000246402.
KOiK01870.
OMAiTHGFIVD.
OrthoDBiPOG091H028I.

Family and domain databases

CDDicd07960. Anticodon_Ia_Ile_BEm. 1 hit.
Gene3Di1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPiMF_02002. Ile_tRNA_synth_type1. 1 hit.
InterProiIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR033708. Anticodon_Ile_BEm.
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_Ia_anticodon-bd.
IPR009008. Val/Leu/Ile-tRNA-synth_edit.
[Graphical view]
PfamiPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 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.

Q17ZG3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKEYKDTLNL NTTTFSMKGN LSVNEPKTYA KWQEQQAFKR MQNRKDHHGD
60 70 80 90 100
FTLHDGPPYA NGHLHLGHAL NKILKDIVVK REYFKGKKVY FTPGWDCHGL
110 120 130 140 150
PIEQQILEQL EKEKTSLENP TLFREKCRDH AKKFLEIQKN EFLQLGVLGD
160 170 180 190 200
FEDPYKTMDF KFEASIYRAL VEVAKKGLLK ERHKPIYWSY ACESALAEAE
210 220 230 240 250
VEYKMKKSPS IFVAFGLKKE SLEKLKIKKA SLVIWTTTPW TLCANVAIAL
260 270 280 290 300
KKDALYALTQ KGYLVAKALH EKLVALGVVD SKITHEFNAN DLEYLVATNP
310 320 330 340 350
LNQRDSLVIL GEHVSLEDGT GAVHTAPGHG EDDYHLGLKY HLEVLMPVDE
360 370 380 390 400
KGCYDESIIH KKLLDESYLG EHIFKAQKRI MEQLGDSLLL EQEIEHSYPH
410 420 430 440 450
CWRTHKPVIY RATTQWFILM DEPFIQNDGS QKTLREVALN AIEKVEFVPS
460 470 480 490 500
SGKNRLKIMI ENRPDWCLSR QRKWGVPLAF FIDKRTNKPC FESEVLEHAA
510 520 530 540 550
NLFEEKGCDV WWEYDIKDLL PPSCQDNAKH YEKVMHILDV WFDSASTFKA
560 570 580 590 600
VLEDYHGEKG KSPSNVVLEG SDQHRGWFQS SLLLGCILNN QAPFKKVITH
610 620 630 640 650
GFIVDEKGEK MSKSKGNVVS LDNLLKKHGS DVVRLWVAFN DYQNDLRVSQ
660 670 680 690 700
TFFTQTEQHY KKFRNTLKFL LANFSDMDLK NLERSHDFSP LDHFLLETLE
710 720 730 740 750
TISNEVNSVF EEHDFVKGLN ILMAFVTNEL SGIYLDACKD SLYCDSISSE
760 770 780 790 800
KRQAIQMVLL VVASKLCYFL APILTHTIEE VLEHSEVLCA FLQAKDVFDL
810 820 830 840 850
KDINVLEKLH LKECKKPENF EALLALRSAF NEELDRLKKE GVVKNSLECT
860 870 880 890 900
IEVEEKALCE NLVEELLMVS SVGSANEKIS ETPTFTLFKA PFFKCPRCWR
910 920
FKSELENTPC KRCKQVLKER Q
Length:921
Mass (Da):106,190
Last modified:July 25, 2006 - v1
Checksum:i7D8E6D990DE08006
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM260522 Genomic DNA. Translation: CAJ98963.1.
RefSeqiWP_011577085.1. NC_008229.1.

Genome annotation databases

EnsemblBacteriaiCAJ98963; CAJ98963; Hac_0108.
KEGGihac:Hac_0108.
PATRICi20584142. VBIHelAci71660_0104.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM260522 Genomic DNA. Translation: CAJ98963.1.
RefSeqiWP_011577085.1. NC_008229.1.

3D structure databases

ProteinModelPortaliQ17ZG3.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi382638.Hac_0108.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAJ98963; CAJ98963; Hac_0108.
KEGGihac:Hac_0108.
PATRICi20584142. VBIHelAci71660_0104.

Phylogenomic databases

eggNOGiENOG4105C07. Bacteria.
COG0060. LUCA.
HOGENOMiHOG000246402.
KOiK01870.
OMAiTHGFIVD.
OrthoDBiPOG091H028I.

Family and domain databases

CDDicd07960. Anticodon_Ia_Ile_BEm. 1 hit.
Gene3Di1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPiMF_02002. Ile_tRNA_synth_type1. 1 hit.
InterProiIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR033708. Anticodon_Ile_BEm.
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_Ia_anticodon-bd.
IPR009008. Val/Leu/Ile-tRNA-synth_edit.
[Graphical view]
PfamiPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 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...

Entry informationi

Entry nameiSYI_HELAH
AccessioniPrimary (citable) accession number: Q17ZG3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: July 25, 2006
Last modified: November 2, 2016
This is version 76 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

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 one 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.