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Protein

Isoleucine--tRNA ligase

Gene

ileS

Organism
Streptococcus pyogenes serotype M3 (strain SSI-1)
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

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei554Aminoacyl-adenylateUniRule annotation1
Binding sitei598ATPUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionAminoacyl-tRNA synthetase, Ligase
Biological processProtein biosynthesis
LigandATP-binding, Nucleotide-binding

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:SPs0696
OrganismiStreptococcus pyogenes serotype M3 (strain SSI-1)
Taxonomic identifieri193567 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeStreptococcus

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00004116111 – 933Isoleucine--tRNA ligaseAdd BLAST933

Interactioni

Subunit structurei

Monomer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliP0DG43
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi57 – 67"HIGH" regionAdd BLAST11
Motifi595 – 599"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

HOGENOMiHOG000246402
KOiK01870
OMAiHLGTAWN

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
PfamiView protein in Pfam
PF08264 Anticodon_1, 1 hit
PF00133 tRNA-synt_1, 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.

P0DG43-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKLKETLNLG KTAFPMRAGL PNKEPQWQAA WEEADLYTKR QELNAGKPAF
60 70 80 90 100
HLHDGPPYAN GNIHVGHALN KISKDIIVRS KSMSGFHVPY VPGWDTHGLP
110 120 130 140 150
IEQVLAKQGV KRKEMDLADY LDMCRQYALS QVDKQRDDFK RLGVSADWEN
160 170 180 190 200
PYVTLDPQFE ADQIRVFGAM ADKGYIYRGA KPVYWSWSSE SALAEAEIEY
210 220 230 240 250
HDIDSTSLYY ANKVKDGKGI LDTNTYIVVW TTTPFTVTAS RGLTVGPDMD
260 270 280 290 300
YLVVKPAGSD RQYVVAEGLL DSLAGKFGWE SFETLASHKG ADLEYIVTEH
310 320 330 340 350
PWDTDVEELV ILGDHVTLES GTGIVHTAPG FGEDDYNVGT KYKLEVAVTV
360 370 380 390 400
DERGLMMENA GPDFHGQFYD KVTPIVIDKL GDLLLAQEVI NHSYPFDWRT
410 420 430 440 450
KKPIIWRAVP QWFASVSDFR QDILDEIEKT TFHPSWGKTR LYNMIRDRGD
460 470 480 490 500
WVISRQRAWG VPLPIFYAED GTAIMTKEVT DHVANLFQEN GSIIWWQKEA
510 520 530 540 550
KDLLPEGFTH PGSPNGEFTK ETDIMDVWFD SGSSWNGVMN ARDNLSYPAD
560 570 580 590 600
LYLEGSDQYR GWFNSSLITS VAVNGHAPYK AILSQGFVLD GKGEKMSKSK
610 620 630 640 650
GNIISPNDVA KQYGADILRL WVASVDTDND VRVSMEILGQ VSETYRKIRN
660 670 680 690 700
TLRFLIANTS DFNPATDTVA YADLGAVDKY MTIVFNQLVA TINDAYERYD
710 720 730 740 750
FMTIYKAVVN FVTVDLSAFY LDFAKDVVYI EAANSLERRR MQTVFYDILV
760 770 780 790 800
KITKLLTPIL PHTTEEIWSY LEHESEAFVQ LAEMPAAETF SAQEDILEAW
810 820 830 840 850
SAFMTLRTQA QKALEEARNA KVIGKSLEAH LTIYASEEVK TLLTALDSDI
860 870 880 890 900
ALLLIVSQLT IADLADAPAD AVAFEGVAFT VEHAVGEVCE RSRRIDPTTR
910 920 930
MRSYNAFVCD HSAKIIEENF PEAVAEGFEE SGK
Length:933
Mass (Da):104,907
Last modified:July 27, 2011 - v1
Checksum:iAF7E116AB7FDF9EE
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000034 Genomic DNA Translation: BAC63791.1
RefSeqiWP_011054710.1, NC_004606.1

Genome annotation databases

EnsemblBacteriaiBAC63791; BAC63791; BAC63791
KEGGisps:SPs0696

Similar proteinsi

Entry informationi

Entry nameiSYI_STRPQ
AccessioniPrimary (citable) accession number: P0DG43
Secondary accession number(s): Q79XQ2, Q8K6S2
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 27, 2011
Last sequence update: July 27, 2011
Last modified: March 28, 2018
This is version 47 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

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

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