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Protein

Isoleucine--tRNA ligase

Gene

ileS

Organism
Exiguobacterium sibiricum (strain DSM 17290 / JCM 13490 / 255-15)
Status
Reviewed-Annotation score: -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 sitei551Aminoacyl-adenylateUniRule annotation1
Binding sitei595ATPUniRule annotation1
Metal bindingi881ZincUniRule annotation1
Metal bindingi884ZincUniRule annotation1
Metal bindingi901ZincUniRule annotation1
Metal bindingi904ZincUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionAminoacyl-tRNA synthetase, Ligase
Biological processProtein biosynthesis
LigandATP-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:Exig_1951
OrganismiExiguobacterium sibiricum (strain DSM 17290 / JCM 13490 / 255-15)
Taxonomic identifieri262543 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliBacillalesBacillales Family XII. Incertae SedisExiguobacterium
Proteomesi
  • UP000001681 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10001891661 – 911Isoleucine--tRNA ligaseAdd BLAST911

Interactioni

Subunit structurei

Monomer.UniRule annotation

Protein-protein interaction databases

STRINGi262543.Exig_1951

Structurei

3D structure databases

ProteinModelPortaliB1YIS7
SMRiB1YIS7
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi57 – 67"HIGH" regionAdd BLAST11
Motifi592 – 596"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
OMAiHLGTAWN
OrthoDBiPOG091H028I

Family and domain databases

CDDicd07960 Anticodon_Ia_Ile_BEm, 1 hit
Gene3Di3.40.50.620, 2 hits
3.90.740.10, 1 hit
HAMAPiMF_02002 Ile_tRNA_synth_type1, 1 hit
InterProiView protein in InterPro
IPR001412 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
IPR010663 Znf_FPG/IleRS
PfamiView protein in Pfam
PF08264 Anticodon_1, 1 hit
PF00133 tRNA-synt_1, 1 hit
PF06827 zf-FPG_IleRS, 1 hit
PRINTSiPR00984 TRNASYNTHILE
SUPFAMiSSF47323 SSF47323, 1 hit
SSF50677 SSF50677, 1 hit
TIGRFAMsiTIGR00392 ileS, 1 hit
PROSITEiView protein in PROSITE
PS00178 AA_TRNA_LIGASE_I, 1 hit

Sequencei

Sequence statusi: Complete.

B1YIS7-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEYKDTLLMM KTEFLMRGNL PKREPDMQAR WNEMNLYEAV QEKNAGKPTF
60 70 80 90 100
ILHDGPPYAN GDIHMGHGLN KVLKDIVVRY KSMNGFRSPY VPGWDTHGLP
110 120 130 140 150
IETALQKAGV DRKSMSVAEF RELCAKYALE QVDHQREQFK RLGVLGDYDN
160 170 180 190 200
PYITLQPEFE AAQIRLFGDM ANKGYIYKGK KPVYWSPSSE SALAEAEIEY
210 220 230 240 250
QDKRSAAIYV AFQVMDGKNI LEPTDHFVIW TTTPWTIPAN LGISVSGELT
260 270 280 290 300
YARIEHEGKG YIVAETLVPE VIEALGWEGA TIGRVFDGAD FEYIKAKHPL
310 320 330 340 350
YDRESLVMLG DHVTAEATGV VHTAPGHGED DFRIGQAYGL DVLCPVDDKG
360 370 380 390 400
VMTAEAPGFE GLFYEDANKE IGVALEEAGA LLKLSFIKHS YPHDWRTKKP
410 420 430 440 450
VIFRATPQWF ASIKDFRAEI LDEIKEVQWV PEWGETRLHN MFKDRGDWVI
460 470 480 490 500
SRQRAWGVPL PIFYAEDGTE IVTPETIDHI ANLFAAHGSN VWYEREAVDL
510 520 530 540 550
LPEGFTHPAS PNGIFKKETD IMDVWFDSGS SHAGVLATRP ELERPADLYL
560 570 580 590 600
EGSDQYRGWF NSSLSTSVAT TGKAPYKAVV SHGFVLDGQG RKMSKSIGNT
610 620 630 640 650
IAPIQIMQQF GAEILRLWVA SVDYQSDVRA SMDNFKQVSE SYRKIRNTVR
660 670 680 690 700
FLLGNLDQFD HTTHRVAFKD LPESDRFMRT KLDQLVGKVK AAYDAYDFMA
710 720 730 740 750
VYQLLHNFCV LDLSSFYLDY TKDILYIEKE DAPARRAVQT VMYDTVVTLL
760 770 780 790 800
QLMAPVLPHT ADEAWEFVPG VETASIFLTD LPEAPEMTEE GLALIAKWNS
810 820 830 840 850
FLVFRDDVLK ALEEARAEKL VGKTLEAKLL LAPNDETKAL LATIDHLEQL
860 870 880 890 900
LQVSQIEFVA SAEKSYGTTG ITVLKADGEK CERCWTYSTE LGQDPAHPTL
910
CPRCTEVVNS L
Length:911
Mass (Da):102,680
Last modified:May 20, 2008 - v1
Checksum:i715DFFE7B370694A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP001022 Genomic DNA Translation: ACB61403.1
RefSeqiWP_012370821.1, NC_010556.1

Genome annotation databases

EnsemblBacteriaiACB61403; ACB61403; Exig_1951
GeneIDi31770076
KEGGiesi:Exig_1951

Similar proteinsi

Entry informationi

Entry nameiSYI_EXIS2
AccessioniPrimary (citable) accession number: B1YIS7
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: May 20, 2008
Last modified: March 28, 2018
This is version 72 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health